test/CodeGen/X86/memcmp-more-load-pairs.ll - llvm-project/llvm - Git at Google

 ; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
 ; NOTE: This is a copy of llvm/test/CodeGen/X86/memcmp.ll with more load pairs. Please keep it that way.
 ; RUN: llc -max-loads-per-memcmp=4 -memcmp-num-loads-per-block=4 < %s -mtriple=i686-unknown-unknown -mattr=cmov     | FileCheck %s --check-prefixes=X86,X86-NOSSE
 ; RUN: llc -max-loads-per-memcmp=4 -memcmp-num-loads-per-block=4 < %s -mtriple=i686-unknown-unknown -mattr=+sse     | FileCheck %s --check-prefixes=X86,X86-SSE1
 ; RUN: llc -max-loads-per-memcmp=4 -memcmp-num-loads-per-block=4 < %s -mtriple=i686-unknown-unknown -mattr=+sse2    | FileCheck %s --check-prefixes=X86,X86-SSE2
 ; RUN: llc -max-loads-per-memcmp=4 -memcmp-num-loads-per-block=4 < %s -mtriple=i686-unknown-unknown -mattr=+sse4.1  | FileCheck %s --check-prefixes=X86,X86-SSE41
 ; RUN: llc -max-loads-per-memcmp=4 -memcmp-num-loads-per-block=4 < %s -mtriple=x86_64-unknown-unknown               | FileCheck %s --check-prefixes=X64,X64-SSE,X64-SSE2
 ; RUN: llc -max-loads-per-memcmp=4 -memcmp-num-loads-per-block=4 < %s -mtriple=x86_64-unknown-unknown -mattr=sse4.1 | FileCheck %s --check-prefixes=X64,X64-SSE,X64-SSE41
 ; RUN: llc -max-loads-per-memcmp=4 -memcmp-num-loads-per-block=4 < %s -mtriple=x86_64-unknown-unknown -mattr=avx    | FileCheck %s --check-prefixes=X64,X64-AVX,X64-AVX1
 ; RUN: llc -max-loads-per-memcmp=4 -memcmp-num-loads-per-block=4 < %s -mtriple=x86_64-unknown-unknown -mattr=avx2   | FileCheck %s --check-prefixes=X64,X64-AVX,X64-AVX2
 ; RUN: llc -max-loads-per-memcmp=4 -memcmp-num-loads-per-block=4 < %s -mtriple=x86_64-unknown-unknown -mattr=avx512bw,+prefer-256-bit | FileCheck %s --check-prefixes=X64,X64-AVX,X64-AVX2
 ; RUN: llc -max-loads-per-memcmp=4 -memcmp-num-loads-per-block=4 < %s -mtriple=x86_64-unknown-unknown -mattr=avx512bw,-prefer-256-bit | FileCheck %s --check-prefixes=X64,X64-AVX,X64-AVX512,X64-AVX512BW
 ; RUN: llc -max-loads-per-memcmp=4 -memcmp-num-loads-per-block=4 < %s -mtriple=x86_64-unknown-unknown -mattr=avx512f,+prefer-256-bit,-prefer-mask-registers | FileCheck %s --check-prefixes=X64,X64-AVX,X64-AVX2
 ; RUN: llc -max-loads-per-memcmp=4 -memcmp-num-loads-per-block=4 < %s -mtriple=x86_64-unknown-unknown -mattr=avx512f,-prefer-256-bit,-prefer-mask-registers | FileCheck %s --check-prefixes=X64,X64-AVX,X64-AVX512,X64-AVX512F
 ; RUN: llc -max-loads-per-memcmp=4 -memcmp-num-loads-per-block=4 < %s -mtriple=x86_64-unknown-unknown -mattr=avx512f,+prefer-256-bit,+prefer-mask-registers | FileCheck %s --check-prefixes=X64,X64-MIC-AVX,X64-MIC-AVX2
 ; RUN: llc -max-loads-per-memcmp=4 -memcmp-num-loads-per-block=4 < %s -mtriple=x86_64-unknown-unknown -mattr=avx512f,-prefer-256-bit,+prefer-mask-registers | FileCheck %s --check-prefixes=X64,X64-MIC-AVX,X64-MIC-AVX512F

 ; This tests codegen time inlining/optimization of memcmp
 ; rdar://6480398

 @.str = private constant [513 x i8] c"01234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901\00", align 1

 declare dso_local i32 @memcmp(i8*, i8*, i64)

 define i32 @length0(i8* %X, i8* %Y) nounwind {
 ; X86-LABEL: length0:
 ; X86:       # %bb.0:
 ; X86-NEXT:    xorl %eax, %eax
 ; X86-NEXT:    retl
 ;
 ; X64-LABEL: length0:
 ; X64:       # %bb.0:
 ; X64-NEXT:    xorl %eax, %eax
 ; X64-NEXT:    retq
    %m = tail call i32 @memcmp(i8* %X, i8* %Y, i64 0) nounwind
    ret i32 %m
  }

 define i1 @length0_eq(i8* %X, i8* %Y) nounwind {
 ; X86-LABEL: length0_eq:
 ; X86:       # %bb.0:
 ; X86-NEXT:    movb $1, %al
 ; X86-NEXT:    retl
 ;
 ; X64-LABEL: length0_eq:
 ; X64:       # %bb.0:
 ; X64-NEXT:    movb $1, %al
 ; X64-NEXT:    retq
   %m = tail call i32 @memcmp(i8* %X, i8* %Y, i64 0) nounwind
   %c = icmp eq i32 %m, 0
   ret i1 %c
 }

 define i1 @length0_lt(i8* %X, i8* %Y) nounwind {
 ; X86-LABEL: length0_lt:
 ; X86:       # %bb.0:
 ; X86-NEXT:    xorl %eax, %eax
 ; X86-NEXT:    retl
 ;
 ; X64-LABEL: length0_lt:
 ; X64:       # %bb.0:
 ; X64-NEXT:    xorl %eax, %eax
 ; X64-NEXT:    retq
   %m = tail call i32 @memcmp(i8* %X, i8* %Y, i64 0) nounwind
   %c = icmp slt i32 %m, 0
   ret i1 %c
 }

 define i32 @length2(i8* %X, i8* %Y) nounwind {
 ; X86-LABEL: length2:
 ; X86:       # %bb.0:
 ; X86-NEXT:    movl {{[0-9]+}}(%esp), %eax
 ; X86-NEXT:    movl {{[0-9]+}}(%esp), %ecx
 ; X86-NEXT:    movzwl (%ecx), %ecx
 ; X86-NEXT:    movzwl (%eax), %edx
 ; X86-NEXT:    rolw $8, %cx
 ; X86-NEXT:    rolw $8, %dx
 ; X86-NEXT:    movzwl %cx, %eax
 ; X86-NEXT:    movzwl %dx, %ecx
 ; X86-NEXT:    subl %ecx, %eax
 ; X86-NEXT:    retl
 ;
 ; X64-LABEL: length2:
 ; X64:       # %bb.0:
 ; X64-NEXT:    movzwl (%rdi), %eax
 ; X64-NEXT:    movzwl (%rsi), %ecx
 ; X64-NEXT:    rolw $8, %ax
 ; X64-NEXT:    rolw $8, %cx
 ; X64-NEXT:    movzwl %ax, %eax
 ; X64-NEXT:    movzwl %cx, %ecx
 ; X64-NEXT:    subl %ecx, %eax
 ; X64-NEXT:    retq
   %m = tail call i32 @memcmp(i8* %X, i8* %Y, i64 2) nounwind
   ret i32 %m
 }

 define i1 @length2_eq(i8* %X, i8* %Y) nounwind {
 ; X86-LABEL: length2_eq:
 ; X86:       # %bb.0:
 ; X86-NEXT:    movl {{[0-9]+}}(%esp), %eax
 ; X86-NEXT:    movl {{[0-9]+}}(%esp), %ecx
 ; X86-NEXT:    movzwl (%ecx), %ecx
 ; X86-NEXT:    cmpw (%eax), %cx
 ; X86-NEXT:    sete %al
 ; X86-NEXT:    retl
 ;
 ; X64-LABEL: length2_eq:
 ; X64:       # %bb.0:
 ; X64-NEXT:    movzwl (%rdi), %eax
 ; X64-NEXT:    cmpw (%rsi), %ax
 ; X64-NEXT:    sete %al
 ; X64-NEXT:    retq
   %m = tail call i32 @memcmp(i8* %X, i8* %Y, i64 2) nounwind
   %c = icmp eq i32 %m, 0
   ret i1 %c
 }

 define i1 @length2_lt(i8* %X, i8* %Y) nounwind {
 ; X86-LABEL: length2_lt:
 ; X86:       # %bb.0:
 ; X86-NEXT:    movl {{[0-9]+}}(%esp), %eax
 ; X86-NEXT:    movl {{[0-9]+}}(%esp), %ecx
 ; X86-NEXT:    movzwl (%ecx), %ecx
 ; X86-NEXT:    movzwl (%eax), %edx
 ; X86-NEXT:    rolw $8, %cx
 ; X86-NEXT:    rolw $8, %dx
 ; X86-NEXT:    movzwl %cx, %eax
 ; X86-NEXT:    movzwl %dx, %ecx
 ; X86-NEXT:    subl %ecx, %eax
 ; X86-NEXT:    shrl $31, %eax
 ; X86-NEXT:    # kill: def $al killed $al killed $eax
 ; X86-NEXT:    retl
 ;
 ; X64-LABEL: length2_lt:
 ; X64:       # %bb.0:
 ; X64-NEXT:    movzwl (%rdi), %eax
 ; X64-NEXT:    movzwl (%rsi), %ecx
 ; X64-NEXT:    rolw $8, %ax
 ; X64-NEXT:    rolw $8, %cx
 ; X64-NEXT:    movzwl %ax, %eax
 ; X64-NEXT:    movzwl %cx, %ecx
 ; X64-NEXT:    subl %ecx, %eax
 ; X64-NEXT:    shrl $31, %eax
 ; X64-NEXT:    # kill: def $al killed $al killed $eax
 ; X64-NEXT:    retq
   %m = tail call i32 @memcmp(i8* %X, i8* %Y, i64 2) nounwind
   %c = icmp slt i32 %m, 0
   ret i1 %c
 }

 define i1 @length2_gt(i8* %X, i8* %Y) nounwind {
 ; X86-LABEL: length2_gt:
 ; X86:       # %bb.0:
 ; X86-NEXT:    movl {{[0-9]+}}(%esp), %eax
 ; X86-NEXT:    movl {{[0-9]+}}(%esp), %ecx
 ; X86-NEXT:    movzwl (%ecx), %ecx
 ; X86-NEXT:    movzwl (%eax), %eax
 ; X86-NEXT:    rolw $8, %cx
 ; X86-NEXT:    rolw $8, %ax
 ; X86-NEXT:    movzwl %cx, %ecx
 ; X86-NEXT:    movzwl %ax, %eax
 ; X86-NEXT:    subl %eax, %ecx
 ; X86-NEXT:    testl %ecx, %ecx
 ; X86-NEXT:    setg %al
 ; X86-NEXT:    retl
 ;
 ; X64-LABEL: length2_gt:
 ; X64:       # %bb.0:
 ; X64-NEXT:    movzwl (%rdi), %eax
 ; X64-NEXT:    movzwl (%rsi), %ecx
 ; X64-NEXT:    rolw $8, %ax
 ; X64-NEXT:    rolw $8, %cx
 ; X64-NEXT:    movzwl %ax, %eax
 ; X64-NEXT:    movzwl %cx, %ecx
 ; X64-NEXT:    subl %ecx, %eax
 ; X64-NEXT:    testl %eax, %eax
 ; X64-NEXT:    setg %al
 ; X64-NEXT:    retq
   %m = tail call i32 @memcmp(i8* %X, i8* %Y, i64 2) nounwind
   %c = icmp sgt i32 %m, 0
   ret i1 %c
 }

 define i1 @length2_eq_const(i8* %X) nounwind {
 ; X86-LABEL: length2_eq_const:
 ; X86:       # %bb.0:
 ; X86-NEXT:    movl {{[0-9]+}}(%esp), %eax
 ; X86-NEXT:    movzwl (%eax), %eax
 ; X86-NEXT:    cmpl $12849, %eax # imm = 0x3231
 ; X86-NEXT:    setne %al
 ; X86-NEXT:    retl
 ;
 ; X64-LABEL: length2_eq_const:
 ; X64:       # %bb.0:
 ; X64-NEXT:    movzwl (%rdi), %eax
 ; X64-NEXT:    cmpl $12849, %eax # imm = 0x3231
 ; X64-NEXT:    setne %al
 ; X64-NEXT:    retq
   %m = tail call i32 @memcmp(i8* %X, i8* getelementptr inbounds ([513 x i8], [513 x i8]* @.str, i32 0, i32 1), i64 2) nounwind
   %c = icmp ne i32 %m, 0
   ret i1 %c
 }

 define i1 @length2_eq_nobuiltin_attr(i8* %X, i8* %Y) nounwind {
 ; X86-LABEL: length2_eq_nobuiltin_attr:
 ; X86:       # %bb.0:
 ; X86-NEXT:    pushl $0
 ; X86-NEXT:    pushl $2
 ; X86-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NEXT:    calll memcmp
 ; X86-NEXT:    addl $16, %esp
 ; X86-NEXT:    testl %eax, %eax
 ; X86-NEXT:    sete %al
 ; X86-NEXT:    retl
 ;
 ; X64-LABEL: length2_eq_nobuiltin_attr:
 ; X64:       # %bb.0:
 ; X64-NEXT:    pushq %rax
 ; X64-NEXT:    movl $2, %edx
 ; X64-NEXT:    callq memcmp
 ; X64-NEXT:    testl %eax, %eax
 ; X64-NEXT:    sete %al
 ; X64-NEXT:    popq %rcx
 ; X64-NEXT:    retq
   %m = tail call i32 @memcmp(i8* %X, i8* %Y, i64 2) nounwind nobuiltin
   %c = icmp eq i32 %m, 0
   ret i1 %c
 }

 define i32 @length3(i8* %X, i8* %Y) nounwind {
 ; X86-LABEL: length3:
 ; X86:       # %bb.0:
 ; X86-NEXT:    pushl %esi
 ; X86-NEXT:    movl {{[0-9]+}}(%esp), %ecx
 ; X86-NEXT:    movl {{[0-9]+}}(%esp), %eax
 ; X86-NEXT:    movzwl (%eax), %edx
 ; X86-NEXT:    movzwl (%ecx), %esi
 ; X86-NEXT:    rolw $8, %dx
 ; X86-NEXT:    rolw $8, %si
 ; X86-NEXT:    cmpw %si, %dx
 ; X86-NEXT:    jne .LBB9_3
 ; X86-NEXT:  # %bb.1: # %loadbb1
 ; X86-NEXT:    movzbl 2(%eax), %eax
 ; X86-NEXT:    movzbl 2(%ecx), %ecx
 ; X86-NEXT:    subl %ecx, %eax
 ; X86-NEXT:    popl %esi
 ; X86-NEXT:    retl
 ; X86-NEXT:  .LBB9_3: # %res_block
 ; X86-NEXT:    setae %al
 ; X86-NEXT:    movzbl %al, %eax
 ; X86-NEXT:    leal -1(%eax,%eax), %eax
 ; X86-NEXT:    popl %esi
 ; X86-NEXT:    retl
 ;
 ; X64-LABEL: length3:
 ; X64:       # %bb.0:
 ; X64-NEXT:    movzwl (%rdi), %eax
 ; X64-NEXT:    movzwl (%rsi), %ecx
 ; X64-NEXT:    rolw $8, %ax
 ; X64-NEXT:    rolw $8, %cx
 ; X64-NEXT:    cmpw %cx, %ax
 ; X64-NEXT:    jne .LBB9_3
 ; X64-NEXT:  # %bb.1: # %loadbb1
 ; X64-NEXT:    movzbl 2(%rdi), %eax
 ; X64-NEXT:    movzbl 2(%rsi), %ecx
 ; X64-NEXT:    subl %ecx, %eax
 ; X64-NEXT:    retq
 ; X64-NEXT:  .LBB9_3: # %res_block
 ; X64-NEXT:    setae %al
 ; X64-NEXT:    movzbl %al, %eax
 ; X64-NEXT:    leal -1(%rax,%rax), %eax
 ; X64-NEXT:    retq
   %m = tail call i32 @memcmp(i8* %X, i8* %Y, i64 3) nounwind
   ret i32 %m
 }

 define i1 @length3_eq(i8* %X, i8* %Y) nounwind {
 ; X86-LABEL: length3_eq:
 ; X86:       # %bb.0:
 ; X86-NEXT:    movl {{[0-9]+}}(%esp), %eax
 ; X86-NEXT:    movl {{[0-9]+}}(%esp), %ecx
 ; X86-NEXT:    movzwl (%ecx), %edx
 ; X86-NEXT:    xorw (%eax), %dx
 ; X86-NEXT:    movb 2(%ecx), %cl
 ; X86-NEXT:    xorb 2(%eax), %cl
 ; X86-NEXT:    movzbl %cl, %eax
 ; X86-NEXT:    orw %dx, %ax
 ; X86-NEXT:    setne %al
 ; X86-NEXT:    retl
 ;
 ; X64-LABEL: length3_eq:
 ; X64:       # %bb.0:
 ; X64-NEXT:    movzwl (%rdi), %eax
 ; X64-NEXT:    xorw (%rsi), %ax
 ; X64-NEXT:    movb 2(%rdi), %cl
 ; X64-NEXT:    xorb 2(%rsi), %cl
 ; X64-NEXT:    movzbl %cl, %ecx
 ; X64-NEXT:    orw %ax, %cx
 ; X64-NEXT:    setne %al
 ; X64-NEXT:    retq
   %m = tail call i32 @memcmp(i8* %X, i8* %Y, i64 3) nounwind
   %c = icmp ne i32 %m, 0
   ret i1 %c
 }

 define i32 @length4(i8* %X, i8* %Y) nounwind {
 ; X86-LABEL: length4:
 ; X86:       # %bb.0:
 ; X86-NEXT:    movl {{[0-9]+}}(%esp), %eax
 ; X86-NEXT:    movl {{[0-9]+}}(%esp), %ecx
 ; X86-NEXT:    movl (%ecx), %ecx
 ; X86-NEXT:    movl (%eax), %edx
 ; X86-NEXT:    bswapl %ecx
 ; X86-NEXT:    bswapl %edx
 ; X86-NEXT:    xorl %eax, %eax
 ; X86-NEXT:    cmpl %edx, %ecx
 ; X86-NEXT:    seta %al
 ; X86-NEXT:    sbbl $0, %eax
 ; X86-NEXT:    retl
 ;
 ; X64-LABEL: length4:
 ; X64:       # %bb.0:
 ; X64-NEXT:    movl (%rdi), %ecx
 ; X64-NEXT:    movl (%rsi), %edx
 ; X64-NEXT:    bswapl %ecx
 ; X64-NEXT:    bswapl %edx
 ; X64-NEXT:    xorl %eax, %eax
 ; X64-NEXT:    cmpl %edx, %ecx
 ; X64-NEXT:    seta %al
 ; X64-NEXT:    sbbl $0, %eax
 ; X64-NEXT:    retq
   %m = tail call i32 @memcmp(i8* %X, i8* %Y, i64 4) nounwind
   ret i32 %m
 }

 define i1 @length4_eq(i8* %X, i8* %Y) nounwind {
 ; X86-LABEL: length4_eq:
 ; X86:       # %bb.0:
 ; X86-NEXT:    movl {{[0-9]+}}(%esp), %eax
 ; X86-NEXT:    movl {{[0-9]+}}(%esp), %ecx
 ; X86-NEXT:    movl (%ecx), %ecx
 ; X86-NEXT:    cmpl (%eax), %ecx
 ; X86-NEXT:    setne %al
 ; X86-NEXT:    retl
 ;
 ; X64-LABEL: length4_eq:
 ; X64:       # %bb.0:
 ; X64-NEXT:    movl (%rdi), %eax
 ; X64-NEXT:    cmpl (%rsi), %eax
 ; X64-NEXT:    setne %al
 ; X64-NEXT:    retq
   %m = tail call i32 @memcmp(i8* %X, i8* %Y, i64 4) nounwind
   %c = icmp ne i32 %m, 0
   ret i1 %c
 }

 define i1 @length4_lt(i8* %X, i8* %Y) nounwind {
 ; X86-LABEL: length4_lt:
 ; X86:       # %bb.0:
 ; X86-NEXT:    movl {{[0-9]+}}(%esp), %eax
 ; X86-NEXT:    movl {{[0-9]+}}(%esp), %ecx
 ; X86-NEXT:    movl (%ecx), %ecx
 ; X86-NEXT:    movl (%eax), %edx
 ; X86-NEXT:    bswapl %ecx
 ; X86-NEXT:    bswapl %edx
 ; X86-NEXT:    xorl %eax, %eax
 ; X86-NEXT:    cmpl %edx, %ecx
 ; X86-NEXT:    seta %al
 ; X86-NEXT:    sbbl $0, %eax
 ; X86-NEXT:    shrl $31, %eax
 ; X86-NEXT:    # kill: def $al killed $al killed $eax
 ; X86-NEXT:    retl
 ;
 ; X64-LABEL: length4_lt:
 ; X64:       # %bb.0:
 ; X64-NEXT:    movl (%rdi), %ecx
 ; X64-NEXT:    movl (%rsi), %edx
 ; X64-NEXT:    bswapl %ecx
 ; X64-NEXT:    bswapl %edx
 ; X64-NEXT:    xorl %eax, %eax
 ; X64-NEXT:    cmpl %edx, %ecx
 ; X64-NEXT:    seta %al
 ; X64-NEXT:    sbbl $0, %eax
 ; X64-NEXT:    shrl $31, %eax
 ; X64-NEXT:    # kill: def $al killed $al killed $eax
 ; X64-NEXT:    retq
   %m = tail call i32 @memcmp(i8* %X, i8* %Y, i64 4) nounwind
   %c = icmp slt i32 %m, 0
   ret i1 %c
 }

 define i1 @length4_gt(i8* %X, i8* %Y) nounwind {
 ; X86-LABEL: length4_gt:
 ; X86:       # %bb.0:
 ; X86-NEXT:    movl {{[0-9]+}}(%esp), %eax
 ; X86-NEXT:    movl {{[0-9]+}}(%esp), %ecx
 ; X86-NEXT:    movl (%ecx), %ecx
 ; X86-NEXT:    movl (%eax), %eax
 ; X86-NEXT:    bswapl %ecx
 ; X86-NEXT:    bswapl %eax
 ; X86-NEXT:    xorl %edx, %edx
 ; X86-NEXT:    cmpl %eax, %ecx
 ; X86-NEXT:    seta %dl
 ; X86-NEXT:    sbbl $0, %edx
 ; X86-NEXT:    testl %edx, %edx
 ; X86-NEXT:    setg %al
 ; X86-NEXT:    retl
 ;
 ; X64-LABEL: length4_gt:
 ; X64:       # %bb.0:
 ; X64-NEXT:    movl (%rdi), %eax
 ; X64-NEXT:    movl (%rsi), %ecx
 ; X64-NEXT:    bswapl %eax
 ; X64-NEXT:    bswapl %ecx
 ; X64-NEXT:    xorl %edx, %edx
 ; X64-NEXT:    cmpl %ecx, %eax
 ; X64-NEXT:    seta %dl
 ; X64-NEXT:    sbbl $0, %edx
 ; X64-NEXT:    testl %edx, %edx
 ; X64-NEXT:    setg %al
 ; X64-NEXT:    retq
   %m = tail call i32 @memcmp(i8* %X, i8* %Y, i64 4) nounwind
   %c = icmp sgt i32 %m, 0
   ret i1 %c
 }

 define i1 @length4_eq_const(i8* %X) nounwind {
 ; X86-LABEL: length4_eq_const:
 ; X86:       # %bb.0:
 ; X86-NEXT:    movl {{[0-9]+}}(%esp), %eax
 ; X86-NEXT:    cmpl $875770417, (%eax) # imm = 0x34333231
 ; X86-NEXT:    sete %al
 ; X86-NEXT:    retl
 ;
 ; X64-LABEL: length4_eq_const:
 ; X64:       # %bb.0:
 ; X64-NEXT:    cmpl $875770417, (%rdi) # imm = 0x34333231
 ; X64-NEXT:    sete %al
 ; X64-NEXT:    retq
   %m = tail call i32 @memcmp(i8* %X, i8* getelementptr inbounds ([513 x i8], [513 x i8]* @.str, i32 0, i32 1), i64 4) nounwind
   %c = icmp eq i32 %m, 0
   ret i1 %c
 }

 define i32 @length5(i8* %X, i8* %Y) nounwind {
 ; X86-LABEL: length5:
 ; X86:       # %bb.0:
 ; X86-NEXT:    pushl %esi
 ; X86-NEXT:    movl {{[0-9]+}}(%esp), %ecx
 ; X86-NEXT:    movl {{[0-9]+}}(%esp), %eax
 ; X86-NEXT:    movl (%eax), %edx
 ; X86-NEXT:    movl (%ecx), %esi
 ; X86-NEXT:    bswapl %edx
 ; X86-NEXT:    bswapl %esi
 ; X86-NEXT:    cmpl %esi, %edx
 ; X86-NEXT:    jne .LBB16_3
 ; X86-NEXT:  # %bb.1: # %loadbb1
 ; X86-NEXT:    movzbl 4(%eax), %eax
 ; X86-NEXT:    movzbl 4(%ecx), %ecx
 ; X86-NEXT:    subl %ecx, %eax
 ; X86-NEXT:    popl %esi
 ; X86-NEXT:    retl
 ; X86-NEXT:  .LBB16_3: # %res_block
 ; X86-NEXT:    setae %al
 ; X86-NEXT:    movzbl %al, %eax
 ; X86-NEXT:    leal -1(%eax,%eax), %eax
 ; X86-NEXT:    popl %esi
 ; X86-NEXT:    retl
 ;
 ; X64-LABEL: length5:
 ; X64:       # %bb.0:
 ; X64-NEXT:    movl (%rdi), %eax
 ; X64-NEXT:    movl (%rsi), %ecx
 ; X64-NEXT:    bswapl %eax
 ; X64-NEXT:    bswapl %ecx
 ; X64-NEXT:    cmpl %ecx, %eax
 ; X64-NEXT:    jne .LBB16_3
 ; X64-NEXT:  # %bb.1: # %loadbb1
 ; X64-NEXT:    movzbl 4(%rdi), %eax
 ; X64-NEXT:    movzbl 4(%rsi), %ecx
 ; X64-NEXT:    subl %ecx, %eax
 ; X64-NEXT:    retq
 ; X64-NEXT:  .LBB16_3: # %res_block
 ; X64-NEXT:    setae %al
 ; X64-NEXT:    movzbl %al, %eax
 ; X64-NEXT:    leal -1(%rax,%rax), %eax
 ; X64-NEXT:    retq
   %m = tail call i32 @memcmp(i8* %X, i8* %Y, i64 5) nounwind
   ret i32 %m
 }

 define i1 @length5_eq(i8* %X, i8* %Y) nounwind {
 ; X86-LABEL: length5_eq:
 ; X86:       # %bb.0:
 ; X86-NEXT:    movl {{[0-9]+}}(%esp), %eax
 ; X86-NEXT:    movl {{[0-9]+}}(%esp), %ecx
 ; X86-NEXT:    movl (%ecx), %edx
 ; X86-NEXT:    xorl (%eax), %edx
 ; X86-NEXT:    movb 4(%ecx), %cl
 ; X86-NEXT:    xorb 4(%eax), %cl
 ; X86-NEXT:    movzbl %cl, %eax
 ; X86-NEXT:    orl %edx, %eax
 ; X86-NEXT:    setne %al
 ; X86-NEXT:    retl
 ;
 ; X64-LABEL: length5_eq:
 ; X64:       # %bb.0:
 ; X64-NEXT:    movl (%rdi), %eax
 ; X64-NEXT:    xorl (%rsi), %eax
 ; X64-NEXT:    movb 4(%rdi), %cl
 ; X64-NEXT:    xorb 4(%rsi), %cl
 ; X64-NEXT:    movzbl %cl, %ecx
 ; X64-NEXT:    orl %eax, %ecx
 ; X64-NEXT:    setne %al
 ; X64-NEXT:    retq
   %m = tail call i32 @memcmp(i8* %X, i8* %Y, i64 5) nounwind
   %c = icmp ne i32 %m, 0
   ret i1 %c
 }

 define i1 @length5_lt(i8* %X, i8* %Y) nounwind {
 ; X86-LABEL: length5_lt:
 ; X86:       # %bb.0:
 ; X86-NEXT:    pushl %esi
 ; X86-NEXT:    movl {{[0-9]+}}(%esp), %ecx
 ; X86-NEXT:    movl {{[0-9]+}}(%esp), %eax
 ; X86-NEXT:    movl (%eax), %edx
 ; X86-NEXT:    movl (%ecx), %esi
 ; X86-NEXT:    bswapl %edx
 ; X86-NEXT:    bswapl %esi
 ; X86-NEXT:    cmpl %esi, %edx
 ; X86-NEXT:    jne .LBB18_3
 ; X86-NEXT:  # %bb.1: # %loadbb1
 ; X86-NEXT:    movzbl 4(%eax), %eax
 ; X86-NEXT:    movzbl 4(%ecx), %ecx
 ; X86-NEXT:    subl %ecx, %eax
 ; X86-NEXT:    jmp .LBB18_2
 ; X86-NEXT:  .LBB18_3: # %res_block
 ; X86-NEXT:    setae %al
 ; X86-NEXT:    movzbl %al, %eax
 ; X86-NEXT:    leal -1(%eax,%eax), %eax
 ; X86-NEXT:  .LBB18_2: # %endblock
 ; X86-NEXT:    shrl $31, %eax
 ; X86-NEXT:    # kill: def $al killed $al killed $eax
 ; X86-NEXT:    popl %esi
 ; X86-NEXT:    retl
 ;
 ; X64-LABEL: length5_lt:
 ; X64:       # %bb.0:
 ; X64-NEXT:    movl (%rdi), %eax
 ; X64-NEXT:    movl (%rsi), %ecx
 ; X64-NEXT:    bswapl %eax
 ; X64-NEXT:    bswapl %ecx
 ; X64-NEXT:    cmpl %ecx, %eax
 ; X64-NEXT:    jne .LBB18_3
 ; X64-NEXT:  # %bb.1: # %loadbb1
 ; X64-NEXT:    movzbl 4(%rdi), %eax
 ; X64-NEXT:    movzbl 4(%rsi), %ecx
 ; X64-NEXT:    subl %ecx, %eax
 ; X64-NEXT:    shrl $31, %eax
 ; X64-NEXT:    # kill: def $al killed $al killed $eax
 ; X64-NEXT:    retq
 ; X64-NEXT:  .LBB18_3: # %res_block
 ; X64-NEXT:    setae %al
 ; X64-NEXT:    movzbl %al, %eax
 ; X64-NEXT:    leal -1(%rax,%rax), %eax
 ; X64-NEXT:    shrl $31, %eax
 ; X64-NEXT:    # kill: def $al killed $al killed $eax
 ; X64-NEXT:    retq
   %m = tail call i32 @memcmp(i8* %X, i8* %Y, i64 5) nounwind
   %c = icmp slt i32 %m, 0
   ret i1 %c
 }

 define i32 @length7(i8* %X, i8* %Y) nounwind {
 ; X86-LABEL: length7:
 ; X86:       # %bb.0:
 ; X86-NEXT:    pushl %esi
 ; X86-NEXT:    movl {{[0-9]+}}(%esp), %eax
 ; X86-NEXT:    movl {{[0-9]+}}(%esp), %esi
 ; X86-NEXT:    movl (%esi), %ecx
 ; X86-NEXT:    movl (%eax), %edx
 ; X86-NEXT:    bswapl %ecx
 ; X86-NEXT:    bswapl %edx
 ; X86-NEXT:    cmpl %edx, %ecx
 ; X86-NEXT:    jne .LBB19_2
 ; X86-NEXT:  # %bb.1: # %loadbb1
 ; X86-NEXT:    movl 3(%esi), %ecx
 ; X86-NEXT:    movl 3(%eax), %edx
 ; X86-NEXT:    bswapl %ecx
 ; X86-NEXT:    bswapl %edx
 ; X86-NEXT:    xorl %eax, %eax
 ; X86-NEXT:    cmpl %edx, %ecx
 ; X86-NEXT:    je .LBB19_3
 ; X86-NEXT:  .LBB19_2: # %res_block
 ; X86-NEXT:    xorl %eax, %eax
 ; X86-NEXT:    cmpl %edx, %ecx
 ; X86-NEXT:    setae %al
 ; X86-NEXT:    leal -1(%eax,%eax), %eax
 ; X86-NEXT:  .LBB19_3: # %endblock
 ; X86-NEXT:    popl %esi
 ; X86-NEXT:    retl
 ;
 ; X64-LABEL: length7:
 ; X64:       # %bb.0:
 ; X64-NEXT:    movl (%rdi), %ecx
 ; X64-NEXT:    movl (%rsi), %edx
 ; X64-NEXT:    bswapl %ecx
 ; X64-NEXT:    bswapl %edx
 ; X64-NEXT:    cmpl %edx, %ecx
 ; X64-NEXT:    jne .LBB19_2
 ; X64-NEXT:  # %bb.1: # %loadbb1
 ; X64-NEXT:    movl 3(%rdi), %ecx
 ; X64-NEXT:    movl 3(%rsi), %edx
 ; X64-NEXT:    bswapl %ecx
 ; X64-NEXT:    bswapl %edx
 ; X64-NEXT:    xorl %eax, %eax
 ; X64-NEXT:    cmpl %edx, %ecx
 ; X64-NEXT:    je .LBB19_3
 ; X64-NEXT:  .LBB19_2: # %res_block
 ; X64-NEXT:    xorl %eax, %eax
 ; X64-NEXT:    cmpl %edx, %ecx
 ; X64-NEXT:    setae %al
 ; X64-NEXT:    leal -1(%rax,%rax), %eax
 ; X64-NEXT:  .LBB19_3: # %endblock
 ; X64-NEXT:    retq
   %m = tail call i32 @memcmp(i8* %X, i8* %Y, i64 7) nounwind
   ret i32 %m
 }

 define i1 @length7_eq(i8* %X, i8* %Y) nounwind {
 ; X86-LABEL: length7_eq:
 ; X86:       # %bb.0:
 ; X86-NEXT:    movl {{[0-9]+}}(%esp), %eax
 ; X86-NEXT:    movl {{[0-9]+}}(%esp), %ecx
 ; X86-NEXT:    movl (%ecx), %edx
 ; X86-NEXT:    movl 3(%ecx), %ecx
 ; X86-NEXT:    xorl (%eax), %edx
 ; X86-NEXT:    xorl 3(%eax), %ecx
 ; X86-NEXT:    orl %edx, %ecx
 ; X86-NEXT:    setne %al
 ; X86-NEXT:    retl
 ;
 ; X64-LABEL: length7_eq:
 ; X64:       # %bb.0:
 ; X64-NEXT:    movl (%rdi), %eax
 ; X64-NEXT:    movl 3(%rdi), %ecx
 ; X64-NEXT:    xorl (%rsi), %eax
 ; X64-NEXT:    xorl 3(%rsi), %ecx
 ; X64-NEXT:    orl %eax, %ecx
 ; X64-NEXT:    setne %al
 ; X64-NEXT:    retq
   %m = tail call i32 @memcmp(i8* %X, i8* %Y, i64 7) nounwind
   %c = icmp ne i32 %m, 0
   ret i1 %c
 }

 define i1 @length7_lt(i8* %X, i8* %Y) nounwind {
 ; X86-LABEL: length7_lt:
 ; X86:       # %bb.0:
 ; X86-NEXT:    pushl %esi
 ; X86-NEXT:    movl {{[0-9]+}}(%esp), %eax
 ; X86-NEXT:    movl {{[0-9]+}}(%esp), %esi
 ; X86-NEXT:    movl (%esi), %ecx
 ; X86-NEXT:    movl (%eax), %edx
 ; X86-NEXT:    bswapl %ecx
 ; X86-NEXT:    bswapl %edx
 ; X86-NEXT:    cmpl %edx, %ecx
 ; X86-NEXT:    jne .LBB21_2
 ; X86-NEXT:  # %bb.1: # %loadbb1
 ; X86-NEXT:    movl 3(%esi), %ecx
 ; X86-NEXT:    movl 3(%eax), %edx
 ; X86-NEXT:    bswapl %ecx
 ; X86-NEXT:    bswapl %edx
 ; X86-NEXT:    xorl %eax, %eax
 ; X86-NEXT:    cmpl %edx, %ecx
 ; X86-NEXT:    je .LBB21_3
 ; X86-NEXT:  .LBB21_2: # %res_block
 ; X86-NEXT:    xorl %eax, %eax
 ; X86-NEXT:    cmpl %edx, %ecx
 ; X86-NEXT:    setae %al
 ; X86-NEXT:    leal -1(%eax,%eax), %eax
 ; X86-NEXT:  .LBB21_3: # %endblock
 ; X86-NEXT:    shrl $31, %eax
 ; X86-NEXT:    # kill: def $al killed $al killed $eax
 ; X86-NEXT:    popl %esi
 ; X86-NEXT:    retl
 ;
 ; X64-LABEL: length7_lt:
 ; X64:       # %bb.0:
 ; X64-NEXT:    movl (%rdi), %ecx
 ; X64-NEXT:    movl (%rsi), %edx
 ; X64-NEXT:    bswapl %ecx
 ; X64-NEXT:    bswapl %edx
 ; X64-NEXT:    cmpl %edx, %ecx
 ; X64-NEXT:    jne .LBB21_2
 ; X64-NEXT:  # %bb.1: # %loadbb1
 ; X64-NEXT:    movl 3(%rdi), %ecx
 ; X64-NEXT:    movl 3(%rsi), %edx
 ; X64-NEXT:    bswapl %ecx
 ; X64-NEXT:    bswapl %edx
 ; X64-NEXT:    xorl %eax, %eax
 ; X64-NEXT:    cmpl %edx, %ecx
 ; X64-NEXT:    je .LBB21_3
 ; X64-NEXT:  .LBB21_2: # %res_block
 ; X64-NEXT:    xorl %eax, %eax
 ; X64-NEXT:    cmpl %edx, %ecx
 ; X64-NEXT:    setae %al
 ; X64-NEXT:    leal -1(%rax,%rax), %eax
 ; X64-NEXT:  .LBB21_3: # %endblock
 ; X64-NEXT:    shrl $31, %eax
 ; X64-NEXT:    # kill: def $al killed $al killed $eax
 ; X64-NEXT:    retq
   %m = tail call i32 @memcmp(i8* %X, i8* %Y, i64 7) nounwind
   %c = icmp slt i32 %m, 0
   ret i1 %c
 }

 define i32 @length8(i8* %X, i8* %Y) nounwind {
 ; X86-LABEL: length8:
 ; X86:       # %bb.0:
 ; X86-NEXT:    pushl %esi
 ; X86-NEXT:    movl {{[0-9]+}}(%esp), %eax
 ; X86-NEXT:    movl {{[0-9]+}}(%esp), %esi
 ; X86-NEXT:    movl (%esi), %ecx
 ; X86-NEXT:    movl (%eax), %edx
 ; X86-NEXT:    bswapl %ecx
 ; X86-NEXT:    bswapl %edx
 ; X86-NEXT:    cmpl %edx, %ecx
 ; X86-NEXT:    jne .LBB22_2
 ; X86-NEXT:  # %bb.1: # %loadbb1
 ; X86-NEXT:    movl 4(%esi), %ecx
 ; X86-NEXT:    movl 4(%eax), %edx
 ; X86-NEXT:    bswapl %ecx
 ; X86-NEXT:    bswapl %edx
 ; X86-NEXT:    xorl %eax, %eax
 ; X86-NEXT:    cmpl %edx, %ecx
 ; X86-NEXT:    je .LBB22_3
 ; X86-NEXT:  .LBB22_2: # %res_block
 ; X86-NEXT:    xorl %eax, %eax
 ; X86-NEXT:    cmpl %edx, %ecx
 ; X86-NEXT:    setae %al
 ; X86-NEXT:    leal -1(%eax,%eax), %eax
 ; X86-NEXT:  .LBB22_3: # %endblock
 ; X86-NEXT:    popl %esi
 ; X86-NEXT:    retl
 ;
 ; X64-LABEL: length8:
 ; X64:       # %bb.0:
 ; X64-NEXT:    movq (%rdi), %rcx
 ; X64-NEXT:    movq (%rsi), %rdx
 ; X64-NEXT:    bswapq %rcx
 ; X64-NEXT:    bswapq %rdx
 ; X64-NEXT:    xorl %eax, %eax
 ; X64-NEXT:    cmpq %rdx, %rcx
 ; X64-NEXT:    seta %al
 ; X64-NEXT:    sbbl $0, %eax
 ; X64-NEXT:    retq
   %m = tail call i32 @memcmp(i8* %X, i8* %Y, i64 8) nounwind
   ret i32 %m
 }

 define i1 @length8_eq(i8* %X, i8* %Y) nounwind {
 ; X86-LABEL: length8_eq:
 ; X86:       # %bb.0:
 ; X86-NEXT:    movl {{[0-9]+}}(%esp), %eax
 ; X86-NEXT:    movl {{[0-9]+}}(%esp), %ecx
 ; X86-NEXT:    movl (%ecx), %edx
 ; X86-NEXT:    movl 4(%ecx), %ecx
 ; X86-NEXT:    xorl (%eax), %edx
 ; X86-NEXT:    xorl 4(%eax), %ecx
 ; X86-NEXT:    orl %edx, %ecx
 ; X86-NEXT:    sete %al
 ; X86-NEXT:    retl
 ;
 ; X64-LABEL: length8_eq:
 ; X64:       # %bb.0:
 ; X64-NEXT:    movq (%rdi), %rax
 ; X64-NEXT:    cmpq (%rsi), %rax
 ; X64-NEXT:    sete %al
 ; X64-NEXT:    retq
   %m = tail call i32 @memcmp(i8* %X, i8* %Y, i64 8) nounwind
   %c = icmp eq i32 %m, 0
   ret i1 %c
 }

 define i1 @length8_eq_const(i8* %X) nounwind {
 ; X86-LABEL: length8_eq_const:
 ; X86:       # %bb.0:
 ; X86-NEXT:    movl {{[0-9]+}}(%esp), %eax
 ; X86-NEXT:    movl $858927408, %ecx # imm = 0x33323130
 ; X86-NEXT:    xorl (%eax), %ecx
 ; X86-NEXT:    movl $926299444, %edx # imm = 0x37363534
 ; X86-NEXT:    xorl 4(%eax), %edx
 ; X86-NEXT:    orl %ecx, %edx
 ; X86-NEXT:    setne %al
 ; X86-NEXT:    retl
 ;
 ; X64-LABEL: length8_eq_const:
 ; X64:       # %bb.0:
 ; X64-NEXT:    movabsq $3978425819141910832, %rax # imm = 0x3736353433323130
 ; X64-NEXT:    cmpq %rax, (%rdi)
 ; X64-NEXT:    setne %al
 ; X64-NEXT:    retq
   %m = tail call i32 @memcmp(i8* %X, i8* getelementptr inbounds ([513 x i8], [513 x i8]* @.str, i32 0, i32 0), i64 8) nounwind
   %c = icmp ne i32 %m, 0
   ret i1 %c
 }

 define i1 @length9_eq(i8* %X, i8* %Y) nounwind {
 ; X86-LABEL: length9_eq:
 ; X86:       # %bb.0:
 ; X86-NEXT:    pushl %esi
 ; X86-NEXT:    movl {{[0-9]+}}(%esp), %eax
 ; X86-NEXT:    movl {{[0-9]+}}(%esp), %ecx
 ; X86-NEXT:    movl (%ecx), %edx
 ; X86-NEXT:    movl 4(%ecx), %esi
 ; X86-NEXT:    xorl (%eax), %edx
 ; X86-NEXT:    xorl 4(%eax), %esi
 ; X86-NEXT:    orl %edx, %esi
 ; X86-NEXT:    movb 8(%ecx), %cl
 ; X86-NEXT:    xorb 8(%eax), %cl
 ; X86-NEXT:    movzbl %cl, %eax
 ; X86-NEXT:    orl %esi, %eax
 ; X86-NEXT:    sete %al
 ; X86-NEXT:    popl %esi
 ; X86-NEXT:    retl
 ;
 ; X64-LABEL: length9_eq:
 ; X64:       # %bb.0:
 ; X64-NEXT:    movq (%rdi), %rax
 ; X64-NEXT:    xorq (%rsi), %rax
 ; X64-NEXT:    movb 8(%rdi), %cl
 ; X64-NEXT:    xorb 8(%rsi), %cl
 ; X64-NEXT:    movzbl %cl, %ecx
 ; X64-NEXT:    orq %rax, %rcx
 ; X64-NEXT:    sete %al
 ; X64-NEXT:    retq
   %m = tail call i32 @memcmp(i8* %X, i8* %Y, i64 9) nounwind
   %c = icmp eq i32 %m, 0
   ret i1 %c
 }

 define i1 @length10_eq(i8* %X, i8* %Y) nounwind {
 ; X86-LABEL: length10_eq:
 ; X86:       # %bb.0:
 ; X86-NEXT:    pushl %esi
 ; X86-NEXT:    movl {{[0-9]+}}(%esp), %eax
 ; X86-NEXT:    movl {{[0-9]+}}(%esp), %ecx
 ; X86-NEXT:    movl (%ecx), %edx
 ; X86-NEXT:    movl 4(%ecx), %esi
 ; X86-NEXT:    xorl (%eax), %edx
 ; X86-NEXT:    xorl 4(%eax), %esi
 ; X86-NEXT:    orl %edx, %esi
 ; X86-NEXT:    movzwl 8(%ecx), %ecx
 ; X86-NEXT:    xorw 8(%eax), %cx
 ; X86-NEXT:    movzwl %cx, %eax
 ; X86-NEXT:    orl %esi, %eax
 ; X86-NEXT:    sete %al
 ; X86-NEXT:    popl %esi
 ; X86-NEXT:    retl
 ;
 ; X64-LABEL: length10_eq:
 ; X64:       # %bb.0:
 ; X64-NEXT:    movq (%rdi), %rax
 ; X64-NEXT:    xorq (%rsi), %rax
 ; X64-NEXT:    movzwl 8(%rdi), %ecx
 ; X64-NEXT:    xorw 8(%rsi), %cx
 ; X64-NEXT:    movzwl %cx, %ecx
 ; X64-NEXT:    orq %rax, %rcx
 ; X64-NEXT:    sete %al
 ; X64-NEXT:    retq
   %m = tail call i32 @memcmp(i8* %X, i8* %Y, i64 10) nounwind
   %c = icmp eq i32 %m, 0
   ret i1 %c
 }

 define i1 @length11_eq(i8* %X, i8* %Y) nounwind {
 ; X86-LABEL: length11_eq:
 ; X86:       # %bb.0:
 ; X86-NEXT:    pushl %esi
 ; X86-NEXT:    movl {{[0-9]+}}(%esp), %eax
 ; X86-NEXT:    movl {{[0-9]+}}(%esp), %ecx
 ; X86-NEXT:    movl (%ecx), %edx
 ; X86-NEXT:    movl 4(%ecx), %esi
 ; X86-NEXT:    xorl (%eax), %edx
 ; X86-NEXT:    xorl 4(%eax), %esi
 ; X86-NEXT:    orl %edx, %esi
 ; X86-NEXT:    movl 7(%ecx), %ecx
 ; X86-NEXT:    xorl 7(%eax), %ecx
 ; X86-NEXT:    orl %esi, %ecx
 ; X86-NEXT:    sete %al
 ; X86-NEXT:    popl %esi
 ; X86-NEXT:    retl
 ;
 ; X64-LABEL: length11_eq:
 ; X64:       # %bb.0:
 ; X64-NEXT:    movq (%rdi), %rax
 ; X64-NEXT:    movq 3(%rdi), %rcx
 ; X64-NEXT:    xorq (%rsi), %rax
 ; X64-NEXT:    xorq 3(%rsi), %rcx
 ; X64-NEXT:    orq %rax, %rcx
 ; X64-NEXT:    sete %al
 ; X64-NEXT:    retq
   %m = tail call i32 @memcmp(i8* %X, i8* %Y, i64 11) nounwind
   %c = icmp eq i32 %m, 0
   ret i1 %c
 }

 define i1 @length12_eq(i8* %X, i8* %Y) nounwind {
 ; X86-LABEL: length12_eq:
 ; X86:       # %bb.0:
 ; X86-NEXT:    pushl %esi
 ; X86-NEXT:    movl {{[0-9]+}}(%esp), %eax
 ; X86-NEXT:    movl {{[0-9]+}}(%esp), %ecx
 ; X86-NEXT:    movl (%ecx), %edx
 ; X86-NEXT:    movl 4(%ecx), %esi
 ; X86-NEXT:    xorl (%eax), %edx
 ; X86-NEXT:    xorl 4(%eax), %esi
 ; X86-NEXT:    orl %edx, %esi
 ; X86-NEXT:    movl 8(%ecx), %ecx
 ; X86-NEXT:    xorl 8(%eax), %ecx
 ; X86-NEXT:    orl %esi, %ecx
 ; X86-NEXT:    setne %al
 ; X86-NEXT:    popl %esi
 ; X86-NEXT:    retl
 ;
 ; X64-LABEL: length12_eq:
 ; X64:       # %bb.0:
 ; X64-NEXT:    movq (%rdi), %rax
 ; X64-NEXT:    xorq (%rsi), %rax
 ; X64-NEXT:    movl 8(%rdi), %ecx
 ; X64-NEXT:    xorl 8(%rsi), %ecx
 ; X64-NEXT:    orq %rax, %rcx
 ; X64-NEXT:    setne %al
 ; X64-NEXT:    retq
   %m = tail call i32 @memcmp(i8* %X, i8* %Y, i64 12) nounwind
   %c = icmp ne i32 %m, 0
   ret i1 %c
 }

 define i32 @length12(i8* %X, i8* %Y) nounwind {
 ; X86-LABEL: length12:
 ; X86:       # %bb.0:
 ; X86-NEXT:    pushl %esi
 ; X86-NEXT:    movl {{[0-9]+}}(%esp), %eax
 ; X86-NEXT:    movl {{[0-9]+}}(%esp), %esi
 ; X86-NEXT:    movl (%esi), %ecx
 ; X86-NEXT:    movl (%eax), %edx
 ; X86-NEXT:    bswapl %ecx
 ; X86-NEXT:    bswapl %edx
 ; X86-NEXT:    cmpl %edx, %ecx
 ; X86-NEXT:    jne .LBB29_3
 ; X86-NEXT:  # %bb.1: # %loadbb1
 ; X86-NEXT:    movl 4(%esi), %ecx
 ; X86-NEXT:    movl 4(%eax), %edx
 ; X86-NEXT:    bswapl %ecx
 ; X86-NEXT:    bswapl %edx
 ; X86-NEXT:    cmpl %edx, %ecx
 ; X86-NEXT:    jne .LBB29_3
 ; X86-NEXT:  # %bb.2: # %loadbb2
 ; X86-NEXT:    movl 8(%esi), %ecx
 ; X86-NEXT:    movl 8(%eax), %edx
 ; X86-NEXT:    bswapl %ecx
 ; X86-NEXT:    bswapl %edx
 ; X86-NEXT:    xorl %eax, %eax
 ; X86-NEXT:    cmpl %edx, %ecx
 ; X86-NEXT:    je .LBB29_4
 ; X86-NEXT:  .LBB29_3: # %res_block
 ; X86-NEXT:    xorl %eax, %eax
 ; X86-NEXT:    cmpl %edx, %ecx
 ; X86-NEXT:    setae %al
 ; X86-NEXT:    leal -1(%eax,%eax), %eax
 ; X86-NEXT:  .LBB29_4: # %endblock
 ; X86-NEXT:    popl %esi
 ; X86-NEXT:    retl
 ;
 ; X64-LABEL: length12:
 ; X64:       # %bb.0:
 ; X64-NEXT:    movq (%rdi), %rcx
 ; X64-NEXT:    movq (%rsi), %rdx
 ; X64-NEXT:    bswapq %rcx
 ; X64-NEXT:    bswapq %rdx
 ; X64-NEXT:    cmpq %rdx, %rcx
 ; X64-NEXT:    jne .LBB29_2
 ; X64-NEXT:  # %bb.1: # %loadbb1
 ; X64-NEXT:    movl 8(%rdi), %ecx
 ; X64-NEXT:    movl 8(%rsi), %edx
 ; X64-NEXT:    bswapl %ecx
 ; X64-NEXT:    bswapl %edx
 ; X64-NEXT:    xorl %eax, %eax
 ; X64-NEXT:    cmpq %rdx, %rcx
 ; X64-NEXT:    je .LBB29_3
 ; X64-NEXT:  .LBB29_2: # %res_block
 ; X64-NEXT:    xorl %eax, %eax
 ; X64-NEXT:    cmpq %rdx, %rcx
 ; X64-NEXT:    setae %al
 ; X64-NEXT:    leal -1(%rax,%rax), %eax
 ; X64-NEXT:  .LBB29_3: # %endblock
 ; X64-NEXT:    retq
   %m = tail call i32 @memcmp(i8* %X, i8* %Y, i64 12) nounwind
   ret i32 %m
 }

 define i1 @length13_eq(i8* %X, i8* %Y) nounwind {
 ; X86-LABEL: length13_eq:
 ; X86:       # %bb.0:
 ; X86-NEXT:    pushl %esi
 ; X86-NEXT:    movl {{[0-9]+}}(%esp), %eax
 ; X86-NEXT:    movl {{[0-9]+}}(%esp), %ecx
 ; X86-NEXT:    movl (%ecx), %edx
 ; X86-NEXT:    movl 4(%ecx), %esi
 ; X86-NEXT:    xorl (%eax), %edx
 ; X86-NEXT:    xorl 4(%eax), %esi
 ; X86-NEXT:    orl %edx, %esi
 ; X86-NEXT:    movl 8(%ecx), %edx
 ; X86-NEXT:    xorl 8(%eax), %edx
 ; X86-NEXT:    movb 12(%ecx), %cl
 ; X86-NEXT:    xorb 12(%eax), %cl
 ; X86-NEXT:    movzbl %cl, %eax
 ; X86-NEXT:    orl %edx, %eax
 ; X86-NEXT:    orl %esi, %eax
 ; X86-NEXT:    sete %al
 ; X86-NEXT:    popl %esi
 ; X86-NEXT:    retl
 ;
 ; X64-LABEL: length13_eq:
 ; X64:       # %bb.0:
 ; X64-NEXT:    movq (%rdi), %rax
 ; X64-NEXT:    movq 5(%rdi), %rcx
 ; X64-NEXT:    xorq (%rsi), %rax
 ; X64-NEXT:    xorq 5(%rsi), %rcx
 ; X64-NEXT:    orq %rax, %rcx
 ; X64-NEXT:    sete %al
 ; X64-NEXT:    retq
   %m = tail call i32 @memcmp(i8* %X, i8* %Y, i64 13) nounwind
   %c = icmp eq i32 %m, 0
   ret i1 %c
 }

 define i1 @length14_eq(i8* %X, i8* %Y) nounwind {
 ; X86-LABEL: length14_eq:
 ; X86:       # %bb.0:
 ; X86-NEXT:    pushl %esi
 ; X86-NEXT:    movl {{[0-9]+}}(%esp), %eax
 ; X86-NEXT:    movl {{[0-9]+}}(%esp), %ecx
 ; X86-NEXT:    movl (%ecx), %edx
 ; X86-NEXT:    movl 4(%ecx), %esi
 ; X86-NEXT:    xorl (%eax), %edx
 ; X86-NEXT:    xorl 4(%eax), %esi
 ; X86-NEXT:    orl %edx, %esi
 ; X86-NEXT:    movl 8(%ecx), %edx
 ; X86-NEXT:    xorl 8(%eax), %edx
 ; X86-NEXT:    movzwl 12(%ecx), %ecx
 ; X86-NEXT:    xorw 12(%eax), %cx
 ; X86-NEXT:    movzwl %cx, %eax
 ; X86-NEXT:    orl %edx, %eax
 ; X86-NEXT:    orl %esi, %eax
 ; X86-NEXT:    sete %al
 ; X86-NEXT:    popl %esi
 ; X86-NEXT:    retl
 ;
 ; X64-LABEL: length14_eq:
 ; X64:       # %bb.0:
 ; X64-NEXT:    movq (%rdi), %rax
 ; X64-NEXT:    movq 6(%rdi), %rcx
 ; X64-NEXT:    xorq (%rsi), %rax
 ; X64-NEXT:    xorq 6(%rsi), %rcx
 ; X64-NEXT:    orq %rax, %rcx
 ; X64-NEXT:    sete %al
 ; X64-NEXT:    retq
   %m = tail call i32 @memcmp(i8* %X, i8* %Y, i64 14) nounwind
   %c = icmp eq i32 %m, 0
   ret i1 %c
 }

 define i1 @length15_eq(i8* %X, i8* %Y) nounwind {
 ; X86-LABEL: length15_eq:
 ; X86:       # %bb.0:
 ; X86-NEXT:    pushl %esi
 ; X86-NEXT:    movl {{[0-9]+}}(%esp), %eax
 ; X86-NEXT:    movl {{[0-9]+}}(%esp), %ecx
 ; X86-NEXT:    movl (%ecx), %edx
 ; X86-NEXT:    movl 4(%ecx), %esi
 ; X86-NEXT:    xorl (%eax), %edx
 ; X86-NEXT:    xorl 4(%eax), %esi
 ; X86-NEXT:    orl %edx, %esi
 ; X86-NEXT:    movl 8(%ecx), %edx
 ; X86-NEXT:    xorl 8(%eax), %edx
 ; X86-NEXT:    movl 11(%ecx), %ecx
 ; X86-NEXT:    xorl 11(%eax), %ecx
 ; X86-NEXT:    orl %edx, %ecx
 ; X86-NEXT:    orl %esi, %ecx
 ; X86-NEXT:    sete %al
 ; X86-NEXT:    popl %esi
 ; X86-NEXT:    retl
 ;
 ; X64-LABEL: length15_eq:
 ; X64:       # %bb.0:
 ; X64-NEXT:    movq (%rdi), %rax
 ; X64-NEXT:    movq 7(%rdi), %rcx
 ; X64-NEXT:    xorq (%rsi), %rax
 ; X64-NEXT:    xorq 7(%rsi), %rcx
 ; X64-NEXT:    orq %rax, %rcx
 ; X64-NEXT:    sete %al
 ; X64-NEXT:    retq
   %m = tail call i32 @memcmp(i8* %X, i8* %Y, i64 15) nounwind
   %c = icmp eq i32 %m, 0
   ret i1 %c
 }

 ; PR33329 - https://bugs.llvm.org/show_bug.cgi?id=33329

 define i32 @length16(i8* %X, i8* %Y) nounwind {
 ; X86-LABEL: length16:
 ; X86:       # %bb.0:
 ; X86-NEXT:    pushl %esi
 ; X86-NEXT:    movl {{[0-9]+}}(%esp), %eax
 ; X86-NEXT:    movl {{[0-9]+}}(%esp), %esi
 ; X86-NEXT:    movl (%esi), %ecx
 ; X86-NEXT:    movl (%eax), %edx
 ; X86-NEXT:    bswapl %ecx
 ; X86-NEXT:    bswapl %edx
 ; X86-NEXT:    cmpl %edx, %ecx
 ; X86-NEXT:    jne .LBB33_4
 ; X86-NEXT:  # %bb.1: # %loadbb1
 ; X86-NEXT:    movl 4(%esi), %ecx
 ; X86-NEXT:    movl 4(%eax), %edx
 ; X86-NEXT:    bswapl %ecx
 ; X86-NEXT:    bswapl %edx
 ; X86-NEXT:    cmpl %edx, %ecx
 ; X86-NEXT:    jne .LBB33_4
 ; X86-NEXT:  # %bb.2: # %loadbb2
 ; X86-NEXT:    movl 8(%esi), %ecx
 ; X86-NEXT:    movl 8(%eax), %edx
 ; X86-NEXT:    bswapl %ecx
 ; X86-NEXT:    bswapl %edx
 ; X86-NEXT:    cmpl %edx, %ecx
 ; X86-NEXT:    jne .LBB33_4
 ; X86-NEXT:  # %bb.3: # %loadbb3
 ; X86-NEXT:    movl 12(%esi), %ecx
 ; X86-NEXT:    movl 12(%eax), %edx
 ; X86-NEXT:    bswapl %ecx
 ; X86-NEXT:    bswapl %edx
 ; X86-NEXT:    xorl %eax, %eax
 ; X86-NEXT:    cmpl %edx, %ecx
 ; X86-NEXT:    je .LBB33_5
 ; X86-NEXT:  .LBB33_4: # %res_block
 ; X86-NEXT:    xorl %eax, %eax
 ; X86-NEXT:    cmpl %edx, %ecx
 ; X86-NEXT:    setae %al
 ; X86-NEXT:    leal -1(%eax,%eax), %eax
 ; X86-NEXT:  .LBB33_5: # %endblock
 ; X86-NEXT:    popl %esi
 ; X86-NEXT:    retl
 ;
 ; X64-LABEL: length16:
 ; X64:       # %bb.0:
 ; X64-NEXT:    movq (%rdi), %rcx
 ; X64-NEXT:    movq (%rsi), %rdx
 ; X64-NEXT:    bswapq %rcx
 ; X64-NEXT:    bswapq %rdx
 ; X64-NEXT:    cmpq %rdx, %rcx
 ; X64-NEXT:    jne .LBB33_2
 ; X64-NEXT:  # %bb.1: # %loadbb1
 ; X64-NEXT:    movq 8(%rdi), %rcx
 ; X64-NEXT:    movq 8(%rsi), %rdx
 ; X64-NEXT:    bswapq %rcx
 ; X64-NEXT:    bswapq %rdx
 ; X64-NEXT:    xorl %eax, %eax
 ; X64-NEXT:    cmpq %rdx, %rcx
 ; X64-NEXT:    je .LBB33_3
 ; X64-NEXT:  .LBB33_2: # %res_block
 ; X64-NEXT:    xorl %eax, %eax
 ; X64-NEXT:    cmpq %rdx, %rcx
 ; X64-NEXT:    setae %al
 ; X64-NEXT:    leal -1(%rax,%rax), %eax
 ; X64-NEXT:  .LBB33_3: # %endblock
 ; X64-NEXT:    retq
   %m = tail call i32 @memcmp(i8* %X, i8* %Y, i64 16) nounwind
   ret i32 %m
 }

 define i1 @length16_eq(i8* %x, i8* %y) nounwind {
 ; X86-NOSSE-LABEL: length16_eq:
 ; X86-NOSSE:       # %bb.0:
 ; X86-NOSSE-NEXT:    pushl %esi
 ; X86-NOSSE-NEXT:    movl {{[0-9]+}}(%esp), %eax
 ; X86-NOSSE-NEXT:    movl {{[0-9]+}}(%esp), %ecx
 ; X86-NOSSE-NEXT:    movl (%ecx), %edx
 ; X86-NOSSE-NEXT:    movl 4(%ecx), %esi
 ; X86-NOSSE-NEXT:    xorl (%eax), %edx
 ; X86-NOSSE-NEXT:    xorl 4(%eax), %esi
 ; X86-NOSSE-NEXT:    orl %edx, %esi
 ; X86-NOSSE-NEXT:    movl 8(%ecx), %edx
 ; X86-NOSSE-NEXT:    xorl 8(%eax), %edx
 ; X86-NOSSE-NEXT:    movl 12(%ecx), %ecx
 ; X86-NOSSE-NEXT:    xorl 12(%eax), %ecx
 ; X86-NOSSE-NEXT:    orl %edx, %ecx
 ; X86-NOSSE-NEXT:    orl %esi, %ecx
 ; X86-NOSSE-NEXT:    setne %al
 ; X86-NOSSE-NEXT:    popl %esi
 ; X86-NOSSE-NEXT:    retl
 ;
 ; X86-SSE1-LABEL: length16_eq:
 ; X86-SSE1:       # %bb.0:
 ; X86-SSE1-NEXT:    pushl %esi
 ; X86-SSE1-NEXT:    movl {{[0-9]+}}(%esp), %eax
 ; X86-SSE1-NEXT:    movl {{[0-9]+}}(%esp), %ecx
 ; X86-SSE1-NEXT:    movl (%ecx), %edx
 ; X86-SSE1-NEXT:    movl 4(%ecx), %esi
 ; X86-SSE1-NEXT:    xorl (%eax), %edx
 ; X86-SSE1-NEXT:    xorl 4(%eax), %esi
 ; X86-SSE1-NEXT:    orl %edx, %esi
 ; X86-SSE1-NEXT:    movl 8(%ecx), %edx
 ; X86-SSE1-NEXT:    xorl 8(%eax), %edx
 ; X86-SSE1-NEXT:    movl 12(%ecx), %ecx
 ; X86-SSE1-NEXT:    xorl 12(%eax), %ecx
 ; X86-SSE1-NEXT:    orl %edx, %ecx
 ; X86-SSE1-NEXT:    orl %esi, %ecx
 ; X86-SSE1-NEXT:    setne %al
 ; X86-SSE1-NEXT:    popl %esi
 ; X86-SSE1-NEXT:    retl
 ;
 ; X86-SSE2-LABEL: length16_eq:
 ; X86-SSE2:       # %bb.0:
 ; X86-SSE2-NEXT:    movl {{[0-9]+}}(%esp), %eax
 ; X86-SSE2-NEXT:    movl {{[0-9]+}}(%esp), %ecx
 ; X86-SSE2-NEXT:    movdqu (%ecx), %xmm0
 ; X86-SSE2-NEXT:    movdqu (%eax), %xmm1
 ; X86-SSE2-NEXT:    pcmpeqb %xmm0, %xmm1
 ; X86-SSE2-NEXT:    pmovmskb %xmm1, %eax
 ; X86-SSE2-NEXT:    cmpl $65535, %eax # imm = 0xFFFF
 ; X86-SSE2-NEXT:    setne %al
 ; X86-SSE2-NEXT:    retl
 ;
 ; X86-SSE41-LABEL: length16_eq:
 ; X86-SSE41:       # %bb.0:
 ; X86-SSE41-NEXT:    movl {{[0-9]+}}(%esp), %eax
 ; X86-SSE41-NEXT:    movl {{[0-9]+}}(%esp), %ecx
 ; X86-SSE41-NEXT:    movdqu (%ecx), %xmm0
 ; X86-SSE41-NEXT:    movdqu (%eax), %xmm1
 ; X86-SSE41-NEXT:    pxor %xmm0, %xmm1
 ; X86-SSE41-NEXT:    ptest %xmm1, %xmm1
 ; X86-SSE41-NEXT:    setne %al
 ; X86-SSE41-NEXT:    retl
 ;
 ; X64-SSE2-LABEL: length16_eq:
 ; X64-SSE2:       # %bb.0:
 ; X64-SSE2-NEXT:    movdqu (%rdi), %xmm0
 ; X64-SSE2-NEXT:    movdqu (%rsi), %xmm1
 ; X64-SSE2-NEXT:    pcmpeqb %xmm0, %xmm1
 ; X64-SSE2-NEXT:    pmovmskb %xmm1, %eax
 ; X64-SSE2-NEXT:    cmpl $65535, %eax # imm = 0xFFFF
 ; X64-SSE2-NEXT:    setne %al
 ; X64-SSE2-NEXT:    retq
 ;
 ; X64-SSE41-LABEL: length16_eq:
 ; X64-SSE41:       # %bb.0:
 ; X64-SSE41-NEXT:    movdqu (%rdi), %xmm0
 ; X64-SSE41-NEXT:    movdqu (%rsi), %xmm1
 ; X64-SSE41-NEXT:    pxor %xmm0, %xmm1
 ; X64-SSE41-NEXT:    ptest %xmm1, %xmm1
 ; X64-SSE41-NEXT:    setne %al
 ; X64-SSE41-NEXT:    retq
 ;
 ; X64-AVX-LABEL: length16_eq:
 ; X64-AVX:       # %bb.0:
 ; X64-AVX-NEXT:    vmovdqu (%rdi), %xmm0
 ; X64-AVX-NEXT:    vpxor (%rsi), %xmm0, %xmm0
 ; X64-AVX-NEXT:    vptest %xmm0, %xmm0
 ; X64-AVX-NEXT:    setne %al
 ; X64-AVX-NEXT:    retq
 ;
 ; X64-MIC-AVX-LABEL: length16_eq:
 ; X64-MIC-AVX:       # %bb.0:
 ; X64-MIC-AVX-NEXT:    vmovdqu (%rdi), %xmm0
 ; X64-MIC-AVX-NEXT:    vmovdqu (%rsi), %xmm1
 ; X64-MIC-AVX-NEXT:    vpcmpneqd %zmm1, %zmm0, %k0
 ; X64-MIC-AVX-NEXT:    kortestw %k0, %k0
 ; X64-MIC-AVX-NEXT:    setne %al
 ; X64-MIC-AVX-NEXT:    vzeroupper
 ; X64-MIC-AVX-NEXT:    retq
   %call = tail call i32 @memcmp(i8* %x, i8* %y, i64 16) nounwind
   %cmp = icmp ne i32 %call, 0
   ret i1 %cmp
 }

 define i1 @length16_lt(i8* %x, i8* %y) nounwind {
 ; X86-LABEL: length16_lt:
 ; X86:       # %bb.0:
 ; X86-NEXT:    pushl %esi
 ; X86-NEXT:    movl {{[0-9]+}}(%esp), %eax
 ; X86-NEXT:    movl {{[0-9]+}}(%esp), %esi
 ; X86-NEXT:    movl (%esi), %ecx
 ; X86-NEXT:    movl (%eax), %edx
 ; X86-NEXT:    bswapl %ecx
 ; X86-NEXT:    bswapl %edx
 ; X86-NEXT:    cmpl %edx, %ecx
 ; X86-NEXT:    jne .LBB35_4
 ; X86-NEXT:  # %bb.1: # %loadbb1
 ; X86-NEXT:    movl 4(%esi), %ecx
 ; X86-NEXT:    movl 4(%eax), %edx
 ; X86-NEXT:    bswapl %ecx
 ; X86-NEXT:    bswapl %edx
 ; X86-NEXT:    cmpl %edx, %ecx
 ; X86-NEXT:    jne .LBB35_4
 ; X86-NEXT:  # %bb.2: # %loadbb2
 ; X86-NEXT:    movl 8(%esi), %ecx
 ; X86-NEXT:    movl 8(%eax), %edx
 ; X86-NEXT:    bswapl %ecx
 ; X86-NEXT:    bswapl %edx
 ; X86-NEXT:    cmpl %edx, %ecx
 ; X86-NEXT:    jne .LBB35_4
 ; X86-NEXT:  # %bb.3: # %loadbb3
 ; X86-NEXT:    movl 12(%esi), %ecx
 ; X86-NEXT:    movl 12(%eax), %edx
 ; X86-NEXT:    bswapl %ecx
 ; X86-NEXT:    bswapl %edx
 ; X86-NEXT:    xorl %eax, %eax
 ; X86-NEXT:    cmpl %edx, %ecx
 ; X86-NEXT:    je .LBB35_5
 ; X86-NEXT:  .LBB35_4: # %res_block
 ; X86-NEXT:    xorl %eax, %eax
 ; X86-NEXT:    cmpl %edx, %ecx
 ; X86-NEXT:    setae %al
 ; X86-NEXT:    leal -1(%eax,%eax), %eax
 ; X86-NEXT:  .LBB35_5: # %endblock
 ; X86-NEXT:    shrl $31, %eax
 ; X86-NEXT:    # kill: def $al killed $al killed $eax
 ; X86-NEXT:    popl %esi
 ; X86-NEXT:    retl
 ;
 ; X64-LABEL: length16_lt:
 ; X64:       # %bb.0:
 ; X64-NEXT:    movq (%rdi), %rcx
 ; X64-NEXT:    movq (%rsi), %rdx
 ; X64-NEXT:    bswapq %rcx
 ; X64-NEXT:    bswapq %rdx
 ; X64-NEXT:    cmpq %rdx, %rcx
 ; X64-NEXT:    jne .LBB35_2
 ; X64-NEXT:  # %bb.1: # %loadbb1
 ; X64-NEXT:    movq 8(%rdi), %rcx
 ; X64-NEXT:    movq 8(%rsi), %rdx
 ; X64-NEXT:    bswapq %rcx
 ; X64-NEXT:    bswapq %rdx
 ; X64-NEXT:    xorl %eax, %eax
 ; X64-NEXT:    cmpq %rdx, %rcx
 ; X64-NEXT:    je .LBB35_3
 ; X64-NEXT:  .LBB35_2: # %res_block
 ; X64-NEXT:    xorl %eax, %eax
 ; X64-NEXT:    cmpq %rdx, %rcx
 ; X64-NEXT:    setae %al
 ; X64-NEXT:    leal -1(%rax,%rax), %eax
 ; X64-NEXT:  .LBB35_3: # %endblock
 ; X64-NEXT:    shrl $31, %eax
 ; X64-NEXT:    # kill: def $al killed $al killed $eax
 ; X64-NEXT:    retq
   %call = tail call i32 @memcmp(i8* %x, i8* %y, i64 16) nounwind
   %cmp = icmp slt i32 %call, 0
   ret i1 %cmp
 }

 define i1 @length16_gt(i8* %x, i8* %y) nounwind {
 ; X86-LABEL: length16_gt:
 ; X86:       # %bb.0:
 ; X86-NEXT:    pushl %esi
 ; X86-NEXT:    movl {{[0-9]+}}(%esp), %edx
 ; X86-NEXT:    movl {{[0-9]+}}(%esp), %esi
 ; X86-NEXT:    movl (%esi), %eax
 ; X86-NEXT:    movl (%edx), %ecx
 ; X86-NEXT:    bswapl %eax
 ; X86-NEXT:    bswapl %ecx
 ; X86-NEXT:    cmpl %ecx, %eax
 ; X86-NEXT:    jne .LBB36_4
 ; X86-NEXT:  # %bb.1: # %loadbb1
 ; X86-NEXT:    movl 4(%esi), %eax
 ; X86-NEXT:    movl 4(%edx), %ecx
 ; X86-NEXT:    bswapl %eax
 ; X86-NEXT:    bswapl %ecx
 ; X86-NEXT:    cmpl %ecx, %eax
 ; X86-NEXT:    jne .LBB36_4
 ; X86-NEXT:  # %bb.2: # %loadbb2
 ; X86-NEXT:    movl 8(%esi), %eax
 ; X86-NEXT:    movl 8(%edx), %ecx
 ; X86-NEXT:    bswapl %eax
 ; X86-NEXT:    bswapl %ecx
 ; X86-NEXT:    cmpl %ecx, %eax
 ; X86-NEXT:    jne .LBB36_4
 ; X86-NEXT:  # %bb.3: # %loadbb3
 ; X86-NEXT:    movl 12(%esi), %eax
 ; X86-NEXT:    movl 12(%edx), %ecx
 ; X86-NEXT:    bswapl %eax
 ; X86-NEXT:    bswapl %ecx
 ; X86-NEXT:    xorl %edx, %edx
 ; X86-NEXT:    cmpl %ecx, %eax
 ; X86-NEXT:    je .LBB36_5
 ; X86-NEXT:  .LBB36_4: # %res_block
 ; X86-NEXT:    xorl %edx, %edx
 ; X86-NEXT:    cmpl %ecx, %eax
 ; X86-NEXT:    setae %dl
 ; X86-NEXT:    leal -1(%edx,%edx), %edx
 ; X86-NEXT:  .LBB36_5: # %endblock
 ; X86-NEXT:    testl %edx, %edx
 ; X86-NEXT:    setg %al
 ; X86-NEXT:    popl %esi
 ; X86-NEXT:    retl
 ;
 ; X64-LABEL: length16_gt:
 ; X64:       # %bb.0:
 ; X64-NEXT:    movq (%rdi), %rax
 ; X64-NEXT:    movq (%rsi), %rcx
 ; X64-NEXT:    bswapq %rax
 ; X64-NEXT:    bswapq %rcx
 ; X64-NEXT:    cmpq %rcx, %rax
 ; X64-NEXT:    jne .LBB36_2
 ; X64-NEXT:  # %bb.1: # %loadbb1
 ; X64-NEXT:    movq 8(%rdi), %rax
 ; X64-NEXT:    movq 8(%rsi), %rcx
 ; X64-NEXT:    bswapq %rax
 ; X64-NEXT:    bswapq %rcx
 ; X64-NEXT:    xorl %edx, %edx
 ; X64-NEXT:    cmpq %rcx, %rax
 ; X64-NEXT:    je .LBB36_3
 ; X64-NEXT:  .LBB36_2: # %res_block
 ; X64-NEXT:    xorl %edx, %edx
 ; X64-NEXT:    cmpq %rcx, %rax
 ; X64-NEXT:    setae %dl
 ; X64-NEXT:    leal -1(%rdx,%rdx), %edx
 ; X64-NEXT:  .LBB36_3: # %endblock
 ; X64-NEXT:    testl %edx, %edx
 ; X64-NEXT:    setg %al
 ; X64-NEXT:    retq
   %call = tail call i32 @memcmp(i8* %x, i8* %y, i64 16) nounwind
   %cmp = icmp sgt i32 %call, 0
   ret i1 %cmp
 }

 define i1 @length16_eq_const(i8* %X) nounwind {
 ; X86-NOSSE-LABEL: length16_eq_const:
 ; X86-NOSSE:       # %bb.0:
 ; X86-NOSSE-NEXT:    pushl %esi
 ; X86-NOSSE-NEXT:    movl {{[0-9]+}}(%esp), %eax
 ; X86-NOSSE-NEXT:    movl $858927408, %ecx # imm = 0x33323130
 ; X86-NOSSE-NEXT:    xorl (%eax), %ecx
 ; X86-NOSSE-NEXT:    movl $926299444, %edx # imm = 0x37363534
 ; X86-NOSSE-NEXT:    xorl 4(%eax), %edx
 ; X86-NOSSE-NEXT:    orl %ecx, %edx
 ; X86-NOSSE-NEXT:    movl $825243960, %ecx # imm = 0x31303938
 ; X86-NOSSE-NEXT:    xorl 8(%eax), %ecx
 ; X86-NOSSE-NEXT:    movl $892613426, %esi # imm = 0x35343332
 ; X86-NOSSE-NEXT:    xorl 12(%eax), %esi
 ; X86-NOSSE-NEXT:    orl %ecx, %esi
 ; X86-NOSSE-NEXT:    orl %edx, %esi
 ; X86-NOSSE-NEXT:    sete %al
 ; X86-NOSSE-NEXT:    popl %esi
 ; X86-NOSSE-NEXT:    retl
 ;
 ; X86-SSE1-LABEL: length16_eq_const:
 ; X86-SSE1:       # %bb.0:
 ; X86-SSE1-NEXT:    pushl %esi
 ; X86-SSE1-NEXT:    movl {{[0-9]+}}(%esp), %eax
 ; X86-SSE1-NEXT:    movl $858927408, %ecx # imm = 0x33323130
 ; X86-SSE1-NEXT:    xorl (%eax), %ecx
 ; X86-SSE1-NEXT:    movl $926299444, %edx # imm = 0x37363534
 ; X86-SSE1-NEXT:    xorl 4(%eax), %edx
 ; X86-SSE1-NEXT:    orl %ecx, %edx
 ; X86-SSE1-NEXT:    movl $825243960, %ecx # imm = 0x31303938
 ; X86-SSE1-NEXT:    xorl 8(%eax), %ecx
 ; X86-SSE1-NEXT:    movl $892613426, %esi # imm = 0x35343332
 ; X86-SSE1-NEXT:    xorl 12(%eax), %esi
 ; X86-SSE1-NEXT:    orl %ecx, %esi
 ; X86-SSE1-NEXT:    orl %edx, %esi
 ; X86-SSE1-NEXT:    sete %al
 ; X86-SSE1-NEXT:    popl %esi
 ; X86-SSE1-NEXT:    retl
 ;
 ; X86-SSE2-LABEL: length16_eq_const:
 ; X86-SSE2:       # %bb.0:
 ; X86-SSE2-NEXT:    movl {{[0-9]+}}(%esp), %eax
 ; X86-SSE2-NEXT:    movdqu (%eax), %xmm0
 ; X86-SSE2-NEXT:    pcmpeqb {{\.LCPI.*}}, %xmm0
 ; X86-SSE2-NEXT:    pmovmskb %xmm0, %eax
 ; X86-SSE2-NEXT:    cmpl $65535, %eax # imm = 0xFFFF
 ; X86-SSE2-NEXT:    sete %al
 ; X86-SSE2-NEXT:    retl
 ;
 ; X86-SSE41-LABEL: length16_eq_const:
 ; X86-SSE41:       # %bb.0:
 ; X86-SSE41-NEXT:    movl {{[0-9]+}}(%esp), %eax
 ; X86-SSE41-NEXT:    movdqu (%eax), %xmm0
 ; X86-SSE41-NEXT:    pxor {{\.LCPI.*}}, %xmm0
 ; X86-SSE41-NEXT:    ptest %xmm0, %xmm0
 ; X86-SSE41-NEXT:    sete %al
 ; X86-SSE41-NEXT:    retl
 ;
 ; X64-SSE2-LABEL: length16_eq_const:
 ; X64-SSE2:       # %bb.0:
 ; X64-SSE2-NEXT:    movdqu (%rdi), %xmm0
 ; X64-SSE2-NEXT:    pcmpeqb {{.*}}(%rip), %xmm0
 ; X64-SSE2-NEXT:    pmovmskb %xmm0, %eax
 ; X64-SSE2-NEXT:    cmpl $65535, %eax # imm = 0xFFFF
 ; X64-SSE2-NEXT:    sete %al
 ; X64-SSE2-NEXT:    retq
 ;
 ; X64-SSE41-LABEL: length16_eq_const:
 ; X64-SSE41:       # %bb.0:
 ; X64-SSE41-NEXT:    movdqu (%rdi), %xmm0
 ; X64-SSE41-NEXT:    pxor {{.*}}(%rip), %xmm0
 ; X64-SSE41-NEXT:    ptest %xmm0, %xmm0
 ; X64-SSE41-NEXT:    sete %al
 ; X64-SSE41-NEXT:    retq
 ;
 ; X64-AVX-LABEL: length16_eq_const:
 ; X64-AVX:       # %bb.0:
 ; X64-AVX-NEXT:    vmovdqu (%rdi), %xmm0
 ; X64-AVX-NEXT:    vpxor {{.*}}(%rip), %xmm0, %xmm0
 ; X64-AVX-NEXT:    vptest %xmm0, %xmm0
 ; X64-AVX-NEXT:    sete %al
 ; X64-AVX-NEXT:    retq
 ;
 ; X64-MIC-AVX-LABEL: length16_eq_const:
 ; X64-MIC-AVX:       # %bb.0:
 ; X64-MIC-AVX-NEXT:    vmovdqu (%rdi), %xmm0
 ; X64-MIC-AVX-NEXT:    vmovdqa {{.*#+}} xmm1 = [858927408,926299444,825243960,892613426]
 ; X64-MIC-AVX-NEXT:    vpcmpneqd %zmm1, %zmm0, %k0
 ; X64-MIC-AVX-NEXT:    kortestw %k0, %k0
 ; X64-MIC-AVX-NEXT:    sete %al
 ; X64-MIC-AVX-NEXT:    vzeroupper
 ; X64-MIC-AVX-NEXT:    retq
   %m = tail call i32 @memcmp(i8* %X, i8* getelementptr inbounds ([513 x i8], [513 x i8]* @.str, i32 0, i32 0), i64 16) nounwind
   %c = icmp eq i32 %m, 0
   ret i1 %c
 }

 ; PR33914 - https://bugs.llvm.org/show_bug.cgi?id=33914

 define i32 @length24(i8* %X, i8* %Y) nounwind {
 ; X86-LABEL: length24:
 ; X86:       # %bb.0:
 ; X86-NEXT:    pushl $0
 ; X86-NEXT:    pushl $24
 ; X86-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NEXT:    calll memcmp
 ; X86-NEXT:    addl $16, %esp
 ; X86-NEXT:    retl
 ;
 ; X64-LABEL: length24:
 ; X64:       # %bb.0:
 ; X64-NEXT:    movq (%rdi), %rcx
 ; X64-NEXT:    movq (%rsi), %rdx
 ; X64-NEXT:    bswapq %rcx
 ; X64-NEXT:    bswapq %rdx
 ; X64-NEXT:    cmpq %rdx, %rcx
 ; X64-NEXT:    jne .LBB38_3
 ; X64-NEXT:  # %bb.1: # %loadbb1
 ; X64-NEXT:    movq 8(%rdi), %rcx
 ; X64-NEXT:    movq 8(%rsi), %rdx
 ; X64-NEXT:    bswapq %rcx
 ; X64-NEXT:    bswapq %rdx
 ; X64-NEXT:    cmpq %rdx, %rcx
 ; X64-NEXT:    jne .LBB38_3
 ; X64-NEXT:  # %bb.2: # %loadbb2
 ; X64-NEXT:    movq 16(%rdi), %rcx
 ; X64-NEXT:    movq 16(%rsi), %rdx
 ; X64-NEXT:    bswapq %rcx
 ; X64-NEXT:    bswapq %rdx
 ; X64-NEXT:    xorl %eax, %eax
 ; X64-NEXT:    cmpq %rdx, %rcx
 ; X64-NEXT:    je .LBB38_4
 ; X64-NEXT:  .LBB38_3: # %res_block
 ; X64-NEXT:    xorl %eax, %eax
 ; X64-NEXT:    cmpq %rdx, %rcx
 ; X64-NEXT:    setae %al
 ; X64-NEXT:    leal -1(%rax,%rax), %eax
 ; X64-NEXT:  .LBB38_4: # %endblock
 ; X64-NEXT:    retq
   %m = tail call i32 @memcmp(i8* %X, i8* %Y, i64 24) nounwind
   ret i32 %m
 }

 define i1 @length24_eq(i8* %x, i8* %y) nounwind {
 ; X86-NOSSE-LABEL: length24_eq:
 ; X86-NOSSE:       # %bb.0:
 ; X86-NOSSE-NEXT:    pushl $0
 ; X86-NOSSE-NEXT:    pushl $24
 ; X86-NOSSE-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NOSSE-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NOSSE-NEXT:    calll memcmp
 ; X86-NOSSE-NEXT:    addl $16, %esp
 ; X86-NOSSE-NEXT:    testl %eax, %eax
 ; X86-NOSSE-NEXT:    sete %al
 ; X86-NOSSE-NEXT:    retl
 ;
 ; X86-SSE1-LABEL: length24_eq:
 ; X86-SSE1:       # %bb.0:
 ; X86-SSE1-NEXT:    pushl $0
 ; X86-SSE1-NEXT:    pushl $24
 ; X86-SSE1-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-SSE1-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-SSE1-NEXT:    calll memcmp
 ; X86-SSE1-NEXT:    addl $16, %esp
 ; X86-SSE1-NEXT:    testl %eax, %eax
 ; X86-SSE1-NEXT:    sete %al
 ; X86-SSE1-NEXT:    retl
 ;
 ; X86-SSE2-LABEL: length24_eq:
 ; X86-SSE2:       # %bb.0:
 ; X86-SSE2-NEXT:    movl {{[0-9]+}}(%esp), %eax
 ; X86-SSE2-NEXT:    movl {{[0-9]+}}(%esp), %ecx
 ; X86-SSE2-NEXT:    movdqu (%ecx), %xmm0
 ; X86-SSE2-NEXT:    movdqu 8(%ecx), %xmm1
 ; X86-SSE2-NEXT:    movdqu (%eax), %xmm2
 ; X86-SSE2-NEXT:    pcmpeqb %xmm0, %xmm2
 ; X86-SSE2-NEXT:    movdqu 8(%eax), %xmm0
 ; X86-SSE2-NEXT:    pcmpeqb %xmm1, %xmm0
 ; X86-SSE2-NEXT:    pand %xmm2, %xmm0
 ; X86-SSE2-NEXT:    pmovmskb %xmm0, %eax
 ; X86-SSE2-NEXT:    cmpl $65535, %eax # imm = 0xFFFF
 ; X86-SSE2-NEXT:    sete %al
 ; X86-SSE2-NEXT:    retl
 ;
 ; X86-SSE41-LABEL: length24_eq:
 ; X86-SSE41:       # %bb.0:
 ; X86-SSE41-NEXT:    movl {{[0-9]+}}(%esp), %eax
 ; X86-SSE41-NEXT:    movl {{[0-9]+}}(%esp), %ecx
 ; X86-SSE41-NEXT:    movdqu (%ecx), %xmm0
 ; X86-SSE41-NEXT:    movdqu 8(%ecx), %xmm1
 ; X86-SSE41-NEXT:    movdqu (%eax), %xmm2
 ; X86-SSE41-NEXT:    pxor %xmm0, %xmm2
 ; X86-SSE41-NEXT:    movdqu 8(%eax), %xmm0
 ; X86-SSE41-NEXT:    pxor %xmm1, %xmm0
 ; X86-SSE41-NEXT:    por %xmm2, %xmm0
 ; X86-SSE41-NEXT:    ptest %xmm0, %xmm0
 ; X86-SSE41-NEXT:    sete %al
 ; X86-SSE41-NEXT:    retl
 ;
 ; X64-SSE2-LABEL: length24_eq:
 ; X64-SSE2:       # %bb.0:
 ; X64-SSE2-NEXT:    movdqu (%rdi), %xmm0
 ; X64-SSE2-NEXT:    movdqu (%rsi), %xmm1
 ; X64-SSE2-NEXT:    pcmpeqb %xmm0, %xmm1
 ; X64-SSE2-NEXT:    movq {{.*#+}} xmm0 = mem[0],zero
 ; X64-SSE2-NEXT:    movq {{.*#+}} xmm2 = mem[0],zero
 ; X64-SSE2-NEXT:    pcmpeqb %xmm0, %xmm2
 ; X64-SSE2-NEXT:    pand %xmm1, %xmm2
 ; X64-SSE2-NEXT:    pmovmskb %xmm2, %eax
 ; X64-SSE2-NEXT:    cmpl $65535, %eax # imm = 0xFFFF
 ; X64-SSE2-NEXT:    sete %al
 ; X64-SSE2-NEXT:    retq
 ;
 ; X64-SSE41-LABEL: length24_eq:
 ; X64-SSE41:       # %bb.0:
 ; X64-SSE41-NEXT:    movdqu (%rdi), %xmm0
 ; X64-SSE41-NEXT:    movdqu (%rsi), %xmm1
 ; X64-SSE41-NEXT:    pxor %xmm0, %xmm1
 ; X64-SSE41-NEXT:    movq {{.*#+}} xmm0 = mem[0],zero
 ; X64-SSE41-NEXT:    movq {{.*#+}} xmm2 = mem[0],zero
 ; X64-SSE41-NEXT:    pxor %xmm0, %xmm2
 ; X64-SSE41-NEXT:    por %xmm1, %xmm2
 ; X64-SSE41-NEXT:    ptest %xmm2, %xmm2
 ; X64-SSE41-NEXT:    sete %al
 ; X64-SSE41-NEXT:    retq
 ;
 ; X64-AVX-LABEL: length24_eq:
 ; X64-AVX:       # %bb.0:
 ; X64-AVX-NEXT:    vmovdqu (%rdi), %xmm0
 ; X64-AVX-NEXT:    vmovq {{.*#+}} xmm1 = mem[0],zero
 ; X64-AVX-NEXT:    vmovq {{.*#+}} xmm2 = mem[0],zero
 ; X64-AVX-NEXT:    vpxor %xmm2, %xmm1, %xmm1
 ; X64-AVX-NEXT:    vpxor (%rsi), %xmm0, %xmm0
 ; X64-AVX-NEXT:    vpor %xmm1, %xmm0, %xmm0
 ; X64-AVX-NEXT:    vptest %xmm0, %xmm0
 ; X64-AVX-NEXT:    sete %al
 ; X64-AVX-NEXT:    retq
 ;
 ; X64-MIC-AVX-LABEL: length24_eq:
 ; X64-MIC-AVX:       # %bb.0:
 ; X64-MIC-AVX-NEXT:    vmovdqu (%rdi), %xmm0
 ; X64-MIC-AVX-NEXT:    vmovdqu (%rsi), %xmm1
 ; X64-MIC-AVX-NEXT:    vmovq {{.*#+}} xmm2 = mem[0],zero
 ; X64-MIC-AVX-NEXT:    vmovq {{.*#+}} xmm3 = mem[0],zero
 ; X64-MIC-AVX-NEXT:    vpcmpneqd %zmm3, %zmm2, %k0
 ; X64-MIC-AVX-NEXT:    vpcmpneqd %zmm1, %zmm0, %k1
 ; X64-MIC-AVX-NEXT:    kortestw %k0, %k1
 ; X64-MIC-AVX-NEXT:    sete %al
 ; X64-MIC-AVX-NEXT:    vzeroupper
 ; X64-MIC-AVX-NEXT:    retq
   %call = tail call i32 @memcmp(i8* %x, i8* %y, i64 24) nounwind
   %cmp = icmp eq i32 %call, 0
   ret i1 %cmp
 }

 define i1 @length24_lt(i8* %x, i8* %y) nounwind {
 ; X86-LABEL: length24_lt:
 ; X86:       # %bb.0:
 ; X86-NEXT:    pushl $0
 ; X86-NEXT:    pushl $24
 ; X86-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NEXT:    calll memcmp
 ; X86-NEXT:    addl $16, %esp
 ; X86-NEXT:    shrl $31, %eax
 ; X86-NEXT:    # kill: def $al killed $al killed $eax
 ; X86-NEXT:    retl
 ;
 ; X64-LABEL: length24_lt:
 ; X64:       # %bb.0:
 ; X64-NEXT:    movq (%rdi), %rcx
 ; X64-NEXT:    movq (%rsi), %rdx
 ; X64-NEXT:    bswapq %rcx
 ; X64-NEXT:    bswapq %rdx
 ; X64-NEXT:    cmpq %rdx, %rcx
 ; X64-NEXT:    jne .LBB40_3
 ; X64-NEXT:  # %bb.1: # %loadbb1
 ; X64-NEXT:    movq 8(%rdi), %rcx
 ; X64-NEXT:    movq 8(%rsi), %rdx
 ; X64-NEXT:    bswapq %rcx
 ; X64-NEXT:    bswapq %rdx
 ; X64-NEXT:    cmpq %rdx, %rcx
 ; X64-NEXT:    jne .LBB40_3
 ; X64-NEXT:  # %bb.2: # %loadbb2
 ; X64-NEXT:    movq 16(%rdi), %rcx
 ; X64-NEXT:    movq 16(%rsi), %rdx
 ; X64-NEXT:    bswapq %rcx
 ; X64-NEXT:    bswapq %rdx
 ; X64-NEXT:    xorl %eax, %eax
 ; X64-NEXT:    cmpq %rdx, %rcx
 ; X64-NEXT:    je .LBB40_4
 ; X64-NEXT:  .LBB40_3: # %res_block
 ; X64-NEXT:    xorl %eax, %eax
 ; X64-NEXT:    cmpq %rdx, %rcx
 ; X64-NEXT:    setae %al
 ; X64-NEXT:    leal -1(%rax,%rax), %eax
 ; X64-NEXT:  .LBB40_4: # %endblock
 ; X64-NEXT:    shrl $31, %eax
 ; X64-NEXT:    # kill: def $al killed $al killed $eax
 ; X64-NEXT:    retq
   %call = tail call i32 @memcmp(i8* %x, i8* %y, i64 24) nounwind
   %cmp = icmp slt i32 %call, 0
   ret i1 %cmp
 }

 define i1 @length24_gt(i8* %x, i8* %y) nounwind {
 ; X86-LABEL: length24_gt:
 ; X86:       # %bb.0:
 ; X86-NEXT:    pushl $0
 ; X86-NEXT:    pushl $24
 ; X86-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NEXT:    calll memcmp
 ; X86-NEXT:    addl $16, %esp
 ; X86-NEXT:    testl %eax, %eax
 ; X86-NEXT:    setg %al
 ; X86-NEXT:    retl
 ;
 ; X64-LABEL: length24_gt:
 ; X64:       # %bb.0:
 ; X64-NEXT:    movq (%rdi), %rax
 ; X64-NEXT:    movq (%rsi), %rcx
 ; X64-NEXT:    bswapq %rax
 ; X64-NEXT:    bswapq %rcx
 ; X64-NEXT:    cmpq %rcx, %rax
 ; X64-NEXT:    jne .LBB41_3
 ; X64-NEXT:  # %bb.1: # %loadbb1
 ; X64-NEXT:    movq 8(%rdi), %rax
 ; X64-NEXT:    movq 8(%rsi), %rcx
 ; X64-NEXT:    bswapq %rax
 ; X64-NEXT:    bswapq %rcx
 ; X64-NEXT:    cmpq %rcx, %rax
 ; X64-NEXT:    jne .LBB41_3
 ; X64-NEXT:  # %bb.2: # %loadbb2
 ; X64-NEXT:    movq 16(%rdi), %rax
 ; X64-NEXT:    movq 16(%rsi), %rcx
 ; X64-NEXT:    bswapq %rax
 ; X64-NEXT:    bswapq %rcx
 ; X64-NEXT:    xorl %edx, %edx
 ; X64-NEXT:    cmpq %rcx, %rax
 ; X64-NEXT:    je .LBB41_4
 ; X64-NEXT:  .LBB41_3: # %res_block
 ; X64-NEXT:    xorl %edx, %edx
 ; X64-NEXT:    cmpq %rcx, %rax
 ; X64-NEXT:    setae %dl
 ; X64-NEXT:    leal -1(%rdx,%rdx), %edx
 ; X64-NEXT:  .LBB41_4: # %endblock
 ; X64-NEXT:    testl %edx, %edx
 ; X64-NEXT:    setg %al
 ; X64-NEXT:    retq
   %call = tail call i32 @memcmp(i8* %x, i8* %y, i64 24) nounwind
   %cmp = icmp sgt i32 %call, 0
   ret i1 %cmp
 }

 define i1 @length24_eq_const(i8* %X) nounwind {
 ; X86-NOSSE-LABEL: length24_eq_const:
 ; X86-NOSSE:       # %bb.0:
 ; X86-NOSSE-NEXT:    pushl $0
 ; X86-NOSSE-NEXT:    pushl $24
 ; X86-NOSSE-NEXT:    pushl $.L.str
 ; X86-NOSSE-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NOSSE-NEXT:    calll memcmp
 ; X86-NOSSE-NEXT:    addl $16, %esp
 ; X86-NOSSE-NEXT:    testl %eax, %eax
 ; X86-NOSSE-NEXT:    setne %al
 ; X86-NOSSE-NEXT:    retl
 ;
 ; X86-SSE1-LABEL: length24_eq_const:
 ; X86-SSE1:       # %bb.0:
 ; X86-SSE1-NEXT:    pushl $0
 ; X86-SSE1-NEXT:    pushl $24
 ; X86-SSE1-NEXT:    pushl $.L.str
 ; X86-SSE1-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-SSE1-NEXT:    calll memcmp
 ; X86-SSE1-NEXT:    addl $16, %esp
 ; X86-SSE1-NEXT:    testl %eax, %eax
 ; X86-SSE1-NEXT:    setne %al
 ; X86-SSE1-NEXT:    retl
 ;
 ; X86-SSE2-LABEL: length24_eq_const:
 ; X86-SSE2:       # %bb.0:
 ; X86-SSE2-NEXT:    movl {{[0-9]+}}(%esp), %eax
 ; X86-SSE2-NEXT:    movdqu (%eax), %xmm0
 ; X86-SSE2-NEXT:    movdqu 8(%eax), %xmm1
 ; X86-SSE2-NEXT:    pcmpeqb {{\.LCPI.*}}, %xmm1
 ; X86-SSE2-NEXT:    pcmpeqb {{\.LCPI.*}}, %xmm0
 ; X86-SSE2-NEXT:    pand %xmm1, %xmm0
 ; X86-SSE2-NEXT:    pmovmskb %xmm0, %eax
 ; X86-SSE2-NEXT:    cmpl $65535, %eax # imm = 0xFFFF
 ; X86-SSE2-NEXT:    setne %al
 ; X86-SSE2-NEXT:    retl
 ;
 ; X86-SSE41-LABEL: length24_eq_const:
 ; X86-SSE41:       # %bb.0:
 ; X86-SSE41-NEXT:    movl {{[0-9]+}}(%esp), %eax
 ; X86-SSE41-NEXT:    movdqu (%eax), %xmm0
 ; X86-SSE41-NEXT:    movdqu 8(%eax), %xmm1
 ; X86-SSE41-NEXT:    pxor {{\.LCPI.*}}, %xmm1
 ; X86-SSE41-NEXT:    pxor {{\.LCPI.*}}, %xmm0
 ; X86-SSE41-NEXT:    por %xmm1, %xmm0
 ; X86-SSE41-NEXT:    ptest %xmm0, %xmm0
 ; X86-SSE41-NEXT:    setne %al
 ; X86-SSE41-NEXT:    retl
 ;
 ; X64-SSE2-LABEL: length24_eq_const:
 ; X64-SSE2:       # %bb.0:
 ; X64-SSE2-NEXT:    movdqu (%rdi), %xmm0
 ; X64-SSE2-NEXT:    movq {{.*#+}} xmm1 = mem[0],zero
 ; X64-SSE2-NEXT:    pcmpeqb {{.*}}(%rip), %xmm1
 ; X64-SSE2-NEXT:    pcmpeqb {{.*}}(%rip), %xmm0
 ; X64-SSE2-NEXT:    pand %xmm1, %xmm0
 ; X64-SSE2-NEXT:    pmovmskb %xmm0, %eax
 ; X64-SSE2-NEXT:    cmpl $65535, %eax # imm = 0xFFFF
 ; X64-SSE2-NEXT:    setne %al
 ; X64-SSE2-NEXT:    retq
 ;
 ; X64-SSE41-LABEL: length24_eq_const:
 ; X64-SSE41:       # %bb.0:
 ; X64-SSE41-NEXT:    movdqu (%rdi), %xmm0
 ; X64-SSE41-NEXT:    movq {{.*#+}} xmm1 = mem[0],zero
 ; X64-SSE41-NEXT:    pxor {{.*}}(%rip), %xmm1
 ; X64-SSE41-NEXT:    pxor {{.*}}(%rip), %xmm0
 ; X64-SSE41-NEXT:    por %xmm1, %xmm0
 ; X64-SSE41-NEXT:    ptest %xmm0, %xmm0
 ; X64-SSE41-NEXT:    setne %al
 ; X64-SSE41-NEXT:    retq
 ;
 ; X64-AVX-LABEL: length24_eq_const:
 ; X64-AVX:       # %bb.0:
 ; X64-AVX-NEXT:    vmovdqu (%rdi), %xmm0
 ; X64-AVX-NEXT:    vmovq {{.*#+}} xmm1 = mem[0],zero
 ; X64-AVX-NEXT:    vpxor {{.*}}(%rip), %xmm1, %xmm1
 ; X64-AVX-NEXT:    vpxor {{.*}}(%rip), %xmm0, %xmm0
 ; X64-AVX-NEXT:    vpor %xmm1, %xmm0, %xmm0
 ; X64-AVX-NEXT:    vptest %xmm0, %xmm0
 ; X64-AVX-NEXT:    setne %al
 ; X64-AVX-NEXT:    retq
 ;
 ; X64-MIC-AVX-LABEL: length24_eq_const:
 ; X64-MIC-AVX:       # %bb.0:
 ; X64-MIC-AVX-NEXT:    vmovdqu (%rdi), %xmm0
 ; X64-MIC-AVX-NEXT:    vmovq {{.*#+}} xmm1 = mem[0],zero
 ; X64-MIC-AVX-NEXT:    vmovdqa {{.*#+}} xmm2 = [959985462,858927408,0,0]
 ; X64-MIC-AVX-NEXT:    vpcmpneqd %zmm2, %zmm1, %k0
 ; X64-MIC-AVX-NEXT:    vmovdqa {{.*#+}} xmm1 = [858927408,926299444,825243960,892613426]
 ; X64-MIC-AVX-NEXT:    vpcmpneqd %zmm1, %zmm0, %k1
 ; X64-MIC-AVX-NEXT:    kortestw %k0, %k1
 ; X64-MIC-AVX-NEXT:    setne %al
 ; X64-MIC-AVX-NEXT:    vzeroupper
 ; X64-MIC-AVX-NEXT:    retq
   %m = tail call i32 @memcmp(i8* %X, i8* getelementptr inbounds ([513 x i8], [513 x i8]* @.str, i32 0, i32 0), i64 24) nounwind
   %c = icmp ne i32 %m, 0
   ret i1 %c
 }

 define i32 @length31(i8* %X, i8* %Y) nounwind {
 ; X86-LABEL: length31:
 ; X86:       # %bb.0:
 ; X86-NEXT:    pushl $0
 ; X86-NEXT:    pushl $31
 ; X86-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NEXT:    calll memcmp
 ; X86-NEXT:    addl $16, %esp
 ; X86-NEXT:    retl
 ;
 ; X64-LABEL: length31:
 ; X64:       # %bb.0:
 ; X64-NEXT:    movq (%rdi), %rcx
 ; X64-NEXT:    movq (%rsi), %rdx
 ; X64-NEXT:    bswapq %rcx
 ; X64-NEXT:    bswapq %rdx
 ; X64-NEXT:    cmpq %rdx, %rcx
 ; X64-NEXT:    jne .LBB43_4
 ; X64-NEXT:  # %bb.1: # %loadbb1
 ; X64-NEXT:    movq 8(%rdi), %rcx
 ; X64-NEXT:    movq 8(%rsi), %rdx
 ; X64-NEXT:    bswapq %rcx
 ; X64-NEXT:    bswapq %rdx
 ; X64-NEXT:    cmpq %rdx, %rcx
 ; X64-NEXT:    jne .LBB43_4
 ; X64-NEXT:  # %bb.2: # %loadbb2
 ; X64-NEXT:    movq 16(%rdi), %rcx
 ; X64-NEXT:    movq 16(%rsi), %rdx
 ; X64-NEXT:    bswapq %rcx
 ; X64-NEXT:    bswapq %rdx
 ; X64-NEXT:    cmpq %rdx, %rcx
 ; X64-NEXT:    jne .LBB43_4
 ; X64-NEXT:  # %bb.3: # %loadbb3
 ; X64-NEXT:    movq 23(%rdi), %rcx
 ; X64-NEXT:    movq 23(%rsi), %rdx
 ; X64-NEXT:    bswapq %rcx
 ; X64-NEXT:    bswapq %rdx
 ; X64-NEXT:    xorl %eax, %eax
 ; X64-NEXT:    cmpq %rdx, %rcx
 ; X64-NEXT:    je .LBB43_5
 ; X64-NEXT:  .LBB43_4: # %res_block
 ; X64-NEXT:    xorl %eax, %eax
 ; X64-NEXT:    cmpq %rdx, %rcx
 ; X64-NEXT:    setae %al
 ; X64-NEXT:    leal -1(%rax,%rax), %eax
 ; X64-NEXT:  .LBB43_5: # %endblock
 ; X64-NEXT:    retq
   %m = tail call i32 @memcmp(i8* %X, i8* %Y, i64 31) nounwind
   ret i32 %m
 }

 define i1 @length31_eq(i8* %x, i8* %y) nounwind {
 ; X86-NOSSE-LABEL: length31_eq:
 ; X86-NOSSE:       # %bb.0:
 ; X86-NOSSE-NEXT:    pushl $0
 ; X86-NOSSE-NEXT:    pushl $31
 ; X86-NOSSE-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NOSSE-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NOSSE-NEXT:    calll memcmp
 ; X86-NOSSE-NEXT:    addl $16, %esp
 ; X86-NOSSE-NEXT:    testl %eax, %eax
 ; X86-NOSSE-NEXT:    sete %al
 ; X86-NOSSE-NEXT:    retl
 ;
 ; X86-SSE1-LABEL: length31_eq:
 ; X86-SSE1:       # %bb.0:
 ; X86-SSE1-NEXT:    pushl $0
 ; X86-SSE1-NEXT:    pushl $31
 ; X86-SSE1-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-SSE1-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-SSE1-NEXT:    calll memcmp
 ; X86-SSE1-NEXT:    addl $16, %esp
 ; X86-SSE1-NEXT:    testl %eax, %eax
 ; X86-SSE1-NEXT:    sete %al
 ; X86-SSE1-NEXT:    retl
 ;
 ; X86-SSE2-LABEL: length31_eq:
 ; X86-SSE2:       # %bb.0:
 ; X86-SSE2-NEXT:    movl {{[0-9]+}}(%esp), %eax
 ; X86-SSE2-NEXT:    movl {{[0-9]+}}(%esp), %ecx
 ; X86-SSE2-NEXT:    movdqu (%ecx), %xmm0
 ; X86-SSE2-NEXT:    movdqu 15(%ecx), %xmm1
 ; X86-SSE2-NEXT:    movdqu (%eax), %xmm2
 ; X86-SSE2-NEXT:    pcmpeqb %xmm0, %xmm2
 ; X86-SSE2-NEXT:    movdqu 15(%eax), %xmm0
 ; X86-SSE2-NEXT:    pcmpeqb %xmm1, %xmm0
 ; X86-SSE2-NEXT:    pand %xmm2, %xmm0
 ; X86-SSE2-NEXT:    pmovmskb %xmm0, %eax
 ; X86-SSE2-NEXT:    cmpl $65535, %eax # imm = 0xFFFF
 ; X86-SSE2-NEXT:    sete %al
 ; X86-SSE2-NEXT:    retl
 ;
 ; X86-SSE41-LABEL: length31_eq:
 ; X86-SSE41:       # %bb.0:
 ; X86-SSE41-NEXT:    movl {{[0-9]+}}(%esp), %eax
 ; X86-SSE41-NEXT:    movl {{[0-9]+}}(%esp), %ecx
 ; X86-SSE41-NEXT:    movdqu (%ecx), %xmm0
 ; X86-SSE41-NEXT:    movdqu 15(%ecx), %xmm1
 ; X86-SSE41-NEXT:    movdqu (%eax), %xmm2
 ; X86-SSE41-NEXT:    pxor %xmm0, %xmm2
 ; X86-SSE41-NEXT:    movdqu 15(%eax), %xmm0
 ; X86-SSE41-NEXT:    pxor %xmm1, %xmm0
 ; X86-SSE41-NEXT:    por %xmm2, %xmm0
 ; X86-SSE41-NEXT:    ptest %xmm0, %xmm0
 ; X86-SSE41-NEXT:    sete %al
 ; X86-SSE41-NEXT:    retl
 ;
 ; X64-SSE2-LABEL: length31_eq:
 ; X64-SSE2:       # %bb.0:
 ; X64-SSE2-NEXT:    movdqu (%rdi), %xmm0
 ; X64-SSE2-NEXT:    movdqu 15(%rdi), %xmm1
 ; X64-SSE2-NEXT:    movdqu (%rsi), %xmm2
 ; X64-SSE2-NEXT:    pcmpeqb %xmm0, %xmm2
 ; X64-SSE2-NEXT:    movdqu 15(%rsi), %xmm0
 ; X64-SSE2-NEXT:    pcmpeqb %xmm1, %xmm0
 ; X64-SSE2-NEXT:    pand %xmm2, %xmm0
 ; X64-SSE2-NEXT:    pmovmskb %xmm0, %eax
 ; X64-SSE2-NEXT:    cmpl $65535, %eax # imm = 0xFFFF
 ; X64-SSE2-NEXT:    sete %al
 ; X64-SSE2-NEXT:    retq
 ;
 ; X64-SSE41-LABEL: length31_eq:
 ; X64-SSE41:       # %bb.0:
 ; X64-SSE41-NEXT:    movdqu (%rdi), %xmm0
 ; X64-SSE41-NEXT:    movdqu 15(%rdi), %xmm1
 ; X64-SSE41-NEXT:    movdqu (%rsi), %xmm2
 ; X64-SSE41-NEXT:    pxor %xmm0, %xmm2
 ; X64-SSE41-NEXT:    movdqu 15(%rsi), %xmm0
 ; X64-SSE41-NEXT:    pxor %xmm1, %xmm0
 ; X64-SSE41-NEXT:    por %xmm2, %xmm0
 ; X64-SSE41-NEXT:    ptest %xmm0, %xmm0
 ; X64-SSE41-NEXT:    sete %al
 ; X64-SSE41-NEXT:    retq
 ;
 ; X64-AVX-LABEL: length31_eq:
 ; X64-AVX:       # %bb.0:
 ; X64-AVX-NEXT:    vmovdqu (%rdi), %xmm0
 ; X64-AVX-NEXT:    vmovdqu 15(%rdi), %xmm1
 ; X64-AVX-NEXT:    vpxor 15(%rsi), %xmm1, %xmm1
 ; X64-AVX-NEXT:    vpxor (%rsi), %xmm0, %xmm0
 ; X64-AVX-NEXT:    vpor %xmm1, %xmm0, %xmm0
 ; X64-AVX-NEXT:    vptest %xmm0, %xmm0
 ; X64-AVX-NEXT:    sete %al
 ; X64-AVX-NEXT:    retq
 ;
 ; X64-MIC-AVX-LABEL: length31_eq:
 ; X64-MIC-AVX:       # %bb.0:
 ; X64-MIC-AVX-NEXT:    vmovdqu (%rdi), %xmm0
 ; X64-MIC-AVX-NEXT:    vmovdqu 15(%rdi), %xmm1
 ; X64-MIC-AVX-NEXT:    vmovdqu (%rsi), %xmm2
 ; X64-MIC-AVX-NEXT:    vmovdqu 15(%rsi), %xmm3
 ; X64-MIC-AVX-NEXT:    vpcmpneqd %zmm3, %zmm1, %k0
 ; X64-MIC-AVX-NEXT:    vpcmpneqd %zmm2, %zmm0, %k1
 ; X64-MIC-AVX-NEXT:    kortestw %k0, %k1
 ; X64-MIC-AVX-NEXT:    sete %al
 ; X64-MIC-AVX-NEXT:    vzeroupper
 ; X64-MIC-AVX-NEXT:    retq
   %call = tail call i32 @memcmp(i8* %x, i8* %y, i64 31) nounwind
   %cmp = icmp eq i32 %call, 0
   ret i1 %cmp
 }

 define i1 @length31_lt(i8* %x, i8* %y) nounwind {
 ; X86-LABEL: length31_lt:
 ; X86:       # %bb.0:
 ; X86-NEXT:    pushl $0
 ; X86-NEXT:    pushl $31
 ; X86-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NEXT:    calll memcmp
 ; X86-NEXT:    addl $16, %esp
 ; X86-NEXT:    shrl $31, %eax
 ; X86-NEXT:    # kill: def $al killed $al killed $eax
 ; X86-NEXT:    retl
 ;
 ; X64-LABEL: length31_lt:
 ; X64:       # %bb.0:
 ; X64-NEXT:    movq (%rdi), %rcx
 ; X64-NEXT:    movq (%rsi), %rdx
 ; X64-NEXT:    bswapq %rcx
 ; X64-NEXT:    bswapq %rdx
 ; X64-NEXT:    cmpq %rdx, %rcx
 ; X64-NEXT:    jne .LBB45_4
 ; X64-NEXT:  # %bb.1: # %loadbb1
 ; X64-NEXT:    movq 8(%rdi), %rcx
 ; X64-NEXT:    movq 8(%rsi), %rdx
 ; X64-NEXT:    bswapq %rcx
 ; X64-NEXT:    bswapq %rdx
 ; X64-NEXT:    cmpq %rdx, %rcx
 ; X64-NEXT:    jne .LBB45_4
 ; X64-NEXT:  # %bb.2: # %loadbb2
 ; X64-NEXT:    movq 16(%rdi), %rcx
 ; X64-NEXT:    movq 16(%rsi), %rdx
 ; X64-NEXT:    bswapq %rcx
 ; X64-NEXT:    bswapq %rdx
 ; X64-NEXT:    cmpq %rdx, %rcx
 ; X64-NEXT:    jne .LBB45_4
 ; X64-NEXT:  # %bb.3: # %loadbb3
 ; X64-NEXT:    movq 23(%rdi), %rcx
 ; X64-NEXT:    movq 23(%rsi), %rdx
 ; X64-NEXT:    bswapq %rcx
 ; X64-NEXT:    bswapq %rdx
 ; X64-NEXT:    xorl %eax, %eax
 ; X64-NEXT:    cmpq %rdx, %rcx
 ; X64-NEXT:    je .LBB45_5
 ; X64-NEXT:  .LBB45_4: # %res_block
 ; X64-NEXT:    xorl %eax, %eax
 ; X64-NEXT:    cmpq %rdx, %rcx
 ; X64-NEXT:    setae %al
 ; X64-NEXT:    leal -1(%rax,%rax), %eax
 ; X64-NEXT:  .LBB45_5: # %endblock
 ; X64-NEXT:    shrl $31, %eax
 ; X64-NEXT:    # kill: def $al killed $al killed $eax
 ; X64-NEXT:    retq
   %call = tail call i32 @memcmp(i8* %x, i8* %y, i64 31) nounwind
   %cmp = icmp slt i32 %call, 0
   ret i1 %cmp
 }

 define i1 @length31_gt(i8* %x, i8* %y) nounwind {
 ; X86-LABEL: length31_gt:
 ; X86:       # %bb.0:
 ; X86-NEXT:    pushl $0
 ; X86-NEXT:    pushl $31
 ; X86-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NEXT:    calll memcmp
 ; X86-NEXT:    addl $16, %esp
 ; X86-NEXT:    testl %eax, %eax
 ; X86-NEXT:    setg %al
 ; X86-NEXT:    retl
 ;
 ; X64-LABEL: length31_gt:
 ; X64:       # %bb.0:
 ; X64-NEXT:    movq (%rdi), %rax
 ; X64-NEXT:    movq (%rsi), %rcx
 ; X64-NEXT:    bswapq %rax
 ; X64-NEXT:    bswapq %rcx
 ; X64-NEXT:    cmpq %rcx, %rax
 ; X64-NEXT:    jne .LBB46_4
 ; X64-NEXT:  # %bb.1: # %loadbb1
 ; X64-NEXT:    movq 8(%rdi), %rax
 ; X64-NEXT:    movq 8(%rsi), %rcx
 ; X64-NEXT:    bswapq %rax
 ; X64-NEXT:    bswapq %rcx
 ; X64-NEXT:    cmpq %rcx, %rax
 ; X64-NEXT:    jne .LBB46_4
 ; X64-NEXT:  # %bb.2: # %loadbb2
 ; X64-NEXT:    movq 16(%rdi), %rax
 ; X64-NEXT:    movq 16(%rsi), %rcx
 ; X64-NEXT:    bswapq %rax
 ; X64-NEXT:    bswapq %rcx
 ; X64-NEXT:    cmpq %rcx, %rax
 ; X64-NEXT:    jne .LBB46_4
 ; X64-NEXT:  # %bb.3: # %loadbb3
 ; X64-NEXT:    movq 23(%rdi), %rax
 ; X64-NEXT:    movq 23(%rsi), %rcx
 ; X64-NEXT:    bswapq %rax
 ; X64-NEXT:    bswapq %rcx
 ; X64-NEXT:    xorl %edx, %edx
 ; X64-NEXT:    cmpq %rcx, %rax
 ; X64-NEXT:    je .LBB46_5
 ; X64-NEXT:  .LBB46_4: # %res_block
 ; X64-NEXT:    xorl %edx, %edx
 ; X64-NEXT:    cmpq %rcx, %rax
 ; X64-NEXT:    setae %dl
 ; X64-NEXT:    leal -1(%rdx,%rdx), %edx
 ; X64-NEXT:  .LBB46_5: # %endblock
 ; X64-NEXT:    testl %edx, %edx
 ; X64-NEXT:    setg %al
 ; X64-NEXT:    retq
   %call = tail call i32 @memcmp(i8* %x, i8* %y, i64 31) nounwind
   %cmp = icmp sgt i32 %call, 0
   ret i1 %cmp
 }

 define i1 @length31_eq_prefer128(i8* %x, i8* %y) nounwind "prefer-vector-width"="128" {
 ; X86-NOSSE-LABEL: length31_eq_prefer128:
 ; X86-NOSSE:       # %bb.0:
 ; X86-NOSSE-NEXT:    pushl $0
 ; X86-NOSSE-NEXT:    pushl $31
 ; X86-NOSSE-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NOSSE-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NOSSE-NEXT:    calll memcmp
 ; X86-NOSSE-NEXT:    addl $16, %esp
 ; X86-NOSSE-NEXT:    testl %eax, %eax
 ; X86-NOSSE-NEXT:    sete %al
 ; X86-NOSSE-NEXT:    retl
 ;
 ; X86-SSE1-LABEL: length31_eq_prefer128:
 ; X86-SSE1:       # %bb.0:
 ; X86-SSE1-NEXT:    pushl $0
 ; X86-SSE1-NEXT:    pushl $31
 ; X86-SSE1-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-SSE1-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-SSE1-NEXT:    calll memcmp
 ; X86-SSE1-NEXT:    addl $16, %esp
 ; X86-SSE1-NEXT:    testl %eax, %eax
 ; X86-SSE1-NEXT:    sete %al
 ; X86-SSE1-NEXT:    retl
 ;
 ; X86-SSE2-LABEL: length31_eq_prefer128:
 ; X86-SSE2:       # %bb.0:
 ; X86-SSE2-NEXT:    movl {{[0-9]+}}(%esp), %eax
 ; X86-SSE2-NEXT:    movl {{[0-9]+}}(%esp), %ecx
 ; X86-SSE2-NEXT:    movdqu (%ecx), %xmm0
 ; X86-SSE2-NEXT:    movdqu 15(%ecx), %xmm1
 ; X86-SSE2-NEXT:    movdqu (%eax), %xmm2
 ; X86-SSE2-NEXT:    pcmpeqb %xmm0, %xmm2
 ; X86-SSE2-NEXT:    movdqu 15(%eax), %xmm0
 ; X86-SSE2-NEXT:    pcmpeqb %xmm1, %xmm0
 ; X86-SSE2-NEXT:    pand %xmm2, %xmm0
 ; X86-SSE2-NEXT:    pmovmskb %xmm0, %eax
 ; X86-SSE2-NEXT:    cmpl $65535, %eax # imm = 0xFFFF
 ; X86-SSE2-NEXT:    sete %al
 ; X86-SSE2-NEXT:    retl
 ;
 ; X86-SSE41-LABEL: length31_eq_prefer128:
 ; X86-SSE41:       # %bb.0:
 ; X86-SSE41-NEXT:    movl {{[0-9]+}}(%esp), %eax
 ; X86-SSE41-NEXT:    movl {{[0-9]+}}(%esp), %ecx
 ; X86-SSE41-NEXT:    movdqu (%ecx), %xmm0
 ; X86-SSE41-NEXT:    movdqu 15(%ecx), %xmm1
 ; X86-SSE41-NEXT:    movdqu (%eax), %xmm2
 ; X86-SSE41-NEXT:    pxor %xmm0, %xmm2
 ; X86-SSE41-NEXT:    movdqu 15(%eax), %xmm0
 ; X86-SSE41-NEXT:    pxor %xmm1, %xmm0
 ; X86-SSE41-NEXT:    por %xmm2, %xmm0
 ; X86-SSE41-NEXT:    ptest %xmm0, %xmm0
 ; X86-SSE41-NEXT:    sete %al
 ; X86-SSE41-NEXT:    retl
 ;
 ; X64-SSE2-LABEL: length31_eq_prefer128:
 ; X64-SSE2:       # %bb.0:
 ; X64-SSE2-NEXT:    movdqu (%rdi), %xmm0
 ; X64-SSE2-NEXT:    movdqu 15(%rdi), %xmm1
 ; X64-SSE2-NEXT:    movdqu (%rsi), %xmm2
 ; X64-SSE2-NEXT:    pcmpeqb %xmm0, %xmm2
 ; X64-SSE2-NEXT:    movdqu 15(%rsi), %xmm0
 ; X64-SSE2-NEXT:    pcmpeqb %xmm1, %xmm0
 ; X64-SSE2-NEXT:    pand %xmm2, %xmm0
 ; X64-SSE2-NEXT:    pmovmskb %xmm0, %eax
 ; X64-SSE2-NEXT:    cmpl $65535, %eax # imm = 0xFFFF
 ; X64-SSE2-NEXT:    sete %al
 ; X64-SSE2-NEXT:    retq
 ;
 ; X64-SSE41-LABEL: length31_eq_prefer128:
 ; X64-SSE41:       # %bb.0:
 ; X64-SSE41-NEXT:    movdqu (%rdi), %xmm0
 ; X64-SSE41-NEXT:    movdqu 15(%rdi), %xmm1
 ; X64-SSE41-NEXT:    movdqu (%rsi), %xmm2
 ; X64-SSE41-NEXT:    pxor %xmm0, %xmm2
 ; X64-SSE41-NEXT:    movdqu 15(%rsi), %xmm0
 ; X64-SSE41-NEXT:    pxor %xmm1, %xmm0
 ; X64-SSE41-NEXT:    por %xmm2, %xmm0
 ; X64-SSE41-NEXT:    ptest %xmm0, %xmm0
 ; X64-SSE41-NEXT:    sete %al
 ; X64-SSE41-NEXT:    retq
 ;
 ; X64-AVX-LABEL: length31_eq_prefer128:
 ; X64-AVX:       # %bb.0:
 ; X64-AVX-NEXT:    vmovdqu (%rdi), %xmm0
 ; X64-AVX-NEXT:    vmovdqu 15(%rdi), %xmm1
 ; X64-AVX-NEXT:    vpxor 15(%rsi), %xmm1, %xmm1
 ; X64-AVX-NEXT:    vpxor (%rsi), %xmm0, %xmm0
 ; X64-AVX-NEXT:    vpor %xmm1, %xmm0, %xmm0
 ; X64-AVX-NEXT:    vptest %xmm0, %xmm0
 ; X64-AVX-NEXT:    sete %al
 ; X64-AVX-NEXT:    retq
 ;
 ; X64-MIC-AVX-LABEL: length31_eq_prefer128:
 ; X64-MIC-AVX:       # %bb.0:
 ; X64-MIC-AVX-NEXT:    vmovdqu (%rdi), %xmm0
 ; X64-MIC-AVX-NEXT:    vmovdqu 15(%rdi), %xmm1
 ; X64-MIC-AVX-NEXT:    vmovdqu (%rsi), %xmm2
 ; X64-MIC-AVX-NEXT:    vmovdqu 15(%rsi), %xmm3
 ; X64-MIC-AVX-NEXT:    vpcmpneqd %zmm3, %zmm1, %k0
 ; X64-MIC-AVX-NEXT:    vpcmpneqd %zmm2, %zmm0, %k1
 ; X64-MIC-AVX-NEXT:    kortestw %k0, %k1
 ; X64-MIC-AVX-NEXT:    sete %al
 ; X64-MIC-AVX-NEXT:    vzeroupper
 ; X64-MIC-AVX-NEXT:    retq
   %call = tail call i32 @memcmp(i8* %x, i8* %y, i64 31) nounwind
   %cmp = icmp eq i32 %call, 0
   ret i1 %cmp
 }

 define i1 @length31_eq_const(i8* %X) nounwind {
 ; X86-NOSSE-LABEL: length31_eq_const:
 ; X86-NOSSE:       # %bb.0:
 ; X86-NOSSE-NEXT:    pushl $0
 ; X86-NOSSE-NEXT:    pushl $31
 ; X86-NOSSE-NEXT:    pushl $.L.str
 ; X86-NOSSE-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NOSSE-NEXT:    calll memcmp
 ; X86-NOSSE-NEXT:    addl $16, %esp
 ; X86-NOSSE-NEXT:    testl %eax, %eax
 ; X86-NOSSE-NEXT:    setne %al
 ; X86-NOSSE-NEXT:    retl
 ;
 ; X86-SSE1-LABEL: length31_eq_const:
 ; X86-SSE1:       # %bb.0:
 ; X86-SSE1-NEXT:    pushl $0
 ; X86-SSE1-NEXT:    pushl $31
 ; X86-SSE1-NEXT:    pushl $.L.str
 ; X86-SSE1-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-SSE1-NEXT:    calll memcmp
 ; X86-SSE1-NEXT:    addl $16, %esp
 ; X86-SSE1-NEXT:    testl %eax, %eax
 ; X86-SSE1-NEXT:    setne %al
 ; X86-SSE1-NEXT:    retl
 ;
 ; X86-SSE2-LABEL: length31_eq_const:
 ; X86-SSE2:       # %bb.0:
 ; X86-SSE2-NEXT:    movl {{[0-9]+}}(%esp), %eax
 ; X86-SSE2-NEXT:    movdqu (%eax), %xmm0
 ; X86-SSE2-NEXT:    movdqu 15(%eax), %xmm1
 ; X86-SSE2-NEXT:    pcmpeqb {{\.LCPI.*}}, %xmm1
 ; X86-SSE2-NEXT:    pcmpeqb {{\.LCPI.*}}, %xmm0
 ; X86-SSE2-NEXT:    pand %xmm1, %xmm0
 ; X86-SSE2-NEXT:    pmovmskb %xmm0, %eax
 ; X86-SSE2-NEXT:    cmpl $65535, %eax # imm = 0xFFFF
 ; X86-SSE2-NEXT:    setne %al
 ; X86-SSE2-NEXT:    retl
 ;
 ; X86-SSE41-LABEL: length31_eq_const:
 ; X86-SSE41:       # %bb.0:
 ; X86-SSE41-NEXT:    movl {{[0-9]+}}(%esp), %eax
 ; X86-SSE41-NEXT:    movdqu (%eax), %xmm0
 ; X86-SSE41-NEXT:    movdqu 15(%eax), %xmm1
 ; X86-SSE41-NEXT:    pxor {{\.LCPI.*}}, %xmm1
 ; X86-SSE41-NEXT:    pxor {{\.LCPI.*}}, %xmm0
 ; X86-SSE41-NEXT:    por %xmm1, %xmm0
 ; X86-SSE41-NEXT:    ptest %xmm0, %xmm0
 ; X86-SSE41-NEXT:    setne %al
 ; X86-SSE41-NEXT:    retl
 ;
 ; X64-SSE2-LABEL: length31_eq_const:
 ; X64-SSE2:       # %bb.0:
 ; X64-SSE2-NEXT:    movdqu (%rdi), %xmm0
 ; X64-SSE2-NEXT:    movdqu 15(%rdi), %xmm1
 ; X64-SSE2-NEXT:    pcmpeqb {{.*}}(%rip), %xmm1
 ; X64-SSE2-NEXT:    pcmpeqb {{.*}}(%rip), %xmm0
 ; X64-SSE2-NEXT:    pand %xmm1, %xmm0
 ; X64-SSE2-NEXT:    pmovmskb %xmm0, %eax
 ; X64-SSE2-NEXT:    cmpl $65535, %eax # imm = 0xFFFF
 ; X64-SSE2-NEXT:    setne %al
 ; X64-SSE2-NEXT:    retq
 ;
 ; X64-SSE41-LABEL: length31_eq_const:
 ; X64-SSE41:       # %bb.0:
 ; X64-SSE41-NEXT:    movdqu (%rdi), %xmm0
 ; X64-SSE41-NEXT:    movdqu 15(%rdi), %xmm1
 ; X64-SSE41-NEXT:    pxor {{.*}}(%rip), %xmm1
 ; X64-SSE41-NEXT:    pxor {{.*}}(%rip), %xmm0
 ; X64-SSE41-NEXT:    por %xmm1, %xmm0
 ; X64-SSE41-NEXT:    ptest %xmm0, %xmm0
 ; X64-SSE41-NEXT:    setne %al
 ; X64-SSE41-NEXT:    retq
 ;
 ; X64-AVX-LABEL: length31_eq_const:
 ; X64-AVX:       # %bb.0:
 ; X64-AVX-NEXT:    vmovdqu (%rdi), %xmm0
 ; X64-AVX-NEXT:    vmovdqu 15(%rdi), %xmm1
 ; X64-AVX-NEXT:    vpxor {{.*}}(%rip), %xmm1, %xmm1
 ; X64-AVX-NEXT:    vpxor {{.*}}(%rip), %xmm0, %xmm0
 ; X64-AVX-NEXT:    vpor %xmm1, %xmm0, %xmm0
 ; X64-AVX-NEXT:    vptest %xmm0, %xmm0
 ; X64-AVX-NEXT:    setne %al
 ; X64-AVX-NEXT:    retq
 ;
 ; X64-MIC-AVX-LABEL: length31_eq_const:
 ; X64-MIC-AVX:       # %bb.0:
 ; X64-MIC-AVX-NEXT:    vmovdqu (%rdi), %xmm0
 ; X64-MIC-AVX-NEXT:    vmovdqu 15(%rdi), %xmm1
 ; X64-MIC-AVX-NEXT:    vmovdqa {{.*#+}} xmm2 = [943142453,842084409,909456435,809056311]
 ; X64-MIC-AVX-NEXT:    vpcmpneqd %zmm2, %zmm1, %k0
 ; X64-MIC-AVX-NEXT:    vmovdqa {{.*#+}} xmm1 = [858927408,926299444,825243960,892613426]
 ; X64-MIC-AVX-NEXT:    vpcmpneqd %zmm1, %zmm0, %k1
 ; X64-MIC-AVX-NEXT:    kortestw %k0, %k1
 ; X64-MIC-AVX-NEXT:    setne %al
 ; X64-MIC-AVX-NEXT:    vzeroupper
 ; X64-MIC-AVX-NEXT:    retq
   %m = tail call i32 @memcmp(i8* %X, i8* getelementptr inbounds ([513 x i8], [513 x i8]* @.str, i32 0, i32 0), i64 31) nounwind
   %c = icmp ne i32 %m, 0
   ret i1 %c
 }

 define i32 @length32(i8* %X, i8* %Y) nounwind {
 ; X86-LABEL: length32:
 ; X86:       # %bb.0:
 ; X86-NEXT:    pushl $0
 ; X86-NEXT:    pushl $32
 ; X86-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NEXT:    calll memcmp
 ; X86-NEXT:    addl $16, %esp
 ; X86-NEXT:    retl
 ;
 ; X64-LABEL: length32:
 ; X64:       # %bb.0:
 ; X64-NEXT:    movq (%rdi), %rcx
 ; X64-NEXT:    movq (%rsi), %rdx
 ; X64-NEXT:    bswapq %rcx
 ; X64-NEXT:    bswapq %rdx
 ; X64-NEXT:    cmpq %rdx, %rcx
 ; X64-NEXT:    jne .LBB49_4
 ; X64-NEXT:  # %bb.1: # %loadbb1
 ; X64-NEXT:    movq 8(%rdi), %rcx
 ; X64-NEXT:    movq 8(%rsi), %rdx
 ; X64-NEXT:    bswapq %rcx
 ; X64-NEXT:    bswapq %rdx
 ; X64-NEXT:    cmpq %rdx, %rcx
 ; X64-NEXT:    jne .LBB49_4
 ; X64-NEXT:  # %bb.2: # %loadbb2
 ; X64-NEXT:    movq 16(%rdi), %rcx
 ; X64-NEXT:    movq 16(%rsi), %rdx
 ; X64-NEXT:    bswapq %rcx
 ; X64-NEXT:    bswapq %rdx
 ; X64-NEXT:    cmpq %rdx, %rcx
 ; X64-NEXT:    jne .LBB49_4
 ; X64-NEXT:  # %bb.3: # %loadbb3
 ; X64-NEXT:    movq 24(%rdi), %rcx
 ; X64-NEXT:    movq 24(%rsi), %rdx
 ; X64-NEXT:    bswapq %rcx
 ; X64-NEXT:    bswapq %rdx
 ; X64-NEXT:    xorl %eax, %eax
 ; X64-NEXT:    cmpq %rdx, %rcx
 ; X64-NEXT:    je .LBB49_5
 ; X64-NEXT:  .LBB49_4: # %res_block
 ; X64-NEXT:    xorl %eax, %eax
 ; X64-NEXT:    cmpq %rdx, %rcx
 ; X64-NEXT:    setae %al
 ; X64-NEXT:    leal -1(%rax,%rax), %eax
 ; X64-NEXT:  .LBB49_5: # %endblock
 ; X64-NEXT:    retq
   %m = tail call i32 @memcmp(i8* %X, i8* %Y, i64 32) nounwind
   ret i32 %m
 }

 ; PR33325 - https://bugs.llvm.org/show_bug.cgi?id=33325

 define i1 @length32_eq(i8* %x, i8* %y) nounwind {
 ; X86-NOSSE-LABEL: length32_eq:
 ; X86-NOSSE:       # %bb.0:
 ; X86-NOSSE-NEXT:    pushl $0
 ; X86-NOSSE-NEXT:    pushl $32
 ; X86-NOSSE-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NOSSE-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NOSSE-NEXT:    calll memcmp
 ; X86-NOSSE-NEXT:    addl $16, %esp
 ; X86-NOSSE-NEXT:    testl %eax, %eax
 ; X86-NOSSE-NEXT:    sete %al
 ; X86-NOSSE-NEXT:    retl
 ;
 ; X86-SSE1-LABEL: length32_eq:
 ; X86-SSE1:       # %bb.0:
 ; X86-SSE1-NEXT:    pushl $0
 ; X86-SSE1-NEXT:    pushl $32
 ; X86-SSE1-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-SSE1-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-SSE1-NEXT:    calll memcmp
 ; X86-SSE1-NEXT:    addl $16, %esp
 ; X86-SSE1-NEXT:    testl %eax, %eax
 ; X86-SSE1-NEXT:    sete %al
 ; X86-SSE1-NEXT:    retl
 ;
 ; X86-SSE2-LABEL: length32_eq:
 ; X86-SSE2:       # %bb.0:
 ; X86-SSE2-NEXT:    movl {{[0-9]+}}(%esp), %eax
 ; X86-SSE2-NEXT:    movl {{[0-9]+}}(%esp), %ecx
 ; X86-SSE2-NEXT:    movdqu (%ecx), %xmm0
 ; X86-SSE2-NEXT:    movdqu 16(%ecx), %xmm1
 ; X86-SSE2-NEXT:    movdqu (%eax), %xmm2
 ; X86-SSE2-NEXT:    pcmpeqb %xmm0, %xmm2
 ; X86-SSE2-NEXT:    movdqu 16(%eax), %xmm0
 ; X86-SSE2-NEXT:    pcmpeqb %xmm1, %xmm0
 ; X86-SSE2-NEXT:    pand %xmm2, %xmm0
 ; X86-SSE2-NEXT:    pmovmskb %xmm0, %eax
 ; X86-SSE2-NEXT:    cmpl $65535, %eax # imm = 0xFFFF
 ; X86-SSE2-NEXT:    sete %al
 ; X86-SSE2-NEXT:    retl
 ;
 ; X86-SSE41-LABEL: length32_eq:
 ; X86-SSE41:       # %bb.0:
 ; X86-SSE41-NEXT:    movl {{[0-9]+}}(%esp), %eax
 ; X86-SSE41-NEXT:    movl {{[0-9]+}}(%esp), %ecx
 ; X86-SSE41-NEXT:    movdqu (%ecx), %xmm0
 ; X86-SSE41-NEXT:    movdqu 16(%ecx), %xmm1
 ; X86-SSE41-NEXT:    movdqu (%eax), %xmm2
 ; X86-SSE41-NEXT:    pxor %xmm0, %xmm2
 ; X86-SSE41-NEXT:    movdqu 16(%eax), %xmm0
 ; X86-SSE41-NEXT:    pxor %xmm1, %xmm0
 ; X86-SSE41-NEXT:    por %xmm2, %xmm0
 ; X86-SSE41-NEXT:    ptest %xmm0, %xmm0
 ; X86-SSE41-NEXT:    sete %al
 ; X86-SSE41-NEXT:    retl
 ;
 ; X64-SSE2-LABEL: length32_eq:
 ; X64-SSE2:       # %bb.0:
 ; X64-SSE2-NEXT:    movdqu (%rdi), %xmm0
 ; X64-SSE2-NEXT:    movdqu 16(%rdi), %xmm1
 ; X64-SSE2-NEXT:    movdqu (%rsi), %xmm2
 ; X64-SSE2-NEXT:    pcmpeqb %xmm0, %xmm2
 ; X64-SSE2-NEXT:    movdqu 16(%rsi), %xmm0
 ; X64-SSE2-NEXT:    pcmpeqb %xmm1, %xmm0
 ; X64-SSE2-NEXT:    pand %xmm2, %xmm0
 ; X64-SSE2-NEXT:    pmovmskb %xmm0, %eax
 ; X64-SSE2-NEXT:    cmpl $65535, %eax # imm = 0xFFFF
 ; X64-SSE2-NEXT:    sete %al
 ; X64-SSE2-NEXT:    retq
 ;
 ; X64-SSE41-LABEL: length32_eq:
 ; X64-SSE41:       # %bb.0:
 ; X64-SSE41-NEXT:    movdqu (%rdi), %xmm0
 ; X64-SSE41-NEXT:    movdqu 16(%rdi), %xmm1
 ; X64-SSE41-NEXT:    movdqu (%rsi), %xmm2
 ; X64-SSE41-NEXT:    pxor %xmm0, %xmm2
 ; X64-SSE41-NEXT:    movdqu 16(%rsi), %xmm0
 ; X64-SSE41-NEXT:    pxor %xmm1, %xmm0
 ; X64-SSE41-NEXT:    por %xmm2, %xmm0
 ; X64-SSE41-NEXT:    ptest %xmm0, %xmm0
 ; X64-SSE41-NEXT:    sete %al
 ; X64-SSE41-NEXT:    retq
 ;
 ; X64-AVX1-LABEL: length32_eq:
 ; X64-AVX1:       # %bb.0:
 ; X64-AVX1-NEXT:    vmovups (%rdi), %ymm0
 ; X64-AVX1-NEXT:    vxorps (%rsi), %ymm0, %ymm0
 ; X64-AVX1-NEXT:    vptest %ymm0, %ymm0
 ; X64-AVX1-NEXT:    sete %al
 ; X64-AVX1-NEXT:    vzeroupper
 ; X64-AVX1-NEXT:    retq
 ;
 ; X64-AVX2-LABEL: length32_eq:
 ; X64-AVX2:       # %bb.0:
 ; X64-AVX2-NEXT:    vmovdqu (%rdi), %ymm0
 ; X64-AVX2-NEXT:    vpxor (%rsi), %ymm0, %ymm0
 ; X64-AVX2-NEXT:    vptest %ymm0, %ymm0
 ; X64-AVX2-NEXT:    sete %al
 ; X64-AVX2-NEXT:    vzeroupper
 ; X64-AVX2-NEXT:    retq
 ;
 ; X64-AVX512-LABEL: length32_eq:
 ; X64-AVX512:       # %bb.0:
 ; X64-AVX512-NEXT:    vmovdqu (%rdi), %ymm0
 ; X64-AVX512-NEXT:    vpxor (%rsi), %ymm0, %ymm0
 ; X64-AVX512-NEXT:    vptest %ymm0, %ymm0
 ; X64-AVX512-NEXT:    sete %al
 ; X64-AVX512-NEXT:    vzeroupper
 ; X64-AVX512-NEXT:    retq
 ;
 ; X64-MIC-AVX-LABEL: length32_eq:
 ; X64-MIC-AVX:       # %bb.0:
 ; X64-MIC-AVX-NEXT:    vmovdqu (%rdi), %ymm0
 ; X64-MIC-AVX-NEXT:    vmovdqu (%rsi), %ymm1
 ; X64-MIC-AVX-NEXT:    vpcmpneqd %zmm1, %zmm0, %k0
 ; X64-MIC-AVX-NEXT:    kortestw %k0, %k0
 ; X64-MIC-AVX-NEXT:    sete %al
 ; X64-MIC-AVX-NEXT:    vzeroupper
 ; X64-MIC-AVX-NEXT:    retq
   %call = tail call i32 @memcmp(i8* %x, i8* %y, i64 32) nounwind
   %cmp = icmp eq i32 %call, 0
   ret i1 %cmp
 }

 define i1 @length32_lt(i8* %x, i8* %y) nounwind {
 ; X86-LABEL: length32_lt:
 ; X86:       # %bb.0:
 ; X86-NEXT:    pushl $0
 ; X86-NEXT:    pushl $32
 ; X86-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NEXT:    calll memcmp
 ; X86-NEXT:    addl $16, %esp
 ; X86-NEXT:    shrl $31, %eax
 ; X86-NEXT:    # kill: def $al killed $al killed $eax
 ; X86-NEXT:    retl
 ;
 ; X64-LABEL: length32_lt:
 ; X64:       # %bb.0:
 ; X64-NEXT:    movq (%rdi), %rcx
 ; X64-NEXT:    movq (%rsi), %rdx
 ; X64-NEXT:    bswapq %rcx
 ; X64-NEXT:    bswapq %rdx
 ; X64-NEXT:    cmpq %rdx, %rcx
 ; X64-NEXT:    jne .LBB51_4
 ; X64-NEXT:  # %bb.1: # %loadbb1
 ; X64-NEXT:    movq 8(%rdi), %rcx
 ; X64-NEXT:    movq 8(%rsi), %rdx
 ; X64-NEXT:    bswapq %rcx
 ; X64-NEXT:    bswapq %rdx
 ; X64-NEXT:    cmpq %rdx, %rcx
 ; X64-NEXT:    jne .LBB51_4
 ; X64-NEXT:  # %bb.2: # %loadbb2
 ; X64-NEXT:    movq 16(%rdi), %rcx
 ; X64-NEXT:    movq 16(%rsi), %rdx
 ; X64-NEXT:    bswapq %rcx
 ; X64-NEXT:    bswapq %rdx
 ; X64-NEXT:    cmpq %rdx, %rcx
 ; X64-NEXT:    jne .LBB51_4
 ; X64-NEXT:  # %bb.3: # %loadbb3
 ; X64-NEXT:    movq 24(%rdi), %rcx
 ; X64-NEXT:    movq 24(%rsi), %rdx
 ; X64-NEXT:    bswapq %rcx
 ; X64-NEXT:    bswapq %rdx
 ; X64-NEXT:    xorl %eax, %eax
 ; X64-NEXT:    cmpq %rdx, %rcx
 ; X64-NEXT:    je .LBB51_5
 ; X64-NEXT:  .LBB51_4: # %res_block
 ; X64-NEXT:    xorl %eax, %eax
 ; X64-NEXT:    cmpq %rdx, %rcx
 ; X64-NEXT:    setae %al
 ; X64-NEXT:    leal -1(%rax,%rax), %eax
 ; X64-NEXT:  .LBB51_5: # %endblock
 ; X64-NEXT:    shrl $31, %eax
 ; X64-NEXT:    # kill: def $al killed $al killed $eax
 ; X64-NEXT:    retq
   %call = tail call i32 @memcmp(i8* %x, i8* %y, i64 32) nounwind
   %cmp = icmp slt i32 %call, 0
   ret i1 %cmp
 }

 define i1 @length32_gt(i8* %x, i8* %y) nounwind {
 ; X86-LABEL: length32_gt:
 ; X86:       # %bb.0:
 ; X86-NEXT:    pushl $0
 ; X86-NEXT:    pushl $32
 ; X86-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NEXT:    calll memcmp
 ; X86-NEXT:    addl $16, %esp
 ; X86-NEXT:    testl %eax, %eax
 ; X86-NEXT:    setg %al
 ; X86-NEXT:    retl
 ;
 ; X64-LABEL: length32_gt:
 ; X64:       # %bb.0:
 ; X64-NEXT:    movq (%rdi), %rax
 ; X64-NEXT:    movq (%rsi), %rcx
 ; X64-NEXT:    bswapq %rax
 ; X64-NEXT:    bswapq %rcx
 ; X64-NEXT:    cmpq %rcx, %rax
 ; X64-NEXT:    jne .LBB52_4
 ; X64-NEXT:  # %bb.1: # %loadbb1
 ; X64-NEXT:    movq 8(%rdi), %rax
 ; X64-NEXT:    movq 8(%rsi), %rcx
 ; X64-NEXT:    bswapq %rax
 ; X64-NEXT:    bswapq %rcx
 ; X64-NEXT:    cmpq %rcx, %rax
 ; X64-NEXT:    jne .LBB52_4
 ; X64-NEXT:  # %bb.2: # %loadbb2
 ; X64-NEXT:    movq 16(%rdi), %rax
 ; X64-NEXT:    movq 16(%rsi), %rcx
 ; X64-NEXT:    bswapq %rax
 ; X64-NEXT:    bswapq %rcx
 ; X64-NEXT:    cmpq %rcx, %rax
 ; X64-NEXT:    jne .LBB52_4
 ; X64-NEXT:  # %bb.3: # %loadbb3
 ; X64-NEXT:    movq 24(%rdi), %rax
 ; X64-NEXT:    movq 24(%rsi), %rcx
 ; X64-NEXT:    bswapq %rax
 ; X64-NEXT:    bswapq %rcx
 ; X64-NEXT:    xorl %edx, %edx
 ; X64-NEXT:    cmpq %rcx, %rax
 ; X64-NEXT:    je .LBB52_5
 ; X64-NEXT:  .LBB52_4: # %res_block
 ; X64-NEXT:    xorl %edx, %edx
 ; X64-NEXT:    cmpq %rcx, %rax
 ; X64-NEXT:    setae %dl
 ; X64-NEXT:    leal -1(%rdx,%rdx), %edx
 ; X64-NEXT:  .LBB52_5: # %endblock
 ; X64-NEXT:    testl %edx, %edx
 ; X64-NEXT:    setg %al
 ; X64-NEXT:    retq
   %call = tail call i32 @memcmp(i8* %x, i8* %y, i64 32) nounwind
   %cmp = icmp sgt i32 %call, 0
   ret i1 %cmp
 }

 define i1 @length32_eq_prefer128(i8* %x, i8* %y) nounwind "prefer-vector-width"="128" {
 ; X86-NOSSE-LABEL: length32_eq_prefer128:
 ; X86-NOSSE:       # %bb.0:
 ; X86-NOSSE-NEXT:    pushl $0
 ; X86-NOSSE-NEXT:    pushl $32
 ; X86-NOSSE-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NOSSE-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NOSSE-NEXT:    calll memcmp
 ; X86-NOSSE-NEXT:    addl $16, %esp
 ; X86-NOSSE-NEXT:    testl %eax, %eax
 ; X86-NOSSE-NEXT:    sete %al
 ; X86-NOSSE-NEXT:    retl
 ;
 ; X86-SSE1-LABEL: length32_eq_prefer128:
 ; X86-SSE1:       # %bb.0:
 ; X86-SSE1-NEXT:    pushl $0
 ; X86-SSE1-NEXT:    pushl $32
 ; X86-SSE1-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-SSE1-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-SSE1-NEXT:    calll memcmp
 ; X86-SSE1-NEXT:    addl $16, %esp
 ; X86-SSE1-NEXT:    testl %eax, %eax
 ; X86-SSE1-NEXT:    sete %al
 ; X86-SSE1-NEXT:    retl
 ;
 ; X86-SSE2-LABEL: length32_eq_prefer128:
 ; X86-SSE2:       # %bb.0:
 ; X86-SSE2-NEXT:    movl {{[0-9]+}}(%esp), %eax
 ; X86-SSE2-NEXT:    movl {{[0-9]+}}(%esp), %ecx
 ; X86-SSE2-NEXT:    movdqu (%ecx), %xmm0
 ; X86-SSE2-NEXT:    movdqu 16(%ecx), %xmm1
 ; X86-SSE2-NEXT:    movdqu (%eax), %xmm2
 ; X86-SSE2-NEXT:    pcmpeqb %xmm0, %xmm2
 ; X86-SSE2-NEXT:    movdqu 16(%eax), %xmm0
 ; X86-SSE2-NEXT:    pcmpeqb %xmm1, %xmm0
 ; X86-SSE2-NEXT:    pand %xmm2, %xmm0
 ; X86-SSE2-NEXT:    pmovmskb %xmm0, %eax
 ; X86-SSE2-NEXT:    cmpl $65535, %eax # imm = 0xFFFF
 ; X86-SSE2-NEXT:    sete %al
 ; X86-SSE2-NEXT:    retl
 ;
 ; X86-SSE41-LABEL: length32_eq_prefer128:
 ; X86-SSE41:       # %bb.0:
 ; X86-SSE41-NEXT:    movl {{[0-9]+}}(%esp), %eax
 ; X86-SSE41-NEXT:    movl {{[0-9]+}}(%esp), %ecx
 ; X86-SSE41-NEXT:    movdqu (%ecx), %xmm0
 ; X86-SSE41-NEXT:    movdqu 16(%ecx), %xmm1
 ; X86-SSE41-NEXT:    movdqu (%eax), %xmm2
 ; X86-SSE41-NEXT:    pxor %xmm0, %xmm2
 ; X86-SSE41-NEXT:    movdqu 16(%eax), %xmm0
 ; X86-SSE41-NEXT:    pxor %xmm1, %xmm0
 ; X86-SSE41-NEXT:    por %xmm2, %xmm0
 ; X86-SSE41-NEXT:    ptest %xmm0, %xmm0
 ; X86-SSE41-NEXT:    sete %al
 ; X86-SSE41-NEXT:    retl
 ;
 ; X64-SSE2-LABEL: length32_eq_prefer128:
 ; X64-SSE2:       # %bb.0:
 ; X64-SSE2-NEXT:    movdqu (%rdi), %xmm0
 ; X64-SSE2-NEXT:    movdqu 16(%rdi), %xmm1
 ; X64-SSE2-NEXT:    movdqu (%rsi), %xmm2
 ; X64-SSE2-NEXT:    pcmpeqb %xmm0, %xmm2
 ; X64-SSE2-NEXT:    movdqu 16(%rsi), %xmm0
 ; X64-SSE2-NEXT:    pcmpeqb %xmm1, %xmm0
 ; X64-SSE2-NEXT:    pand %xmm2, %xmm0
 ; X64-SSE2-NEXT:    pmovmskb %xmm0, %eax
 ; X64-SSE2-NEXT:    cmpl $65535, %eax # imm = 0xFFFF
 ; X64-SSE2-NEXT:    sete %al
 ; X64-SSE2-NEXT:    retq
 ;
 ; X64-SSE41-LABEL: length32_eq_prefer128:
 ; X64-SSE41:       # %bb.0:
 ; X64-SSE41-NEXT:    movdqu (%rdi), %xmm0
 ; X64-SSE41-NEXT:    movdqu 16(%rdi), %xmm1
 ; X64-SSE41-NEXT:    movdqu (%rsi), %xmm2
 ; X64-SSE41-NEXT:    pxor %xmm0, %xmm2
 ; X64-SSE41-NEXT:    movdqu 16(%rsi), %xmm0
 ; X64-SSE41-NEXT:    pxor %xmm1, %xmm0
 ; X64-SSE41-NEXT:    por %xmm2, %xmm0
 ; X64-SSE41-NEXT:    ptest %xmm0, %xmm0
 ; X64-SSE41-NEXT:    sete %al
 ; X64-SSE41-NEXT:    retq
 ;
 ; X64-AVX-LABEL: length32_eq_prefer128:
 ; X64-AVX:       # %bb.0:
 ; X64-AVX-NEXT:    vmovdqu (%rdi), %xmm0
 ; X64-AVX-NEXT:    vmovdqu 16(%rdi), %xmm1
 ; X64-AVX-NEXT:    vpxor 16(%rsi), %xmm1, %xmm1
 ; X64-AVX-NEXT:    vpxor (%rsi), %xmm0, %xmm0
 ; X64-AVX-NEXT:    vpor %xmm1, %xmm0, %xmm0
 ; X64-AVX-NEXT:    vptest %xmm0, %xmm0
 ; X64-AVX-NEXT:    sete %al
 ; X64-AVX-NEXT:    retq
 ;
 ; X64-MIC-AVX-LABEL: length32_eq_prefer128:
 ; X64-MIC-AVX:       # %bb.0:
 ; X64-MIC-AVX-NEXT:    vmovdqu (%rdi), %xmm0
 ; X64-MIC-AVX-NEXT:    vmovdqu 16(%rdi), %xmm1
 ; X64-MIC-AVX-NEXT:    vmovdqu (%rsi), %xmm2
 ; X64-MIC-AVX-NEXT:    vmovdqu 16(%rsi), %xmm3
 ; X64-MIC-AVX-NEXT:    vpcmpneqd %zmm3, %zmm1, %k0
 ; X64-MIC-AVX-NEXT:    vpcmpneqd %zmm2, %zmm0, %k1
 ; X64-MIC-AVX-NEXT:    kortestw %k0, %k1
 ; X64-MIC-AVX-NEXT:    sete %al
 ; X64-MIC-AVX-NEXT:    vzeroupper
 ; X64-MIC-AVX-NEXT:    retq
   %call = tail call i32 @memcmp(i8* %x, i8* %y, i64 32) nounwind
   %cmp = icmp eq i32 %call, 0
   ret i1 %cmp
 }

 define i1 @length32_eq_const(i8* %X) nounwind {
 ; X86-NOSSE-LABEL: length32_eq_const:
 ; X86-NOSSE:       # %bb.0:
 ; X86-NOSSE-NEXT:    pushl $0
 ; X86-NOSSE-NEXT:    pushl $32
 ; X86-NOSSE-NEXT:    pushl $.L.str
 ; X86-NOSSE-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NOSSE-NEXT:    calll memcmp
 ; X86-NOSSE-NEXT:    addl $16, %esp
 ; X86-NOSSE-NEXT:    testl %eax, %eax
 ; X86-NOSSE-NEXT:    setne %al
 ; X86-NOSSE-NEXT:    retl
 ;
 ; X86-SSE1-LABEL: length32_eq_const:
 ; X86-SSE1:       # %bb.0:
 ; X86-SSE1-NEXT:    pushl $0
 ; X86-SSE1-NEXT:    pushl $32
 ; X86-SSE1-NEXT:    pushl $.L.str
 ; X86-SSE1-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-SSE1-NEXT:    calll memcmp
 ; X86-SSE1-NEXT:    addl $16, %esp
 ; X86-SSE1-NEXT:    testl %eax, %eax
 ; X86-SSE1-NEXT:    setne %al
 ; X86-SSE1-NEXT:    retl
 ;
 ; X86-SSE2-LABEL: length32_eq_const:
 ; X86-SSE2:       # %bb.0:
 ; X86-SSE2-NEXT:    movl {{[0-9]+}}(%esp), %eax
 ; X86-SSE2-NEXT:    movdqu (%eax), %xmm0
 ; X86-SSE2-NEXT:    movdqu 16(%eax), %xmm1
 ; X86-SSE2-NEXT:    pcmpeqb {{\.LCPI.*}}, %xmm1
 ; X86-SSE2-NEXT:    pcmpeqb {{\.LCPI.*}}, %xmm0
 ; X86-SSE2-NEXT:    pand %xmm1, %xmm0
 ; X86-SSE2-NEXT:    pmovmskb %xmm0, %eax
 ; X86-SSE2-NEXT:    cmpl $65535, %eax # imm = 0xFFFF
 ; X86-SSE2-NEXT:    setne %al
 ; X86-SSE2-NEXT:    retl
 ;
 ; X86-SSE41-LABEL: length32_eq_const:
 ; X86-SSE41:       # %bb.0:
 ; X86-SSE41-NEXT:    movl {{[0-9]+}}(%esp), %eax
 ; X86-SSE41-NEXT:    movdqu (%eax), %xmm0
 ; X86-SSE41-NEXT:    movdqu 16(%eax), %xmm1
 ; X86-SSE41-NEXT:    pxor {{\.LCPI.*}}, %xmm1
 ; X86-SSE41-NEXT:    pxor {{\.LCPI.*}}, %xmm0
 ; X86-SSE41-NEXT:    por %xmm1, %xmm0
 ; X86-SSE41-NEXT:    ptest %xmm0, %xmm0
 ; X86-SSE41-NEXT:    setne %al
 ; X86-SSE41-NEXT:    retl
 ;
 ; X64-SSE2-LABEL: length32_eq_const:
 ; X64-SSE2:       # %bb.0:
 ; X64-SSE2-NEXT:    movdqu (%rdi), %xmm0
 ; X64-SSE2-NEXT:    movdqu 16(%rdi), %xmm1
 ; X64-SSE2-NEXT:    pcmpeqb {{.*}}(%rip), %xmm1
 ; X64-SSE2-NEXT:    pcmpeqb {{.*}}(%rip), %xmm0
 ; X64-SSE2-NEXT:    pand %xmm1, %xmm0
 ; X64-SSE2-NEXT:    pmovmskb %xmm0, %eax
 ; X64-SSE2-NEXT:    cmpl $65535, %eax # imm = 0xFFFF
 ; X64-SSE2-NEXT:    setne %al
 ; X64-SSE2-NEXT:    retq
 ;
 ; X64-SSE41-LABEL: length32_eq_const:
 ; X64-SSE41:       # %bb.0:
 ; X64-SSE41-NEXT:    movdqu (%rdi), %xmm0
 ; X64-SSE41-NEXT:    movdqu 16(%rdi), %xmm1
 ; X64-SSE41-NEXT:    pxor {{.*}}(%rip), %xmm1
 ; X64-SSE41-NEXT:    pxor {{.*}}(%rip), %xmm0
 ; X64-SSE41-NEXT:    por %xmm1, %xmm0
 ; X64-SSE41-NEXT:    ptest %xmm0, %xmm0
 ; X64-SSE41-NEXT:    setne %al
 ; X64-SSE41-NEXT:    retq
 ;
 ; X64-AVX1-LABEL: length32_eq_const:
 ; X64-AVX1:       # %bb.0:
 ; X64-AVX1-NEXT:    vmovups (%rdi), %ymm0
 ; X64-AVX1-NEXT:    vxorps {{.*}}(%rip), %ymm0, %ymm0
 ; X64-AVX1-NEXT:    vptest %ymm0, %ymm0
 ; X64-AVX1-NEXT:    setne %al
 ; X64-AVX1-NEXT:    vzeroupper
 ; X64-AVX1-NEXT:    retq
 ;
 ; X64-AVX2-LABEL: length32_eq_const:
 ; X64-AVX2:       # %bb.0:
 ; X64-AVX2-NEXT:    vmovdqu (%rdi), %ymm0
 ; X64-AVX2-NEXT:    vpxor {{.*}}(%rip), %ymm0, %ymm0
 ; X64-AVX2-NEXT:    vptest %ymm0, %ymm0
 ; X64-AVX2-NEXT:    setne %al
 ; X64-AVX2-NEXT:    vzeroupper
 ; X64-AVX2-NEXT:    retq
 ;
 ; X64-AVX512-LABEL: length32_eq_const:
 ; X64-AVX512:       # %bb.0:
 ; X64-AVX512-NEXT:    vmovdqu (%rdi), %ymm0
 ; X64-AVX512-NEXT:    vpxor {{.*}}(%rip), %ymm0, %ymm0
 ; X64-AVX512-NEXT:    vptest %ymm0, %ymm0
 ; X64-AVX512-NEXT:    setne %al
 ; X64-AVX512-NEXT:    vzeroupper
 ; X64-AVX512-NEXT:    retq
 ;
 ; X64-MIC-AVX-LABEL: length32_eq_const:
 ; X64-MIC-AVX:       # %bb.0:
 ; X64-MIC-AVX-NEXT:    vmovdqu (%rdi), %ymm0
 ; X64-MIC-AVX-NEXT:    vmovdqa {{.*#+}} ymm1 = [858927408,926299444,825243960,892613426,959985462,858927408,926299444,825243960]
 ; X64-MIC-AVX-NEXT:    vpcmpneqd %zmm1, %zmm0, %k0
 ; X64-MIC-AVX-NEXT:    kortestw %k0, %k0
 ; X64-MIC-AVX-NEXT:    setne %al
 ; X64-MIC-AVX-NEXT:    vzeroupper
 ; X64-MIC-AVX-NEXT:    retq
   %m = tail call i32 @memcmp(i8* %X, i8* getelementptr inbounds ([513 x i8], [513 x i8]* @.str, i32 0, i32 0), i64 32) nounwind
   %c = icmp ne i32 %m, 0
   ret i1 %c
 }

 define i32 @length48(i8* %X, i8* %Y) nounwind {
 ; X86-LABEL: length48:
 ; X86:       # %bb.0:
 ; X86-NEXT:    pushl $0
 ; X86-NEXT:    pushl $48
 ; X86-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NEXT:    calll memcmp
 ; X86-NEXT:    addl $16, %esp
 ; X86-NEXT:    retl
 ;
 ; X64-LABEL: length48:
 ; X64:       # %bb.0:
 ; X64-NEXT:    movl $48, %edx
 ; X64-NEXT:    jmp memcmp # TAILCALL
   %m = tail call i32 @memcmp(i8* %X, i8* %Y, i64 48) nounwind
   ret i32 %m
 }

 define i1 @length48_eq(i8* %x, i8* %y) nounwind {
 ; X86-NOSSE-LABEL: length48_eq:
 ; X86-NOSSE:       # %bb.0:
 ; X86-NOSSE-NEXT:    pushl $0
 ; X86-NOSSE-NEXT:    pushl $48
 ; X86-NOSSE-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NOSSE-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NOSSE-NEXT:    calll memcmp
 ; X86-NOSSE-NEXT:    addl $16, %esp
 ; X86-NOSSE-NEXT:    testl %eax, %eax
 ; X86-NOSSE-NEXT:    sete %al
 ; X86-NOSSE-NEXT:    retl
 ;
 ; X86-SSE1-LABEL: length48_eq:
 ; X86-SSE1:       # %bb.0:
 ; X86-SSE1-NEXT:    pushl $0
 ; X86-SSE1-NEXT:    pushl $48
 ; X86-SSE1-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-SSE1-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-SSE1-NEXT:    calll memcmp
 ; X86-SSE1-NEXT:    addl $16, %esp
 ; X86-SSE1-NEXT:    testl %eax, %eax
 ; X86-SSE1-NEXT:    sete %al
 ; X86-SSE1-NEXT:    retl
 ;
 ; X86-SSE2-LABEL: length48_eq:
 ; X86-SSE2:       # %bb.0:
 ; X86-SSE2-NEXT:    movl {{[0-9]+}}(%esp), %eax
 ; X86-SSE2-NEXT:    movl {{[0-9]+}}(%esp), %ecx
 ; X86-SSE2-NEXT:    movdqu (%ecx), %xmm0
 ; X86-SSE2-NEXT:    movdqu 16(%ecx), %xmm1
 ; X86-SSE2-NEXT:    movdqu (%eax), %xmm2
 ; X86-SSE2-NEXT:    pcmpeqb %xmm0, %xmm2
 ; X86-SSE2-NEXT:    movdqu 16(%eax), %xmm0
 ; X86-SSE2-NEXT:    pcmpeqb %xmm1, %xmm0
 ; X86-SSE2-NEXT:    movdqu 32(%ecx), %xmm1
 ; X86-SSE2-NEXT:    movdqu 32(%eax), %xmm3
 ; X86-SSE2-NEXT:    pcmpeqb %xmm1, %xmm3
 ; X86-SSE2-NEXT:    pand %xmm0, %xmm3
 ; X86-SSE2-NEXT:    pand %xmm2, %xmm3
 ; X86-SSE2-NEXT:    pmovmskb %xmm3, %eax
 ; X86-SSE2-NEXT:    cmpl $65535, %eax # imm = 0xFFFF
 ; X86-SSE2-NEXT:    sete %al
 ; X86-SSE2-NEXT:    retl
 ;
 ; X86-SSE41-LABEL: length48_eq:
 ; X86-SSE41:       # %bb.0:
 ; X86-SSE41-NEXT:    movl {{[0-9]+}}(%esp), %eax
 ; X86-SSE41-NEXT:    movl {{[0-9]+}}(%esp), %ecx
 ; X86-SSE41-NEXT:    movdqu (%ecx), %xmm0
 ; X86-SSE41-NEXT:    movdqu 16(%ecx), %xmm1
 ; X86-SSE41-NEXT:    movdqu (%eax), %xmm2
 ; X86-SSE41-NEXT:    pxor %xmm0, %xmm2
 ; X86-SSE41-NEXT:    movdqu 16(%eax), %xmm0
 ; X86-SSE41-NEXT:    pxor %xmm1, %xmm0
 ; X86-SSE41-NEXT:    movdqu 32(%ecx), %xmm1
 ; X86-SSE41-NEXT:    movdqu 32(%eax), %xmm3
 ; X86-SSE41-NEXT:    pxor %xmm1, %xmm3
 ; X86-SSE41-NEXT:    por %xmm0, %xmm3
 ; X86-SSE41-NEXT:    por %xmm2, %xmm3
 ; X86-SSE41-NEXT:    ptest %xmm3, %xmm3
 ; X86-SSE41-NEXT:    sete %al
 ; X86-SSE41-NEXT:    retl
 ;
 ; X64-SSE2-LABEL: length48_eq:
 ; X64-SSE2:       # %bb.0:
 ; X64-SSE2-NEXT:    movdqu (%rdi), %xmm0
 ; X64-SSE2-NEXT:    movdqu 16(%rdi), %xmm1
 ; X64-SSE2-NEXT:    movdqu 32(%rdi), %xmm2
 ; X64-SSE2-NEXT:    movdqu (%rsi), %xmm3
 ; X64-SSE2-NEXT:    pcmpeqb %xmm0, %xmm3
 ; X64-SSE2-NEXT:    movdqu 16(%rsi), %xmm0
 ; X64-SSE2-NEXT:    pcmpeqb %xmm1, %xmm0
 ; X64-SSE2-NEXT:    movdqu 32(%rsi), %xmm1
 ; X64-SSE2-NEXT:    pcmpeqb %xmm2, %xmm1
 ; X64-SSE2-NEXT:    pand %xmm0, %xmm1
 ; X64-SSE2-NEXT:    pand %xmm3, %xmm1
 ; X64-SSE2-NEXT:    pmovmskb %xmm1, %eax
 ; X64-SSE2-NEXT:    cmpl $65535, %eax # imm = 0xFFFF
 ; X64-SSE2-NEXT:    sete %al
 ; X64-SSE2-NEXT:    retq
 ;
 ; X64-SSE41-LABEL: length48_eq:
 ; X64-SSE41:       # %bb.0:
 ; X64-SSE41-NEXT:    movdqu (%rdi), %xmm0
 ; X64-SSE41-NEXT:    movdqu 16(%rdi), %xmm1
 ; X64-SSE41-NEXT:    movdqu 32(%rdi), %xmm2
 ; X64-SSE41-NEXT:    movdqu (%rsi), %xmm3
 ; X64-SSE41-NEXT:    pxor %xmm0, %xmm3
 ; X64-SSE41-NEXT:    movdqu 16(%rsi), %xmm0
 ; X64-SSE41-NEXT:    pxor %xmm1, %xmm0
 ; X64-SSE41-NEXT:    movdqu 32(%rsi), %xmm1
 ; X64-SSE41-NEXT:    pxor %xmm2, %xmm1
 ; X64-SSE41-NEXT:    por %xmm0, %xmm1
 ; X64-SSE41-NEXT:    por %xmm3, %xmm1
 ; X64-SSE41-NEXT:    ptest %xmm1, %xmm1
 ; X64-SSE41-NEXT:    sete %al
 ; X64-SSE41-NEXT:    retq
 ;
 ; X64-AVX1-LABEL: length48_eq:
 ; X64-AVX1:       # %bb.0:
 ; X64-AVX1-NEXT:    vmovups (%rdi), %ymm0
 ; X64-AVX1-NEXT:    vmovups 32(%rdi), %xmm1
 ; X64-AVX1-NEXT:    vmovups 32(%rsi), %xmm2
 ; X64-AVX1-NEXT:    vxorps (%rsi), %ymm0, %ymm0
 ; X64-AVX1-NEXT:    vxorps %ymm2, %ymm1, %ymm1
 ; X64-AVX1-NEXT:    vorps %ymm1, %ymm0, %ymm0
 ; X64-AVX1-NEXT:    vptest %ymm0, %ymm0
 ; X64-AVX1-NEXT:    sete %al
 ; X64-AVX1-NEXT:    vzeroupper
 ; X64-AVX1-NEXT:    retq
 ;
 ; X64-AVX2-LABEL: length48_eq:
 ; X64-AVX2:       # %bb.0:
 ; X64-AVX2-NEXT:    vmovdqu (%rdi), %ymm0
 ; X64-AVX2-NEXT:    vmovdqu 32(%rdi), %xmm1
 ; X64-AVX2-NEXT:    vmovdqu 32(%rsi), %xmm2
 ; X64-AVX2-NEXT:    vpxor (%rsi), %ymm0, %ymm0
 ; X64-AVX2-NEXT:    vpxor %ymm2, %ymm1, %ymm1
 ; X64-AVX2-NEXT:    vpor %ymm1, %ymm0, %ymm0
 ; X64-AVX2-NEXT:    vptest %ymm0, %ymm0
 ; X64-AVX2-NEXT:    sete %al
 ; X64-AVX2-NEXT:    vzeroupper
 ; X64-AVX2-NEXT:    retq
 ;
 ; X64-AVX512-LABEL: length48_eq:
 ; X64-AVX512:       # %bb.0:
 ; X64-AVX512-NEXT:    vmovdqu (%rdi), %ymm0
 ; X64-AVX512-NEXT:    vmovdqu 32(%rdi), %xmm1
 ; X64-AVX512-NEXT:    vmovdqu 32(%rsi), %xmm2
 ; X64-AVX512-NEXT:    vpxor (%rsi), %ymm0, %ymm0
 ; X64-AVX512-NEXT:    vpxor %ymm2, %ymm1, %ymm1
 ; X64-AVX512-NEXT:    vpor %ymm1, %ymm0, %ymm0
 ; X64-AVX512-NEXT:    vptest %ymm0, %ymm0
 ; X64-AVX512-NEXT:    sete %al
 ; X64-AVX512-NEXT:    vzeroupper
 ; X64-AVX512-NEXT:    retq
 ;
 ; X64-MIC-AVX-LABEL: length48_eq:
 ; X64-MIC-AVX:       # %bb.0:
 ; X64-MIC-AVX-NEXT:    vmovdqu (%rdi), %ymm0
 ; X64-MIC-AVX-NEXT:    vmovdqu (%rsi), %ymm1
 ; X64-MIC-AVX-NEXT:    vmovdqu 32(%rdi), %xmm2
 ; X64-MIC-AVX-NEXT:    vmovdqu 32(%rsi), %xmm3
 ; X64-MIC-AVX-NEXT:    vpcmpneqd %zmm3, %zmm2, %k0
 ; X64-MIC-AVX-NEXT:    vpcmpneqd %zmm1, %zmm0, %k1
 ; X64-MIC-AVX-NEXT:    kortestw %k0, %k1
 ; X64-MIC-AVX-NEXT:    sete %al
 ; X64-MIC-AVX-NEXT:    vzeroupper
 ; X64-MIC-AVX-NEXT:    retq
   %call = tail call i32 @memcmp(i8* %x, i8* %y, i64 48) nounwind
   %cmp = icmp eq i32 %call, 0
   ret i1 %cmp
 }

 define i1 @length48_lt(i8* %x, i8* %y) nounwind {
 ; X86-LABEL: length48_lt:
 ; X86:       # %bb.0:
 ; X86-NEXT:    pushl $0
 ; X86-NEXT:    pushl $48
 ; X86-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NEXT:    calll memcmp
 ; X86-NEXT:    addl $16, %esp
 ; X86-NEXT:    shrl $31, %eax
 ; X86-NEXT:    # kill: def $al killed $al killed $eax
 ; X86-NEXT:    retl
 ;
 ; X64-LABEL: length48_lt:
 ; X64:       # %bb.0:
 ; X64-NEXT:    pushq %rax
 ; X64-NEXT:    movl $48, %edx
 ; X64-NEXT:    callq memcmp
 ; X64-NEXT:    shrl $31, %eax
 ; X64-NEXT:    # kill: def $al killed $al killed $eax
 ; X64-NEXT:    popq %rcx
 ; X64-NEXT:    retq
   %call = tail call i32 @memcmp(i8* %x, i8* %y, i64 48) nounwind
   %cmp = icmp slt i32 %call, 0
   ret i1 %cmp
 }

 define i1 @length48_gt(i8* %x, i8* %y) nounwind {
 ; X86-LABEL: length48_gt:
 ; X86:       # %bb.0:
 ; X86-NEXT:    pushl $0
 ; X86-NEXT:    pushl $48
 ; X86-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NEXT:    calll memcmp
 ; X86-NEXT:    addl $16, %esp
 ; X86-NEXT:    testl %eax, %eax
 ; X86-NEXT:    setg %al
 ; X86-NEXT:    retl
 ;
 ; X64-LABEL: length48_gt:
 ; X64:       # %bb.0:
 ; X64-NEXT:    pushq %rax
 ; X64-NEXT:    movl $48, %edx
 ; X64-NEXT:    callq memcmp
 ; X64-NEXT:    testl %eax, %eax
 ; X64-NEXT:    setg %al
 ; X64-NEXT:    popq %rcx
 ; X64-NEXT:    retq
   %call = tail call i32 @memcmp(i8* %x, i8* %y, i64 48) nounwind
   %cmp = icmp sgt i32 %call, 0
   ret i1 %cmp
 }

 define i1 @length48_eq_prefer128(i8* %x, i8* %y) nounwind "prefer-vector-width"="128" {
 ; X86-NOSSE-LABEL: length48_eq_prefer128:
 ; X86-NOSSE:       # %bb.0:
 ; X86-NOSSE-NEXT:    pushl $0
 ; X86-NOSSE-NEXT:    pushl $48
 ; X86-NOSSE-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NOSSE-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NOSSE-NEXT:    calll memcmp
 ; X86-NOSSE-NEXT:    addl $16, %esp
 ; X86-NOSSE-NEXT:    testl %eax, %eax
 ; X86-NOSSE-NEXT:    sete %al
 ; X86-NOSSE-NEXT:    retl
 ;
 ; X86-SSE1-LABEL: length48_eq_prefer128:
 ; X86-SSE1:       # %bb.0:
 ; X86-SSE1-NEXT:    pushl $0
 ; X86-SSE1-NEXT:    pushl $48
 ; X86-SSE1-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-SSE1-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-SSE1-NEXT:    calll memcmp
 ; X86-SSE1-NEXT:    addl $16, %esp
 ; X86-SSE1-NEXT:    testl %eax, %eax
 ; X86-SSE1-NEXT:    sete %al
 ; X86-SSE1-NEXT:    retl
 ;
 ; X86-SSE2-LABEL: length48_eq_prefer128:
 ; X86-SSE2:       # %bb.0:
 ; X86-SSE2-NEXT:    movl {{[0-9]+}}(%esp), %eax
 ; X86-SSE2-NEXT:    movl {{[0-9]+}}(%esp), %ecx
 ; X86-SSE2-NEXT:    movdqu (%ecx), %xmm0
 ; X86-SSE2-NEXT:    movdqu 16(%ecx), %xmm1
 ; X86-SSE2-NEXT:    movdqu (%eax), %xmm2
 ; X86-SSE2-NEXT:    pcmpeqb %xmm0, %xmm2
 ; X86-SSE2-NEXT:    movdqu 16(%eax), %xmm0
 ; X86-SSE2-NEXT:    pcmpeqb %xmm1, %xmm0
 ; X86-SSE2-NEXT:    movdqu 32(%ecx), %xmm1
 ; X86-SSE2-NEXT:    movdqu 32(%eax), %xmm3
 ; X86-SSE2-NEXT:    pcmpeqb %xmm1, %xmm3
 ; X86-SSE2-NEXT:    pand %xmm0, %xmm3
 ; X86-SSE2-NEXT:    pand %xmm2, %xmm3
 ; X86-SSE2-NEXT:    pmovmskb %xmm3, %eax
 ; X86-SSE2-NEXT:    cmpl $65535, %eax # imm = 0xFFFF
 ; X86-SSE2-NEXT:    sete %al
 ; X86-SSE2-NEXT:    retl
 ;
 ; X86-SSE41-LABEL: length48_eq_prefer128:
 ; X86-SSE41:       # %bb.0:
 ; X86-SSE41-NEXT:    movl {{[0-9]+}}(%esp), %eax
 ; X86-SSE41-NEXT:    movl {{[0-9]+}}(%esp), %ecx
 ; X86-SSE41-NEXT:    movdqu (%ecx), %xmm0
 ; X86-SSE41-NEXT:    movdqu 16(%ecx), %xmm1
 ; X86-SSE41-NEXT:    movdqu (%eax), %xmm2
 ; X86-SSE41-NEXT:    pxor %xmm0, %xmm2
 ; X86-SSE41-NEXT:    movdqu 16(%eax), %xmm0
 ; X86-SSE41-NEXT:    pxor %xmm1, %xmm0
 ; X86-SSE41-NEXT:    movdqu 32(%ecx), %xmm1
 ; X86-SSE41-NEXT:    movdqu 32(%eax), %xmm3
 ; X86-SSE41-NEXT:    pxor %xmm1, %xmm3
 ; X86-SSE41-NEXT:    por %xmm0, %xmm3
 ; X86-SSE41-NEXT:    por %xmm2, %xmm3
 ; X86-SSE41-NEXT:    ptest %xmm3, %xmm3
 ; X86-SSE41-NEXT:    sete %al
 ; X86-SSE41-NEXT:    retl
 ;
 ; X64-SSE2-LABEL: length48_eq_prefer128:
 ; X64-SSE2:       # %bb.0:
 ; X64-SSE2-NEXT:    movdqu (%rdi), %xmm0
 ; X64-SSE2-NEXT:    movdqu 16(%rdi), %xmm1
 ; X64-SSE2-NEXT:    movdqu 32(%rdi), %xmm2
 ; X64-SSE2-NEXT:    movdqu (%rsi), %xmm3
 ; X64-SSE2-NEXT:    pcmpeqb %xmm0, %xmm3
 ; X64-SSE2-NEXT:    movdqu 16(%rsi), %xmm0
 ; X64-SSE2-NEXT:    pcmpeqb %xmm1, %xmm0
 ; X64-SSE2-NEXT:    movdqu 32(%rsi), %xmm1
 ; X64-SSE2-NEXT:    pcmpeqb %xmm2, %xmm1
 ; X64-SSE2-NEXT:    pand %xmm0, %xmm1
 ; X64-SSE2-NEXT:    pand %xmm3, %xmm1
 ; X64-SSE2-NEXT:    pmovmskb %xmm1, %eax
 ; X64-SSE2-NEXT:    cmpl $65535, %eax # imm = 0xFFFF
 ; X64-SSE2-NEXT:    sete %al
 ; X64-SSE2-NEXT:    retq
 ;
 ; X64-SSE41-LABEL: length48_eq_prefer128:
 ; X64-SSE41:       # %bb.0:
 ; X64-SSE41-NEXT:    movdqu (%rdi), %xmm0
 ; X64-SSE41-NEXT:    movdqu 16(%rdi), %xmm1
 ; X64-SSE41-NEXT:    movdqu 32(%rdi), %xmm2
 ; X64-SSE41-NEXT:    movdqu (%rsi), %xmm3
 ; X64-SSE41-NEXT:    pxor %xmm0, %xmm3
 ; X64-SSE41-NEXT:    movdqu 16(%rsi), %xmm0
 ; X64-SSE41-NEXT:    pxor %xmm1, %xmm0
 ; X64-SSE41-NEXT:    movdqu 32(%rsi), %xmm1
 ; X64-SSE41-NEXT:    pxor %xmm2, %xmm1
 ; X64-SSE41-NEXT:    por %xmm0, %xmm1
 ; X64-SSE41-NEXT:    por %xmm3, %xmm1
 ; X64-SSE41-NEXT:    ptest %xmm1, %xmm1
 ; X64-SSE41-NEXT:    sete %al
 ; X64-SSE41-NEXT:    retq
 ;
 ; X64-AVX-LABEL: length48_eq_prefer128:
 ; X64-AVX:       # %bb.0:
 ; X64-AVX-NEXT:    vmovdqu (%rdi), %xmm0
 ; X64-AVX-NEXT:    vmovdqu 16(%rdi), %xmm1
 ; X64-AVX-NEXT:    vmovdqu 32(%rdi), %xmm2
 ; X64-AVX-NEXT:    vpxor 16(%rsi), %xmm1, %xmm1
 ; X64-AVX-NEXT:    vpxor (%rsi), %xmm0, %xmm0
 ; X64-AVX-NEXT:    vpxor 32(%rsi), %xmm2, %xmm2
 ; X64-AVX-NEXT:    vpor %xmm2, %xmm1, %xmm1
 ; X64-AVX-NEXT:    vpor %xmm1, %xmm0, %xmm0
 ; X64-AVX-NEXT:    vptest %xmm0, %xmm0
 ; X64-AVX-NEXT:    sete %al
 ; X64-AVX-NEXT:    retq
 ;
 ; X64-MIC-AVX-LABEL: length48_eq_prefer128:
 ; X64-MIC-AVX:       # %bb.0:
 ; X64-MIC-AVX-NEXT:    vmovdqu (%rdi), %xmm0
 ; X64-MIC-AVX-NEXT:    vmovdqu 16(%rdi), %xmm1
 ; X64-MIC-AVX-NEXT:    vmovdqu 32(%rdi), %xmm2
 ; X64-MIC-AVX-NEXT:    vmovdqu (%rsi), %xmm3
 ; X64-MIC-AVX-NEXT:    vmovdqu 16(%rsi), %xmm4
 ; X64-MIC-AVX-NEXT:    vmovdqu 32(%rsi), %xmm5
 ; X64-MIC-AVX-NEXT:    vpcmpneqd %zmm4, %zmm1, %k0
 ; X64-MIC-AVX-NEXT:    vpcmpneqd %zmm3, %zmm0, %k1
 ; X64-MIC-AVX-NEXT:    korw %k0, %k1, %k0
 ; X64-MIC-AVX-NEXT:    vpcmpneqd %zmm5, %zmm2, %k1
 ; X64-MIC-AVX-NEXT:    kortestw %k1, %k0
 ; X64-MIC-AVX-NEXT:    sete %al
 ; X64-MIC-AVX-NEXT:    vzeroupper
 ; X64-MIC-AVX-NEXT:    retq
   %call = tail call i32 @memcmp(i8* %x, i8* %y, i64 48) nounwind
   %cmp = icmp eq i32 %call, 0
   ret i1 %cmp
 }

 define i1 @length48_eq_const(i8* %X) nounwind {
 ; X86-NOSSE-LABEL: length48_eq_const:
 ; X86-NOSSE:       # %bb.0:
 ; X86-NOSSE-NEXT:    pushl $0
 ; X86-NOSSE-NEXT:    pushl $48
 ; X86-NOSSE-NEXT:    pushl $.L.str
 ; X86-NOSSE-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NOSSE-NEXT:    calll memcmp
 ; X86-NOSSE-NEXT:    addl $16, %esp
 ; X86-NOSSE-NEXT:    testl %eax, %eax
 ; X86-NOSSE-NEXT:    setne %al
 ; X86-NOSSE-NEXT:    retl
 ;
 ; X86-SSE1-LABEL: length48_eq_const:
 ; X86-SSE1:       # %bb.0:
 ; X86-SSE1-NEXT:    pushl $0
 ; X86-SSE1-NEXT:    pushl $48
 ; X86-SSE1-NEXT:    pushl $.L.str
 ; X86-SSE1-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-SSE1-NEXT:    calll memcmp
 ; X86-SSE1-NEXT:    addl $16, %esp
 ; X86-SSE1-NEXT:    testl %eax, %eax
 ; X86-SSE1-NEXT:    setne %al
 ; X86-SSE1-NEXT:    retl
 ;
 ; X86-SSE2-LABEL: length48_eq_const:
 ; X86-SSE2:       # %bb.0:
 ; X86-SSE2-NEXT:    movl {{[0-9]+}}(%esp), %eax
 ; X86-SSE2-NEXT:    movdqu (%eax), %xmm0
 ; X86-SSE2-NEXT:    movdqu 16(%eax), %xmm1
 ; X86-SSE2-NEXT:    movdqu 32(%eax), %xmm2
 ; X86-SSE2-NEXT:    pcmpeqb {{\.LCPI.*}}, %xmm1
 ; X86-SSE2-NEXT:    pcmpeqb {{\.LCPI.*}}, %xmm0
 ; X86-SSE2-NEXT:    pcmpeqb {{\.LCPI.*}}, %xmm2
 ; X86-SSE2-NEXT:    pand %xmm1, %xmm2
 ; X86-SSE2-NEXT:    pand %xmm0, %xmm2
 ; X86-SSE2-NEXT:    pmovmskb %xmm2, %eax
 ; X86-SSE2-NEXT:    cmpl $65535, %eax # imm = 0xFFFF
 ; X86-SSE2-NEXT:    setne %al
 ; X86-SSE2-NEXT:    retl
 ;
 ; X86-SSE41-LABEL: length48_eq_const:
 ; X86-SSE41:       # %bb.0:
 ; X86-SSE41-NEXT:    movl {{[0-9]+}}(%esp), %eax
 ; X86-SSE41-NEXT:    movdqu (%eax), %xmm0
 ; X86-SSE41-NEXT:    movdqu 16(%eax), %xmm1
 ; X86-SSE41-NEXT:    movdqu 32(%eax), %xmm2
 ; X86-SSE41-NEXT:    pxor {{\.LCPI.*}}, %xmm1
 ; X86-SSE41-NEXT:    pxor {{\.LCPI.*}}, %xmm0
 ; X86-SSE41-NEXT:    pxor {{\.LCPI.*}}, %xmm2
 ; X86-SSE41-NEXT:    por %xmm1, %xmm2
 ; X86-SSE41-NEXT:    por %xmm0, %xmm2
 ; X86-SSE41-NEXT:    ptest %xmm2, %xmm2
 ; X86-SSE41-NEXT:    setne %al
 ; X86-SSE41-NEXT:    retl
 ;
 ; X64-SSE2-LABEL: length48_eq_const:
 ; X64-SSE2:       # %bb.0:
 ; X64-SSE2-NEXT:    movdqu (%rdi), %xmm0
 ; X64-SSE2-NEXT:    movdqu 16(%rdi), %xmm1
 ; X64-SSE2-NEXT:    movdqu 32(%rdi), %xmm2
 ; X64-SSE2-NEXT:    pcmpeqb {{.*}}(%rip), %xmm1
 ; X64-SSE2-NEXT:    pcmpeqb {{.*}}(%rip), %xmm0
 ; X64-SSE2-NEXT:    pcmpeqb {{.*}}(%rip), %xmm2
 ; X64-SSE2-NEXT:    pand %xmm1, %xmm2
 ; X64-SSE2-NEXT:    pand %xmm0, %xmm2
 ; X64-SSE2-NEXT:    pmovmskb %xmm2, %eax
 ; X64-SSE2-NEXT:    cmpl $65535, %eax # imm = 0xFFFF
 ; X64-SSE2-NEXT:    setne %al
 ; X64-SSE2-NEXT:    retq
 ;
 ; X64-SSE41-LABEL: length48_eq_const:
 ; X64-SSE41:       # %bb.0:
 ; X64-SSE41-NEXT:    movdqu (%rdi), %xmm0
 ; X64-SSE41-NEXT:    movdqu 16(%rdi), %xmm1
 ; X64-SSE41-NEXT:    movdqu 32(%rdi), %xmm2
 ; X64-SSE41-NEXT:    pxor {{.*}}(%rip), %xmm1
 ; X64-SSE41-NEXT:    pxor {{.*}}(%rip), %xmm0
 ; X64-SSE41-NEXT:    pxor {{.*}}(%rip), %xmm2
 ; X64-SSE41-NEXT:    por %xmm1, %xmm2
 ; X64-SSE41-NEXT:    por %xmm0, %xmm2
 ; X64-SSE41-NEXT:    ptest %xmm2, %xmm2
 ; X64-SSE41-NEXT:    setne %al
 ; X64-SSE41-NEXT:    retq
 ;
 ; X64-AVX1-LABEL: length48_eq_const:
 ; X64-AVX1:       # %bb.0:
 ; X64-AVX1-NEXT:    vmovups (%rdi), %ymm0
 ; X64-AVX1-NEXT:    vmovups 32(%rdi), %xmm1
 ; X64-AVX1-NEXT:    vxorps {{.*}}(%rip), %ymm0, %ymm0
 ; X64-AVX1-NEXT:    vxorps {{.*}}(%rip), %ymm1, %ymm1
 ; X64-AVX1-NEXT:    vorps %ymm1, %ymm0, %ymm0
 ; X64-AVX1-NEXT:    vptest %ymm0, %ymm0
 ; X64-AVX1-NEXT:    setne %al
 ; X64-AVX1-NEXT:    vzeroupper
 ; X64-AVX1-NEXT:    retq
 ;
 ; X64-AVX2-LABEL: length48_eq_const:
 ; X64-AVX2:       # %bb.0:
 ; X64-AVX2-NEXT:    vmovdqu (%rdi), %ymm0
 ; X64-AVX2-NEXT:    vmovdqu 32(%rdi), %xmm1
 ; X64-AVX2-NEXT:    vpxor {{.*}}(%rip), %ymm0, %ymm0
 ; X64-AVX2-NEXT:    vpxor {{.*}}(%rip), %ymm1, %ymm1
 ; X64-AVX2-NEXT:    vpor %ymm1, %ymm0, %ymm0
 ; X64-AVX2-NEXT:    vptest %ymm0, %ymm0
 ; X64-AVX2-NEXT:    setne %al
 ; X64-AVX2-NEXT:    vzeroupper
 ; X64-AVX2-NEXT:    retq
 ;
 ; X64-AVX512-LABEL: length48_eq_const:
 ; X64-AVX512:       # %bb.0:
 ; X64-AVX512-NEXT:    vmovdqu (%rdi), %ymm0
 ; X64-AVX512-NEXT:    vmovdqu 32(%rdi), %xmm1
 ; X64-AVX512-NEXT:    vpxor {{.*}}(%rip), %ymm0, %ymm0
 ; X64-AVX512-NEXT:    vpxor {{.*}}(%rip), %ymm1, %ymm1
 ; X64-AVX512-NEXT:    vpor %ymm1, %ymm0, %ymm0
 ; X64-AVX512-NEXT:    vptest %ymm0, %ymm0
 ; X64-AVX512-NEXT:    setne %al
 ; X64-AVX512-NEXT:    vzeroupper
 ; X64-AVX512-NEXT:    retq
 ;
 ; X64-MIC-AVX-LABEL: length48_eq_const:
 ; X64-MIC-AVX:       # %bb.0:
 ; X64-MIC-AVX-NEXT:    vmovdqu (%rdi), %ymm0
 ; X64-MIC-AVX-NEXT:    vmovdqu 32(%rdi), %xmm1
 ; X64-MIC-AVX-NEXT:    vmovdqa {{.*#+}} ymm2 = [892613426,959985462,858927408,926299444,0,0,0,0]
 ; X64-MIC-AVX-NEXT:    vpcmpneqd %zmm2, %zmm1, %k0
 ; X64-MIC-AVX-NEXT:    vmovdqa {{.*#+}} ymm1 = [858927408,926299444,825243960,892613426,959985462,858927408,926299444,825243960]
 ; X64-MIC-AVX-NEXT:    vpcmpneqd %zmm1, %zmm0, %k1
 ; X64-MIC-AVX-NEXT:    kortestw %k0, %k1
 ; X64-MIC-AVX-NEXT:    setne %al
 ; X64-MIC-AVX-NEXT:    vzeroupper
 ; X64-MIC-AVX-NEXT:    retq
   %m = tail call i32 @memcmp(i8* %X, i8* getelementptr inbounds ([513 x i8], [513 x i8]* @.str, i32 0, i32 0), i64 48) nounwind
   %c = icmp ne i32 %m, 0
   ret i1 %c
 }

 define i32 @length63(i8* %X, i8* %Y) nounwind {
 ; X86-LABEL: length63:
 ; X86:       # %bb.0:
 ; X86-NEXT:    pushl $0
 ; X86-NEXT:    pushl $63
 ; X86-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NEXT:    calll memcmp
 ; X86-NEXT:    addl $16, %esp
 ; X86-NEXT:    retl
 ;
 ; X64-LABEL: length63:
 ; X64:       # %bb.0:
 ; X64-NEXT:    movl $63, %edx
 ; X64-NEXT:    jmp memcmp # TAILCALL
   %m = tail call i32 @memcmp(i8* %X, i8* %Y, i64 63) nounwind
   ret i32 %m
 }

 define i1 @length63_eq(i8* %x, i8* %y) nounwind {
 ; X86-NOSSE-LABEL: length63_eq:
 ; X86-NOSSE:       # %bb.0:
 ; X86-NOSSE-NEXT:    pushl $0
 ; X86-NOSSE-NEXT:    pushl $63
 ; X86-NOSSE-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NOSSE-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NOSSE-NEXT:    calll memcmp
 ; X86-NOSSE-NEXT:    addl $16, %esp
 ; X86-NOSSE-NEXT:    testl %eax, %eax
 ; X86-NOSSE-NEXT:    setne %al
 ; X86-NOSSE-NEXT:    retl
 ;
 ; X86-SSE1-LABEL: length63_eq:
 ; X86-SSE1:       # %bb.0:
 ; X86-SSE1-NEXT:    pushl $0
 ; X86-SSE1-NEXT:    pushl $63
 ; X86-SSE1-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-SSE1-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-SSE1-NEXT:    calll memcmp
 ; X86-SSE1-NEXT:    addl $16, %esp
 ; X86-SSE1-NEXT:    testl %eax, %eax
 ; X86-SSE1-NEXT:    setne %al
 ; X86-SSE1-NEXT:    retl
 ;
 ; X86-SSE2-LABEL: length63_eq:
 ; X86-SSE2:       # %bb.0:
 ; X86-SSE2-NEXT:    movl {{[0-9]+}}(%esp), %eax
 ; X86-SSE2-NEXT:    movl {{[0-9]+}}(%esp), %ecx
 ; X86-SSE2-NEXT:    movdqu (%ecx), %xmm0
 ; X86-SSE2-NEXT:    movdqu 16(%ecx), %xmm1
 ; X86-SSE2-NEXT:    movdqu (%eax), %xmm2
 ; X86-SSE2-NEXT:    pcmpeqb %xmm0, %xmm2
 ; X86-SSE2-NEXT:    movdqu 16(%eax), %xmm0
 ; X86-SSE2-NEXT:    pcmpeqb %xmm1, %xmm0
 ; X86-SSE2-NEXT:    movdqu 32(%ecx), %xmm1
 ; X86-SSE2-NEXT:    movdqu 32(%eax), %xmm3
 ; X86-SSE2-NEXT:    pcmpeqb %xmm1, %xmm3
 ; X86-SSE2-NEXT:    movdqu 47(%ecx), %xmm1
 ; X86-SSE2-NEXT:    movdqu 47(%eax), %xmm4
 ; X86-SSE2-NEXT:    pcmpeqb %xmm1, %xmm4
 ; X86-SSE2-NEXT:    pand %xmm3, %xmm4
 ; X86-SSE2-NEXT:    pand %xmm0, %xmm4
 ; X86-SSE2-NEXT:    pand %xmm2, %xmm4
 ; X86-SSE2-NEXT:    pmovmskb %xmm4, %eax
 ; X86-SSE2-NEXT:    cmpl $65535, %eax # imm = 0xFFFF
 ; X86-SSE2-NEXT:    setne %al
 ; X86-SSE2-NEXT:    retl
 ;
 ; X86-SSE41-LABEL: length63_eq:
 ; X86-SSE41:       # %bb.0:
 ; X86-SSE41-NEXT:    movl {{[0-9]+}}(%esp), %eax
 ; X86-SSE41-NEXT:    movl {{[0-9]+}}(%esp), %ecx
 ; X86-SSE41-NEXT:    movdqu (%ecx), %xmm0
 ; X86-SSE41-NEXT:    movdqu 16(%ecx), %xmm1
 ; X86-SSE41-NEXT:    movdqu (%eax), %xmm2
 ; X86-SSE41-NEXT:    pxor %xmm0, %xmm2
 ; X86-SSE41-NEXT:    movdqu 16(%eax), %xmm0
 ; X86-SSE41-NEXT:    pxor %xmm1, %xmm0
 ; X86-SSE41-NEXT:    movdqu 32(%ecx), %xmm1
 ; X86-SSE41-NEXT:    movdqu 32(%eax), %xmm3
 ; X86-SSE41-NEXT:    pxor %xmm1, %xmm3
 ; X86-SSE41-NEXT:    movdqu 47(%ecx), %xmm1
 ; X86-SSE41-NEXT:    movdqu 47(%eax), %xmm4
 ; X86-SSE41-NEXT:    pxor %xmm1, %xmm4
 ; X86-SSE41-NEXT:    por %xmm3, %xmm4
 ; X86-SSE41-NEXT:    por %xmm0, %xmm4
 ; X86-SSE41-NEXT:    por %xmm2, %xmm4
 ; X86-SSE41-NEXT:    ptest %xmm4, %xmm4
 ; X86-SSE41-NEXT:    setne %al
 ; X86-SSE41-NEXT:    retl
 ;
 ; X64-SSE2-LABEL: length63_eq:
 ; X64-SSE2:       # %bb.0:
 ; X64-SSE2-NEXT:    movdqu (%rdi), %xmm0
 ; X64-SSE2-NEXT:    movdqu 16(%rdi), %xmm1
 ; X64-SSE2-NEXT:    movdqu 32(%rdi), %xmm2
 ; X64-SSE2-NEXT:    movdqu 47(%rdi), %xmm3
 ; X64-SSE2-NEXT:    movdqu (%rsi), %xmm4
 ; X64-SSE2-NEXT:    pcmpeqb %xmm0, %xmm4
 ; X64-SSE2-NEXT:    movdqu 16(%rsi), %xmm0
 ; X64-SSE2-NEXT:    pcmpeqb %xmm1, %xmm0
 ; X64-SSE2-NEXT:    movdqu 32(%rsi), %xmm1
 ; X64-SSE2-NEXT:    pcmpeqb %xmm2, %xmm1
 ; X64-SSE2-NEXT:    movdqu 47(%rsi), %xmm2
 ; X64-SSE2-NEXT:    pcmpeqb %xmm3, %xmm2
 ; X64-SSE2-NEXT:    pand %xmm1, %xmm2
 ; X64-SSE2-NEXT:    pand %xmm0, %xmm2
 ; X64-SSE2-NEXT:    pand %xmm4, %xmm2
 ; X64-SSE2-NEXT:    pmovmskb %xmm2, %eax
 ; X64-SSE2-NEXT:    cmpl $65535, %eax # imm = 0xFFFF
 ; X64-SSE2-NEXT:    setne %al
 ; X64-SSE2-NEXT:    retq
 ;
 ; X64-SSE41-LABEL: length63_eq:
 ; X64-SSE41:       # %bb.0:
 ; X64-SSE41-NEXT:    movdqu (%rdi), %xmm0
 ; X64-SSE41-NEXT:    movdqu 16(%rdi), %xmm1
 ; X64-SSE41-NEXT:    movdqu 32(%rdi), %xmm2
 ; X64-SSE41-NEXT:    movdqu 47(%rdi), %xmm3
 ; X64-SSE41-NEXT:    movdqu (%rsi), %xmm4
 ; X64-SSE41-NEXT:    pxor %xmm0, %xmm4
 ; X64-SSE41-NEXT:    movdqu 16(%rsi), %xmm0
 ; X64-SSE41-NEXT:    pxor %xmm1, %xmm0
 ; X64-SSE41-NEXT:    movdqu 32(%rsi), %xmm1
 ; X64-SSE41-NEXT:    pxor %xmm2, %xmm1
 ; X64-SSE41-NEXT:    movdqu 47(%rsi), %xmm2
 ; X64-SSE41-NEXT:    pxor %xmm3, %xmm2
 ; X64-SSE41-NEXT:    por %xmm1, %xmm2
 ; X64-SSE41-NEXT:    por %xmm0, %xmm2
 ; X64-SSE41-NEXT:    por %xmm4, %xmm2
 ; X64-SSE41-NEXT:    ptest %xmm2, %xmm2
 ; X64-SSE41-NEXT:    setne %al
 ; X64-SSE41-NEXT:    retq
 ;
 ; X64-AVX1-LABEL: length63_eq:
 ; X64-AVX1:       # %bb.0:
 ; X64-AVX1-NEXT:    vmovups (%rdi), %ymm0
 ; X64-AVX1-NEXT:    vmovups 31(%rdi), %ymm1
 ; X64-AVX1-NEXT:    vxorps 31(%rsi), %ymm1, %ymm1
 ; X64-AVX1-NEXT:    vxorps (%rsi), %ymm0, %ymm0
 ; X64-AVX1-NEXT:    vorps %ymm1, %ymm0, %ymm0
 ; X64-AVX1-NEXT:    vptest %ymm0, %ymm0
 ; X64-AVX1-NEXT:    setne %al
 ; X64-AVX1-NEXT:    vzeroupper
 ; X64-AVX1-NEXT:    retq
 ;
 ; X64-AVX2-LABEL: length63_eq:
 ; X64-AVX2:       # %bb.0:
 ; X64-AVX2-NEXT:    vmovdqu (%rdi), %ymm0
 ; X64-AVX2-NEXT:    vmovdqu 31(%rdi), %ymm1
 ; X64-AVX2-NEXT:    vpxor 31(%rsi), %ymm1, %ymm1
 ; X64-AVX2-NEXT:    vpxor (%rsi), %ymm0, %ymm0
 ; X64-AVX2-NEXT:    vpor %ymm1, %ymm0, %ymm0
 ; X64-AVX2-NEXT:    vptest %ymm0, %ymm0
 ; X64-AVX2-NEXT:    setne %al
 ; X64-AVX2-NEXT:    vzeroupper
 ; X64-AVX2-NEXT:    retq
 ;
 ; X64-AVX512-LABEL: length63_eq:
 ; X64-AVX512:       # %bb.0:
 ; X64-AVX512-NEXT:    vmovdqu (%rdi), %ymm0
 ; X64-AVX512-NEXT:    vmovdqu 31(%rdi), %ymm1
 ; X64-AVX512-NEXT:    vpxor 31(%rsi), %ymm1, %ymm1
 ; X64-AVX512-NEXT:    vpxor (%rsi), %ymm0, %ymm0
 ; X64-AVX512-NEXT:    vpor %ymm1, %ymm0, %ymm0
 ; X64-AVX512-NEXT:    vptest %ymm0, %ymm0
 ; X64-AVX512-NEXT:    setne %al
 ; X64-AVX512-NEXT:    vzeroupper
 ; X64-AVX512-NEXT:    retq
 ;
 ; X64-MIC-AVX-LABEL: length63_eq:
 ; X64-MIC-AVX:       # %bb.0:
 ; X64-MIC-AVX-NEXT:    vmovdqu (%rdi), %ymm0
 ; X64-MIC-AVX-NEXT:    vmovdqu 31(%rdi), %ymm1
 ; X64-MIC-AVX-NEXT:    vmovdqu (%rsi), %ymm2
 ; X64-MIC-AVX-NEXT:    vmovdqu 31(%rsi), %ymm3
 ; X64-MIC-AVX-NEXT:    vpcmpneqd %zmm3, %zmm1, %k0
 ; X64-MIC-AVX-NEXT:    vpcmpneqd %zmm2, %zmm0, %k1
 ; X64-MIC-AVX-NEXT:    kortestw %k0, %k1
 ; X64-MIC-AVX-NEXT:    setne %al
 ; X64-MIC-AVX-NEXT:    vzeroupper
 ; X64-MIC-AVX-NEXT:    retq
   %call = tail call i32 @memcmp(i8* %x, i8* %y, i64 63) nounwind
   %cmp = icmp ne i32 %call, 0
   ret i1 %cmp
 }

 define i1 @length63_lt(i8* %x, i8* %y) nounwind {
 ; X86-LABEL: length63_lt:
 ; X86:       # %bb.0:
 ; X86-NEXT:    pushl $0
 ; X86-NEXT:    pushl $63
 ; X86-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NEXT:    calll memcmp
 ; X86-NEXT:    addl $16, %esp
 ; X86-NEXT:    shrl $31, %eax
 ; X86-NEXT:    # kill: def $al killed $al killed $eax
 ; X86-NEXT:    retl
 ;
 ; X64-LABEL: length63_lt:
 ; X64:       # %bb.0:
 ; X64-NEXT:    pushq %rax
 ; X64-NEXT:    movl $63, %edx
 ; X64-NEXT:    callq memcmp
 ; X64-NEXT:    shrl $31, %eax
 ; X64-NEXT:    # kill: def $al killed $al killed $eax
 ; X64-NEXT:    popq %rcx
 ; X64-NEXT:    retq
   %call = tail call i32 @memcmp(i8* %x, i8* %y, i64 63) nounwind
   %cmp = icmp slt i32 %call, 0
   ret i1 %cmp
 }

 define i1 @length63_gt(i8* %x, i8* %y) nounwind {
 ; X86-LABEL: length63_gt:
 ; X86:       # %bb.0:
 ; X86-NEXT:    pushl $0
 ; X86-NEXT:    pushl $63
 ; X86-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NEXT:    calll memcmp
 ; X86-NEXT:    addl $16, %esp
 ; X86-NEXT:    testl %eax, %eax
 ; X86-NEXT:    setg %al
 ; X86-NEXT:    retl
 ;
 ; X64-LABEL: length63_gt:
 ; X64:       # %bb.0:
 ; X64-NEXT:    pushq %rax
 ; X64-NEXT:    movl $63, %edx
 ; X64-NEXT:    callq memcmp
 ; X64-NEXT:    testl %eax, %eax
 ; X64-NEXT:    setg %al
 ; X64-NEXT:    popq %rcx
 ; X64-NEXT:    retq
   %call = tail call i32 @memcmp(i8* %x, i8* %y, i64 63) nounwind
   %cmp = icmp sgt i32 %call, 0
   ret i1 %cmp
 }

 define i1 @length63_eq_const(i8* %X) nounwind {
 ; X86-NOSSE-LABEL: length63_eq_const:
 ; X86-NOSSE:       # %bb.0:
 ; X86-NOSSE-NEXT:    pushl $0
 ; X86-NOSSE-NEXT:    pushl $63
 ; X86-NOSSE-NEXT:    pushl $.L.str
 ; X86-NOSSE-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NOSSE-NEXT:    calll memcmp
 ; X86-NOSSE-NEXT:    addl $16, %esp
 ; X86-NOSSE-NEXT:    testl %eax, %eax
 ; X86-NOSSE-NEXT:    sete %al
 ; X86-NOSSE-NEXT:    retl
 ;
 ; X86-SSE1-LABEL: length63_eq_const:
 ; X86-SSE1:       # %bb.0:
 ; X86-SSE1-NEXT:    pushl $0
 ; X86-SSE1-NEXT:    pushl $63
 ; X86-SSE1-NEXT:    pushl $.L.str
 ; X86-SSE1-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-SSE1-NEXT:    calll memcmp
 ; X86-SSE1-NEXT:    addl $16, %esp
 ; X86-SSE1-NEXT:    testl %eax, %eax
 ; X86-SSE1-NEXT:    sete %al
 ; X86-SSE1-NEXT:    retl
 ;
 ; X86-SSE2-LABEL: length63_eq_const:
 ; X86-SSE2:       # %bb.0:
 ; X86-SSE2-NEXT:    movl {{[0-9]+}}(%esp), %eax
 ; X86-SSE2-NEXT:    movdqu (%eax), %xmm0
 ; X86-SSE2-NEXT:    movdqu 16(%eax), %xmm1
 ; X86-SSE2-NEXT:    movdqu 32(%eax), %xmm2
 ; X86-SSE2-NEXT:    movdqu 47(%eax), %xmm3
 ; X86-SSE2-NEXT:    pcmpeqb {{\.LCPI.*}}, %xmm3
 ; X86-SSE2-NEXT:    pcmpeqb {{\.LCPI.*}}, %xmm2
 ; X86-SSE2-NEXT:    pand %xmm3, %xmm2
 ; X86-SSE2-NEXT:    pcmpeqb {{\.LCPI.*}}, %xmm1
 ; X86-SSE2-NEXT:    pand %xmm2, %xmm1
 ; X86-SSE2-NEXT:    pcmpeqb {{\.LCPI.*}}, %xmm0
 ; X86-SSE2-NEXT:    pand %xmm1, %xmm0
 ; X86-SSE2-NEXT:    pmovmskb %xmm0, %eax
 ; X86-SSE2-NEXT:    cmpl $65535, %eax # imm = 0xFFFF
 ; X86-SSE2-NEXT:    sete %al
 ; X86-SSE2-NEXT:    retl
 ;
 ; X86-SSE41-LABEL: length63_eq_const:
 ; X86-SSE41:       # %bb.0:
 ; X86-SSE41-NEXT:    movl {{[0-9]+}}(%esp), %eax
 ; X86-SSE41-NEXT:    movdqu (%eax), %xmm0
 ; X86-SSE41-NEXT:    movdqu 16(%eax), %xmm1
 ; X86-SSE41-NEXT:    movdqu 32(%eax), %xmm2
 ; X86-SSE41-NEXT:    movdqu 47(%eax), %xmm3
 ; X86-SSE41-NEXT:    pxor {{\.LCPI.*}}, %xmm3
 ; X86-SSE41-NEXT:    pxor {{\.LCPI.*}}, %xmm2
 ; X86-SSE41-NEXT:    por %xmm3, %xmm2
 ; X86-SSE41-NEXT:    pxor {{\.LCPI.*}}, %xmm1
 ; X86-SSE41-NEXT:    por %xmm2, %xmm1
 ; X86-SSE41-NEXT:    pxor {{\.LCPI.*}}, %xmm0
 ; X86-SSE41-NEXT:    por %xmm1, %xmm0
 ; X86-SSE41-NEXT:    ptest %xmm0, %xmm0
 ; X86-SSE41-NEXT:    sete %al
 ; X86-SSE41-NEXT:    retl
 ;
 ; X64-SSE2-LABEL: length63_eq_const:
 ; X64-SSE2:       # %bb.0:
 ; X64-SSE2-NEXT:    movdqu (%rdi), %xmm0
 ; X64-SSE2-NEXT:    movdqu 16(%rdi), %xmm1
 ; X64-SSE2-NEXT:    movdqu 32(%rdi), %xmm2
 ; X64-SSE2-NEXT:    movdqu 47(%rdi), %xmm3
 ; X64-SSE2-NEXT:    pcmpeqb {{.*}}(%rip), %xmm3
 ; X64-SSE2-NEXT:    pcmpeqb {{.*}}(%rip), %xmm2
 ; X64-SSE2-NEXT:    pand %xmm3, %xmm2
 ; X64-SSE2-NEXT:    pcmpeqb {{.*}}(%rip), %xmm1
 ; X64-SSE2-NEXT:    pand %xmm2, %xmm1
 ; X64-SSE2-NEXT:    pcmpeqb {{.*}}(%rip), %xmm0
 ; X64-SSE2-NEXT:    pand %xmm1, %xmm0
 ; X64-SSE2-NEXT:    pmovmskb %xmm0, %eax
 ; X64-SSE2-NEXT:    cmpl $65535, %eax # imm = 0xFFFF
 ; X64-SSE2-NEXT:    sete %al
 ; X64-SSE2-NEXT:    retq
 ;
 ; X64-SSE41-LABEL: length63_eq_const:
 ; X64-SSE41:       # %bb.0:
 ; X64-SSE41-NEXT:    movdqu (%rdi), %xmm0
 ; X64-SSE41-NEXT:    movdqu 16(%rdi), %xmm1
 ; X64-SSE41-NEXT:    movdqu 32(%rdi), %xmm2
 ; X64-SSE41-NEXT:    movdqu 47(%rdi), %xmm3
 ; X64-SSE41-NEXT:    pxor {{.*}}(%rip), %xmm3
 ; X64-SSE41-NEXT:    pxor {{.*}}(%rip), %xmm2
 ; X64-SSE41-NEXT:    por %xmm3, %xmm2
 ; X64-SSE41-NEXT:    pxor {{.*}}(%rip), %xmm1
 ; X64-SSE41-NEXT:    por %xmm2, %xmm1
 ; X64-SSE41-NEXT:    pxor {{.*}}(%rip), %xmm0
 ; X64-SSE41-NEXT:    por %xmm1, %xmm0
 ; X64-SSE41-NEXT:    ptest %xmm0, %xmm0
 ; X64-SSE41-NEXT:    sete %al
 ; X64-SSE41-NEXT:    retq
 ;
 ; X64-AVX1-LABEL: length63_eq_const:
 ; X64-AVX1:       # %bb.0:
 ; X64-AVX1-NEXT:    vmovups (%rdi), %ymm0
 ; X64-AVX1-NEXT:    vmovups 31(%rdi), %ymm1
 ; X64-AVX1-NEXT:    vxorps {{.*}}(%rip), %ymm1, %ymm1
 ; X64-AVX1-NEXT:    vxorps {{.*}}(%rip), %ymm0, %ymm0
 ; X64-AVX1-NEXT:    vorps %ymm1, %ymm0, %ymm0
 ; X64-AVX1-NEXT:    vptest %ymm0, %ymm0
 ; X64-AVX1-NEXT:    sete %al
 ; X64-AVX1-NEXT:    vzeroupper
 ; X64-AVX1-NEXT:    retq
 ;
 ; X64-AVX2-LABEL: length63_eq_const:
 ; X64-AVX2:       # %bb.0:
 ; X64-AVX2-NEXT:    vmovdqu (%rdi), %ymm0
 ; X64-AVX2-NEXT:    vmovdqu 31(%rdi), %ymm1
 ; X64-AVX2-NEXT:    vpxor {{.*}}(%rip), %ymm1, %ymm1
 ; X64-AVX2-NEXT:    vpxor {{.*}}(%rip), %ymm0, %ymm0
 ; X64-AVX2-NEXT:    vpor %ymm1, %ymm0, %ymm0
 ; X64-AVX2-NEXT:    vptest %ymm0, %ymm0
 ; X64-AVX2-NEXT:    sete %al
 ; X64-AVX2-NEXT:    vzeroupper
 ; X64-AVX2-NEXT:    retq
 ;
 ; X64-AVX512-LABEL: length63_eq_const:
 ; X64-AVX512:       # %bb.0:
 ; X64-AVX512-NEXT:    vmovdqu (%rdi), %ymm0
 ; X64-AVX512-NEXT:    vmovdqu 31(%rdi), %ymm1
 ; X64-AVX512-NEXT:    vpxor {{.*}}(%rip), %ymm1, %ymm1
 ; X64-AVX512-NEXT:    vpxor {{.*}}(%rip), %ymm0, %ymm0
 ; X64-AVX512-NEXT:    vpor %ymm1, %ymm0, %ymm0
 ; X64-AVX512-NEXT:    vptest %ymm0, %ymm0
 ; X64-AVX512-NEXT:    sete %al
 ; X64-AVX512-NEXT:    vzeroupper
 ; X64-AVX512-NEXT:    retq
 ;
 ; X64-MIC-AVX-LABEL: length63_eq_const:
 ; X64-MIC-AVX:       # %bb.0:
 ; X64-MIC-AVX-NEXT:    vmovdqu (%rdi), %ymm0
 ; X64-MIC-AVX-NEXT:    vmovdqu 31(%rdi), %ymm1
 ; X64-MIC-AVX-NEXT:    vmovdqa {{.*#+}} ymm2 = [875770417,943142453,842084409,909456435,809056311,875770417,943142453,842084409]
 ; X64-MIC-AVX-NEXT:    vpcmpneqd %zmm2, %zmm1, %k0
 ; X64-MIC-AVX-NEXT:    vmovdqa {{.*#+}} ymm1 = [858927408,926299444,825243960,892613426,959985462,858927408,926299444,825243960]
 ; X64-MIC-AVX-NEXT:    vpcmpneqd %zmm1, %zmm0, %k1
 ; X64-MIC-AVX-NEXT:    kortestw %k0, %k1
 ; X64-MIC-AVX-NEXT:    sete %al
 ; X64-MIC-AVX-NEXT:    vzeroupper
 ; X64-MIC-AVX-NEXT:    retq
   %m = tail call i32 @memcmp(i8* %X, i8* getelementptr inbounds ([513 x i8], [513 x i8]* @.str, i32 0, i32 0), i64 63) nounwind
   %c = icmp eq i32 %m, 0
   ret i1 %c
 }

 define i32 @length64(i8* %X, i8* %Y) nounwind {
 ; X86-LABEL: length64:
 ; X86:       # %bb.0:
 ; X86-NEXT:    pushl $0
 ; X86-NEXT:    pushl $64
 ; X86-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NEXT:    calll memcmp
 ; X86-NEXT:    addl $16, %esp
 ; X86-NEXT:    retl
 ;
 ; X64-LABEL: length64:
 ; X64:       # %bb.0:
 ; X64-NEXT:    movl $64, %edx
 ; X64-NEXT:    jmp memcmp # TAILCALL
   %m = tail call i32 @memcmp(i8* %X, i8* %Y, i64 64) nounwind
   ret i32 %m
 }

 define i1 @length64_eq(i8* %x, i8* %y) nounwind {
 ; X86-NOSSE-LABEL: length64_eq:
 ; X86-NOSSE:       # %bb.0:
 ; X86-NOSSE-NEXT:    pushl $0
 ; X86-NOSSE-NEXT:    pushl $64
 ; X86-NOSSE-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NOSSE-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NOSSE-NEXT:    calll memcmp
 ; X86-NOSSE-NEXT:    addl $16, %esp
 ; X86-NOSSE-NEXT:    testl %eax, %eax
 ; X86-NOSSE-NEXT:    setne %al
 ; X86-NOSSE-NEXT:    retl
 ;
 ; X86-SSE1-LABEL: length64_eq:
 ; X86-SSE1:       # %bb.0:
 ; X86-SSE1-NEXT:    pushl $0
 ; X86-SSE1-NEXT:    pushl $64
 ; X86-SSE1-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-SSE1-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-SSE1-NEXT:    calll memcmp
 ; X86-SSE1-NEXT:    addl $16, %esp
 ; X86-SSE1-NEXT:    testl %eax, %eax
 ; X86-SSE1-NEXT:    setne %al
 ; X86-SSE1-NEXT:    retl
 ;
 ; X86-SSE2-LABEL: length64_eq:
 ; X86-SSE2:       # %bb.0:
 ; X86-SSE2-NEXT:    movl {{[0-9]+}}(%esp), %eax
 ; X86-SSE2-NEXT:    movl {{[0-9]+}}(%esp), %ecx
 ; X86-SSE2-NEXT:    movdqu (%ecx), %xmm0
 ; X86-SSE2-NEXT:    movdqu 16(%ecx), %xmm1
 ; X86-SSE2-NEXT:    movdqu (%eax), %xmm2
 ; X86-SSE2-NEXT:    pcmpeqb %xmm0, %xmm2
 ; X86-SSE2-NEXT:    movdqu 16(%eax), %xmm0
 ; X86-SSE2-NEXT:    pcmpeqb %xmm1, %xmm0
 ; X86-SSE2-NEXT:    movdqu 32(%ecx), %xmm1
 ; X86-SSE2-NEXT:    movdqu 32(%eax), %xmm3
 ; X86-SSE2-NEXT:    pcmpeqb %xmm1, %xmm3
 ; X86-SSE2-NEXT:    movdqu 48(%ecx), %xmm1
 ; X86-SSE2-NEXT:    movdqu 48(%eax), %xmm4
 ; X86-SSE2-NEXT:    pcmpeqb %xmm1, %xmm4
 ; X86-SSE2-NEXT:    pand %xmm3, %xmm4
 ; X86-SSE2-NEXT:    pand %xmm0, %xmm4
 ; X86-SSE2-NEXT:    pand %xmm2, %xmm4
 ; X86-SSE2-NEXT:    pmovmskb %xmm4, %eax
 ; X86-SSE2-NEXT:    cmpl $65535, %eax # imm = 0xFFFF
 ; X86-SSE2-NEXT:    setne %al
 ; X86-SSE2-NEXT:    retl
 ;
 ; X86-SSE41-LABEL: length64_eq:
 ; X86-SSE41:       # %bb.0:
 ; X86-SSE41-NEXT:    movl {{[0-9]+}}(%esp), %eax
 ; X86-SSE41-NEXT:    movl {{[0-9]+}}(%esp), %ecx
 ; X86-SSE41-NEXT:    movdqu (%ecx), %xmm0
 ; X86-SSE41-NEXT:    movdqu 16(%ecx), %xmm1
 ; X86-SSE41-NEXT:    movdqu (%eax), %xmm2
 ; X86-SSE41-NEXT:    pxor %xmm0, %xmm2
 ; X86-SSE41-NEXT:    movdqu 16(%eax), %xmm0
 ; X86-SSE41-NEXT:    pxor %xmm1, %xmm0
 ; X86-SSE41-NEXT:    movdqu 32(%ecx), %xmm1
 ; X86-SSE41-NEXT:    movdqu 32(%eax), %xmm3
 ; X86-SSE41-NEXT:    pxor %xmm1, %xmm3
 ; X86-SSE41-NEXT:    movdqu 48(%ecx), %xmm1
 ; X86-SSE41-NEXT:    movdqu 48(%eax), %xmm4
 ; X86-SSE41-NEXT:    pxor %xmm1, %xmm4
 ; X86-SSE41-NEXT:    por %xmm3, %xmm4
 ; X86-SSE41-NEXT:    por %xmm0, %xmm4
 ; X86-SSE41-NEXT:    por %xmm2, %xmm4
 ; X86-SSE41-NEXT:    ptest %xmm4, %xmm4
 ; X86-SSE41-NEXT:    setne %al
 ; X86-SSE41-NEXT:    retl
 ;
 ; X64-SSE2-LABEL: length64_eq:
 ; X64-SSE2:       # %bb.0:
 ; X64-SSE2-NEXT:    movdqu (%rdi), %xmm0
 ; X64-SSE2-NEXT:    movdqu 16(%rdi), %xmm1
 ; X64-SSE2-NEXT:    movdqu 32(%rdi), %xmm2
 ; X64-SSE2-NEXT:    movdqu 48(%rdi), %xmm3
 ; X64-SSE2-NEXT:    movdqu (%rsi), %xmm4
 ; X64-SSE2-NEXT:    pcmpeqb %xmm0, %xmm4
 ; X64-SSE2-NEXT:    movdqu 16(%rsi), %xmm0
 ; X64-SSE2-NEXT:    pcmpeqb %xmm1, %xmm0
 ; X64-SSE2-NEXT:    movdqu 32(%rsi), %xmm1
 ; X64-SSE2-NEXT:    pcmpeqb %xmm2, %xmm1
 ; X64-SSE2-NEXT:    movdqu 48(%rsi), %xmm2
 ; X64-SSE2-NEXT:    pcmpeqb %xmm3, %xmm2
 ; X64-SSE2-NEXT:    pand %xmm1, %xmm2
 ; X64-SSE2-NEXT:    pand %xmm0, %xmm2
 ; X64-SSE2-NEXT:    pand %xmm4, %xmm2
 ; X64-SSE2-NEXT:    pmovmskb %xmm2, %eax
 ; X64-SSE2-NEXT:    cmpl $65535, %eax # imm = 0xFFFF
 ; X64-SSE2-NEXT:    setne %al
 ; X64-SSE2-NEXT:    retq
 ;
 ; X64-SSE41-LABEL: length64_eq:
 ; X64-SSE41:       # %bb.0:
 ; X64-SSE41-NEXT:    movdqu (%rdi), %xmm0
 ; X64-SSE41-NEXT:    movdqu 16(%rdi), %xmm1
 ; X64-SSE41-NEXT:    movdqu 32(%rdi), %xmm2
 ; X64-SSE41-NEXT:    movdqu 48(%rdi), %xmm3
 ; X64-SSE41-NEXT:    movdqu (%rsi), %xmm4
 ; X64-SSE41-NEXT:    pxor %xmm0, %xmm4
 ; X64-SSE41-NEXT:    movdqu 16(%rsi), %xmm0
 ; X64-SSE41-NEXT:    pxor %xmm1, %xmm0
 ; X64-SSE41-NEXT:    movdqu 32(%rsi), %xmm1
 ; X64-SSE41-NEXT:    pxor %xmm2, %xmm1
 ; X64-SSE41-NEXT:    movdqu 48(%rsi), %xmm2
 ; X64-SSE41-NEXT:    pxor %xmm3, %xmm2
 ; X64-SSE41-NEXT:    por %xmm1, %xmm2
 ; X64-SSE41-NEXT:    por %xmm0, %xmm2
 ; X64-SSE41-NEXT:    por %xmm4, %xmm2
 ; X64-SSE41-NEXT:    ptest %xmm2, %xmm2
 ; X64-SSE41-NEXT:    setne %al
 ; X64-SSE41-NEXT:    retq
 ;
 ; X64-AVX1-LABEL: length64_eq:
 ; X64-AVX1:       # %bb.0:
 ; X64-AVX1-NEXT:    vmovups (%rdi), %ymm0
 ; X64-AVX1-NEXT:    vmovups 32(%rdi), %ymm1
 ; X64-AVX1-NEXT:    vxorps 32(%rsi), %ymm1, %ymm1
 ; X64-AVX1-NEXT:    vxorps (%rsi), %ymm0, %ymm0
 ; X64-AVX1-NEXT:    vorps %ymm1, %ymm0, %ymm0
 ; X64-AVX1-NEXT:    vptest %ymm0, %ymm0
 ; X64-AVX1-NEXT:    setne %al
 ; X64-AVX1-NEXT:    vzeroupper
 ; X64-AVX1-NEXT:    retq
 ;
 ; X64-AVX2-LABEL: length64_eq:
 ; X64-AVX2:       # %bb.0:
 ; X64-AVX2-NEXT:    vmovdqu (%rdi), %ymm0
 ; X64-AVX2-NEXT:    vmovdqu 32(%rdi), %ymm1
 ; X64-AVX2-NEXT:    vpxor 32(%rsi), %ymm1, %ymm1
 ; X64-AVX2-NEXT:    vpxor (%rsi), %ymm0, %ymm0
 ; X64-AVX2-NEXT:    vpor %ymm1, %ymm0, %ymm0
 ; X64-AVX2-NEXT:    vptest %ymm0, %ymm0
 ; X64-AVX2-NEXT:    setne %al
 ; X64-AVX2-NEXT:    vzeroupper
 ; X64-AVX2-NEXT:    retq
 ;
 ; X64-AVX512BW-LABEL: length64_eq:
 ; X64-AVX512BW:       # %bb.0:
 ; X64-AVX512BW-NEXT:    vmovdqu64 (%rdi), %zmm0
 ; X64-AVX512BW-NEXT:    vpcmpneqb (%rsi), %zmm0, %k0
 ; X64-AVX512BW-NEXT:    kortestq %k0, %k0
 ; X64-AVX512BW-NEXT:    setne %al
 ; X64-AVX512BW-NEXT:    vzeroupper
 ; X64-AVX512BW-NEXT:    retq
 ;
 ; X64-AVX512F-LABEL: length64_eq:
 ; X64-AVX512F:       # %bb.0:
 ; X64-AVX512F-NEXT:    vmovdqu64 (%rdi), %zmm0
 ; X64-AVX512F-NEXT:    vpcmpneqd (%rsi), %zmm0, %k0
 ; X64-AVX512F-NEXT:    kortestw %k0, %k0
 ; X64-AVX512F-NEXT:    setne %al
 ; X64-AVX512F-NEXT:    vzeroupper
 ; X64-AVX512F-NEXT:    retq
 ;
 ; X64-MIC-AVX2-LABEL: length64_eq:
 ; X64-MIC-AVX2:       # %bb.0:
 ; X64-MIC-AVX2-NEXT:    vmovdqu (%rdi), %ymm0
 ; X64-MIC-AVX2-NEXT:    vmovdqu 32(%rdi), %ymm1
 ; X64-MIC-AVX2-NEXT:    vmovdqu (%rsi), %ymm2
 ; X64-MIC-AVX2-NEXT:    vmovdqu 32(%rsi), %ymm3
 ; X64-MIC-AVX2-NEXT:    vpcmpneqd %zmm3, %zmm1, %k0
 ; X64-MIC-AVX2-NEXT:    vpcmpneqd %zmm2, %zmm0, %k1
 ; X64-MIC-AVX2-NEXT:    kortestw %k0, %k1
 ; X64-MIC-AVX2-NEXT:    setne %al
 ; X64-MIC-AVX2-NEXT:    vzeroupper
 ; X64-MIC-AVX2-NEXT:    retq
 ;
 ; X64-MIC-AVX512F-LABEL: length64_eq:
 ; X64-MIC-AVX512F:       # %bb.0:
 ; X64-MIC-AVX512F-NEXT:    vmovdqu64 (%rdi), %zmm0
 ; X64-MIC-AVX512F-NEXT:    vpcmpneqd (%rsi), %zmm0, %k0
 ; X64-MIC-AVX512F-NEXT:    kortestw %k0, %k0
 ; X64-MIC-AVX512F-NEXT:    setne %al
 ; X64-MIC-AVX512F-NEXT:    vzeroupper
 ; X64-MIC-AVX512F-NEXT:    retq
   %call = tail call i32 @memcmp(i8* %x, i8* %y, i64 64) nounwind
   %cmp = icmp ne i32 %call, 0
   ret i1 %cmp
 }

 define i1 @length64_lt(i8* %x, i8* %y) nounwind {
 ; X86-LABEL: length64_lt:
 ; X86:       # %bb.0:
 ; X86-NEXT:    pushl $0
 ; X86-NEXT:    pushl $64
 ; X86-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NEXT:    calll memcmp
 ; X86-NEXT:    addl $16, %esp
 ; X86-NEXT:    shrl $31, %eax
 ; X86-NEXT:    # kill: def $al killed $al killed $eax
 ; X86-NEXT:    retl
 ;
 ; X64-LABEL: length64_lt:
 ; X64:       # %bb.0:
 ; X64-NEXT:    pushq %rax
 ; X64-NEXT:    movl $64, %edx
 ; X64-NEXT:    callq memcmp
 ; X64-NEXT:    shrl $31, %eax
 ; X64-NEXT:    # kill: def $al killed $al killed $eax
 ; X64-NEXT:    popq %rcx
 ; X64-NEXT:    retq
   %call = tail call i32 @memcmp(i8* %x, i8* %y, i64 64) nounwind
   %cmp = icmp slt i32 %call, 0
   ret i1 %cmp
 }

 define i1 @length64_gt(i8* %x, i8* %y) nounwind {
 ; X86-LABEL: length64_gt:
 ; X86:       # %bb.0:
 ; X86-NEXT:    pushl $0
 ; X86-NEXT:    pushl $64
 ; X86-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NEXT:    calll memcmp
 ; X86-NEXT:    addl $16, %esp
 ; X86-NEXT:    testl %eax, %eax
 ; X86-NEXT:    setg %al
 ; X86-NEXT:    retl
 ;
 ; X64-LABEL: length64_gt:
 ; X64:       # %bb.0:
 ; X64-NEXT:    pushq %rax
 ; X64-NEXT:    movl $64, %edx
 ; X64-NEXT:    callq memcmp
 ; X64-NEXT:    testl %eax, %eax
 ; X64-NEXT:    setg %al
 ; X64-NEXT:    popq %rcx
 ; X64-NEXT:    retq
   %call = tail call i32 @memcmp(i8* %x, i8* %y, i64 64) nounwind
   %cmp = icmp sgt i32 %call, 0
   ret i1 %cmp
 }

 define i1 @length64_eq_const(i8* %X) nounwind {
 ; X86-NOSSE-LABEL: length64_eq_const:
 ; X86-NOSSE:       # %bb.0:
 ; X86-NOSSE-NEXT:    pushl $0
 ; X86-NOSSE-NEXT:    pushl $64
 ; X86-NOSSE-NEXT:    pushl $.L.str
 ; X86-NOSSE-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NOSSE-NEXT:    calll memcmp
 ; X86-NOSSE-NEXT:    addl $16, %esp
 ; X86-NOSSE-NEXT:    testl %eax, %eax
 ; X86-NOSSE-NEXT:    sete %al
 ; X86-NOSSE-NEXT:    retl
 ;
 ; X86-SSE1-LABEL: length64_eq_const:
 ; X86-SSE1:       # %bb.0:
 ; X86-SSE1-NEXT:    pushl $0
 ; X86-SSE1-NEXT:    pushl $64
 ; X86-SSE1-NEXT:    pushl $.L.str
 ; X86-SSE1-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-SSE1-NEXT:    calll memcmp
 ; X86-SSE1-NEXT:    addl $16, %esp
 ; X86-SSE1-NEXT:    testl %eax, %eax
 ; X86-SSE1-NEXT:    sete %al
 ; X86-SSE1-NEXT:    retl
 ;
 ; X86-SSE2-LABEL: length64_eq_const:
 ; X86-SSE2:       # %bb.0:
 ; X86-SSE2-NEXT:    movl {{[0-9]+}}(%esp), %eax
 ; X86-SSE2-NEXT:    movdqu (%eax), %xmm0
 ; X86-SSE2-NEXT:    movdqu 16(%eax), %xmm1
 ; X86-SSE2-NEXT:    movdqu 32(%eax), %xmm2
 ; X86-SSE2-NEXT:    movdqu 48(%eax), %xmm3
 ; X86-SSE2-NEXT:    pcmpeqb {{\.LCPI.*}}, %xmm3
 ; X86-SSE2-NEXT:    pcmpeqb {{\.LCPI.*}}, %xmm2
 ; X86-SSE2-NEXT:    pand %xmm3, %xmm2
 ; X86-SSE2-NEXT:    pcmpeqb {{\.LCPI.*}}, %xmm1
 ; X86-SSE2-NEXT:    pand %xmm2, %xmm1
 ; X86-SSE2-NEXT:    pcmpeqb {{\.LCPI.*}}, %xmm0
 ; X86-SSE2-NEXT:    pand %xmm1, %xmm0
 ; X86-SSE2-NEXT:    pmovmskb %xmm0, %eax
 ; X86-SSE2-NEXT:    cmpl $65535, %eax # imm = 0xFFFF
 ; X86-SSE2-NEXT:    sete %al
 ; X86-SSE2-NEXT:    retl
 ;
 ; X86-SSE41-LABEL: length64_eq_const:
 ; X86-SSE41:       # %bb.0:
 ; X86-SSE41-NEXT:    movl {{[0-9]+}}(%esp), %eax
 ; X86-SSE41-NEXT:    movdqu (%eax), %xmm0
 ; X86-SSE41-NEXT:    movdqu 16(%eax), %xmm1
 ; X86-SSE41-NEXT:    movdqu 32(%eax), %xmm2
 ; X86-SSE41-NEXT:    movdqu 48(%eax), %xmm3
 ; X86-SSE41-NEXT:    pxor {{\.LCPI.*}}, %xmm3
 ; X86-SSE41-NEXT:    pxor {{\.LCPI.*}}, %xmm2
 ; X86-SSE41-NEXT:    por %xmm3, %xmm2
 ; X86-SSE41-NEXT:    pxor {{\.LCPI.*}}, %xmm1
 ; X86-SSE41-NEXT:    por %xmm2, %xmm1
 ; X86-SSE41-NEXT:    pxor {{\.LCPI.*}}, %xmm0
 ; X86-SSE41-NEXT:    por %xmm1, %xmm0
 ; X86-SSE41-NEXT:    ptest %xmm0, %xmm0
 ; X86-SSE41-NEXT:    sete %al
 ; X86-SSE41-NEXT:    retl
 ;
 ; X64-SSE2-LABEL: length64_eq_const:
 ; X64-SSE2:       # %bb.0:
 ; X64-SSE2-NEXT:    movdqu (%rdi), %xmm0
 ; X64-SSE2-NEXT:    movdqu 16(%rdi), %xmm1
 ; X64-SSE2-NEXT:    movdqu 32(%rdi), %xmm2
 ; X64-SSE2-NEXT:    movdqu 48(%rdi), %xmm3
 ; X64-SSE2-NEXT:    pcmpeqb {{.*}}(%rip), %xmm3
 ; X64-SSE2-NEXT:    pcmpeqb {{.*}}(%rip), %xmm2
 ; X64-SSE2-NEXT:    pand %xmm3, %xmm2
 ; X64-SSE2-NEXT:    pcmpeqb {{.*}}(%rip), %xmm1
 ; X64-SSE2-NEXT:    pand %xmm2, %xmm1
 ; X64-SSE2-NEXT:    pcmpeqb {{.*}}(%rip), %xmm0
 ; X64-SSE2-NEXT:    pand %xmm1, %xmm0
 ; X64-SSE2-NEXT:    pmovmskb %xmm0, %eax
 ; X64-SSE2-NEXT:    cmpl $65535, %eax # imm = 0xFFFF
 ; X64-SSE2-NEXT:    sete %al
 ; X64-SSE2-NEXT:    retq
 ;
 ; X64-SSE41-LABEL: length64_eq_const:
 ; X64-SSE41:       # %bb.0:
 ; X64-SSE41-NEXT:    movdqu (%rdi), %xmm0
 ; X64-SSE41-NEXT:    movdqu 16(%rdi), %xmm1
 ; X64-SSE41-NEXT:    movdqu 32(%rdi), %xmm2
 ; X64-SSE41-NEXT:    movdqu 48(%rdi), %xmm3
 ; X64-SSE41-NEXT:    pxor {{.*}}(%rip), %xmm3
 ; X64-SSE41-NEXT:    pxor {{.*}}(%rip), %xmm2
 ; X64-SSE41-NEXT:    por %xmm3, %xmm2
 ; X64-SSE41-NEXT:    pxor {{.*}}(%rip), %xmm1
 ; X64-SSE41-NEXT:    por %xmm2, %xmm1
 ; X64-SSE41-NEXT:    pxor {{.*}}(%rip), %xmm0
 ; X64-SSE41-NEXT:    por %xmm1, %xmm0
 ; X64-SSE41-NEXT:    ptest %xmm0, %xmm0
 ; X64-SSE41-NEXT:    sete %al
 ; X64-SSE41-NEXT:    retq
 ;
 ; X64-AVX1-LABEL: length64_eq_const:
 ; X64-AVX1:       # %bb.0:
 ; X64-AVX1-NEXT:    vmovups (%rdi), %ymm0
 ; X64-AVX1-NEXT:    vmovups 32(%rdi), %ymm1
 ; X64-AVX1-NEXT:    vxorps {{.*}}(%rip), %ymm1, %ymm1
 ; X64-AVX1-NEXT:    vxorps {{.*}}(%rip), %ymm0, %ymm0
 ; X64-AVX1-NEXT:    vorps %ymm1, %ymm0, %ymm0
 ; X64-AVX1-NEXT:    vptest %ymm0, %ymm0
 ; X64-AVX1-NEXT:    sete %al
 ; X64-AVX1-NEXT:    vzeroupper
 ; X64-AVX1-NEXT:    retq
 ;
 ; X64-AVX2-LABEL: length64_eq_const:
 ; X64-AVX2:       # %bb.0:
 ; X64-AVX2-NEXT:    vmovdqu (%rdi), %ymm0
 ; X64-AVX2-NEXT:    vmovdqu 32(%rdi), %ymm1
 ; X64-AVX2-NEXT:    vpxor {{.*}}(%rip), %ymm1, %ymm1
 ; X64-AVX2-NEXT:    vpxor {{.*}}(%rip), %ymm0, %ymm0
 ; X64-AVX2-NEXT:    vpor %ymm1, %ymm0, %ymm0
 ; X64-AVX2-NEXT:    vptest %ymm0, %ymm0
 ; X64-AVX2-NEXT:    sete %al
 ; X64-AVX2-NEXT:    vzeroupper
 ; X64-AVX2-NEXT:    retq
 ;
 ; X64-AVX512BW-LABEL: length64_eq_const:
 ; X64-AVX512BW:       # %bb.0:
 ; X64-AVX512BW-NEXT:    vmovdqu64 (%rdi), %zmm0
 ; X64-AVX512BW-NEXT:    vpcmpneqb {{.*}}(%rip), %zmm0, %k0
 ; X64-AVX512BW-NEXT:    kortestq %k0, %k0
 ; X64-AVX512BW-NEXT:    sete %al
 ; X64-AVX512BW-NEXT:    vzeroupper
 ; X64-AVX512BW-NEXT:    retq
 ;
 ; X64-AVX512F-LABEL: length64_eq_const:
 ; X64-AVX512F:       # %bb.0:
 ; X64-AVX512F-NEXT:    vmovdqu64 (%rdi), %zmm0
 ; X64-AVX512F-NEXT:    vpcmpneqd {{.*}}(%rip), %zmm0, %k0
 ; X64-AVX512F-NEXT:    kortestw %k0, %k0
 ; X64-AVX512F-NEXT:    sete %al
 ; X64-AVX512F-NEXT:    vzeroupper
 ; X64-AVX512F-NEXT:    retq
 ;
 ; X64-MIC-AVX2-LABEL: length64_eq_const:
 ; X64-MIC-AVX2:       # %bb.0:
 ; X64-MIC-AVX2-NEXT:    vmovdqu (%rdi), %ymm0
 ; X64-MIC-AVX2-NEXT:    vmovdqu 32(%rdi), %ymm1
 ; X64-MIC-AVX2-NEXT:    vmovdqa {{.*#+}} ymm2 = [892613426,959985462,858927408,926299444,825243960,892613426,959985462,858927408]
 ; X64-MIC-AVX2-NEXT:    vpcmpneqd %zmm2, %zmm1, %k0
 ; X64-MIC-AVX2-NEXT:    vmovdqa {{.*#+}} ymm1 = [858927408,926299444,825243960,892613426,959985462,858927408,926299444,825243960]
 ; X64-MIC-AVX2-NEXT:    vpcmpneqd %zmm1, %zmm0, %k1
 ; X64-MIC-AVX2-NEXT:    kortestw %k0, %k1
 ; X64-MIC-AVX2-NEXT:    sete %al
 ; X64-MIC-AVX2-NEXT:    vzeroupper
 ; X64-MIC-AVX2-NEXT:    retq
 ;
 ; X64-MIC-AVX512F-LABEL: length64_eq_const:
 ; X64-MIC-AVX512F:       # %bb.0:
 ; X64-MIC-AVX512F-NEXT:    vmovdqu64 (%rdi), %zmm0
 ; X64-MIC-AVX512F-NEXT:    vpcmpneqd {{.*}}(%rip), %zmm0, %k0
 ; X64-MIC-AVX512F-NEXT:    kortestw %k0, %k0
 ; X64-MIC-AVX512F-NEXT:    sete %al
 ; X64-MIC-AVX512F-NEXT:    vzeroupper
 ; X64-MIC-AVX512F-NEXT:    retq
   %m = tail call i32 @memcmp(i8* %X, i8* getelementptr inbounds ([513 x i8], [513 x i8]* @.str, i32 0, i32 0), i64 64) nounwind
   %c = icmp eq i32 %m, 0
   ret i1 %c
 }

 define i32 @length96(i8* %X, i8* %Y) nounwind {
 ; X86-LABEL: length96:
 ; X86:       # %bb.0:
 ; X86-NEXT:    pushl $0
 ; X86-NEXT:    pushl $96
 ; X86-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NEXT:    calll memcmp
 ; X86-NEXT:    addl $16, %esp
 ; X86-NEXT:    retl
 ;
 ; X64-LABEL: length96:
 ; X64:       # %bb.0:
 ; X64-NEXT:    movl $96, %edx
 ; X64-NEXT:    jmp memcmp # TAILCALL
   %m = tail call i32 @memcmp(i8* %X, i8* %Y, i64 96) nounwind
   ret i32 %m
 }

 define i1 @length96_eq(i8* %x, i8* %y) nounwind {
 ; X86-LABEL: length96_eq:
 ; X86:       # %bb.0:
 ; X86-NEXT:    pushl $0
 ; X86-NEXT:    pushl $96
 ; X86-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NEXT:    calll memcmp
 ; X86-NEXT:    addl $16, %esp
 ; X86-NEXT:    testl %eax, %eax
 ; X86-NEXT:    setne %al
 ; X86-NEXT:    retl
 ;
 ; X64-SSE-LABEL: length96_eq:
 ; X64-SSE:       # %bb.0:
 ; X64-SSE-NEXT:    pushq %rax
 ; X64-SSE-NEXT:    movl $96, %edx
 ; X64-SSE-NEXT:    callq memcmp
 ; X64-SSE-NEXT:    testl %eax, %eax
 ; X64-SSE-NEXT:    setne %al
 ; X64-SSE-NEXT:    popq %rcx
 ; X64-SSE-NEXT:    retq
 ;
 ; X64-AVX1-LABEL: length96_eq:
 ; X64-AVX1:       # %bb.0:
 ; X64-AVX1-NEXT:    vmovups (%rdi), %ymm0
 ; X64-AVX1-NEXT:    vmovups 32(%rdi), %ymm1
 ; X64-AVX1-NEXT:    vmovups 64(%rdi), %ymm2
 ; X64-AVX1-NEXT:    vxorps 32(%rsi), %ymm1, %ymm1
 ; X64-AVX1-NEXT:    vxorps (%rsi), %ymm0, %ymm0
 ; X64-AVX1-NEXT:    vxorps 64(%rsi), %ymm2, %ymm2
 ; X64-AVX1-NEXT:    vorps %ymm2, %ymm1, %ymm1
 ; X64-AVX1-NEXT:    vorps %ymm1, %ymm0, %ymm0
 ; X64-AVX1-NEXT:    vptest %ymm0, %ymm0
 ; X64-AVX1-NEXT:    setne %al
 ; X64-AVX1-NEXT:    vzeroupper
 ; X64-AVX1-NEXT:    retq
 ;
 ; X64-AVX2-LABEL: length96_eq:
 ; X64-AVX2:       # %bb.0:
 ; X64-AVX2-NEXT:    vmovdqu (%rdi), %ymm0
 ; X64-AVX2-NEXT:    vmovdqu 32(%rdi), %ymm1
 ; X64-AVX2-NEXT:    vmovdqu 64(%rdi), %ymm2
 ; X64-AVX2-NEXT:    vpxor 32(%rsi), %ymm1, %ymm1
 ; X64-AVX2-NEXT:    vpxor (%rsi), %ymm0, %ymm0
 ; X64-AVX2-NEXT:    vpxor 64(%rsi), %ymm2, %ymm2
 ; X64-AVX2-NEXT:    vpor %ymm2, %ymm1, %ymm1
 ; X64-AVX2-NEXT:    vpor %ymm1, %ymm0, %ymm0
 ; X64-AVX2-NEXT:    vptest %ymm0, %ymm0
 ; X64-AVX2-NEXT:    setne %al
 ; X64-AVX2-NEXT:    vzeroupper
 ; X64-AVX2-NEXT:    retq
 ;
 ; X64-AVX512BW-LABEL: length96_eq:
 ; X64-AVX512BW:       # %bb.0:
 ; X64-AVX512BW-NEXT:    vmovdqu64 (%rdi), %zmm0
 ; X64-AVX512BW-NEXT:    vmovdqu 64(%rdi), %ymm1
 ; X64-AVX512BW-NEXT:    vmovdqu 64(%rsi), %ymm2
 ; X64-AVX512BW-NEXT:    vpcmpneqb (%rsi), %zmm0, %k0
 ; X64-AVX512BW-NEXT:    vpcmpneqb %zmm2, %zmm1, %k1
 ; X64-AVX512BW-NEXT:    kortestq %k1, %k0
 ; X64-AVX512BW-NEXT:    setne %al
 ; X64-AVX512BW-NEXT:    vzeroupper
 ; X64-AVX512BW-NEXT:    retq
 ;
 ; X64-AVX512F-LABEL: length96_eq:
 ; X64-AVX512F:       # %bb.0:
 ; X64-AVX512F-NEXT:    vmovdqu64 (%rdi), %zmm0
 ; X64-AVX512F-NEXT:    vmovdqu 64(%rdi), %ymm1
 ; X64-AVX512F-NEXT:    vmovdqu 64(%rsi), %ymm2
 ; X64-AVX512F-NEXT:    vpcmpneqd (%rsi), %zmm0, %k0
 ; X64-AVX512F-NEXT:    vpcmpneqd %zmm2, %zmm1, %k1
 ; X64-AVX512F-NEXT:    kortestw %k1, %k0
 ; X64-AVX512F-NEXT:    setne %al
 ; X64-AVX512F-NEXT:    vzeroupper
 ; X64-AVX512F-NEXT:    retq
 ;
 ; X64-MIC-AVX2-LABEL: length96_eq:
 ; X64-MIC-AVX2:       # %bb.0:
 ; X64-MIC-AVX2-NEXT:    vmovdqu (%rdi), %ymm0
 ; X64-MIC-AVX2-NEXT:    vmovdqu 32(%rdi), %ymm1
 ; X64-MIC-AVX2-NEXT:    vmovdqu 64(%rdi), %ymm2
 ; X64-MIC-AVX2-NEXT:    vmovdqu (%rsi), %ymm3
 ; X64-MIC-AVX2-NEXT:    vmovdqu 32(%rsi), %ymm4
 ; X64-MIC-AVX2-NEXT:    vmovdqu 64(%rsi), %ymm5
 ; X64-MIC-AVX2-NEXT:    vpcmpneqd %zmm4, %zmm1, %k0
 ; X64-MIC-AVX2-NEXT:    vpcmpneqd %zmm3, %zmm0, %k1
 ; X64-MIC-AVX2-NEXT:    korw %k0, %k1, %k0
 ; X64-MIC-AVX2-NEXT:    vpcmpneqd %zmm5, %zmm2, %k1
 ; X64-MIC-AVX2-NEXT:    kortestw %k1, %k0
 ; X64-MIC-AVX2-NEXT:    setne %al
 ; X64-MIC-AVX2-NEXT:    vzeroupper
 ; X64-MIC-AVX2-NEXT:    retq
 ;
 ; X64-MIC-AVX512F-LABEL: length96_eq:
 ; X64-MIC-AVX512F:       # %bb.0:
 ; X64-MIC-AVX512F-NEXT:    vmovdqu64 (%rdi), %zmm0
 ; X64-MIC-AVX512F-NEXT:    vmovdqu 64(%rdi), %ymm1
 ; X64-MIC-AVX512F-NEXT:    vmovdqu 64(%rsi), %ymm2
 ; X64-MIC-AVX512F-NEXT:    vpcmpneqd (%rsi), %zmm0, %k0
 ; X64-MIC-AVX512F-NEXT:    vpcmpneqd %zmm2, %zmm1, %k1
 ; X64-MIC-AVX512F-NEXT:    kortestw %k1, %k0
 ; X64-MIC-AVX512F-NEXT:    setne %al
 ; X64-MIC-AVX512F-NEXT:    vzeroupper
 ; X64-MIC-AVX512F-NEXT:    retq
   %call = tail call i32 @memcmp(i8* %x, i8* %y, i64 96) nounwind
   %cmp = icmp ne i32 %call, 0
   ret i1 %cmp
 }

 define i1 @length96_lt(i8* %x, i8* %y) nounwind {
 ; X86-LABEL: length96_lt:
 ; X86:       # %bb.0:
 ; X86-NEXT:    pushl $0
 ; X86-NEXT:    pushl $96
 ; X86-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NEXT:    calll memcmp
 ; X86-NEXT:    addl $16, %esp
 ; X86-NEXT:    shrl $31, %eax
 ; X86-NEXT:    # kill: def $al killed $al killed $eax
 ; X86-NEXT:    retl
 ;
 ; X64-LABEL: length96_lt:
 ; X64:       # %bb.0:
 ; X64-NEXT:    pushq %rax
 ; X64-NEXT:    movl $96, %edx
 ; X64-NEXT:    callq memcmp
 ; X64-NEXT:    shrl $31, %eax
 ; X64-NEXT:    # kill: def $al killed $al killed $eax
 ; X64-NEXT:    popq %rcx
 ; X64-NEXT:    retq
   %call = tail call i32 @memcmp(i8* %x, i8* %y, i64 96) nounwind
   %cmp = icmp slt i32 %call, 0
   ret i1 %cmp
 }

 define i1 @length96_gt(i8* %x, i8* %y) nounwind {
 ; X86-LABEL: length96_gt:
 ; X86:       # %bb.0:
 ; X86-NEXT:    pushl $0
 ; X86-NEXT:    pushl $96
 ; X86-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NEXT:    calll memcmp
 ; X86-NEXT:    addl $16, %esp
 ; X86-NEXT:    testl %eax, %eax
 ; X86-NEXT:    setg %al
 ; X86-NEXT:    retl
 ;
 ; X64-LABEL: length96_gt:
 ; X64:       # %bb.0:
 ; X64-NEXT:    pushq %rax
 ; X64-NEXT:    movl $96, %edx
 ; X64-NEXT:    callq memcmp
 ; X64-NEXT:    testl %eax, %eax
 ; X64-NEXT:    setg %al
 ; X64-NEXT:    popq %rcx
 ; X64-NEXT:    retq
   %call = tail call i32 @memcmp(i8* %x, i8* %y, i64 96) nounwind
   %cmp = icmp sgt i32 %call, 0
   ret i1 %cmp
 }

 define i1 @length96_eq_const(i8* %X) nounwind {
 ; X86-LABEL: length96_eq_const:
 ; X86:       # %bb.0:
 ; X86-NEXT:    pushl $0
 ; X86-NEXT:    pushl $96
 ; X86-NEXT:    pushl $.L.str
 ; X86-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NEXT:    calll memcmp
 ; X86-NEXT:    addl $16, %esp
 ; X86-NEXT:    testl %eax, %eax
 ; X86-NEXT:    sete %al
 ; X86-NEXT:    retl
 ;
 ; X64-SSE-LABEL: length96_eq_const:
 ; X64-SSE:       # %bb.0:
 ; X64-SSE-NEXT:    pushq %rax
 ; X64-SSE-NEXT:    movl $.L.str, %esi
 ; X64-SSE-NEXT:    movl $96, %edx
 ; X64-SSE-NEXT:    callq memcmp
 ; X64-SSE-NEXT:    testl %eax, %eax
 ; X64-SSE-NEXT:    sete %al
 ; X64-SSE-NEXT:    popq %rcx
 ; X64-SSE-NEXT:    retq
 ;
 ; X64-AVX1-LABEL: length96_eq_const:
 ; X64-AVX1:       # %bb.0:
 ; X64-AVX1-NEXT:    vmovups (%rdi), %ymm0
 ; X64-AVX1-NEXT:    vmovups 32(%rdi), %ymm1
 ; X64-AVX1-NEXT:    vmovups 64(%rdi), %ymm2
 ; X64-AVX1-NEXT:    vxorps {{.*}}(%rip), %ymm1, %ymm1
 ; X64-AVX1-NEXT:    vxorps {{.*}}(%rip), %ymm0, %ymm0
 ; X64-AVX1-NEXT:    vxorps {{.*}}(%rip), %ymm2, %ymm2
 ; X64-AVX1-NEXT:    vorps %ymm2, %ymm1, %ymm1
 ; X64-AVX1-NEXT:    vorps %ymm1, %ymm0, %ymm0
 ; X64-AVX1-NEXT:    vptest %ymm0, %ymm0
 ; X64-AVX1-NEXT:    sete %al
 ; X64-AVX1-NEXT:    vzeroupper
 ; X64-AVX1-NEXT:    retq
 ;
 ; X64-AVX2-LABEL: length96_eq_const:
 ; X64-AVX2:       # %bb.0:
 ; X64-AVX2-NEXT:    vmovdqu (%rdi), %ymm0
 ; X64-AVX2-NEXT:    vmovdqu 32(%rdi), %ymm1
 ; X64-AVX2-NEXT:    vmovdqu 64(%rdi), %ymm2
 ; X64-AVX2-NEXT:    vpxor {{.*}}(%rip), %ymm1, %ymm1
 ; X64-AVX2-NEXT:    vpxor {{.*}}(%rip), %ymm0, %ymm0
 ; X64-AVX2-NEXT:    vpxor {{.*}}(%rip), %ymm2, %ymm2
 ; X64-AVX2-NEXT:    vpor %ymm2, %ymm1, %ymm1
 ; X64-AVX2-NEXT:    vpor %ymm1, %ymm0, %ymm0
 ; X64-AVX2-NEXT:    vptest %ymm0, %ymm0
 ; X64-AVX2-NEXT:    sete %al
 ; X64-AVX2-NEXT:    vzeroupper
 ; X64-AVX2-NEXT:    retq
 ;
 ; X64-AVX512BW-LABEL: length96_eq_const:
 ; X64-AVX512BW:       # %bb.0:
 ; X64-AVX512BW-NEXT:    vmovdqu64 (%rdi), %zmm0
 ; X64-AVX512BW-NEXT:    vmovdqu 64(%rdi), %ymm1
 ; X64-AVX512BW-NEXT:    vpcmpneqb {{.*}}(%rip), %zmm0, %k0
 ; X64-AVX512BW-NEXT:    vpcmpneqb {{.*}}(%rip), %zmm1, %k1
 ; X64-AVX512BW-NEXT:    kortestq %k1, %k0
 ; X64-AVX512BW-NEXT:    sete %al
 ; X64-AVX512BW-NEXT:    vzeroupper
 ; X64-AVX512BW-NEXT:    retq
 ;
 ; X64-AVX512F-LABEL: length96_eq_const:
 ; X64-AVX512F:       # %bb.0:
 ; X64-AVX512F-NEXT:    vmovdqu64 (%rdi), %zmm0
 ; X64-AVX512F-NEXT:    vmovdqu 64(%rdi), %ymm1
 ; X64-AVX512F-NEXT:    vpcmpneqd {{.*}}(%rip), %zmm0, %k0
 ; X64-AVX512F-NEXT:    vpcmpneqd {{.*}}(%rip), %zmm1, %k1
 ; X64-AVX512F-NEXT:    kortestw %k1, %k0
 ; X64-AVX512F-NEXT:    sete %al
 ; X64-AVX512F-NEXT:    vzeroupper
 ; X64-AVX512F-NEXT:    retq
 ;
 ; X64-MIC-AVX2-LABEL: length96_eq_const:
 ; X64-MIC-AVX2:       # %bb.0:
 ; X64-MIC-AVX2-NEXT:    vmovdqu (%rdi), %ymm0
 ; X64-MIC-AVX2-NEXT:    vmovdqu 32(%rdi), %ymm1
 ; X64-MIC-AVX2-NEXT:    vmovdqu 64(%rdi), %ymm2
 ; X64-MIC-AVX2-NEXT:    vmovdqa {{.*#+}} ymm3 = [892613426,959985462,858927408,926299444,825243960,892613426,959985462,858927408]
 ; X64-MIC-AVX2-NEXT:    vpcmpneqd %zmm3, %zmm1, %k0
 ; X64-MIC-AVX2-NEXT:    vmovdqa {{.*#+}} ymm1 = [858927408,926299444,825243960,892613426,959985462,858927408,926299444,825243960]
 ; X64-MIC-AVX2-NEXT:    vpcmpneqd %zmm1, %zmm0, %k1
 ; X64-MIC-AVX2-NEXT:    korw %k0, %k1, %k0
 ; X64-MIC-AVX2-NEXT:    vmovdqa {{.*#+}} ymm0 = [926299444,825243960,892613426,959985462,858927408,926299444,825243960,892613426]
 ; X64-MIC-AVX2-NEXT:    vpcmpneqd %zmm0, %zmm2, %k1
 ; X64-MIC-AVX2-NEXT:    kortestw %k1, %k0
 ; X64-MIC-AVX2-NEXT:    sete %al
 ; X64-MIC-AVX2-NEXT:    vzeroupper
 ; X64-MIC-AVX2-NEXT:    retq
 ;
 ; X64-MIC-AVX512F-LABEL: length96_eq_const:
 ; X64-MIC-AVX512F:       # %bb.0:
 ; X64-MIC-AVX512F-NEXT:    vmovdqu64 (%rdi), %zmm0
 ; X64-MIC-AVX512F-NEXT:    vmovdqu 64(%rdi), %ymm1
 ; X64-MIC-AVX512F-NEXT:    vpcmpneqd {{.*}}(%rip), %zmm0, %k0
 ; X64-MIC-AVX512F-NEXT:    vpcmpneqd {{.*}}(%rip), %zmm1, %k1
 ; X64-MIC-AVX512F-NEXT:    kortestw %k1, %k0
 ; X64-MIC-AVX512F-NEXT:    sete %al
 ; X64-MIC-AVX512F-NEXT:    vzeroupper
 ; X64-MIC-AVX512F-NEXT:    retq
   %m = tail call i32 @memcmp(i8* %X, i8* getelementptr inbounds ([513 x i8], [513 x i8]* @.str, i32 0, i32 0), i64 96) nounwind
   %c = icmp eq i32 %m, 0
   ret i1 %c
 }

 define i32 @length127(i8* %X, i8* %Y) nounwind {
 ; X86-LABEL: length127:
 ; X86:       # %bb.0:
 ; X86-NEXT:    pushl $0
 ; X86-NEXT:    pushl $127
 ; X86-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NEXT:    calll memcmp
 ; X86-NEXT:    addl $16, %esp
 ; X86-NEXT:    retl
 ;
 ; X64-LABEL: length127:
 ; X64:       # %bb.0:
 ; X64-NEXT:    movl $127, %edx
 ; X64-NEXT:    jmp memcmp # TAILCALL
   %m = tail call i32 @memcmp(i8* %X, i8* %Y, i64 127) nounwind
   ret i32 %m
 }

 define i1 @length127_eq(i8* %x, i8* %y) nounwind {
 ; X86-LABEL: length127_eq:
 ; X86:       # %bb.0:
 ; X86-NEXT:    pushl $0
 ; X86-NEXT:    pushl $127
 ; X86-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NEXT:    calll memcmp
 ; X86-NEXT:    addl $16, %esp
 ; X86-NEXT:    testl %eax, %eax
 ; X86-NEXT:    setne %al
 ; X86-NEXT:    retl
 ;
 ; X64-SSE-LABEL: length127_eq:
 ; X64-SSE:       # %bb.0:
 ; X64-SSE-NEXT:    pushq %rax
 ; X64-SSE-NEXT:    movl $127, %edx
 ; X64-SSE-NEXT:    callq memcmp
 ; X64-SSE-NEXT:    testl %eax, %eax
 ; X64-SSE-NEXT:    setne %al
 ; X64-SSE-NEXT:    popq %rcx
 ; X64-SSE-NEXT:    retq
 ;
 ; X64-AVX1-LABEL: length127_eq:
 ; X64-AVX1:       # %bb.0:
 ; X64-AVX1-NEXT:    vmovups (%rdi), %ymm0
 ; X64-AVX1-NEXT:    vmovups 32(%rdi), %ymm1
 ; X64-AVX1-NEXT:    vmovups 64(%rdi), %ymm2
 ; X64-AVX1-NEXT:    vmovups 95(%rdi), %ymm3
 ; X64-AVX1-NEXT:    vxorps 95(%rsi), %ymm3, %ymm3
 ; X64-AVX1-NEXT:    vxorps 64(%rsi), %ymm2, %ymm2
 ; X64-AVX1-NEXT:    vorps %ymm3, %ymm2, %ymm2
 ; X64-AVX1-NEXT:    vxorps 32(%rsi), %ymm1, %ymm1
 ; X64-AVX1-NEXT:    vorps %ymm2, %ymm1, %ymm1
 ; X64-AVX1-NEXT:    vxorps (%rsi), %ymm0, %ymm0
 ; X64-AVX1-NEXT:    vorps %ymm1, %ymm0, %ymm0
 ; X64-AVX1-NEXT:    vptest %ymm0, %ymm0
 ; X64-AVX1-NEXT:    setne %al
 ; X64-AVX1-NEXT:    vzeroupper
 ; X64-AVX1-NEXT:    retq
 ;
 ; X64-AVX2-LABEL: length127_eq:
 ; X64-AVX2:       # %bb.0:
 ; X64-AVX2-NEXT:    vmovdqu (%rdi), %ymm0
 ; X64-AVX2-NEXT:    vmovdqu 32(%rdi), %ymm1
 ; X64-AVX2-NEXT:    vmovdqu 64(%rdi), %ymm2
 ; X64-AVX2-NEXT:    vmovdqu 95(%rdi), %ymm3
 ; X64-AVX2-NEXT:    vpxor 95(%rsi), %ymm3, %ymm3
 ; X64-AVX2-NEXT:    vpxor 64(%rsi), %ymm2, %ymm2
 ; X64-AVX2-NEXT:    vpor %ymm3, %ymm2, %ymm2
 ; X64-AVX2-NEXT:    vpxor 32(%rsi), %ymm1, %ymm1
 ; X64-AVX2-NEXT:    vpor %ymm2, %ymm1, %ymm1
 ; X64-AVX2-NEXT:    vpxor (%rsi), %ymm0, %ymm0
 ; X64-AVX2-NEXT:    vpor %ymm1, %ymm0, %ymm0
 ; X64-AVX2-NEXT:    vptest %ymm0, %ymm0
 ; X64-AVX2-NEXT:    setne %al
 ; X64-AVX2-NEXT:    vzeroupper
 ; X64-AVX2-NEXT:    retq
 ;
 ; X64-AVX512BW-LABEL: length127_eq:
 ; X64-AVX512BW:       # %bb.0:
 ; X64-AVX512BW-NEXT:    vmovdqu64 (%rdi), %zmm0
 ; X64-AVX512BW-NEXT:    vmovdqu64 63(%rdi), %zmm1
 ; X64-AVX512BW-NEXT:    vpcmpneqb 63(%rsi), %zmm1, %k0
 ; X64-AVX512BW-NEXT:    vpcmpneqb (%rsi), %zmm0, %k1
 ; X64-AVX512BW-NEXT:    kortestq %k0, %k1
 ; X64-AVX512BW-NEXT:    setne %al
 ; X64-AVX512BW-NEXT:    vzeroupper
 ; X64-AVX512BW-NEXT:    retq
 ;
 ; X64-AVX512F-LABEL: length127_eq:
 ; X64-AVX512F:       # %bb.0:
 ; X64-AVX512F-NEXT:    vmovdqu64 (%rdi), %zmm0
 ; X64-AVX512F-NEXT:    vmovdqu64 63(%rdi), %zmm1
 ; X64-AVX512F-NEXT:    vpcmpneqd 63(%rsi), %zmm1, %k0
 ; X64-AVX512F-NEXT:    vpcmpneqd (%rsi), %zmm0, %k1
 ; X64-AVX512F-NEXT:    kortestw %k0, %k1
 ; X64-AVX512F-NEXT:    setne %al
 ; X64-AVX512F-NEXT:    vzeroupper
 ; X64-AVX512F-NEXT:    retq
 ;
 ; X64-MIC-AVX2-LABEL: length127_eq:
 ; X64-MIC-AVX2:       # %bb.0:
 ; X64-MIC-AVX2-NEXT:    vmovdqu (%rdi), %ymm0
 ; X64-MIC-AVX2-NEXT:    vmovdqu 32(%rdi), %ymm1
 ; X64-MIC-AVX2-NEXT:    vmovdqu 64(%rdi), %ymm2
 ; X64-MIC-AVX2-NEXT:    vmovdqu 95(%rdi), %ymm3
 ; X64-MIC-AVX2-NEXT:    vmovdqu (%rsi), %ymm4
 ; X64-MIC-AVX2-NEXT:    vmovdqu 32(%rsi), %ymm5
 ; X64-MIC-AVX2-NEXT:    vmovdqu 64(%rsi), %ymm6
 ; X64-MIC-AVX2-NEXT:    vmovdqu 95(%rsi), %ymm7
 ; X64-MIC-AVX2-NEXT:    vpcmpneqd %zmm7, %zmm3, %k0
 ; X64-MIC-AVX2-NEXT:    vpcmpneqd %zmm6, %zmm2, %k1
 ; X64-MIC-AVX2-NEXT:    korw %k0, %k1, %k0
 ; X64-MIC-AVX2-NEXT:    vpcmpneqd %zmm5, %zmm1, %k1
 ; X64-MIC-AVX2-NEXT:    vpcmpneqd %zmm4, %zmm0, %k2
 ; X64-MIC-AVX2-NEXT:    korw %k1, %k2, %k1
 ; X64-MIC-AVX2-NEXT:    kortestw %k0, %k1
 ; X64-MIC-AVX2-NEXT:    setne %al
 ; X64-MIC-AVX2-NEXT:    vzeroupper
 ; X64-MIC-AVX2-NEXT:    retq
 ;
 ; X64-MIC-AVX512F-LABEL: length127_eq:
 ; X64-MIC-AVX512F:       # %bb.0:
 ; X64-MIC-AVX512F-NEXT:    vmovdqu64 (%rdi), %zmm0
 ; X64-MIC-AVX512F-NEXT:    vmovdqu64 63(%rdi), %zmm1
 ; X64-MIC-AVX512F-NEXT:    vpcmpneqd 63(%rsi), %zmm1, %k0
 ; X64-MIC-AVX512F-NEXT:    vpcmpneqd (%rsi), %zmm0, %k1
 ; X64-MIC-AVX512F-NEXT:    kortestw %k0, %k1
 ; X64-MIC-AVX512F-NEXT:    setne %al
 ; X64-MIC-AVX512F-NEXT:    vzeroupper
 ; X64-MIC-AVX512F-NEXT:    retq
   %call = tail call i32 @memcmp(i8* %x, i8* %y, i64 127) nounwind
   %cmp = icmp ne i32 %call, 0
   ret i1 %cmp
 }

 define i1 @length127_lt(i8* %x, i8* %y) nounwind {
 ; X86-LABEL: length127_lt:
 ; X86:       # %bb.0:
 ; X86-NEXT:    pushl $0
 ; X86-NEXT:    pushl $127
 ; X86-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NEXT:    calll memcmp
 ; X86-NEXT:    addl $16, %esp
 ; X86-NEXT:    shrl $31, %eax
 ; X86-NEXT:    # kill: def $al killed $al killed $eax
 ; X86-NEXT:    retl
 ;
 ; X64-LABEL: length127_lt:
 ; X64:       # %bb.0:
 ; X64-NEXT:    pushq %rax
 ; X64-NEXT:    movl $127, %edx
 ; X64-NEXT:    callq memcmp
 ; X64-NEXT:    shrl $31, %eax
 ; X64-NEXT:    # kill: def $al killed $al killed $eax
 ; X64-NEXT:    popq %rcx
 ; X64-NEXT:    retq
   %call = tail call i32 @memcmp(i8* %x, i8* %y, i64 127) nounwind
   %cmp = icmp slt i32 %call, 0
   ret i1 %cmp
 }

 define i1 @length127_gt(i8* %x, i8* %y) nounwind {
 ; X86-LABEL: length127_gt:
 ; X86:       # %bb.0:
 ; X86-NEXT:    pushl $0
 ; X86-NEXT:    pushl $127
 ; X86-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NEXT:    calll memcmp
 ; X86-NEXT:    addl $16, %esp
 ; X86-NEXT:    testl %eax, %eax
 ; X86-NEXT:    setg %al
 ; X86-NEXT:    retl
 ;
 ; X64-LABEL: length127_gt:
 ; X64:       # %bb.0:
 ; X64-NEXT:    pushq %rax
 ; X64-NEXT:    movl $127, %edx
 ; X64-NEXT:    callq memcmp
 ; X64-NEXT:    testl %eax, %eax
 ; X64-NEXT:    setg %al
 ; X64-NEXT:    popq %rcx
 ; X64-NEXT:    retq
   %call = tail call i32 @memcmp(i8* %x, i8* %y, i64 127) nounwind
   %cmp = icmp sgt i32 %call, 0
   ret i1 %cmp
 }

 define i1 @length127_eq_const(i8* %X) nounwind {
 ; X86-LABEL: length127_eq_const:
 ; X86:       # %bb.0:
 ; X86-NEXT:    pushl $0
 ; X86-NEXT:    pushl $127
 ; X86-NEXT:    pushl $.L.str
 ; X86-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NEXT:    calll memcmp
 ; X86-NEXT:    addl $16, %esp
 ; X86-NEXT:    testl %eax, %eax
 ; X86-NEXT:    sete %al
 ; X86-NEXT:    retl
 ;
 ; X64-SSE-LABEL: length127_eq_const:
 ; X64-SSE:       # %bb.0:
 ; X64-SSE-NEXT:    pushq %rax
 ; X64-SSE-NEXT:    movl $.L.str, %esi
 ; X64-SSE-NEXT:    movl $127, %edx
 ; X64-SSE-NEXT:    callq memcmp
 ; X64-SSE-NEXT:    testl %eax, %eax
 ; X64-SSE-NEXT:    sete %al
 ; X64-SSE-NEXT:    popq %rcx
 ; X64-SSE-NEXT:    retq
 ;
 ; X64-AVX1-LABEL: length127_eq_const:
 ; X64-AVX1:       # %bb.0:
 ; X64-AVX1-NEXT:    vmovups (%rdi), %ymm0
 ; X64-AVX1-NEXT:    vmovups 32(%rdi), %ymm1
 ; X64-AVX1-NEXT:    vmovups 64(%rdi), %ymm2
 ; X64-AVX1-NEXT:    vmovups 95(%rdi), %ymm3
 ; X64-AVX1-NEXT:    vxorps {{.*}}(%rip), %ymm3, %ymm3
 ; X64-AVX1-NEXT:    vxorps {{.*}}(%rip), %ymm2, %ymm2
 ; X64-AVX1-NEXT:    vorps %ymm3, %ymm2, %ymm2
 ; X64-AVX1-NEXT:    vxorps {{.*}}(%rip), %ymm1, %ymm1
 ; X64-AVX1-NEXT:    vorps %ymm2, %ymm1, %ymm1
 ; X64-AVX1-NEXT:    vxorps {{.*}}(%rip), %ymm0, %ymm0
 ; X64-AVX1-NEXT:    vorps %ymm1, %ymm0, %ymm0
 ; X64-AVX1-NEXT:    vptest %ymm0, %ymm0
 ; X64-AVX1-NEXT:    sete %al
 ; X64-AVX1-NEXT:    vzeroupper
 ; X64-AVX1-NEXT:    retq
 ;
 ; X64-AVX2-LABEL: length127_eq_const:
 ; X64-AVX2:       # %bb.0:
 ; X64-AVX2-NEXT:    vmovdqu (%rdi), %ymm0
 ; X64-AVX2-NEXT:    vmovdqu 32(%rdi), %ymm1
 ; X64-AVX2-NEXT:    vmovdqu 64(%rdi), %ymm2
 ; X64-AVX2-NEXT:    vmovdqu 95(%rdi), %ymm3
 ; X64-AVX2-NEXT:    vpxor {{.*}}(%rip), %ymm3, %ymm3
 ; X64-AVX2-NEXT:    vpxor {{.*}}(%rip), %ymm2, %ymm2
 ; X64-AVX2-NEXT:    vpor %ymm3, %ymm2, %ymm2
 ; X64-AVX2-NEXT:    vpxor {{.*}}(%rip), %ymm1, %ymm1
 ; X64-AVX2-NEXT:    vpor %ymm2, %ymm1, %ymm1
 ; X64-AVX2-NEXT:    vpxor {{.*}}(%rip), %ymm0, %ymm0
 ; X64-AVX2-NEXT:    vpor %ymm1, %ymm0, %ymm0
 ; X64-AVX2-NEXT:    vptest %ymm0, %ymm0
 ; X64-AVX2-NEXT:    sete %al
 ; X64-AVX2-NEXT:    vzeroupper
 ; X64-AVX2-NEXT:    retq
 ;
 ; X64-AVX512BW-LABEL: length127_eq_const:
 ; X64-AVX512BW:       # %bb.0:
 ; X64-AVX512BW-NEXT:    vmovdqu64 (%rdi), %zmm0
 ; X64-AVX512BW-NEXT:    vmovdqu64 63(%rdi), %zmm1
 ; X64-AVX512BW-NEXT:    vpcmpneqb .L.str+{{.*}}(%rip), %zmm1, %k0
 ; X64-AVX512BW-NEXT:    vpcmpneqb {{.*}}(%rip), %zmm0, %k1
 ; X64-AVX512BW-NEXT:    kortestq %k0, %k1
 ; X64-AVX512BW-NEXT:    sete %al
 ; X64-AVX512BW-NEXT:    vzeroupper
 ; X64-AVX512BW-NEXT:    retq
 ;
 ; X64-AVX512F-LABEL: length127_eq_const:
 ; X64-AVX512F:       # %bb.0:
 ; X64-AVX512F-NEXT:    vmovdqu64 (%rdi), %zmm0
 ; X64-AVX512F-NEXT:    vmovdqu64 63(%rdi), %zmm1
 ; X64-AVX512F-NEXT:    vpcmpneqd .L.str+{{.*}}(%rip), %zmm1, %k0
 ; X64-AVX512F-NEXT:    vpcmpneqd {{.*}}(%rip), %zmm0, %k1
 ; X64-AVX512F-NEXT:    kortestw %k0, %k1
 ; X64-AVX512F-NEXT:    sete %al
 ; X64-AVX512F-NEXT:    vzeroupper
 ; X64-AVX512F-NEXT:    retq
 ;
 ; X64-MIC-AVX2-LABEL: length127_eq_const:
 ; X64-MIC-AVX2:       # %bb.0:
 ; X64-MIC-AVX2-NEXT:    vmovdqu (%rdi), %ymm0
 ; X64-MIC-AVX2-NEXT:    vmovdqu 32(%rdi), %ymm1
 ; X64-MIC-AVX2-NEXT:    vmovdqu 64(%rdi), %ymm2
 ; X64-MIC-AVX2-NEXT:    vmovdqu 95(%rdi), %ymm3
 ; X64-MIC-AVX2-NEXT:    vmovdqa {{.*#+}} ymm4 = [943142453,842084409,909456435,809056311,875770417,943142453,842084409,909456435]
 ; X64-MIC-AVX2-NEXT:    vpcmpneqd %zmm4, %zmm3, %k0
 ; X64-MIC-AVX2-NEXT:    vmovdqa {{.*#+}} ymm3 = [926299444,825243960,892613426,959985462,858927408,926299444,825243960,892613426]
 ; X64-MIC-AVX2-NEXT:    vpcmpneqd %zmm3, %zmm2, %k1
 ; X64-MIC-AVX2-NEXT:    korw %k0, %k1, %k0
 ; X64-MIC-AVX2-NEXT:    vmovdqa {{.*#+}} ymm2 = [892613426,959985462,858927408,926299444,825243960,892613426,959985462,858927408]
 ; X64-MIC-AVX2-NEXT:    vpcmpneqd %zmm2, %zmm1, %k1
 ; X64-MIC-AVX2-NEXT:    vmovdqa {{.*#+}} ymm1 = [858927408,926299444,825243960,892613426,959985462,858927408,926299444,825243960]
 ; X64-MIC-AVX2-NEXT:    vpcmpneqd %zmm1, %zmm0, %k2
 ; X64-MIC-AVX2-NEXT:    korw %k1, %k2, %k1
 ; X64-MIC-AVX2-NEXT:    kortestw %k0, %k1
 ; X64-MIC-AVX2-NEXT:    sete %al
 ; X64-MIC-AVX2-NEXT:    vzeroupper
 ; X64-MIC-AVX2-NEXT:    retq
 ;
 ; X64-MIC-AVX512F-LABEL: length127_eq_const:
 ; X64-MIC-AVX512F:       # %bb.0:
 ; X64-MIC-AVX512F-NEXT:    vmovdqu64 (%rdi), %zmm0
 ; X64-MIC-AVX512F-NEXT:    vmovdqu64 63(%rdi), %zmm1
 ; X64-MIC-AVX512F-NEXT:    vpcmpneqd .L.str+{{.*}}(%rip), %zmm1, %k0
 ; X64-MIC-AVX512F-NEXT:    vpcmpneqd {{.*}}(%rip), %zmm0, %k1
 ; X64-MIC-AVX512F-NEXT:    kortestw %k0, %k1
 ; X64-MIC-AVX512F-NEXT:    sete %al
 ; X64-MIC-AVX512F-NEXT:    vzeroupper
 ; X64-MIC-AVX512F-NEXT:    retq
   %m = tail call i32 @memcmp(i8* %X, i8* getelementptr inbounds ([513 x i8], [513 x i8]* @.str, i32 0, i32 0), i64 127) nounwind
   %c = icmp eq i32 %m, 0
   ret i1 %c
 }

 define i32 @length128(i8* %X, i8* %Y) nounwind {
 ; X86-LABEL: length128:
 ; X86:       # %bb.0:
 ; X86-NEXT:    pushl $0
 ; X86-NEXT:    pushl $128
 ; X86-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NEXT:    calll memcmp
 ; X86-NEXT:    addl $16, %esp
 ; X86-NEXT:    retl
 ;
 ; X64-LABEL: length128:
 ; X64:       # %bb.0:
 ; X64-NEXT:    movl $128, %edx
 ; X64-NEXT:    jmp memcmp # TAILCALL
   %m = tail call i32 @memcmp(i8* %X, i8* %Y, i64 128) nounwind
   ret i32 %m
 }

 define i1 @length128_eq(i8* %x, i8* %y) nounwind {
 ; X86-LABEL: length128_eq:
 ; X86:       # %bb.0:
 ; X86-NEXT:    pushl $0
 ; X86-NEXT:    pushl $128
 ; X86-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NEXT:    calll memcmp
 ; X86-NEXT:    addl $16, %esp
 ; X86-NEXT:    testl %eax, %eax
 ; X86-NEXT:    setne %al
 ; X86-NEXT:    retl
 ;
 ; X64-SSE-LABEL: length128_eq:
 ; X64-SSE:       # %bb.0:
 ; X64-SSE-NEXT:    pushq %rax
 ; X64-SSE-NEXT:    movl $128, %edx
 ; X64-SSE-NEXT:    callq memcmp
 ; X64-SSE-NEXT:    testl %eax, %eax
 ; X64-SSE-NEXT:    setne %al
 ; X64-SSE-NEXT:    popq %rcx
 ; X64-SSE-NEXT:    retq
 ;
 ; X64-AVX1-LABEL: length128_eq:
 ; X64-AVX1:       # %bb.0:
 ; X64-AVX1-NEXT:    vmovups (%rdi), %ymm0
 ; X64-AVX1-NEXT:    vmovups 32(%rdi), %ymm1
 ; X64-AVX1-NEXT:    vmovups 64(%rdi), %ymm2
 ; X64-AVX1-NEXT:    vmovups 96(%rdi), %ymm3
 ; X64-AVX1-NEXT:    vxorps 96(%rsi), %ymm3, %ymm3
 ; X64-AVX1-NEXT:    vxorps 64(%rsi), %ymm2, %ymm2
 ; X64-AVX1-NEXT:    vorps %ymm3, %ymm2, %ymm2
 ; X64-AVX1-NEXT:    vxorps 32(%rsi), %ymm1, %ymm1
 ; X64-AVX1-NEXT:    vorps %ymm2, %ymm1, %ymm1
 ; X64-AVX1-NEXT:    vxorps (%rsi), %ymm0, %ymm0
 ; X64-AVX1-NEXT:    vorps %ymm1, %ymm0, %ymm0
 ; X64-AVX1-NEXT:    vptest %ymm0, %ymm0
 ; X64-AVX1-NEXT:    setne %al
 ; X64-AVX1-NEXT:    vzeroupper
 ; X64-AVX1-NEXT:    retq
 ;
 ; X64-AVX2-LABEL: length128_eq:
 ; X64-AVX2:       # %bb.0:
 ; X64-AVX2-NEXT:    vmovdqu (%rdi), %ymm0
 ; X64-AVX2-NEXT:    vmovdqu 32(%rdi), %ymm1
 ; X64-AVX2-NEXT:    vmovdqu 64(%rdi), %ymm2
 ; X64-AVX2-NEXT:    vmovdqu 96(%rdi), %ymm3
 ; X64-AVX2-NEXT:    vpxor 96(%rsi), %ymm3, %ymm3
 ; X64-AVX2-NEXT:    vpxor 64(%rsi), %ymm2, %ymm2
 ; X64-AVX2-NEXT:    vpor %ymm3, %ymm2, %ymm2
 ; X64-AVX2-NEXT:    vpxor 32(%rsi), %ymm1, %ymm1
 ; X64-AVX2-NEXT:    vpor %ymm2, %ymm1, %ymm1
 ; X64-AVX2-NEXT:    vpxor (%rsi), %ymm0, %ymm0
 ; X64-AVX2-NEXT:    vpor %ymm1, %ymm0, %ymm0
 ; X64-AVX2-NEXT:    vptest %ymm0, %ymm0
 ; X64-AVX2-NEXT:    setne %al
 ; X64-AVX2-NEXT:    vzeroupper
 ; X64-AVX2-NEXT:    retq
 ;
 ; X64-AVX512BW-LABEL: length128_eq:
 ; X64-AVX512BW:       # %bb.0:
 ; X64-AVX512BW-NEXT:    vmovdqu64 (%rdi), %zmm0
 ; X64-AVX512BW-NEXT:    vmovdqu64 64(%rdi), %zmm1
 ; X64-AVX512BW-NEXT:    vpcmpneqb 64(%rsi), %zmm1, %k0
 ; X64-AVX512BW-NEXT:    vpcmpneqb (%rsi), %zmm0, %k1
 ; X64-AVX512BW-NEXT:    kortestq %k0, %k1
 ; X64-AVX512BW-NEXT:    setne %al
 ; X64-AVX512BW-NEXT:    vzeroupper
 ; X64-AVX512BW-NEXT:    retq
 ;
 ; X64-AVX512F-LABEL: length128_eq:
 ; X64-AVX512F:       # %bb.0:
 ; X64-AVX512F-NEXT:    vmovdqu64 (%rdi), %zmm0
 ; X64-AVX512F-NEXT:    vmovdqu64 64(%rdi), %zmm1
 ; X64-AVX512F-NEXT:    vpcmpneqd 64(%rsi), %zmm1, %k0
 ; X64-AVX512F-NEXT:    vpcmpneqd (%rsi), %zmm0, %k1
 ; X64-AVX512F-NEXT:    kortestw %k0, %k1
 ; X64-AVX512F-NEXT:    setne %al
 ; X64-AVX512F-NEXT:    vzeroupper
 ; X64-AVX512F-NEXT:    retq
 ;
 ; X64-MIC-AVX2-LABEL: length128_eq:
 ; X64-MIC-AVX2:       # %bb.0:
 ; X64-MIC-AVX2-NEXT:    vmovdqu (%rdi), %ymm0
 ; X64-MIC-AVX2-NEXT:    vmovdqu 32(%rdi), %ymm1
 ; X64-MIC-AVX2-NEXT:    vmovdqu 64(%rdi), %ymm2
 ; X64-MIC-AVX2-NEXT:    vmovdqu 96(%rdi), %ymm3
 ; X64-MIC-AVX2-NEXT:    vmovdqu (%rsi), %ymm4
 ; X64-MIC-AVX2-NEXT:    vmovdqu 32(%rsi), %ymm5
 ; X64-MIC-AVX2-NEXT:    vmovdqu 64(%rsi), %ymm6
 ; X64-MIC-AVX2-NEXT:    vmovdqu 96(%rsi), %ymm7
 ; X64-MIC-AVX2-NEXT:    vpcmpneqd %zmm7, %zmm3, %k0
 ; X64-MIC-AVX2-NEXT:    vpcmpneqd %zmm6, %zmm2, %k1
 ; X64-MIC-AVX2-NEXT:    korw %k0, %k1, %k0
 ; X64-MIC-AVX2-NEXT:    vpcmpneqd %zmm5, %zmm1, %k1
 ; X64-MIC-AVX2-NEXT:    vpcmpneqd %zmm4, %zmm0, %k2
 ; X64-MIC-AVX2-NEXT:    korw %k1, %k2, %k1
 ; X64-MIC-AVX2-NEXT:    kortestw %k0, %k1
 ; X64-MIC-AVX2-NEXT:    setne %al
 ; X64-MIC-AVX2-NEXT:    vzeroupper
 ; X64-MIC-AVX2-NEXT:    retq
 ;
 ; X64-MIC-AVX512F-LABEL: length128_eq:
 ; X64-MIC-AVX512F:       # %bb.0:
 ; X64-MIC-AVX512F-NEXT:    vmovdqu64 (%rdi), %zmm0
 ; X64-MIC-AVX512F-NEXT:    vmovdqu64 64(%rdi), %zmm1
 ; X64-MIC-AVX512F-NEXT:    vpcmpneqd 64(%rsi), %zmm1, %k0
 ; X64-MIC-AVX512F-NEXT:    vpcmpneqd (%rsi), %zmm0, %k1
 ; X64-MIC-AVX512F-NEXT:    kortestw %k0, %k1
 ; X64-MIC-AVX512F-NEXT:    setne %al
 ; X64-MIC-AVX512F-NEXT:    vzeroupper
 ; X64-MIC-AVX512F-NEXT:    retq
   %call = tail call i32 @memcmp(i8* %x, i8* %y, i64 128) nounwind
   %cmp = icmp ne i32 %call, 0
   ret i1 %cmp
 }

 define i1 @length128_lt(i8* %x, i8* %y) nounwind {
 ; X86-LABEL: length128_lt:
 ; X86:       # %bb.0:
 ; X86-NEXT:    pushl $0
 ; X86-NEXT:    pushl $128
 ; X86-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NEXT:    calll memcmp
 ; X86-NEXT:    addl $16, %esp
 ; X86-NEXT:    shrl $31, %eax
 ; X86-NEXT:    # kill: def $al killed $al killed $eax
 ; X86-NEXT:    retl
 ;
 ; X64-LABEL: length128_lt:
 ; X64:       # %bb.0:
 ; X64-NEXT:    pushq %rax
 ; X64-NEXT:    movl $128, %edx
 ; X64-NEXT:    callq memcmp
 ; X64-NEXT:    shrl $31, %eax
 ; X64-NEXT:    # kill: def $al killed $al killed $eax
 ; X64-NEXT:    popq %rcx
 ; X64-NEXT:    retq
   %call = tail call i32 @memcmp(i8* %x, i8* %y, i64 128) nounwind
   %cmp = icmp slt i32 %call, 0
   ret i1 %cmp
 }

 define i1 @length128_gt(i8* %x, i8* %y) nounwind {
 ; X86-LABEL: length128_gt:
 ; X86:       # %bb.0:
 ; X86-NEXT:    pushl $0
 ; X86-NEXT:    pushl $128
 ; X86-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NEXT:    calll memcmp
 ; X86-NEXT:    addl $16, %esp
 ; X86-NEXT:    testl %eax, %eax
 ; X86-NEXT:    setg %al
 ; X86-NEXT:    retl
 ;
 ; X64-LABEL: length128_gt:
 ; X64:       # %bb.0:
 ; X64-NEXT:    pushq %rax
 ; X64-NEXT:    movl $128, %edx
 ; X64-NEXT:    callq memcmp
 ; X64-NEXT:    testl %eax, %eax
 ; X64-NEXT:    setg %al
 ; X64-NEXT:    popq %rcx
 ; X64-NEXT:    retq
   %call = tail call i32 @memcmp(i8* %x, i8* %y, i64 128) nounwind
   %cmp = icmp sgt i32 %call, 0
   ret i1 %cmp
 }

 define i1 @length128_eq_const(i8* %X) nounwind {
 ; X86-LABEL: length128_eq_const:
 ; X86:       # %bb.0:
 ; X86-NEXT:    pushl $0
 ; X86-NEXT:    pushl $128
 ; X86-NEXT:    pushl $.L.str
 ; X86-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NEXT:    calll memcmp
 ; X86-NEXT:    addl $16, %esp
 ; X86-NEXT:    testl %eax, %eax
 ; X86-NEXT:    sete %al
 ; X86-NEXT:    retl
 ;
 ; X64-SSE-LABEL: length128_eq_const:
 ; X64-SSE:       # %bb.0:
 ; X64-SSE-NEXT:    pushq %rax
 ; X64-SSE-NEXT:    movl $.L.str, %esi
 ; X64-SSE-NEXT:    movl $128, %edx
 ; X64-SSE-NEXT:    callq memcmp
 ; X64-SSE-NEXT:    testl %eax, %eax
 ; X64-SSE-NEXT:    sete %al
 ; X64-SSE-NEXT:    popq %rcx
 ; X64-SSE-NEXT:    retq
 ;
 ; X64-AVX1-LABEL: length128_eq_const:
 ; X64-AVX1:       # %bb.0:
 ; X64-AVX1-NEXT:    vmovups (%rdi), %ymm0
 ; X64-AVX1-NEXT:    vmovups 32(%rdi), %ymm1
 ; X64-AVX1-NEXT:    vmovups 64(%rdi), %ymm2
 ; X64-AVX1-NEXT:    vmovups 96(%rdi), %ymm3
 ; X64-AVX1-NEXT:    vxorps {{.*}}(%rip), %ymm3, %ymm3
 ; X64-AVX1-NEXT:    vxorps {{.*}}(%rip), %ymm2, %ymm2
 ; X64-AVX1-NEXT:    vorps %ymm3, %ymm2, %ymm2
 ; X64-AVX1-NEXT:    vxorps {{.*}}(%rip), %ymm1, %ymm1
 ; X64-AVX1-NEXT:    vorps %ymm2, %ymm1, %ymm1
 ; X64-AVX1-NEXT:    vxorps {{.*}}(%rip), %ymm0, %ymm0
 ; X64-AVX1-NEXT:    vorps %ymm1, %ymm0, %ymm0
 ; X64-AVX1-NEXT:    vptest %ymm0, %ymm0
 ; X64-AVX1-NEXT:    sete %al
 ; X64-AVX1-NEXT:    vzeroupper
 ; X64-AVX1-NEXT:    retq
 ;
 ; X64-AVX2-LABEL: length128_eq_const:
 ; X64-AVX2:       # %bb.0:
 ; X64-AVX2-NEXT:    vmovdqu (%rdi), %ymm0
 ; X64-AVX2-NEXT:    vmovdqu 32(%rdi), %ymm1
 ; X64-AVX2-NEXT:    vmovdqu 64(%rdi), %ymm2
 ; X64-AVX2-NEXT:    vmovdqu 96(%rdi), %ymm3
 ; X64-AVX2-NEXT:    vpxor {{.*}}(%rip), %ymm3, %ymm3
 ; X64-AVX2-NEXT:    vpxor {{.*}}(%rip), %ymm2, %ymm2
 ; X64-AVX2-NEXT:    vpor %ymm3, %ymm2, %ymm2
 ; X64-AVX2-NEXT:    vpxor {{.*}}(%rip), %ymm1, %ymm1
 ; X64-AVX2-NEXT:    vpor %ymm2, %ymm1, %ymm1
 ; X64-AVX2-NEXT:    vpxor {{.*}}(%rip), %ymm0, %ymm0
 ; X64-AVX2-NEXT:    vpor %ymm1, %ymm0, %ymm0
 ; X64-AVX2-NEXT:    vptest %ymm0, %ymm0
 ; X64-AVX2-NEXT:    sete %al
 ; X64-AVX2-NEXT:    vzeroupper
 ; X64-AVX2-NEXT:    retq
 ;
 ; X64-AVX512BW-LABEL: length128_eq_const:
 ; X64-AVX512BW:       # %bb.0:
 ; X64-AVX512BW-NEXT:    vmovdqu64 (%rdi), %zmm0
 ; X64-AVX512BW-NEXT:    vmovdqu64 64(%rdi), %zmm1
 ; X64-AVX512BW-NEXT:    vpcmpneqb .L.str+{{.*}}(%rip), %zmm1, %k0
 ; X64-AVX512BW-NEXT:    vpcmpneqb {{.*}}(%rip), %zmm0, %k1
 ; X64-AVX512BW-NEXT:    kortestq %k0, %k1
 ; X64-AVX512BW-NEXT:    sete %al
 ; X64-AVX512BW-NEXT:    vzeroupper
 ; X64-AVX512BW-NEXT:    retq
 ;
 ; X64-AVX512F-LABEL: length128_eq_const:
 ; X64-AVX512F:       # %bb.0:
 ; X64-AVX512F-NEXT:    vmovdqu64 (%rdi), %zmm0
 ; X64-AVX512F-NEXT:    vmovdqu64 64(%rdi), %zmm1
 ; X64-AVX512F-NEXT:    vpcmpneqd .L.str+{{.*}}(%rip), %zmm1, %k0
 ; X64-AVX512F-NEXT:    vpcmpneqd {{.*}}(%rip), %zmm0, %k1
 ; X64-AVX512F-NEXT:    kortestw %k0, %k1
 ; X64-AVX512F-NEXT:    sete %al
 ; X64-AVX512F-NEXT:    vzeroupper
 ; X64-AVX512F-NEXT:    retq
 ;
 ; X64-MIC-AVX2-LABEL: length128_eq_const:
 ; X64-MIC-AVX2:       # %bb.0:
 ; X64-MIC-AVX2-NEXT:    vmovdqu (%rdi), %ymm0
 ; X64-MIC-AVX2-NEXT:    vmovdqu 32(%rdi), %ymm1
 ; X64-MIC-AVX2-NEXT:    vmovdqu 64(%rdi), %ymm2
 ; X64-MIC-AVX2-NEXT:    vmovdqu 96(%rdi), %ymm3
 ; X64-MIC-AVX2-NEXT:    vmovdqa {{.*#+}} ymm4 = [959985462,858927408,926299444,825243960,892613426,959985462,858927408,926299444]
 ; X64-MIC-AVX2-NEXT:    vpcmpneqd %zmm4, %zmm3, %k0
 ; X64-MIC-AVX2-NEXT:    vmovdqa {{.*#+}} ymm3 = [926299444,825243960,892613426,959985462,858927408,926299444,825243960,892613426]
 ; X64-MIC-AVX2-NEXT:    vpcmpneqd %zmm3, %zmm2, %k1
 ; X64-MIC-AVX2-NEXT:    korw %k0, %k1, %k0
 ; X64-MIC-AVX2-NEXT:    vmovdqa {{.*#+}} ymm2 = [892613426,959985462,858927408,926299444,825243960,892613426,959985462,858927408]
 ; X64-MIC-AVX2-NEXT:    vpcmpneqd %zmm2, %zmm1, %k1
 ; X64-MIC-AVX2-NEXT:    vmovdqa {{.*#+}} ymm1 = [858927408,926299444,825243960,892613426,959985462,858927408,926299444,825243960]
 ; X64-MIC-AVX2-NEXT:    vpcmpneqd %zmm1, %zmm0, %k2
 ; X64-MIC-AVX2-NEXT:    korw %k1, %k2, %k1
 ; X64-MIC-AVX2-NEXT:    kortestw %k0, %k1
 ; X64-MIC-AVX2-NEXT:    sete %al
 ; X64-MIC-AVX2-NEXT:    vzeroupper
 ; X64-MIC-AVX2-NEXT:    retq
 ;
 ; X64-MIC-AVX512F-LABEL: length128_eq_const:
 ; X64-MIC-AVX512F:       # %bb.0:
 ; X64-MIC-AVX512F-NEXT:    vmovdqu64 (%rdi), %zmm0
 ; X64-MIC-AVX512F-NEXT:    vmovdqu64 64(%rdi), %zmm1
 ; X64-MIC-AVX512F-NEXT:    vpcmpneqd .L.str+{{.*}}(%rip), %zmm1, %k0
 ; X64-MIC-AVX512F-NEXT:    vpcmpneqd {{.*}}(%rip), %zmm0, %k1
 ; X64-MIC-AVX512F-NEXT:    kortestw %k0, %k1
 ; X64-MIC-AVX512F-NEXT:    sete %al
 ; X64-MIC-AVX512F-NEXT:    vzeroupper
 ; X64-MIC-AVX512F-NEXT:    retq
   %m = tail call i32 @memcmp(i8* %X, i8* getelementptr inbounds ([513 x i8], [513 x i8]* @.str, i32 0, i32 0), i64 128) nounwind
   %c = icmp eq i32 %m, 0
   ret i1 %c
 }

 define i32 @length192(i8* %X, i8* %Y) nounwind {
 ; X86-LABEL: length192:
 ; X86:       # %bb.0:
 ; X86-NEXT:    pushl $0
 ; X86-NEXT:    pushl $192
 ; X86-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NEXT:    calll memcmp
 ; X86-NEXT:    addl $16, %esp
 ; X86-NEXT:    retl
 ;
 ; X64-LABEL: length192:
 ; X64:       # %bb.0:
 ; X64-NEXT:    movl $192, %edx
 ; X64-NEXT:    jmp memcmp # TAILCALL
   %m = tail call i32 @memcmp(i8* %X, i8* %Y, i64 192) nounwind
   ret i32 %m
 }

 define i1 @length192_eq(i8* %x, i8* %y) nounwind {
 ; X86-LABEL: length192_eq:
 ; X86:       # %bb.0:
 ; X86-NEXT:    pushl $0
 ; X86-NEXT:    pushl $192
 ; X86-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NEXT:    calll memcmp
 ; X86-NEXT:    addl $16, %esp
 ; X86-NEXT:    testl %eax, %eax
 ; X86-NEXT:    setne %al
 ; X86-NEXT:    retl
 ;
 ; X64-SSE-LABEL: length192_eq:
 ; X64-SSE:       # %bb.0:
 ; X64-SSE-NEXT:    pushq %rax
 ; X64-SSE-NEXT:    movl $192, %edx
 ; X64-SSE-NEXT:    callq memcmp
 ; X64-SSE-NEXT:    testl %eax, %eax
 ; X64-SSE-NEXT:    setne %al
 ; X64-SSE-NEXT:    popq %rcx
 ; X64-SSE-NEXT:    retq
 ;
 ; X64-AVX1-LABEL: length192_eq:
 ; X64-AVX1:       # %bb.0:
 ; X64-AVX1-NEXT:    pushq %rax
 ; X64-AVX1-NEXT:    movl $192, %edx
 ; X64-AVX1-NEXT:    callq memcmp
 ; X64-AVX1-NEXT:    testl %eax, %eax
 ; X64-AVX1-NEXT:    setne %al
 ; X64-AVX1-NEXT:    popq %rcx
 ; X64-AVX1-NEXT:    retq
 ;
 ; X64-AVX2-LABEL: length192_eq:
 ; X64-AVX2:       # %bb.0:
 ; X64-AVX2-NEXT:    pushq %rax
 ; X64-AVX2-NEXT:    movl $192, %edx
 ; X64-AVX2-NEXT:    callq memcmp
 ; X64-AVX2-NEXT:    testl %eax, %eax
 ; X64-AVX2-NEXT:    setne %al
 ; X64-AVX2-NEXT:    popq %rcx
 ; X64-AVX2-NEXT:    retq
 ;
 ; X64-AVX512BW-LABEL: length192_eq:
 ; X64-AVX512BW:       # %bb.0:
 ; X64-AVX512BW-NEXT:    vmovdqu64 (%rdi), %zmm0
 ; X64-AVX512BW-NEXT:    vmovdqu64 64(%rdi), %zmm1
 ; X64-AVX512BW-NEXT:    vmovdqu64 128(%rdi), %zmm2
 ; X64-AVX512BW-NEXT:    vpcmpneqb 64(%rsi), %zmm1, %k0
 ; X64-AVX512BW-NEXT:    vpcmpneqb (%rsi), %zmm0, %k1
 ; X64-AVX512BW-NEXT:    korq %k0, %k1, %k0
 ; X64-AVX512BW-NEXT:    vpcmpneqb 128(%rsi), %zmm2, %k1
 ; X64-AVX512BW-NEXT:    kortestq %k1, %k0
 ; X64-AVX512BW-NEXT:    setne %al
 ; X64-AVX512BW-NEXT:    vzeroupper
 ; X64-AVX512BW-NEXT:    retq
 ;
 ; X64-AVX512F-LABEL: length192_eq:
 ; X64-AVX512F:       # %bb.0:
 ; X64-AVX512F-NEXT:    vmovdqu64 (%rdi), %zmm0
 ; X64-AVX512F-NEXT:    vmovdqu64 64(%rdi), %zmm1
 ; X64-AVX512F-NEXT:    vmovdqu64 128(%rdi), %zmm2
 ; X64-AVX512F-NEXT:    vpcmpneqd 64(%rsi), %zmm1, %k0
 ; X64-AVX512F-NEXT:    vpcmpneqd (%rsi), %zmm0, %k1
 ; X64-AVX512F-NEXT:    korw %k0, %k1, %k0
 ; X64-AVX512F-NEXT:    vpcmpneqd 128(%rsi), %zmm2, %k1
 ; X64-AVX512F-NEXT:    kortestw %k1, %k0
 ; X64-AVX512F-NEXT:    setne %al
 ; X64-AVX512F-NEXT:    vzeroupper
 ; X64-AVX512F-NEXT:    retq
 ;
 ; X64-MIC-AVX2-LABEL: length192_eq:
 ; X64-MIC-AVX2:       # %bb.0:
 ; X64-MIC-AVX2-NEXT:    pushq %rax
 ; X64-MIC-AVX2-NEXT:    movl $192, %edx
 ; X64-MIC-AVX2-NEXT:    callq memcmp
 ; X64-MIC-AVX2-NEXT:    testl %eax, %eax
 ; X64-MIC-AVX2-NEXT:    setne %al
 ; X64-MIC-AVX2-NEXT:    popq %rcx
 ; X64-MIC-AVX2-NEXT:    retq
 ;
 ; X64-MIC-AVX512F-LABEL: length192_eq:
 ; X64-MIC-AVX512F:       # %bb.0:
 ; X64-MIC-AVX512F-NEXT:    vmovdqu64 (%rdi), %zmm0
 ; X64-MIC-AVX512F-NEXT:    vmovdqu64 64(%rdi), %zmm1
 ; X64-MIC-AVX512F-NEXT:    vmovdqu64 128(%rdi), %zmm2
 ; X64-MIC-AVX512F-NEXT:    vpcmpneqd 64(%rsi), %zmm1, %k0
 ; X64-MIC-AVX512F-NEXT:    vpcmpneqd (%rsi), %zmm0, %k1
 ; X64-MIC-AVX512F-NEXT:    korw %k0, %k1, %k0
 ; X64-MIC-AVX512F-NEXT:    vpcmpneqd 128(%rsi), %zmm2, %k1
 ; X64-MIC-AVX512F-NEXT:    kortestw %k1, %k0
 ; X64-MIC-AVX512F-NEXT:    setne %al
 ; X64-MIC-AVX512F-NEXT:    vzeroupper
 ; X64-MIC-AVX512F-NEXT:    retq
   %call = tail call i32 @memcmp(i8* %x, i8* %y, i64 192) nounwind
   %cmp = icmp ne i32 %call, 0
   ret i1 %cmp
 }

 define i1 @length192_lt(i8* %x, i8* %y) nounwind {
 ; X86-LABEL: length192_lt:
 ; X86:       # %bb.0:
 ; X86-NEXT:    pushl $0
 ; X86-NEXT:    pushl $192
 ; X86-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NEXT:    calll memcmp
 ; X86-NEXT:    addl $16, %esp
 ; X86-NEXT:    shrl $31, %eax
 ; X86-NEXT:    # kill: def $al killed $al killed $eax
 ; X86-NEXT:    retl
 ;
 ; X64-LABEL: length192_lt:
 ; X64:       # %bb.0:
 ; X64-NEXT:    pushq %rax
 ; X64-NEXT:    movl $192, %edx
 ; X64-NEXT:    callq memcmp
 ; X64-NEXT:    shrl $31, %eax
 ; X64-NEXT:    # kill: def $al killed $al killed $eax
 ; X64-NEXT:    popq %rcx
 ; X64-NEXT:    retq
   %call = tail call i32 @memcmp(i8* %x, i8* %y, i64 192) nounwind
   %cmp = icmp slt i32 %call, 0
   ret i1 %cmp
 }

 define i1 @length192_gt(i8* %x, i8* %y) nounwind {
 ; X86-LABEL: length192_gt:
 ; X86:       # %bb.0:
 ; X86-NEXT:    pushl $0
 ; X86-NEXT:    pushl $192
 ; X86-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NEXT:    calll memcmp
 ; X86-NEXT:    addl $16, %esp
 ; X86-NEXT:    testl %eax, %eax
 ; X86-NEXT:    setg %al
 ; X86-NEXT:    retl
 ;
 ; X64-LABEL: length192_gt:
 ; X64:       # %bb.0:
 ; X64-NEXT:    pushq %rax
 ; X64-NEXT:    movl $192, %edx
 ; X64-NEXT:    callq memcmp
 ; X64-NEXT:    testl %eax, %eax
 ; X64-NEXT:    setg %al
 ; X64-NEXT:    popq %rcx
 ; X64-NEXT:    retq
   %call = tail call i32 @memcmp(i8* %x, i8* %y, i64 192) nounwind
   %cmp = icmp sgt i32 %call, 0
   ret i1 %cmp
 }

 define i1 @length192_eq_const(i8* %X) nounwind {
 ; X86-LABEL: length192_eq_const:
 ; X86:       # %bb.0:
 ; X86-NEXT:    pushl $0
 ; X86-NEXT:    pushl $192
 ; X86-NEXT:    pushl $.L.str
 ; X86-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NEXT:    calll memcmp
 ; X86-NEXT:    addl $16, %esp
 ; X86-NEXT:    testl %eax, %eax
 ; X86-NEXT:    sete %al
 ; X86-NEXT:    retl
 ;
 ; X64-SSE-LABEL: length192_eq_const:
 ; X64-SSE:       # %bb.0:
 ; X64-SSE-NEXT:    pushq %rax
 ; X64-SSE-NEXT:    movl $.L.str, %esi
 ; X64-SSE-NEXT:    movl $192, %edx
 ; X64-SSE-NEXT:    callq memcmp
 ; X64-SSE-NEXT:    testl %eax, %eax
 ; X64-SSE-NEXT:    sete %al
 ; X64-SSE-NEXT:    popq %rcx
 ; X64-SSE-NEXT:    retq
 ;
 ; X64-AVX1-LABEL: length192_eq_const:
 ; X64-AVX1:       # %bb.0:
 ; X64-AVX1-NEXT:    pushq %rax
 ; X64-AVX1-NEXT:    movl $.L.str, %esi
 ; X64-AVX1-NEXT:    movl $192, %edx
 ; X64-AVX1-NEXT:    callq memcmp
 ; X64-AVX1-NEXT:    testl %eax, %eax
 ; X64-AVX1-NEXT:    sete %al
 ; X64-AVX1-NEXT:    popq %rcx
 ; X64-AVX1-NEXT:    retq
 ;
 ; X64-AVX2-LABEL: length192_eq_const:
 ; X64-AVX2:       # %bb.0:
 ; X64-AVX2-NEXT:    pushq %rax
 ; X64-AVX2-NEXT:    movl $.L.str, %esi
 ; X64-AVX2-NEXT:    movl $192, %edx
 ; X64-AVX2-NEXT:    callq memcmp
 ; X64-AVX2-NEXT:    testl %eax, %eax
 ; X64-AVX2-NEXT:    sete %al
 ; X64-AVX2-NEXT:    popq %rcx
 ; X64-AVX2-NEXT:    retq
 ;
 ; X64-AVX512BW-LABEL: length192_eq_const:
 ; X64-AVX512BW:       # %bb.0:
 ; X64-AVX512BW-NEXT:    vmovdqu64 (%rdi), %zmm0
 ; X64-AVX512BW-NEXT:    vmovdqu64 64(%rdi), %zmm1
 ; X64-AVX512BW-NEXT:    vmovdqu64 128(%rdi), %zmm2
 ; X64-AVX512BW-NEXT:    vpcmpneqb .L.str+{{.*}}(%rip), %zmm1, %k0
 ; X64-AVX512BW-NEXT:    vpcmpneqb {{.*}}(%rip), %zmm0, %k1
 ; X64-AVX512BW-NEXT:    korq %k0, %k1, %k0
 ; X64-AVX512BW-NEXT:    vpcmpneqb .L.str+{{.*}}(%rip), %zmm2, %k1
 ; X64-AVX512BW-NEXT:    kortestq %k1, %k0
 ; X64-AVX512BW-NEXT:    sete %al
 ; X64-AVX512BW-NEXT:    vzeroupper
 ; X64-AVX512BW-NEXT:    retq
 ;
 ; X64-AVX512F-LABEL: length192_eq_const:
 ; X64-AVX512F:       # %bb.0:
 ; X64-AVX512F-NEXT:    vmovdqu64 (%rdi), %zmm0
 ; X64-AVX512F-NEXT:    vmovdqu64 64(%rdi), %zmm1
 ; X64-AVX512F-NEXT:    vmovdqu64 128(%rdi), %zmm2
 ; X64-AVX512F-NEXT:    vpcmpneqd .L.str+{{.*}}(%rip), %zmm1, %k0
 ; X64-AVX512F-NEXT:    vpcmpneqd {{.*}}(%rip), %zmm0, %k1
 ; X64-AVX512F-NEXT:    korw %k0, %k1, %k0
 ; X64-AVX512F-NEXT:    vpcmpneqd .L.str+{{.*}}(%rip), %zmm2, %k1
 ; X64-AVX512F-NEXT:    kortestw %k1, %k0
 ; X64-AVX512F-NEXT:    sete %al
 ; X64-AVX512F-NEXT:    vzeroupper
 ; X64-AVX512F-NEXT:    retq
 ;
 ; X64-MIC-AVX2-LABEL: length192_eq_const:
 ; X64-MIC-AVX2:       # %bb.0:
 ; X64-MIC-AVX2-NEXT:    pushq %rax
 ; X64-MIC-AVX2-NEXT:    movl $.L.str, %esi
 ; X64-MIC-AVX2-NEXT:    movl $192, %edx
 ; X64-MIC-AVX2-NEXT:    callq memcmp
 ; X64-MIC-AVX2-NEXT:    testl %eax, %eax
 ; X64-MIC-AVX2-NEXT:    sete %al
 ; X64-MIC-AVX2-NEXT:    popq %rcx
 ; X64-MIC-AVX2-NEXT:    retq
 ;
 ; X64-MIC-AVX512F-LABEL: length192_eq_const:
 ; X64-MIC-AVX512F:       # %bb.0:
 ; X64-MIC-AVX512F-NEXT:    vmovdqu64 (%rdi), %zmm0
 ; X64-MIC-AVX512F-NEXT:    vmovdqu64 64(%rdi), %zmm1
 ; X64-MIC-AVX512F-NEXT:    vmovdqu64 128(%rdi), %zmm2
 ; X64-MIC-AVX512F-NEXT:    vpcmpneqd .L.str+{{.*}}(%rip), %zmm1, %k0
 ; X64-MIC-AVX512F-NEXT:    vpcmpneqd {{.*}}(%rip), %zmm0, %k1
 ; X64-MIC-AVX512F-NEXT:    korw %k0, %k1, %k0
 ; X64-MIC-AVX512F-NEXT:    vpcmpneqd .L.str+{{.*}}(%rip), %zmm2, %k1
 ; X64-MIC-AVX512F-NEXT:    kortestw %k1, %k0
 ; X64-MIC-AVX512F-NEXT:    sete %al
 ; X64-MIC-AVX512F-NEXT:    vzeroupper
 ; X64-MIC-AVX512F-NEXT:    retq
   %m = tail call i32 @memcmp(i8* %X, i8* getelementptr inbounds ([513 x i8], [513 x i8]* @.str, i32 0, i32 0), i64 192) nounwind
   %c = icmp eq i32 %m, 0
   ret i1 %c
 }

 define i32 @length255(i8* %X, i8* %Y) nounwind {
 ; X86-LABEL: length255:
 ; X86:       # %bb.0:
 ; X86-NEXT:    pushl $0
 ; X86-NEXT:    pushl $255
 ; X86-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NEXT:    calll memcmp
 ; X86-NEXT:    addl $16, %esp
 ; X86-NEXT:    retl
 ;
 ; X64-LABEL: length255:
 ; X64:       # %bb.0:
 ; X64-NEXT:    movl $255, %edx
 ; X64-NEXT:    jmp memcmp # TAILCALL
   %m = tail call i32 @memcmp(i8* %X, i8* %Y, i64 255) nounwind
   ret i32 %m
 }

 define i1 @length255_eq(i8* %x, i8* %y) nounwind {
 ; X86-LABEL: length255_eq:
 ; X86:       # %bb.0:
 ; X86-NEXT:    pushl $0
 ; X86-NEXT:    pushl $255
 ; X86-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NEXT:    calll memcmp
 ; X86-NEXT:    addl $16, %esp
 ; X86-NEXT:    testl %eax, %eax
 ; X86-NEXT:    setne %al
 ; X86-NEXT:    retl
 ;
 ; X64-SSE-LABEL: length255_eq:
 ; X64-SSE:       # %bb.0:
 ; X64-SSE-NEXT:    pushq %rax
 ; X64-SSE-NEXT:    movl $255, %edx
 ; X64-SSE-NEXT:    callq memcmp
 ; X64-SSE-NEXT:    testl %eax, %eax
 ; X64-SSE-NEXT:    setne %al
 ; X64-SSE-NEXT:    popq %rcx
 ; X64-SSE-NEXT:    retq
 ;
 ; X64-AVX1-LABEL: length255_eq:
 ; X64-AVX1:       # %bb.0:
 ; X64-AVX1-NEXT:    pushq %rax
 ; X64-AVX1-NEXT:    movl $255, %edx
 ; X64-AVX1-NEXT:    callq memcmp
 ; X64-AVX1-NEXT:    testl %eax, %eax
 ; X64-AVX1-NEXT:    setne %al
 ; X64-AVX1-NEXT:    popq %rcx
 ; X64-AVX1-NEXT:    retq
 ;
 ; X64-AVX2-LABEL: length255_eq:
 ; X64-AVX2:       # %bb.0:
 ; X64-AVX2-NEXT:    pushq %rax
 ; X64-AVX2-NEXT:    movl $255, %edx
 ; X64-AVX2-NEXT:    callq memcmp
 ; X64-AVX2-NEXT:    testl %eax, %eax
 ; X64-AVX2-NEXT:    setne %al
 ; X64-AVX2-NEXT:    popq %rcx
 ; X64-AVX2-NEXT:    retq
 ;
 ; X64-AVX512BW-LABEL: length255_eq:
 ; X64-AVX512BW:       # %bb.0:
 ; X64-AVX512BW-NEXT:    vmovdqu64 (%rdi), %zmm0
 ; X64-AVX512BW-NEXT:    vmovdqu64 64(%rdi), %zmm1
 ; X64-AVX512BW-NEXT:    vmovdqu64 128(%rdi), %zmm2
 ; X64-AVX512BW-NEXT:    vmovdqu64 191(%rdi), %zmm3
 ; X64-AVX512BW-NEXT:    vpcmpneqb 191(%rsi), %zmm3, %k0
 ; X64-AVX512BW-NEXT:    vpcmpneqb 128(%rsi), %zmm2, %k1
 ; X64-AVX512BW-NEXT:    korq %k0, %k1, %k0
 ; X64-AVX512BW-NEXT:    vpcmpneqb 64(%rsi), %zmm1, %k1
 ; X64-AVX512BW-NEXT:    vpcmpneqb (%rsi), %zmm0, %k2
 ; X64-AVX512BW-NEXT:    korq %k1, %k2, %k1
 ; X64-AVX512BW-NEXT:    kortestq %k0, %k1
 ; X64-AVX512BW-NEXT:    setne %al
 ; X64-AVX512BW-NEXT:    vzeroupper
 ; X64-AVX512BW-NEXT:    retq
 ;
 ; X64-AVX512F-LABEL: length255_eq:
 ; X64-AVX512F:       # %bb.0:
 ; X64-AVX512F-NEXT:    vmovdqu64 (%rdi), %zmm0
 ; X64-AVX512F-NEXT:    vmovdqu64 64(%rdi), %zmm1
 ; X64-AVX512F-NEXT:    vmovdqu64 128(%rdi), %zmm2
 ; X64-AVX512F-NEXT:    vmovdqu64 191(%rdi), %zmm3
 ; X64-AVX512F-NEXT:    vpcmpneqd 191(%rsi), %zmm3, %k0
 ; X64-AVX512F-NEXT:    vpcmpneqd 128(%rsi), %zmm2, %k1
 ; X64-AVX512F-NEXT:    korw %k0, %k1, %k0
 ; X64-AVX512F-NEXT:    vpcmpneqd 64(%rsi), %zmm1, %k1
 ; X64-AVX512F-NEXT:    vpcmpneqd (%rsi), %zmm0, %k2
 ; X64-AVX512F-NEXT:    korw %k1, %k2, %k1
 ; X64-AVX512F-NEXT:    kortestw %k0, %k1
 ; X64-AVX512F-NEXT:    setne %al
 ; X64-AVX512F-NEXT:    vzeroupper
 ; X64-AVX512F-NEXT:    retq
 ;
 ; X64-MIC-AVX2-LABEL: length255_eq:
 ; X64-MIC-AVX2:       # %bb.0:
 ; X64-MIC-AVX2-NEXT:    pushq %rax
 ; X64-MIC-AVX2-NEXT:    movl $255, %edx
 ; X64-MIC-AVX2-NEXT:    callq memcmp
 ; X64-MIC-AVX2-NEXT:    testl %eax, %eax
 ; X64-MIC-AVX2-NEXT:    setne %al
 ; X64-MIC-AVX2-NEXT:    popq %rcx
 ; X64-MIC-AVX2-NEXT:    retq
 ;
 ; X64-MIC-AVX512F-LABEL: length255_eq:
 ; X64-MIC-AVX512F:       # %bb.0:
 ; X64-MIC-AVX512F-NEXT:    vmovdqu64 (%rdi), %zmm0
 ; X64-MIC-AVX512F-NEXT:    vmovdqu64 64(%rdi), %zmm1
 ; X64-MIC-AVX512F-NEXT:    vmovdqu64 128(%rdi), %zmm2
 ; X64-MIC-AVX512F-NEXT:    vmovdqu64 191(%rdi), %zmm3
 ; X64-MIC-AVX512F-NEXT:    vpcmpneqd 191(%rsi), %zmm3, %k0
 ; X64-MIC-AVX512F-NEXT:    vpcmpneqd 128(%rsi), %zmm2, %k1
 ; X64-MIC-AVX512F-NEXT:    korw %k0, %k1, %k0
 ; X64-MIC-AVX512F-NEXT:    vpcmpneqd 64(%rsi), %zmm1, %k1
 ; X64-MIC-AVX512F-NEXT:    vpcmpneqd (%rsi), %zmm0, %k2
 ; X64-MIC-AVX512F-NEXT:    korw %k1, %k2, %k1
 ; X64-MIC-AVX512F-NEXT:    kortestw %k0, %k1
 ; X64-MIC-AVX512F-NEXT:    setne %al
 ; X64-MIC-AVX512F-NEXT:    vzeroupper
 ; X64-MIC-AVX512F-NEXT:    retq
   %call = tail call i32 @memcmp(i8* %x, i8* %y, i64 255) nounwind
   %cmp = icmp ne i32 %call, 0
   ret i1 %cmp
 }

 define i1 @length255_lt(i8* %x, i8* %y) nounwind {
 ; X86-LABEL: length255_lt:
 ; X86:       # %bb.0:
 ; X86-NEXT:    pushl $0
 ; X86-NEXT:    pushl $255
 ; X86-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NEXT:    calll memcmp
 ; X86-NEXT:    addl $16, %esp
 ; X86-NEXT:    shrl $31, %eax
 ; X86-NEXT:    # kill: def $al killed $al killed $eax
 ; X86-NEXT:    retl
 ;
 ; X64-LABEL: length255_lt:
 ; X64:       # %bb.0:
 ; X64-NEXT:    pushq %rax
 ; X64-NEXT:    movl $255, %edx
 ; X64-NEXT:    callq memcmp
 ; X64-NEXT:    shrl $31, %eax
 ; X64-NEXT:    # kill: def $al killed $al killed $eax
 ; X64-NEXT:    popq %rcx
 ; X64-NEXT:    retq
   %call = tail call i32 @memcmp(i8* %x, i8* %y, i64 255) nounwind
   %cmp = icmp slt i32 %call, 0
   ret i1 %cmp
 }

 define i1 @length255_gt(i8* %x, i8* %y) nounwind {
 ; X86-LABEL: length255_gt:
 ; X86:       # %bb.0:
 ; X86-NEXT:    pushl $0
 ; X86-NEXT:    pushl $255
 ; X86-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NEXT:    calll memcmp
 ; X86-NEXT:    addl $16, %esp
 ; X86-NEXT:    testl %eax, %eax
 ; X86-NEXT:    setg %al
 ; X86-NEXT:    retl
 ;
 ; X64-LABEL: length255_gt:
 ; X64:       # %bb.0:
 ; X64-NEXT:    pushq %rax
 ; X64-NEXT:    movl $255, %edx
 ; X64-NEXT:    callq memcmp
 ; X64-NEXT:    testl %eax, %eax
 ; X64-NEXT:    setg %al
 ; X64-NEXT:    popq %rcx
 ; X64-NEXT:    retq
   %call = tail call i32 @memcmp(i8* %x, i8* %y, i64 255) nounwind
   %cmp = icmp sgt i32 %call, 0
   ret i1 %cmp
 }

 define i1 @length255_eq_const(i8* %X) nounwind {
 ; X86-LABEL: length255_eq_const:
 ; X86:       # %bb.0:
 ; X86-NEXT:    pushl $0
 ; X86-NEXT:    pushl $255
 ; X86-NEXT:    pushl $.L.str
 ; X86-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NEXT:    calll memcmp
 ; X86-NEXT:    addl $16, %esp
 ; X86-NEXT:    testl %eax, %eax
 ; X86-NEXT:    sete %al
 ; X86-NEXT:    retl
 ;
 ; X64-SSE-LABEL: length255_eq_const:
 ; X64-SSE:       # %bb.0:
 ; X64-SSE-NEXT:    pushq %rax
 ; X64-SSE-NEXT:    movl $.L.str, %esi
 ; X64-SSE-NEXT:    movl $255, %edx
 ; X64-SSE-NEXT:    callq memcmp
 ; X64-SSE-NEXT:    testl %eax, %eax
 ; X64-SSE-NEXT:    sete %al
 ; X64-SSE-NEXT:    popq %rcx
 ; X64-SSE-NEXT:    retq
 ;
 ; X64-AVX1-LABEL: length255_eq_const:
 ; X64-AVX1:       # %bb.0:
 ; X64-AVX1-NEXT:    pushq %rax
 ; X64-AVX1-NEXT:    movl $.L.str, %esi
 ; X64-AVX1-NEXT:    movl $255, %edx
 ; X64-AVX1-NEXT:    callq memcmp
 ; X64-AVX1-NEXT:    testl %eax, %eax
 ; X64-AVX1-NEXT:    sete %al
 ; X64-AVX1-NEXT:    popq %rcx
 ; X64-AVX1-NEXT:    retq
 ;
 ; X64-AVX2-LABEL: length255_eq_const:
 ; X64-AVX2:       # %bb.0:
 ; X64-AVX2-NEXT:    pushq %rax
 ; X64-AVX2-NEXT:    movl $.L.str, %esi
 ; X64-AVX2-NEXT:    movl $255, %edx
 ; X64-AVX2-NEXT:    callq memcmp
 ; X64-AVX2-NEXT:    testl %eax, %eax
 ; X64-AVX2-NEXT:    sete %al
 ; X64-AVX2-NEXT:    popq %rcx
 ; X64-AVX2-NEXT:    retq
 ;
 ; X64-AVX512BW-LABEL: length255_eq_const:
 ; X64-AVX512BW:       # %bb.0:
 ; X64-AVX512BW-NEXT:    vmovdqu64 (%rdi), %zmm0
 ; X64-AVX512BW-NEXT:    vmovdqu64 64(%rdi), %zmm1
 ; X64-AVX512BW-NEXT:    vmovdqu64 128(%rdi), %zmm2
 ; X64-AVX512BW-NEXT:    vmovdqu64 191(%rdi), %zmm3
 ; X64-AVX512BW-NEXT:    vpcmpneqb .L.str+{{.*}}(%rip), %zmm3, %k0
 ; X64-AVX512BW-NEXT:    vpcmpneqb .L.str+{{.*}}(%rip), %zmm2, %k1
 ; X64-AVX512BW-NEXT:    korq %k0, %k1, %k0
 ; X64-AVX512BW-NEXT:    vpcmpneqb .L.str+{{.*}}(%rip), %zmm1, %k1
 ; X64-AVX512BW-NEXT:    vpcmpneqb {{.*}}(%rip), %zmm0, %k2
 ; X64-AVX512BW-NEXT:    korq %k1, %k2, %k1
 ; X64-AVX512BW-NEXT:    kortestq %k0, %k1
 ; X64-AVX512BW-NEXT:    sete %al
 ; X64-AVX512BW-NEXT:    vzeroupper
 ; X64-AVX512BW-NEXT:    retq
 ;
 ; X64-AVX512F-LABEL: length255_eq_const:
 ; X64-AVX512F:       # %bb.0:
 ; X64-AVX512F-NEXT:    vmovdqu64 (%rdi), %zmm0
 ; X64-AVX512F-NEXT:    vmovdqu64 64(%rdi), %zmm1
 ; X64-AVX512F-NEXT:    vmovdqu64 128(%rdi), %zmm2
 ; X64-AVX512F-NEXT:    vmovdqu64 191(%rdi), %zmm3
 ; X64-AVX512F-NEXT:    vpcmpneqd .L.str+{{.*}}(%rip), %zmm3, %k0
 ; X64-AVX512F-NEXT:    vpcmpneqd .L.str+{{.*}}(%rip), %zmm2, %k1
 ; X64-AVX512F-NEXT:    korw %k0, %k1, %k0
 ; X64-AVX512F-NEXT:    vpcmpneqd .L.str+{{.*}}(%rip), %zmm1, %k1
 ; X64-AVX512F-NEXT:    vpcmpneqd {{.*}}(%rip), %zmm0, %k2
 ; X64-AVX512F-NEXT:    korw %k1, %k2, %k1
 ; X64-AVX512F-NEXT:    kortestw %k0, %k1
 ; X64-AVX512F-NEXT:    sete %al
 ; X64-AVX512F-NEXT:    vzeroupper
 ; X64-AVX512F-NEXT:    retq
 ;
 ; X64-MIC-AVX2-LABEL: length255_eq_const:
 ; X64-MIC-AVX2:       # %bb.0:
 ; X64-MIC-AVX2-NEXT:    pushq %rax
 ; X64-MIC-AVX2-NEXT:    movl $.L.str, %esi
 ; X64-MIC-AVX2-NEXT:    movl $255, %edx
 ; X64-MIC-AVX2-NEXT:    callq memcmp
 ; X64-MIC-AVX2-NEXT:    testl %eax, %eax
 ; X64-MIC-AVX2-NEXT:    sete %al
 ; X64-MIC-AVX2-NEXT:    popq %rcx
 ; X64-MIC-AVX2-NEXT:    retq
 ;
 ; X64-MIC-AVX512F-LABEL: length255_eq_const:
 ; X64-MIC-AVX512F:       # %bb.0:
 ; X64-MIC-AVX512F-NEXT:    vmovdqu64 (%rdi), %zmm0
 ; X64-MIC-AVX512F-NEXT:    vmovdqu64 64(%rdi), %zmm1
 ; X64-MIC-AVX512F-NEXT:    vmovdqu64 128(%rdi), %zmm2
 ; X64-MIC-AVX512F-NEXT:    vmovdqu64 191(%rdi), %zmm3
 ; X64-MIC-AVX512F-NEXT:    vpcmpneqd .L.str+{{.*}}(%rip), %zmm3, %k0
 ; X64-MIC-AVX512F-NEXT:    vpcmpneqd .L.str+{{.*}}(%rip), %zmm2, %k1
 ; X64-MIC-AVX512F-NEXT:    korw %k0, %k1, %k0
 ; X64-MIC-AVX512F-NEXT:    vpcmpneqd .L.str+{{.*}}(%rip), %zmm1, %k1
 ; X64-MIC-AVX512F-NEXT:    vpcmpneqd {{.*}}(%rip), %zmm0, %k2
 ; X64-MIC-AVX512F-NEXT:    korw %k1, %k2, %k1
 ; X64-MIC-AVX512F-NEXT:    kortestw %k0, %k1
 ; X64-MIC-AVX512F-NEXT:    sete %al
 ; X64-MIC-AVX512F-NEXT:    vzeroupper
 ; X64-MIC-AVX512F-NEXT:    retq
   %m = tail call i32 @memcmp(i8* %X, i8* getelementptr inbounds ([513 x i8], [513 x i8]* @.str, i32 0, i32 0), i64 255) nounwind
   %c = icmp eq i32 %m, 0
   ret i1 %c
 }

 define i32 @length256(i8* %X, i8* %Y) nounwind {
 ; X86-LABEL: length256:
 ; X86:       # %bb.0:
 ; X86-NEXT:    pushl $0
 ; X86-NEXT:    pushl $256 # imm = 0x100
 ; X86-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NEXT:    calll memcmp
 ; X86-NEXT:    addl $16, %esp
 ; X86-NEXT:    retl
 ;
 ; X64-LABEL: length256:
 ; X64:       # %bb.0:
 ; X64-NEXT:    movl $256, %edx # imm = 0x100
 ; X64-NEXT:    jmp memcmp # TAILCALL
   %m = tail call i32 @memcmp(i8* %X, i8* %Y, i64 256) nounwind
   ret i32 %m
 }

 define i1 @length256_eq(i8* %x, i8* %y) nounwind {
 ; X86-LABEL: length256_eq:
 ; X86:       # %bb.0:
 ; X86-NEXT:    pushl $0
 ; X86-NEXT:    pushl $256 # imm = 0x100
 ; X86-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NEXT:    calll memcmp
 ; X86-NEXT:    addl $16, %esp
 ; X86-NEXT:    testl %eax, %eax
 ; X86-NEXT:    setne %al
 ; X86-NEXT:    retl
 ;
 ; X64-SSE-LABEL: length256_eq:
 ; X64-SSE:       # %bb.0:
 ; X64-SSE-NEXT:    pushq %rax
 ; X64-SSE-NEXT:    movl $256, %edx # imm = 0x100
 ; X64-SSE-NEXT:    callq memcmp
 ; X64-SSE-NEXT:    testl %eax, %eax
 ; X64-SSE-NEXT:    setne %al
 ; X64-SSE-NEXT:    popq %rcx
 ; X64-SSE-NEXT:    retq
 ;
 ; X64-AVX1-LABEL: length256_eq:
 ; X64-AVX1:       # %bb.0:
 ; X64-AVX1-NEXT:    pushq %rax
 ; X64-AVX1-NEXT:    movl $256, %edx # imm = 0x100
 ; X64-AVX1-NEXT:    callq memcmp
 ; X64-AVX1-NEXT:    testl %eax, %eax
 ; X64-AVX1-NEXT:    setne %al
 ; X64-AVX1-NEXT:    popq %rcx
 ; X64-AVX1-NEXT:    retq
 ;
 ; X64-AVX2-LABEL: length256_eq:
 ; X64-AVX2:       # %bb.0:
 ; X64-AVX2-NEXT:    pushq %rax
 ; X64-AVX2-NEXT:    movl $256, %edx # imm = 0x100
 ; X64-AVX2-NEXT:    callq memcmp
 ; X64-AVX2-NEXT:    testl %eax, %eax
 ; X64-AVX2-NEXT:    setne %al
 ; X64-AVX2-NEXT:    popq %rcx
 ; X64-AVX2-NEXT:    retq
 ;
 ; X64-AVX512BW-LABEL: length256_eq:
 ; X64-AVX512BW:       # %bb.0:
 ; X64-AVX512BW-NEXT:    vmovdqu64 (%rdi), %zmm0
 ; X64-AVX512BW-NEXT:    vmovdqu64 64(%rdi), %zmm1
 ; X64-AVX512BW-NEXT:    vmovdqu64 128(%rdi), %zmm2
 ; X64-AVX512BW-NEXT:    vmovdqu64 192(%rdi), %zmm3
 ; X64-AVX512BW-NEXT:    vpcmpneqb 192(%rsi), %zmm3, %k0
 ; X64-AVX512BW-NEXT:    vpcmpneqb 128(%rsi), %zmm2, %k1
 ; X64-AVX512BW-NEXT:    korq %k0, %k1, %k0
 ; X64-AVX512BW-NEXT:    vpcmpneqb 64(%rsi), %zmm1, %k1
 ; X64-AVX512BW-NEXT:    vpcmpneqb (%rsi), %zmm0, %k2
 ; X64-AVX512BW-NEXT:    korq %k1, %k2, %k1
 ; X64-AVX512BW-NEXT:    kortestq %k0, %k1
 ; X64-AVX512BW-NEXT:    setne %al
 ; X64-AVX512BW-NEXT:    vzeroupper
 ; X64-AVX512BW-NEXT:    retq
 ;
 ; X64-AVX512F-LABEL: length256_eq:
 ; X64-AVX512F:       # %bb.0:
 ; X64-AVX512F-NEXT:    vmovdqu64 (%rdi), %zmm0
 ; X64-AVX512F-NEXT:    vmovdqu64 64(%rdi), %zmm1
 ; X64-AVX512F-NEXT:    vmovdqu64 128(%rdi), %zmm2
 ; X64-AVX512F-NEXT:    vmovdqu64 192(%rdi), %zmm3
 ; X64-AVX512F-NEXT:    vpcmpneqd 192(%rsi), %zmm3, %k0
 ; X64-AVX512F-NEXT:    vpcmpneqd 128(%rsi), %zmm2, %k1
 ; X64-AVX512F-NEXT:    korw %k0, %k1, %k0
 ; X64-AVX512F-NEXT:    vpcmpneqd 64(%rsi), %zmm1, %k1
 ; X64-AVX512F-NEXT:    vpcmpneqd (%rsi), %zmm0, %k2
 ; X64-AVX512F-NEXT:    korw %k1, %k2, %k1
 ; X64-AVX512F-NEXT:    kortestw %k0, %k1
 ; X64-AVX512F-NEXT:    setne %al
 ; X64-AVX512F-NEXT:    vzeroupper
 ; X64-AVX512F-NEXT:    retq
 ;
 ; X64-MIC-AVX2-LABEL: length256_eq:
 ; X64-MIC-AVX2:       # %bb.0:
 ; X64-MIC-AVX2-NEXT:    pushq %rax
 ; X64-MIC-AVX2-NEXT:    movl $256, %edx # imm = 0x100
 ; X64-MIC-AVX2-NEXT:    callq memcmp
 ; X64-MIC-AVX2-NEXT:    testl %eax, %eax
 ; X64-MIC-AVX2-NEXT:    setne %al
 ; X64-MIC-AVX2-NEXT:    popq %rcx
 ; X64-MIC-AVX2-NEXT:    retq
 ;
 ; X64-MIC-AVX512F-LABEL: length256_eq:
 ; X64-MIC-AVX512F:       # %bb.0:
 ; X64-MIC-AVX512F-NEXT:    vmovdqu64 (%rdi), %zmm0
 ; X64-MIC-AVX512F-NEXT:    vmovdqu64 64(%rdi), %zmm1
 ; X64-MIC-AVX512F-NEXT:    vmovdqu64 128(%rdi), %zmm2
 ; X64-MIC-AVX512F-NEXT:    vmovdqu64 192(%rdi), %zmm3
 ; X64-MIC-AVX512F-NEXT:    vpcmpneqd 192(%rsi), %zmm3, %k0
 ; X64-MIC-AVX512F-NEXT:    vpcmpneqd 128(%rsi), %zmm2, %k1
 ; X64-MIC-AVX512F-NEXT:    korw %k0, %k1, %k0
 ; X64-MIC-AVX512F-NEXT:    vpcmpneqd 64(%rsi), %zmm1, %k1
 ; X64-MIC-AVX512F-NEXT:    vpcmpneqd (%rsi), %zmm0, %k2
 ; X64-MIC-AVX512F-NEXT:    korw %k1, %k2, %k1
 ; X64-MIC-AVX512F-NEXT:    kortestw %k0, %k1
 ; X64-MIC-AVX512F-NEXT:    setne %al
 ; X64-MIC-AVX512F-NEXT:    vzeroupper
 ; X64-MIC-AVX512F-NEXT:    retq
   %call = tail call i32 @memcmp(i8* %x, i8* %y, i64 256) nounwind
   %cmp = icmp ne i32 %call, 0
   ret i1 %cmp
 }

 define i1 @length256_lt(i8* %x, i8* %y) nounwind {
 ; X86-LABEL: length256_lt:
 ; X86:       # %bb.0:
 ; X86-NEXT:    pushl $0
 ; X86-NEXT:    pushl $256 # imm = 0x100
 ; X86-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NEXT:    calll memcmp
 ; X86-NEXT:    addl $16, %esp
 ; X86-NEXT:    shrl $31, %eax
 ; X86-NEXT:    # kill: def $al killed $al killed $eax
 ; X86-NEXT:    retl
 ;
 ; X64-LABEL: length256_lt:
 ; X64:       # %bb.0:
 ; X64-NEXT:    pushq %rax
 ; X64-NEXT:    movl $256, %edx # imm = 0x100
 ; X64-NEXT:    callq memcmp
 ; X64-NEXT:    shrl $31, %eax
 ; X64-NEXT:    # kill: def $al killed $al killed $eax
 ; X64-NEXT:    popq %rcx
 ; X64-NEXT:    retq
   %call = tail call i32 @memcmp(i8* %x, i8* %y, i64 256) nounwind
   %cmp = icmp slt i32 %call, 0
   ret i1 %cmp
 }

 define i1 @length256_gt(i8* %x, i8* %y) nounwind {
 ; X86-LABEL: length256_gt:
 ; X86:       # %bb.0:
 ; X86-NEXT:    pushl $0
 ; X86-NEXT:    pushl $256 # imm = 0x100
 ; X86-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NEXT:    calll memcmp
 ; X86-NEXT:    addl $16, %esp
 ; X86-NEXT:    testl %eax, %eax
 ; X86-NEXT:    setg %al
 ; X86-NEXT:    retl
 ;
 ; X64-LABEL: length256_gt:
 ; X64:       # %bb.0:
 ; X64-NEXT:    pushq %rax
 ; X64-NEXT:    movl $256, %edx # imm = 0x100
 ; X64-NEXT:    callq memcmp
 ; X64-NEXT:    testl %eax, %eax
 ; X64-NEXT:    setg %al
 ; X64-NEXT:    popq %rcx
 ; X64-NEXT:    retq
   %call = tail call i32 @memcmp(i8* %x, i8* %y, i64 256) nounwind
   %cmp = icmp sgt i32 %call, 0
   ret i1 %cmp
 }

 define i1 @length256_eq_const(i8* %X) nounwind {
 ; X86-LABEL: length256_eq_const:
 ; X86:       # %bb.0:
 ; X86-NEXT:    pushl $0
 ; X86-NEXT:    pushl $256 # imm = 0x100
 ; X86-NEXT:    pushl $.L.str
 ; X86-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NEXT:    calll memcmp
 ; X86-NEXT:    addl $16, %esp
 ; X86-NEXT:    testl %eax, %eax
 ; X86-NEXT:    sete %al
 ; X86-NEXT:    retl
 ;
 ; X64-SSE-LABEL: length256_eq_const:
 ; X64-SSE:       # %bb.0:
 ; X64-SSE-NEXT:    pushq %rax
 ; X64-SSE-NEXT:    movl $.L.str, %esi
 ; X64-SSE-NEXT:    movl $256, %edx # imm = 0x100
 ; X64-SSE-NEXT:    callq memcmp
 ; X64-SSE-NEXT:    testl %eax, %eax
 ; X64-SSE-NEXT:    sete %al
 ; X64-SSE-NEXT:    popq %rcx
 ; X64-SSE-NEXT:    retq
 ;
 ; X64-AVX1-LABEL: length256_eq_const:
 ; X64-AVX1:       # %bb.0:
 ; X64-AVX1-NEXT:    pushq %rax
 ; X64-AVX1-NEXT:    movl $.L.str, %esi
 ; X64-AVX1-NEXT:    movl $256, %edx # imm = 0x100
 ; X64-AVX1-NEXT:    callq memcmp
 ; X64-AVX1-NEXT:    testl %eax, %eax
 ; X64-AVX1-NEXT:    sete %al
 ; X64-AVX1-NEXT:    popq %rcx
 ; X64-AVX1-NEXT:    retq
 ;
 ; X64-AVX2-LABEL: length256_eq_const:
 ; X64-AVX2:       # %bb.0:
 ; X64-AVX2-NEXT:    pushq %rax
 ; X64-AVX2-NEXT:    movl $.L.str, %esi
 ; X64-AVX2-NEXT:    movl $256, %edx # imm = 0x100
 ; X64-AVX2-NEXT:    callq memcmp
 ; X64-AVX2-NEXT:    testl %eax, %eax
 ; X64-AVX2-NEXT:    sete %al
 ; X64-AVX2-NEXT:    popq %rcx
 ; X64-AVX2-NEXT:    retq
 ;
 ; X64-AVX512BW-LABEL: length256_eq_const:
 ; X64-AVX512BW:       # %bb.0:
 ; X64-AVX512BW-NEXT:    vmovdqu64 (%rdi), %zmm0
 ; X64-AVX512BW-NEXT:    vmovdqu64 64(%rdi), %zmm1
 ; X64-AVX512BW-NEXT:    vmovdqu64 128(%rdi), %zmm2
 ; X64-AVX512BW-NEXT:    vmovdqu64 192(%rdi), %zmm3
 ; X64-AVX512BW-NEXT:    vpcmpneqb .L.str+{{.*}}(%rip), %zmm3, %k0
 ; X64-AVX512BW-NEXT:    vpcmpneqb .L.str+{{.*}}(%rip), %zmm2, %k1
 ; X64-AVX512BW-NEXT:    korq %k0, %k1, %k0
 ; X64-AVX512BW-NEXT:    vpcmpneqb .L.str+{{.*}}(%rip), %zmm1, %k1
 ; X64-AVX512BW-NEXT:    vpcmpneqb {{.*}}(%rip), %zmm0, %k2
 ; X64-AVX512BW-NEXT:    korq %k1, %k2, %k1
 ; X64-AVX512BW-NEXT:    kortestq %k0, %k1
 ; X64-AVX512BW-NEXT:    sete %al
 ; X64-AVX512BW-NEXT:    vzeroupper
 ; X64-AVX512BW-NEXT:    retq
 ;
 ; X64-AVX512F-LABEL: length256_eq_const:
 ; X64-AVX512F:       # %bb.0:
 ; X64-AVX512F-NEXT:    vmovdqu64 (%rdi), %zmm0
 ; X64-AVX512F-NEXT:    vmovdqu64 64(%rdi), %zmm1
 ; X64-AVX512F-NEXT:    vmovdqu64 128(%rdi), %zmm2
 ; X64-AVX512F-NEXT:    vmovdqu64 192(%rdi), %zmm3
 ; X64-AVX512F-NEXT:    vpcmpneqd .L.str+{{.*}}(%rip), %zmm3, %k0
 ; X64-AVX512F-NEXT:    vpcmpneqd .L.str+{{.*}}(%rip), %zmm2, %k1
 ; X64-AVX512F-NEXT:    korw %k0, %k1, %k0
 ; X64-AVX512F-NEXT:    vpcmpneqd .L.str+{{.*}}(%rip), %zmm1, %k1
 ; X64-AVX512F-NEXT:    vpcmpneqd {{.*}}(%rip), %zmm0, %k2
 ; X64-AVX512F-NEXT:    korw %k1, %k2, %k1
 ; X64-AVX512F-NEXT:    kortestw %k0, %k1
 ; X64-AVX512F-NEXT:    sete %al
 ; X64-AVX512F-NEXT:    vzeroupper
 ; X64-AVX512F-NEXT:    retq
 ;
 ; X64-MIC-AVX2-LABEL: length256_eq_const:
 ; X64-MIC-AVX2:       # %bb.0:
 ; X64-MIC-AVX2-NEXT:    pushq %rax
 ; X64-MIC-AVX2-NEXT:    movl $.L.str, %esi
 ; X64-MIC-AVX2-NEXT:    movl $256, %edx # imm = 0x100
 ; X64-MIC-AVX2-NEXT:    callq memcmp
 ; X64-MIC-AVX2-NEXT:    testl %eax, %eax
 ; X64-MIC-AVX2-NEXT:    sete %al
 ; X64-MIC-AVX2-NEXT:    popq %rcx
 ; X64-MIC-AVX2-NEXT:    retq
 ;
 ; X64-MIC-AVX512F-LABEL: length256_eq_const:
 ; X64-MIC-AVX512F:       # %bb.0:
 ; X64-MIC-AVX512F-NEXT:    vmovdqu64 (%rdi), %zmm0
 ; X64-MIC-AVX512F-NEXT:    vmovdqu64 64(%rdi), %zmm1
 ; X64-MIC-AVX512F-NEXT:    vmovdqu64 128(%rdi), %zmm2
 ; X64-MIC-AVX512F-NEXT:    vmovdqu64 192(%rdi), %zmm3
 ; X64-MIC-AVX512F-NEXT:    vpcmpneqd .L.str+{{.*}}(%rip), %zmm3, %k0
 ; X64-MIC-AVX512F-NEXT:    vpcmpneqd .L.str+{{.*}}(%rip), %zmm2, %k1
 ; X64-MIC-AVX512F-NEXT:    korw %k0, %k1, %k0
 ; X64-MIC-AVX512F-NEXT:    vpcmpneqd .L.str+{{.*}}(%rip), %zmm1, %k1
 ; X64-MIC-AVX512F-NEXT:    vpcmpneqd {{.*}}(%rip), %zmm0, %k2
 ; X64-MIC-AVX512F-NEXT:    korw %k1, %k2, %k1
 ; X64-MIC-AVX512F-NEXT:    kortestw %k0, %k1
 ; X64-MIC-AVX512F-NEXT:    sete %al
 ; X64-MIC-AVX512F-NEXT:    vzeroupper
 ; X64-MIC-AVX512F-NEXT:    retq
   %m = tail call i32 @memcmp(i8* %X, i8* getelementptr inbounds ([513 x i8], [513 x i8]* @.str, i32 0, i32 0), i64 256) nounwind
   %c = icmp eq i32 %m, 0
   ret i1 %c
 }

 define i32 @length384(i8* %X, i8* %Y) nounwind {
 ; X86-LABEL: length384:
 ; X86:       # %bb.0:
 ; X86-NEXT:    pushl $0
 ; X86-NEXT:    pushl $384 # imm = 0x180
 ; X86-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NEXT:    calll memcmp
 ; X86-NEXT:    addl $16, %esp
 ; X86-NEXT:    retl
 ;
 ; X64-LABEL: length384:
 ; X64:       # %bb.0:
 ; X64-NEXT:    movl $384, %edx # imm = 0x180
 ; X64-NEXT:    jmp memcmp # TAILCALL
   %m = tail call i32 @memcmp(i8* %X, i8* %Y, i64 384) nounwind
   ret i32 %m
 }

 define i1 @length384_eq(i8* %x, i8* %y) nounwind {
 ; X86-LABEL: length384_eq:
 ; X86:       # %bb.0:
 ; X86-NEXT:    pushl $0
 ; X86-NEXT:    pushl $384 # imm = 0x180
 ; X86-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NEXT:    calll memcmp
 ; X86-NEXT:    addl $16, %esp
 ; X86-NEXT:    testl %eax, %eax
 ; X86-NEXT:    setne %al
 ; X86-NEXT:    retl
 ;
 ; X64-LABEL: length384_eq:
 ; X64:       # %bb.0:
 ; X64-NEXT:    pushq %rax
 ; X64-NEXT:    movl $384, %edx # imm = 0x180
 ; X64-NEXT:    callq memcmp
 ; X64-NEXT:    testl %eax, %eax
 ; X64-NEXT:    setne %al
 ; X64-NEXT:    popq %rcx
 ; X64-NEXT:    retq
   %call = tail call i32 @memcmp(i8* %x, i8* %y, i64 384) nounwind
   %cmp = icmp ne i32 %call, 0
   ret i1 %cmp
 }

 define i1 @length384_lt(i8* %x, i8* %y) nounwind {
 ; X86-LABEL: length384_lt:
 ; X86:       # %bb.0:
 ; X86-NEXT:    pushl $0
 ; X86-NEXT:    pushl $384 # imm = 0x180
 ; X86-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NEXT:    calll memcmp
 ; X86-NEXT:    addl $16, %esp
 ; X86-NEXT:    shrl $31, %eax
 ; X86-NEXT:    # kill: def $al killed $al killed $eax
 ; X86-NEXT:    retl
 ;
 ; X64-LABEL: length384_lt:
 ; X64:       # %bb.0:
 ; X64-NEXT:    pushq %rax
 ; X64-NEXT:    movl $384, %edx # imm = 0x180
 ; X64-NEXT:    callq memcmp
 ; X64-NEXT:    shrl $31, %eax
 ; X64-NEXT:    # kill: def $al killed $al killed $eax
 ; X64-NEXT:    popq %rcx
 ; X64-NEXT:    retq
   %call = tail call i32 @memcmp(i8* %x, i8* %y, i64 384) nounwind
   %cmp = icmp slt i32 %call, 0
   ret i1 %cmp
 }

 define i1 @length384_gt(i8* %x, i8* %y) nounwind {
 ; X86-LABEL: length384_gt:
 ; X86:       # %bb.0:
 ; X86-NEXT:    pushl $0
 ; X86-NEXT:    pushl $384 # imm = 0x180
 ; X86-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NEXT:    calll memcmp
 ; X86-NEXT:    addl $16, %esp
 ; X86-NEXT:    testl %eax, %eax
 ; X86-NEXT:    setg %al
 ; X86-NEXT:    retl
 ;
 ; X64-LABEL: length384_gt:
 ; X64:       # %bb.0:
 ; X64-NEXT:    pushq %rax
 ; X64-NEXT:    movl $384, %edx # imm = 0x180
 ; X64-NEXT:    callq memcmp
 ; X64-NEXT:    testl %eax, %eax
 ; X64-NEXT:    setg %al
 ; X64-NEXT:    popq %rcx
 ; X64-NEXT:    retq
   %call = tail call i32 @memcmp(i8* %x, i8* %y, i64 384) nounwind
   %cmp = icmp sgt i32 %call, 0
   ret i1 %cmp
 }

 define i1 @length384_eq_const(i8* %X) nounwind {
 ; X86-LABEL: length384_eq_const:
 ; X86:       # %bb.0:
 ; X86-NEXT:    pushl $0
 ; X86-NEXT:    pushl $384 # imm = 0x180
 ; X86-NEXT:    pushl $.L.str
 ; X86-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NEXT:    calll memcmp
 ; X86-NEXT:    addl $16, %esp
 ; X86-NEXT:    testl %eax, %eax
 ; X86-NEXT:    sete %al
 ; X86-NEXT:    retl
 ;
 ; X64-LABEL: length384_eq_const:
 ; X64:       # %bb.0:
 ; X64-NEXT:    pushq %rax
 ; X64-NEXT:    movl $.L.str, %esi
 ; X64-NEXT:    movl $384, %edx # imm = 0x180
 ; X64-NEXT:    callq memcmp
 ; X64-NEXT:    testl %eax, %eax
 ; X64-NEXT:    sete %al
 ; X64-NEXT:    popq %rcx
 ; X64-NEXT:    retq
   %m = tail call i32 @memcmp(i8* %X, i8* getelementptr inbounds ([513 x i8], [513 x i8]* @.str, i32 0, i32 0), i64 384) nounwind
   %c = icmp eq i32 %m, 0
   ret i1 %c
 }

 define i32 @length511(i8* %X, i8* %Y) nounwind {
 ; X86-LABEL: length511:
 ; X86:       # %bb.0:
 ; X86-NEXT:    pushl $0
 ; X86-NEXT:    pushl $511 # imm = 0x1FF
 ; X86-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NEXT:    calll memcmp
 ; X86-NEXT:    addl $16, %esp
 ; X86-NEXT:    retl
 ;
 ; X64-LABEL: length511:
 ; X64:       # %bb.0:
 ; X64-NEXT:    movl $511, %edx # imm = 0x1FF
 ; X64-NEXT:    jmp memcmp # TAILCALL
   %m = tail call i32 @memcmp(i8* %X, i8* %Y, i64 511) nounwind
   ret i32 %m
 }

 define i1 @length511_eq(i8* %x, i8* %y) nounwind {
 ; X86-LABEL: length511_eq:
 ; X86:       # %bb.0:
 ; X86-NEXT:    pushl $0
 ; X86-NEXT:    pushl $511 # imm = 0x1FF
 ; X86-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NEXT:    calll memcmp
 ; X86-NEXT:    addl $16, %esp
 ; X86-NEXT:    testl %eax, %eax
 ; X86-NEXT:    setne %al
 ; X86-NEXT:    retl
 ;
 ; X64-LABEL: length511_eq:
 ; X64:       # %bb.0:
 ; X64-NEXT:    pushq %rax
 ; X64-NEXT:    movl $511, %edx # imm = 0x1FF
 ; X64-NEXT:    callq memcmp
 ; X64-NEXT:    testl %eax, %eax
 ; X64-NEXT:    setne %al
 ; X64-NEXT:    popq %rcx
 ; X64-NEXT:    retq
   %call = tail call i32 @memcmp(i8* %x, i8* %y, i64 511) nounwind
   %cmp = icmp ne i32 %call, 0
   ret i1 %cmp
 }

 define i1 @length511_lt(i8* %x, i8* %y) nounwind {
 ; X86-LABEL: length511_lt:
 ; X86:       # %bb.0:
 ; X86-NEXT:    pushl $0
 ; X86-NEXT:    pushl $511 # imm = 0x1FF
 ; X86-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NEXT:    calll memcmp
 ; X86-NEXT:    addl $16, %esp
 ; X86-NEXT:    shrl $31, %eax
 ; X86-NEXT:    # kill: def $al killed $al killed $eax
 ; X86-NEXT:    retl
 ;
 ; X64-LABEL: length511_lt:
 ; X64:       # %bb.0:
 ; X64-NEXT:    pushq %rax
 ; X64-NEXT:    movl $511, %edx # imm = 0x1FF
 ; X64-NEXT:    callq memcmp
 ; X64-NEXT:    shrl $31, %eax
 ; X64-NEXT:    # kill: def $al killed $al killed $eax
 ; X64-NEXT:    popq %rcx
 ; X64-NEXT:    retq
   %call = tail call i32 @memcmp(i8* %x, i8* %y, i64 511) nounwind
   %cmp = icmp slt i32 %call, 0
   ret i1 %cmp
 }

 define i1 @length511_gt(i8* %x, i8* %y) nounwind {
 ; X86-LABEL: length511_gt:
 ; X86:       # %bb.0:
 ; X86-NEXT:    pushl $0
 ; X86-NEXT:    pushl $511 # imm = 0x1FF
 ; X86-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NEXT:    calll memcmp
 ; X86-NEXT:    addl $16, %esp
 ; X86-NEXT:    testl %eax, %eax
 ; X86-NEXT:    setg %al
 ; X86-NEXT:    retl
 ;
 ; X64-LABEL: length511_gt:
 ; X64:       # %bb.0:
 ; X64-NEXT:    pushq %rax
 ; X64-NEXT:    movl $511, %edx # imm = 0x1FF
 ; X64-NEXT:    callq memcmp
 ; X64-NEXT:    testl %eax, %eax
 ; X64-NEXT:    setg %al
 ; X64-NEXT:    popq %rcx
 ; X64-NEXT:    retq
   %call = tail call i32 @memcmp(i8* %x, i8* %y, i64 511) nounwind
   %cmp = icmp sgt i32 %call, 0
   ret i1 %cmp
 }

 define i1 @length511_eq_const(i8* %X) nounwind {
 ; X86-LABEL: length511_eq_const:
 ; X86:       # %bb.0:
 ; X86-NEXT:    pushl $0
 ; X86-NEXT:    pushl $511 # imm = 0x1FF
 ; X86-NEXT:    pushl $.L.str
 ; X86-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NEXT:    calll memcmp
 ; X86-NEXT:    addl $16, %esp
 ; X86-NEXT:    testl %eax, %eax
 ; X86-NEXT:    sete %al
 ; X86-NEXT:    retl
 ;
 ; X64-LABEL: length511_eq_const:
 ; X64:       # %bb.0:
 ; X64-NEXT:    pushq %rax
 ; X64-NEXT:    movl $.L.str, %esi
 ; X64-NEXT:    movl $511, %edx # imm = 0x1FF
 ; X64-NEXT:    callq memcmp
 ; X64-NEXT:    testl %eax, %eax
 ; X64-NEXT:    sete %al
 ; X64-NEXT:    popq %rcx
 ; X64-NEXT:    retq
   %m = tail call i32 @memcmp(i8* %X, i8* getelementptr inbounds ([513 x i8], [513 x i8]* @.str, i32 0, i32 0), i64 511) nounwind
   %c = icmp eq i32 %m, 0
   ret i1 %c
 }

 define i32 @length512(i8* %X, i8* %Y) nounwind {
 ; X86-LABEL: length512:
 ; X86:       # %bb.0:
 ; X86-NEXT:    pushl $0
 ; X86-NEXT:    pushl $512 # imm = 0x200
 ; X86-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NEXT:    calll memcmp
 ; X86-NEXT:    addl $16, %esp
 ; X86-NEXT:    retl
 ;
 ; X64-LABEL: length512:
 ; X64:       # %bb.0:
 ; X64-NEXT:    movl $512, %edx # imm = 0x200
 ; X64-NEXT:    jmp memcmp # TAILCALL
   %m = tail call i32 @memcmp(i8* %X, i8* %Y, i64 512) nounwind
   ret i32 %m
 }

 define i1 @length512_eq(i8* %x, i8* %y) nounwind {
 ; X86-LABEL: length512_eq:
 ; X86:       # %bb.0:
 ; X86-NEXT:    pushl $0
 ; X86-NEXT:    pushl $512 # imm = 0x200
 ; X86-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NEXT:    calll memcmp
 ; X86-NEXT:    addl $16, %esp
 ; X86-NEXT:    testl %eax, %eax
 ; X86-NEXT:    setne %al
 ; X86-NEXT:    retl
 ;
 ; X64-LABEL: length512_eq:
 ; X64:       # %bb.0:
 ; X64-NEXT:    pushq %rax
 ; X64-NEXT:    movl $512, %edx # imm = 0x200
 ; X64-NEXT:    callq memcmp
 ; X64-NEXT:    testl %eax, %eax
 ; X64-NEXT:    setne %al
 ; X64-NEXT:    popq %rcx
 ; X64-NEXT:    retq
   %call = tail call i32 @memcmp(i8* %x, i8* %y, i64 512) nounwind
   %cmp = icmp ne i32 %call, 0
   ret i1 %cmp
 }

 define i1 @length512_lt(i8* %x, i8* %y) nounwind {
 ; X86-LABEL: length512_lt:
 ; X86:       # %bb.0:
 ; X86-NEXT:    pushl $0
 ; X86-NEXT:    pushl $512 # imm = 0x200
 ; X86-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NEXT:    calll memcmp
 ; X86-NEXT:    addl $16, %esp
 ; X86-NEXT:    shrl $31, %eax
 ; X86-NEXT:    # kill: def $al killed $al killed $eax
 ; X86-NEXT:    retl
 ;
 ; X64-LABEL: length512_lt:
 ; X64:       # %bb.0:
 ; X64-NEXT:    pushq %rax
 ; X64-NEXT:    movl $512, %edx # imm = 0x200
 ; X64-NEXT:    callq memcmp
 ; X64-NEXT:    shrl $31, %eax
 ; X64-NEXT:    # kill: def $al killed $al killed $eax
 ; X64-NEXT:    popq %rcx
 ; X64-NEXT:    retq
   %call = tail call i32 @memcmp(i8* %x, i8* %y, i64 512) nounwind
   %cmp = icmp slt i32 %call, 0
   ret i1 %cmp
 }

 define i1 @length512_gt(i8* %x, i8* %y) nounwind {
 ; X86-LABEL: length512_gt:
 ; X86:       # %bb.0:
 ; X86-NEXT:    pushl $0
 ; X86-NEXT:    pushl $512 # imm = 0x200
 ; X86-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NEXT:    calll memcmp
 ; X86-NEXT:    addl $16, %esp
 ; X86-NEXT:    testl %eax, %eax
 ; X86-NEXT:    setg %al
 ; X86-NEXT:    retl
 ;
 ; X64-LABEL: length512_gt:
 ; X64:       # %bb.0:
 ; X64-NEXT:    pushq %rax
 ; X64-NEXT:    movl $512, %edx # imm = 0x200
 ; X64-NEXT:    callq memcmp
 ; X64-NEXT:    testl %eax, %eax
 ; X64-NEXT:    setg %al
 ; X64-NEXT:    popq %rcx
 ; X64-NEXT:    retq
   %call = tail call i32 @memcmp(i8* %x, i8* %y, i64 512) nounwind
   %cmp = icmp sgt i32 %call, 0
   ret i1 %cmp
 }

 define i1 @length512_eq_const(i8* %X) nounwind {
 ; X86-LABEL: length512_eq_const:
 ; X86:       # %bb.0:
 ; X86-NEXT:    pushl $0
 ; X86-NEXT:    pushl $512 # imm = 0x200
 ; X86-NEXT:    pushl $.L.str
 ; X86-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NEXT:    calll memcmp
 ; X86-NEXT:    addl $16, %esp
 ; X86-NEXT:    testl %eax, %eax
 ; X86-NEXT:    sete %al
 ; X86-NEXT:    retl
 ;
 ; X64-LABEL: length512_eq_const:
 ; X64:       # %bb.0:
 ; X64-NEXT:    pushq %rax
 ; X64-NEXT:    movl $.L.str, %esi
 ; X64-NEXT:    movl $512, %edx # imm = 0x200
 ; X64-NEXT:    callq memcmp
 ; X64-NEXT:    testl %eax, %eax
 ; X64-NEXT:    sete %al
 ; X64-NEXT:    popq %rcx
 ; X64-NEXT:    retq
   %m = tail call i32 @memcmp(i8* %X, i8* getelementptr inbounds ([513 x i8], [513 x i8]* @.str, i32 0, i32 0), i64 512) nounwind
   %c = icmp eq i32 %m, 0
   ret i1 %c
 }

 ; This checks that we do not do stupid things with huge sizes.
 define i32 @huge_length(i8* %X, i8* %Y) nounwind {
 ; X86-LABEL: huge_length:
 ; X86:       # %bb.0:
 ; X86-NEXT:    pushl $2147483647 # imm = 0x7FFFFFFF
 ; X86-NEXT:    pushl $-1
 ; X86-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NEXT:    calll memcmp
 ; X86-NEXT:    addl $16, %esp
 ; X86-NEXT:    retl
 ;
 ; X64-LABEL: huge_length:
 ; X64:       # %bb.0:
 ; X64-NEXT:    movabsq $9223372036854775807, %rdx # imm = 0x7FFFFFFFFFFFFFFF
 ; X64-NEXT:    jmp memcmp # TAILCALL
   %m = tail call i32 @memcmp(i8* %X, i8* %Y, i64 9223372036854775807) nounwind
   ret i32 %m
 }

 define i1 @huge_length_eq(i8* %X, i8* %Y) nounwind {
 ; X86-LABEL: huge_length_eq:
 ; X86:       # %bb.0:
 ; X86-NEXT:    pushl $2147483647 # imm = 0x7FFFFFFF
 ; X86-NEXT:    pushl $-1
 ; X86-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NEXT:    calll memcmp
 ; X86-NEXT:    addl $16, %esp
 ; X86-NEXT:    testl %eax, %eax
 ; X86-NEXT:    sete %al
 ; X86-NEXT:    retl
 ;
 ; X64-LABEL: huge_length_eq:
 ; X64:       # %bb.0:
 ; X64-NEXT:    pushq %rax
 ; X64-NEXT:    movabsq $9223372036854775807, %rdx # imm = 0x7FFFFFFFFFFFFFFF
 ; X64-NEXT:    callq memcmp
 ; X64-NEXT:    testl %eax, %eax
 ; X64-NEXT:    sete %al
 ; X64-NEXT:    popq %rcx
 ; X64-NEXT:    retq
   %m = tail call i32 @memcmp(i8* %X, i8* %Y, i64 9223372036854775807) nounwind
   %c = icmp eq i32 %m, 0
   ret i1 %c
 }

 ; This checks non-constant sizes.
 define i32 @nonconst_length(i8* %X, i8* %Y, i64 %size) nounwind {
 ; X86-LABEL: nonconst_length:
 ; X86:       # %bb.0:
 ; X86-NEXT:    jmp memcmp # TAILCALL
 ;
 ; X64-LABEL: nonconst_length:
 ; X64:       # %bb.0:
 ; X64-NEXT:    jmp memcmp # TAILCALL
   %m = tail call i32 @memcmp(i8* %X, i8* %Y, i64 %size) nounwind
   ret i32 %m
 }

 define i1 @nonconst_length_eq(i8* %X, i8* %Y, i64 %size) nounwind {
 ; X86-LABEL: nonconst_length_eq:
 ; X86:       # %bb.0:
 ; X86-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NEXT:    pushl {{[0-9]+}}(%esp)
 ; X86-NEXT:    calll memcmp
 ; X86-NEXT:    addl $16, %esp
 ; X86-NEXT:    testl %eax, %eax
 ; X86-NEXT:    sete %al
 ; X86-NEXT:    retl
 ;
 ; X64-LABEL: nonconst_length_eq:
 ; X64:       # %bb.0:
 ; X64-NEXT:    pushq %rax
 ; X64-NEXT:    callq memcmp
 ; X64-NEXT:    testl %eax, %eax
 ; X64-NEXT:    sete %al
 ; X64-NEXT:    popq %rcx
 ; X64-NEXT:    retq
   %m = tail call i32 @memcmp(i8* %X, i8* %Y, i64 %size) nounwind
   %c = icmp eq i32 %m, 0
   ret i1 %c
 }