llvm/test/CodeGen/X86/widen-load-of-small-alloca-with-zero-upper-half.ll - llvm-project - Git at Google

 ; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
 ; RUN: llc < %s -mtriple=x86_64-unknown-linux-gnu -mattr=+sse2,-bmi2,+slow-shld | FileCheck %s --check-prefixes=ALL,X64,X64-NO-BMI2,X64-NO-SHLD,X64-NO-BMI2-NO-SHLD
 ; RUN: llc < %s -mtriple=x86_64-unknown-linux-gnu -mattr=+sse2,-bmi2,-slow-shld | FileCheck %s --check-prefixes=ALL,X64,X64-NO-BMI2,X64-SHLD,X64-NO-BMI2-HAVE-SHLD
 ; RUN: llc < %s -mtriple=x86_64-unknown-linux-gnu -mattr=+sse2,+bmi2,+slow-shld | FileCheck %s --check-prefixes=ALL,X64,X64-BMI2,X64-NO-SHLD,X64-HAVE-BMI2-NO-SHLD
 ; RUN: llc < %s -mtriple=x86_64-unknown-linux-gnu -mattr=+sse2,+bmi2,-slow-shld | FileCheck %s --check-prefixes=ALL,X64,X64-BMI2,X64-SHLD,X64-HAVE-BMI2-HAVE-SHLD
 ; RUN: llc < %s -mtriple=i686-unknown-linux-gnu -mattr=+sse2,-bmi2,+slow-shld | FileCheck %s --check-prefixes=ALL,X86,X86-NO-BMI2,X86-NO-SHLD,X86-NO-BMI2-NO-SHLD
 ; RUN: llc < %s -mtriple=i686-unknown-linux-gnu -mattr=+sse2,-bmi2,-slow-shld | FileCheck %s --check-prefixes=ALL,X86,X86-NO-BMI2,X86-SHLD,X86-NO-BMI2-HAVE-SHLD
 ; RUN: llc < %s -mtriple=i686-unknown-linux-gnu -mattr=+sse2,+bmi2,+slow-shld | FileCheck %s --check-prefixes=ALL,X86,X86-BMI2,X86-NO-SHLD,X86-HAVE-BMI2-NO-SHLD
 ; RUN: llc < %s -mtriple=i686-unknown-linux-gnu -mattr=+sse2,+bmi2,-slow-shld | FileCheck %s --check-prefixes=ALL,X86,X86-BMI2,X86-SHLD,X86-HAVE-BMI2-HAVE-SHLD

 define void @load_1byte_chunk_of_2byte_alloca_with_zero_upper_half(ptr %src, i64 %byteOff, ptr %dst) nounwind {
 ; X64-NO-BMI2-LABEL: load_1byte_chunk_of_2byte_alloca_with_zero_upper_half:
 ; X64-NO-BMI2:       # %bb.0:
 ; X64-NO-BMI2-NEXT:    movzbl (%rdi), %eax
 ; X64-NO-BMI2-NEXT:    leal (,%rsi,8), %ecx
 ; X64-NO-BMI2-NEXT:    # kill: def $cl killed $cl killed $ecx
 ; X64-NO-BMI2-NEXT:    shrl %cl, %eax
 ; X64-NO-BMI2-NEXT:    movb %al, (%rdx)
 ; X64-NO-BMI2-NEXT:    retq
 ;
 ; X64-BMI2-LABEL: load_1byte_chunk_of_2byte_alloca_with_zero_upper_half:
 ; X64-BMI2:       # %bb.0:
 ; X64-BMI2-NEXT:    movzbl (%rdi), %eax
 ; X64-BMI2-NEXT:    shll $3, %esi
 ; X64-BMI2-NEXT:    shrxl %esi, %eax, %eax
 ; X64-BMI2-NEXT:    movb %al, (%rdx)
 ; X64-BMI2-NEXT:    retq
 ;
 ; X86-NO-BMI2-LABEL: load_1byte_chunk_of_2byte_alloca_with_zero_upper_half:
 ; X86-NO-BMI2:       # %bb.0:
 ; X86-NO-BMI2-NEXT:    movl {{[0-9]+}}(%esp), %edx
 ; X86-NO-BMI2-NEXT:    movl {{[0-9]+}}(%esp), %ecx
 ; X86-NO-BMI2-NEXT:    movl {{[0-9]+}}(%esp), %eax
 ; X86-NO-BMI2-NEXT:    movzbl (%eax), %eax
 ; X86-NO-BMI2-NEXT:    shll $3, %ecx
 ; X86-NO-BMI2-NEXT:    # kill: def $cl killed $cl killed $ecx
 ; X86-NO-BMI2-NEXT:    shrl %cl, %eax
 ; X86-NO-BMI2-NEXT:    movb %al, (%edx)
 ; X86-NO-BMI2-NEXT:    retl
 ;
 ; X86-BMI2-LABEL: load_1byte_chunk_of_2byte_alloca_with_zero_upper_half:
 ; X86-BMI2:       # %bb.0:
 ; X86-BMI2-NEXT:    movl {{[0-9]+}}(%esp), %eax
 ; X86-BMI2-NEXT:    movl {{[0-9]+}}(%esp), %ecx
 ; X86-BMI2-NEXT:    movl {{[0-9]+}}(%esp), %edx
 ; X86-BMI2-NEXT:    movzbl (%edx), %edx
 ; X86-BMI2-NEXT:    shll $3, %ecx
 ; X86-BMI2-NEXT:    shrxl %ecx, %edx, %ecx
 ; X86-BMI2-NEXT:    movb %cl, (%eax)
 ; X86-BMI2-NEXT:    retl
   %init1 = load i8, ptr %src, align 1
   %intermediate.sroa.0.0.vec.insert = insertelement <2 x i8> <i8 poison, i8 0>, i8 %init1, i64 0
   %intermediate.val.frozen = freeze <2 x i8> %intermediate.sroa.0.0.vec.insert
   %intermediate.val.frozen.bits = bitcast <2 x i8> %intermediate.val.frozen to i16
   %byteOff.tr = trunc i64 %byteOff to i16
   %byteOff.numbits.wide = shl i16 %byteOff.tr, 3
   %intermediate.val.frozen.bits.positioned = lshr i16 %intermediate.val.frozen.bits, %byteOff.numbits.wide
   %intermediate.val.frozen.bits.positioned.extracted = trunc i16 %intermediate.val.frozen.bits.positioned to i8
   %1 = insertelement <1 x i8> poison, i8 %intermediate.val.frozen.bits.positioned.extracted, i64 0
   store <1 x i8> %1, ptr %dst, align 1
   ret void
 }

 define void @load_1byte_chunk_of_4byte_alloca_with_zero_upper_half(ptr %src, i64 %byteOff, ptr %dst) nounwind {
 ; X64-NO-BMI2-LABEL: load_1byte_chunk_of_4byte_alloca_with_zero_upper_half:
 ; X64-NO-BMI2:       # %bb.0:
 ; X64-NO-BMI2-NEXT:    movzwl (%rdi), %eax
 ; X64-NO-BMI2-NEXT:    leal (,%rsi,8), %ecx
 ; X64-NO-BMI2-NEXT:    # kill: def $cl killed $cl killed $ecx
 ; X64-NO-BMI2-NEXT:    shrl %cl, %eax
 ; X64-NO-BMI2-NEXT:    movb %al, (%rdx)
 ; X64-NO-BMI2-NEXT:    retq
 ;
 ; X64-BMI2-LABEL: load_1byte_chunk_of_4byte_alloca_with_zero_upper_half:
 ; X64-BMI2:       # %bb.0:
 ; X64-BMI2-NEXT:    movzwl (%rdi), %eax
 ; X64-BMI2-NEXT:    shll $3, %esi
 ; X64-BMI2-NEXT:    shrxl %esi, %eax, %eax
 ; X64-BMI2-NEXT:    movb %al, (%rdx)
 ; X64-BMI2-NEXT:    retq
 ;
 ; X86-NO-BMI2-LABEL: load_1byte_chunk_of_4byte_alloca_with_zero_upper_half:
 ; X86-NO-BMI2:       # %bb.0:
 ; X86-NO-BMI2-NEXT:    movl {{[0-9]+}}(%esp), %edx
 ; X86-NO-BMI2-NEXT:    movl {{[0-9]+}}(%esp), %ecx
 ; X86-NO-BMI2-NEXT:    movl {{[0-9]+}}(%esp), %eax
 ; X86-NO-BMI2-NEXT:    movzwl (%eax), %eax
 ; X86-NO-BMI2-NEXT:    shll $3, %ecx
 ; X86-NO-BMI2-NEXT:    # kill: def $cl killed $cl killed $ecx
 ; X86-NO-BMI2-NEXT:    shrl %cl, %eax
 ; X86-NO-BMI2-NEXT:    movb %al, (%edx)
 ; X86-NO-BMI2-NEXT:    retl
 ;
 ; X86-BMI2-LABEL: load_1byte_chunk_of_4byte_alloca_with_zero_upper_half:
 ; X86-BMI2:       # %bb.0:
 ; X86-BMI2-NEXT:    movl {{[0-9]+}}(%esp), %eax
 ; X86-BMI2-NEXT:    movl {{[0-9]+}}(%esp), %ecx
 ; X86-BMI2-NEXT:    movl {{[0-9]+}}(%esp), %edx
 ; X86-BMI2-NEXT:    movzwl (%edx), %edx
 ; X86-BMI2-NEXT:    shll $3, %ecx
 ; X86-BMI2-NEXT:    shrxl %ecx, %edx, %ecx
 ; X86-BMI2-NEXT:    movb %cl, (%eax)
 ; X86-BMI2-NEXT:    retl
   %init = load <2 x i8>, ptr %src, align 1
   %intermediate.sroa.0.0.vec.expand = shufflevector <2 x i8> %init, <2 x i8> poison, <4 x i32> <i32 0, i32 1, i32 undef, i32 undef>
   %intermediate.sroa.0.0.vecblend = shufflevector <4 x i8> %intermediate.sroa.0.0.vec.expand, <4 x i8> <i8 poison, i8 poison, i8 0, i8 0>, <4 x i32> <i32 0, i32 1, i32 6, i32 7>
   %intermediate.val.frozen = freeze <4 x i8> %intermediate.sroa.0.0.vecblend
   %intermediate.val.frozen.bits = bitcast <4 x i8> %intermediate.val.frozen to i32
   %byteOff.tr = trunc i64 %byteOff to i32
   %byteOff.numbits.wide = shl i32 %byteOff.tr, 3
   %intermediate.val.frozen.bits.positioned = lshr i32 %intermediate.val.frozen.bits, %byteOff.numbits.wide
   %intermediate.val.frozen.bits.positioned.extracted = trunc i32 %intermediate.val.frozen.bits.positioned to i8
   %1 = insertelement <1 x i8> poison, i8 %intermediate.val.frozen.bits.positioned.extracted, i64 0
   store <1 x i8> %1, ptr %dst, align 1
   ret void
 }

 define void @load_2byte_chunk_of_4byte_alloca_with_zero_upper_half(ptr %src, i64 %byteOff, ptr %dst) nounwind {
 ; X64-NO-BMI2-LABEL: load_2byte_chunk_of_4byte_alloca_with_zero_upper_half:
 ; X64-NO-BMI2:       # %bb.0:
 ; X64-NO-BMI2-NEXT:    movzwl (%rdi), %eax
 ; X64-NO-BMI2-NEXT:    leal (,%rsi,8), %ecx
 ; X64-NO-BMI2-NEXT:    # kill: def $cl killed $cl killed $ecx
 ; X64-NO-BMI2-NEXT:    shrl %cl, %eax
 ; X64-NO-BMI2-NEXT:    movw %ax, (%rdx)
 ; X64-NO-BMI2-NEXT:    retq
 ;
 ; X64-BMI2-LABEL: load_2byte_chunk_of_4byte_alloca_with_zero_upper_half:
 ; X64-BMI2:       # %bb.0:
 ; X64-BMI2-NEXT:    movzwl (%rdi), %eax
 ; X64-BMI2-NEXT:    shll $3, %esi
 ; X64-BMI2-NEXT:    shrxl %esi, %eax, %eax
 ; X64-BMI2-NEXT:    movw %ax, (%rdx)
 ; X64-BMI2-NEXT:    retq
 ;
 ; X86-NO-BMI2-LABEL: load_2byte_chunk_of_4byte_alloca_with_zero_upper_half:
 ; X86-NO-BMI2:       # %bb.0:
 ; X86-NO-BMI2-NEXT:    movl {{[0-9]+}}(%esp), %eax
 ; X86-NO-BMI2-NEXT:    movl {{[0-9]+}}(%esp), %ecx
 ; X86-NO-BMI2-NEXT:    movl {{[0-9]+}}(%esp), %edx
 ; X86-NO-BMI2-NEXT:    movzwl (%edx), %edx
 ; X86-NO-BMI2-NEXT:    shll $3, %ecx
 ; X86-NO-BMI2-NEXT:    # kill: def $cl killed $cl killed $ecx
 ; X86-NO-BMI2-NEXT:    shrl %cl, %edx
 ; X86-NO-BMI2-NEXT:    movw %dx, (%eax)
 ; X86-NO-BMI2-NEXT:    retl
 ;
 ; X86-BMI2-LABEL: load_2byte_chunk_of_4byte_alloca_with_zero_upper_half:
 ; X86-BMI2:       # %bb.0:
 ; X86-BMI2-NEXT:    movl {{[0-9]+}}(%esp), %eax
 ; X86-BMI2-NEXT:    movl {{[0-9]+}}(%esp), %ecx
 ; X86-BMI2-NEXT:    movl {{[0-9]+}}(%esp), %edx
 ; X86-BMI2-NEXT:    movzwl (%edx), %edx
 ; X86-BMI2-NEXT:    shll $3, %ecx
 ; X86-BMI2-NEXT:    shrxl %ecx, %edx, %ecx
 ; X86-BMI2-NEXT:    movw %cx, (%eax)
 ; X86-BMI2-NEXT:    retl
   %init = load <2 x i8>, ptr %src, align 1
   %intermediate.sroa.0.0.vec.expand = shufflevector <2 x i8> %init, <2 x i8> poison, <4 x i32> <i32 0, i32 1, i32 undef, i32 undef>
   %intermediate.sroa.0.0.vecblend = shufflevector <4 x i8> %intermediate.sroa.0.0.vec.expand, <4 x i8> <i8 poison, i8 poison, i8 0, i8 0>, <4 x i32> <i32 0, i32 1, i32 6, i32 7>
   %intermediate.val.frozen = freeze <4 x i8> %intermediate.sroa.0.0.vecblend
   %intermediate.val.frozen.bits = bitcast <4 x i8> %intermediate.val.frozen to i32
   %byteOff.tr = trunc i64 %byteOff to i32
   %byteOff.numbits.wide = shl i32 %byteOff.tr, 3
   %intermediate.val.frozen.bits.positioned = lshr i32 %intermediate.val.frozen.bits, %byteOff.numbits.wide
   %intermediate.val.frozen.bits.positioned.extracted = trunc i32 %intermediate.val.frozen.bits.positioned to i16
   store i16 %intermediate.val.frozen.bits.positioned.extracted, ptr %dst, align 2
   ret void
 }

 define void @load_1byte_chunk_of_8byte_alloca_with_zero_upper_half(ptr %src, i64 %byteOff, ptr %dst) nounwind {
 ; X64-NO-BMI2-LABEL: load_1byte_chunk_of_8byte_alloca_with_zero_upper_half:
 ; X64-NO-BMI2:       # %bb.0:
 ; X64-NO-BMI2-NEXT:    leal (,%rsi,8), %ecx
 ; X64-NO-BMI2-NEXT:    movl (%rdi), %eax
 ; X64-NO-BMI2-NEXT:    # kill: def $cl killed $cl killed $ecx
 ; X64-NO-BMI2-NEXT:    shrq %cl, %rax
 ; X64-NO-BMI2-NEXT:    movb %al, (%rdx)
 ; X64-NO-BMI2-NEXT:    retq
 ;
 ; X64-BMI2-LABEL: load_1byte_chunk_of_8byte_alloca_with_zero_upper_half:
 ; X64-BMI2:       # %bb.0:
 ; X64-BMI2-NEXT:    shll $3, %esi
 ; X64-BMI2-NEXT:    movl (%rdi), %eax
 ; X64-BMI2-NEXT:    shrxq %rsi, %rax, %rax
 ; X64-BMI2-NEXT:    movb %al, (%rdx)
 ; X64-BMI2-NEXT:    retq
 ;
 ; X86-NO-BMI2-NO-SHLD-LABEL: load_1byte_chunk_of_8byte_alloca_with_zero_upper_half:
 ; X86-NO-BMI2-NO-SHLD:       # %bb.0:
 ; X86-NO-BMI2-NO-SHLD-NEXT:    pushl %ebx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %eax
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %ecx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %edx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl (%edx), %edx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    shll $3, %ecx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    shrl %cl, %edx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    xorl %ebx, %ebx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    testb $32, %cl
 ; X86-NO-BMI2-NO-SHLD-NEXT:    cmovel %edx, %ebx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movb %bl, (%eax)
 ; X86-NO-BMI2-NO-SHLD-NEXT:    popl %ebx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    retl
 ;
 ; X86-SHLD-LABEL: load_1byte_chunk_of_8byte_alloca_with_zero_upper_half:
 ; X86-SHLD:       # %bb.0:
 ; X86-SHLD-NEXT:    pushl %esi
 ; X86-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %eax
 ; X86-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %ecx
 ; X86-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %edx
 ; X86-SHLD-NEXT:    movl (%edx), %edx
 ; X86-SHLD-NEXT:    shll $3, %ecx
 ; X86-SHLD-NEXT:    xorl %esi, %esi
 ; X86-SHLD-NEXT:    shrdl %cl, %esi, %edx
 ; X86-SHLD-NEXT:    testb $32, %cl
 ; X86-SHLD-NEXT:    cmovnel %esi, %edx
 ; X86-SHLD-NEXT:    movb %dl, (%eax)
 ; X86-SHLD-NEXT:    popl %esi
 ; X86-SHLD-NEXT:    retl
 ;
 ; X86-HAVE-BMI2-NO-SHLD-LABEL: load_1byte_chunk_of_8byte_alloca_with_zero_upper_half:
 ; X86-HAVE-BMI2-NO-SHLD:       # %bb.0:
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    pushl %ebx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %eax
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %ecx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %edx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    shll $3, %ecx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    shrxl %ecx, (%edx), %edx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    xorl %ebx, %ebx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    testb $32, %cl
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    cmovel %edx, %ebx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movb %bl, (%eax)
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    popl %ebx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    retl
   %init = load <4 x i8>, ptr %src, align 1
   %intermediate.sroa.0.0.vec.expand = shufflevector <4 x i8> %init, <4 x i8> poison, <8 x i32> <i32 0, i32 1, i32 2, i32 3, i32 undef, i32 undef, i32 undef, i32 undef>
   %intermediate.sroa.0.0.vecblend = shufflevector <8 x i8> %intermediate.sroa.0.0.vec.expand, <8 x i8> <i8 poison, i8 poison, i8 poison, i8 poison, i8 0, i8 0, i8 0, i8 0>, <8 x i32> <i32 0, i32 1, i32 2, i32 3, i32 12, i32 13, i32 14, i32 15>
   %byteOff.numbits = shl nuw nsw i64 %byteOff, 3
   %intermediate.val.frozen = freeze <8 x i8> %intermediate.sroa.0.0.vecblend
   %intermediate.val.frozen.bits = bitcast <8 x i8> %intermediate.val.frozen to i64
   %intermediate.val.frozen.bits.positioned = lshr i64 %intermediate.val.frozen.bits, %byteOff.numbits
   %intermediate.val.frozen.bits.positioned.extracted = trunc i64 %intermediate.val.frozen.bits.positioned to i8
   %1 = insertelement <1 x i8> poison, i8 %intermediate.val.frozen.bits.positioned.extracted, i64 0
   store <1 x i8> %1, ptr %dst, align 1
   ret void
 }

 define void @load_2byte_chunk_of_8byte_alloca_with_zero_upper_half(ptr %src, i64 %byteOff, ptr %dst) nounwind {
 ; X64-NO-BMI2-LABEL: load_2byte_chunk_of_8byte_alloca_with_zero_upper_half:
 ; X64-NO-BMI2:       # %bb.0:
 ; X64-NO-BMI2-NEXT:    leal (,%rsi,8), %ecx
 ; X64-NO-BMI2-NEXT:    movl (%rdi), %eax
 ; X64-NO-BMI2-NEXT:    # kill: def $cl killed $cl killed $ecx
 ; X64-NO-BMI2-NEXT:    shrq %cl, %rax
 ; X64-NO-BMI2-NEXT:    movw %ax, (%rdx)
 ; X64-NO-BMI2-NEXT:    retq
 ;
 ; X64-BMI2-LABEL: load_2byte_chunk_of_8byte_alloca_with_zero_upper_half:
 ; X64-BMI2:       # %bb.0:
 ; X64-BMI2-NEXT:    shll $3, %esi
 ; X64-BMI2-NEXT:    movl (%rdi), %eax
 ; X64-BMI2-NEXT:    shrxq %rsi, %rax, %rax
 ; X64-BMI2-NEXT:    movw %ax, (%rdx)
 ; X64-BMI2-NEXT:    retq
 ;
 ; X86-NO-BMI2-NO-SHLD-LABEL: load_2byte_chunk_of_8byte_alloca_with_zero_upper_half:
 ; X86-NO-BMI2-NO-SHLD:       # %bb.0:
 ; X86-NO-BMI2-NO-SHLD-NEXT:    pushl %esi
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %eax
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %ecx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %edx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl (%edx), %edx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    shll $3, %ecx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    shrl %cl, %edx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    xorl %esi, %esi
 ; X86-NO-BMI2-NO-SHLD-NEXT:    testb $32, %cl
 ; X86-NO-BMI2-NO-SHLD-NEXT:    cmovel %edx, %esi
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movw %si, (%eax)
 ; X86-NO-BMI2-NO-SHLD-NEXT:    popl %esi
 ; X86-NO-BMI2-NO-SHLD-NEXT:    retl
 ;
 ; X86-SHLD-LABEL: load_2byte_chunk_of_8byte_alloca_with_zero_upper_half:
 ; X86-SHLD:       # %bb.0:
 ; X86-SHLD-NEXT:    pushl %esi
 ; X86-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %eax
 ; X86-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %ecx
 ; X86-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %edx
 ; X86-SHLD-NEXT:    movl (%edx), %edx
 ; X86-SHLD-NEXT:    shll $3, %ecx
 ; X86-SHLD-NEXT:    xorl %esi, %esi
 ; X86-SHLD-NEXT:    shrdl %cl, %esi, %edx
 ; X86-SHLD-NEXT:    testb $32, %cl
 ; X86-SHLD-NEXT:    cmovnel %esi, %edx
 ; X86-SHLD-NEXT:    movw %dx, (%eax)
 ; X86-SHLD-NEXT:    popl %esi
 ; X86-SHLD-NEXT:    retl
 ;
 ; X86-HAVE-BMI2-NO-SHLD-LABEL: load_2byte_chunk_of_8byte_alloca_with_zero_upper_half:
 ; X86-HAVE-BMI2-NO-SHLD:       # %bb.0:
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    pushl %esi
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %ecx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %eax
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %edx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    shll $3, %eax
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    shrxl %eax, (%edx), %edx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    xorl %esi, %esi
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    testb $32, %al
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    cmovel %edx, %esi
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movw %si, (%ecx)
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    popl %esi
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    retl
   %init = load <4 x i8>, ptr %src, align 1
   %intermediate.sroa.0.0.vec.expand = shufflevector <4 x i8> %init, <4 x i8> poison, <8 x i32> <i32 0, i32 1, i32 2, i32 3, i32 undef, i32 undef, i32 undef, i32 undef>
   %intermediate.sroa.0.0.vecblend = shufflevector <8 x i8> %intermediate.sroa.0.0.vec.expand, <8 x i8> <i8 poison, i8 poison, i8 poison, i8 poison, i8 0, i8 0, i8 0, i8 0>, <8 x i32> <i32 0, i32 1, i32 2, i32 3, i32 12, i32 13, i32 14, i32 15>
   %byteOff.numbits = shl nuw nsw i64 %byteOff, 3
   %intermediate.val.frozen = freeze <8 x i8> %intermediate.sroa.0.0.vecblend
   %intermediate.val.frozen.bits = bitcast <8 x i8> %intermediate.val.frozen to i64
   %intermediate.val.frozen.bits.positioned = lshr i64 %intermediate.val.frozen.bits, %byteOff.numbits
   %intermediate.val.frozen.bits.positioned.extracted = trunc i64 %intermediate.val.frozen.bits.positioned to i16
   store i16 %intermediate.val.frozen.bits.positioned.extracted, ptr %dst, align 2
   ret void
 }

 define void @load_4byte_chunk_of_8byte_alloca_with_zero_upper_half(ptr %src, i64 %byteOff, ptr %dst) nounwind {
 ; X64-NO-BMI2-LABEL: load_4byte_chunk_of_8byte_alloca_with_zero_upper_half:
 ; X64-NO-BMI2:       # %bb.0:
 ; X64-NO-BMI2-NEXT:    leal (,%rsi,8), %ecx
 ; X64-NO-BMI2-NEXT:    movl (%rdi), %eax
 ; X64-NO-BMI2-NEXT:    # kill: def $cl killed $cl killed $ecx
 ; X64-NO-BMI2-NEXT:    shrq %cl, %rax
 ; X64-NO-BMI2-NEXT:    movl %eax, (%rdx)
 ; X64-NO-BMI2-NEXT:    retq
 ;
 ; X64-BMI2-LABEL: load_4byte_chunk_of_8byte_alloca_with_zero_upper_half:
 ; X64-BMI2:       # %bb.0:
 ; X64-BMI2-NEXT:    shll $3, %esi
 ; X64-BMI2-NEXT:    movl (%rdi), %eax
 ; X64-BMI2-NEXT:    shrxq %rsi, %rax, %rax
 ; X64-BMI2-NEXT:    movl %eax, (%rdx)
 ; X64-BMI2-NEXT:    retq
 ;
 ; X86-NO-BMI2-NO-SHLD-LABEL: load_4byte_chunk_of_8byte_alloca_with_zero_upper_half:
 ; X86-NO-BMI2-NO-SHLD:       # %bb.0:
 ; X86-NO-BMI2-NO-SHLD-NEXT:    pushl %esi
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %eax
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %ecx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %edx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl (%edx), %edx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    shll $3, %ecx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    shrl %cl, %edx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    xorl %esi, %esi
 ; X86-NO-BMI2-NO-SHLD-NEXT:    testb $32, %cl
 ; X86-NO-BMI2-NO-SHLD-NEXT:    cmovel %edx, %esi
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl %esi, (%eax)
 ; X86-NO-BMI2-NO-SHLD-NEXT:    popl %esi
 ; X86-NO-BMI2-NO-SHLD-NEXT:    retl
 ;
 ; X86-SHLD-LABEL: load_4byte_chunk_of_8byte_alloca_with_zero_upper_half:
 ; X86-SHLD:       # %bb.0:
 ; X86-SHLD-NEXT:    pushl %esi
 ; X86-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %eax
 ; X86-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %ecx
 ; X86-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %edx
 ; X86-SHLD-NEXT:    movl (%edx), %edx
 ; X86-SHLD-NEXT:    shll $3, %ecx
 ; X86-SHLD-NEXT:    xorl %esi, %esi
 ; X86-SHLD-NEXT:    shrdl %cl, %esi, %edx
 ; X86-SHLD-NEXT:    testb $32, %cl
 ; X86-SHLD-NEXT:    cmovnel %esi, %edx
 ; X86-SHLD-NEXT:    movl %edx, (%eax)
 ; X86-SHLD-NEXT:    popl %esi
 ; X86-SHLD-NEXT:    retl
 ;
 ; X86-HAVE-BMI2-NO-SHLD-LABEL: load_4byte_chunk_of_8byte_alloca_with_zero_upper_half:
 ; X86-HAVE-BMI2-NO-SHLD:       # %bb.0:
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    pushl %esi
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %ecx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %eax
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %edx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    shll $3, %eax
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    shrxl %eax, (%edx), %edx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    xorl %esi, %esi
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    testb $32, %al
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    cmovel %edx, %esi
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movl %esi, (%ecx)
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    popl %esi
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    retl
   %init = load <4 x i8>, ptr %src, align 1
   %intermediate.sroa.0.0.vec.expand = shufflevector <4 x i8> %init, <4 x i8> poison, <8 x i32> <i32 0, i32 1, i32 2, i32 3, i32 undef, i32 undef, i32 undef, i32 undef>
   %intermediate.sroa.0.0.vecblend = shufflevector <8 x i8> %intermediate.sroa.0.0.vec.expand, <8 x i8> <i8 poison, i8 poison, i8 poison, i8 poison, i8 0, i8 0, i8 0, i8 0>, <8 x i32> <i32 0, i32 1, i32 2, i32 3, i32 12, i32 13, i32 14, i32 15>
   %byteOff.numbits = shl nuw nsw i64 %byteOff, 3
   %intermediate.val.frozen = freeze <8 x i8> %intermediate.sroa.0.0.vecblend
   %intermediate.val.frozen.bits = bitcast <8 x i8> %intermediate.val.frozen to i64
   %intermediate.val.frozen.bits.positioned = lshr i64 %intermediate.val.frozen.bits, %byteOff.numbits
   %intermediate.val.frozen.bits.positioned.extracted = trunc i64 %intermediate.val.frozen.bits.positioned to i32
   store i32 %intermediate.val.frozen.bits.positioned.extracted, ptr %dst, align 4
   ret void
 }

 define void @load_1byte_chunk_of_16byte_alloca_with_zero_upper_half(ptr %src, i64 %byteOff, ptr %dst) nounwind {
 ; X64-NO-BMI2-NO-SHLD-LABEL: load_1byte_chunk_of_16byte_alloca_with_zero_upper_half:
 ; X64-NO-BMI2-NO-SHLD:       # %bb.0:
 ; X64-NO-BMI2-NO-SHLD-NEXT:    movq %rsi, %rcx
 ; X64-NO-BMI2-NO-SHLD-NEXT:    movq (%rdi), %rax
 ; X64-NO-BMI2-NO-SHLD-NEXT:    shll $3, %ecx
 ; X64-NO-BMI2-NO-SHLD-NEXT:    shrq %cl, %rax
 ; X64-NO-BMI2-NO-SHLD-NEXT:    xorl %esi, %esi
 ; X64-NO-BMI2-NO-SHLD-NEXT:    testb $64, %cl
 ; X64-NO-BMI2-NO-SHLD-NEXT:    cmoveq %rax, %rsi
 ; X64-NO-BMI2-NO-SHLD-NEXT:    movb %sil, (%rdx)
 ; X64-NO-BMI2-NO-SHLD-NEXT:    retq
 ;
 ; X64-SHLD-LABEL: load_1byte_chunk_of_16byte_alloca_with_zero_upper_half:
 ; X64-SHLD:       # %bb.0:
 ; X64-SHLD-NEXT:    movq %rsi, %rcx
 ; X64-SHLD-NEXT:    movq (%rdi), %rax
 ; X64-SHLD-NEXT:    shll $3, %ecx
 ; X64-SHLD-NEXT:    xorl %esi, %esi
 ; X64-SHLD-NEXT:    shrdq %cl, %rsi, %rax
 ; X64-SHLD-NEXT:    testb $64, %cl
 ; X64-SHLD-NEXT:    cmovneq %rsi, %rax
 ; X64-SHLD-NEXT:    movb %al, (%rdx)
 ; X64-SHLD-NEXT:    retq
 ;
 ; X64-HAVE-BMI2-NO-SHLD-LABEL: load_1byte_chunk_of_16byte_alloca_with_zero_upper_half:
 ; X64-HAVE-BMI2-NO-SHLD:       # %bb.0:
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    shll $3, %esi
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    shrxq %rsi, (%rdi), %rax
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    xorl %ecx, %ecx
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    testb $64, %sil
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    cmoveq %rax, %rcx
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    movb %cl, (%rdx)
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    retq
 ;
 ; X86-NO-BMI2-NO-SHLD-LABEL: load_1byte_chunk_of_16byte_alloca_with_zero_upper_half:
 ; X86-NO-BMI2-NO-SHLD:       # %bb.0:
 ; X86-NO-BMI2-NO-SHLD-NEXT:    pushl %esi
 ; X86-NO-BMI2-NO-SHLD-NEXT:    subl $40, %esp
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %ecx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %eax
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %edx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movq {{.*#+}} xmm0 = mem[0],zero
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movq {{.*#+}} xmm0 = xmm0[0],zero
 ; X86-NO-BMI2-NO-SHLD-NEXT:    shll $3, %ecx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    xorps %xmm1, %xmm1
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movaps %xmm1, {{[0-9]+}}(%esp)
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movdqa %xmm0, (%esp)
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl %ecx, %edx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    shrb $3, %dl
 ; X86-NO-BMI2-NO-SHLD-NEXT:    andb $12, %dl
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movzbl %dl, %edx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl (%esp,%edx), %esi
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl 4(%esp,%edx), %edx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    shrl %cl, %esi
 ; X86-NO-BMI2-NO-SHLD-NEXT:    notb %cl
 ; X86-NO-BMI2-NO-SHLD-NEXT:    addl %edx, %edx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    # kill: def $cl killed $cl killed $ecx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    shll %cl, %edx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    orl %esi, %edx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movb %dl, (%eax)
 ; X86-NO-BMI2-NO-SHLD-NEXT:    addl $40, %esp
 ; X86-NO-BMI2-NO-SHLD-NEXT:    popl %esi
 ; X86-NO-BMI2-NO-SHLD-NEXT:    retl
 ;
 ; X86-SHLD-LABEL: load_1byte_chunk_of_16byte_alloca_with_zero_upper_half:
 ; X86-SHLD:       # %bb.0:
 ; X86-SHLD-NEXT:    pushl %ebx
 ; X86-SHLD-NEXT:    subl $40, %esp
 ; X86-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %ecx
 ; X86-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %eax
 ; X86-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %edx
 ; X86-SHLD-NEXT:    movq {{.*#+}} xmm0 = mem[0],zero
 ; X86-SHLD-NEXT:    movq {{.*#+}} xmm0 = xmm0[0],zero
 ; X86-SHLD-NEXT:    shll $3, %ecx
 ; X86-SHLD-NEXT:    xorps %xmm1, %xmm1
 ; X86-SHLD-NEXT:    movaps %xmm1, {{[0-9]+}}(%esp)
 ; X86-SHLD-NEXT:    movdqa %xmm0, (%esp)
 ; X86-SHLD-NEXT:    movl %ecx, %edx
 ; X86-SHLD-NEXT:    shrb $3, %dl
 ; X86-SHLD-NEXT:    andb $12, %dl
 ; X86-SHLD-NEXT:    movzbl %dl, %edx
 ; X86-SHLD-NEXT:    movl (%esp,%edx), %ebx
 ; X86-SHLD-NEXT:    movl 4(%esp,%edx), %edx
 ; X86-SHLD-NEXT:    # kill: def $cl killed $cl killed $ecx
 ; X86-SHLD-NEXT:    shrdl %cl, %edx, %ebx
 ; X86-SHLD-NEXT:    movb %bl, (%eax)
 ; X86-SHLD-NEXT:    addl $40, %esp
 ; X86-SHLD-NEXT:    popl %ebx
 ; X86-SHLD-NEXT:    retl
 ;
 ; X86-HAVE-BMI2-NO-SHLD-LABEL: load_1byte_chunk_of_16byte_alloca_with_zero_upper_half:
 ; X86-HAVE-BMI2-NO-SHLD:       # %bb.0:
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    pushl %esi
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    subl $40, %esp
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %ecx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %eax
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %edx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movq {{.*#+}} xmm0 = mem[0],zero
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movq {{.*#+}} xmm0 = xmm0[0],zero
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    shll $3, %ecx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    xorps %xmm1, %xmm1
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movaps %xmm1, {{[0-9]+}}(%esp)
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movdqa %xmm0, (%esp)
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movl %ecx, %edx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    shrb $3, %dl
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    andb $12, %dl
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movzbl %dl, %edx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    shrxl %ecx, (%esp,%edx), %esi
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    notb %cl
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movl 4(%esp,%edx), %edx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    addl %edx, %edx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    shlxl %ecx, %edx, %ecx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    orl %esi, %ecx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movb %cl, (%eax)
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    addl $40, %esp
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    popl %esi
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    retl
   %init = load <8 x i8>, ptr %src, align 1
   %intermediate.sroa.0.0.vec.expand = shufflevector <8 x i8> %init, <8 x i8> poison, <16 x i32> <i32 0, i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef>
   %intermediate.sroa.0.0.vecblend = shufflevector <16 x i8> %intermediate.sroa.0.0.vec.expand, <16 x i8> <i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0>, <16 x i32> <i32 0, i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7, i32 24, i32 25, i32 26, i32 27, i32 28, i32 29, i32 30, i32 31>
   %byteOff.numbits = shl nuw nsw i64 %byteOff, 3
   %intermediate.val.frozen = freeze <16 x i8> %intermediate.sroa.0.0.vecblend
   %intermediate.val.frozen.bits = bitcast <16 x i8> %intermediate.val.frozen to i128
   %byteOff.numbits.wide = zext i64 %byteOff.numbits to i128
   %intermediate.val.frozen.bits.positioned = lshr i128 %intermediate.val.frozen.bits, %byteOff.numbits.wide
   %intermediate.val.frozen.bits.positioned.extracted = trunc i128 %intermediate.val.frozen.bits.positioned to i8
   %1 = insertelement <1 x i8> poison, i8 %intermediate.val.frozen.bits.positioned.extracted, i64 0
   store <1 x i8> %1, ptr %dst, align 1
   ret void
 }

 define void @load_2byte_chunk_of_16byte_alloca_with_zero_upper_half(ptr %src, i64 %byteOff, ptr %dst) nounwind {
 ; X64-NO-BMI2-NO-SHLD-LABEL: load_2byte_chunk_of_16byte_alloca_with_zero_upper_half:
 ; X64-NO-BMI2-NO-SHLD:       # %bb.0:
 ; X64-NO-BMI2-NO-SHLD-NEXT:    movq %rsi, %rcx
 ; X64-NO-BMI2-NO-SHLD-NEXT:    movq (%rdi), %rax
 ; X64-NO-BMI2-NO-SHLD-NEXT:    shll $3, %ecx
 ; X64-NO-BMI2-NO-SHLD-NEXT:    shrq %cl, %rax
 ; X64-NO-BMI2-NO-SHLD-NEXT:    xorl %esi, %esi
 ; X64-NO-BMI2-NO-SHLD-NEXT:    testb $64, %cl
 ; X64-NO-BMI2-NO-SHLD-NEXT:    cmoveq %rax, %rsi
 ; X64-NO-BMI2-NO-SHLD-NEXT:    movw %si, (%rdx)
 ; X64-NO-BMI2-NO-SHLD-NEXT:    retq
 ;
 ; X64-SHLD-LABEL: load_2byte_chunk_of_16byte_alloca_with_zero_upper_half:
 ; X64-SHLD:       # %bb.0:
 ; X64-SHLD-NEXT:    movq %rsi, %rcx
 ; X64-SHLD-NEXT:    movq (%rdi), %rax
 ; X64-SHLD-NEXT:    shll $3, %ecx
 ; X64-SHLD-NEXT:    xorl %esi, %esi
 ; X64-SHLD-NEXT:    shrdq %cl, %rsi, %rax
 ; X64-SHLD-NEXT:    testb $64, %cl
 ; X64-SHLD-NEXT:    cmovneq %rsi, %rax
 ; X64-SHLD-NEXT:    movw %ax, (%rdx)
 ; X64-SHLD-NEXT:    retq
 ;
 ; X64-HAVE-BMI2-NO-SHLD-LABEL: load_2byte_chunk_of_16byte_alloca_with_zero_upper_half:
 ; X64-HAVE-BMI2-NO-SHLD:       # %bb.0:
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    shll $3, %esi
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    shrxq %rsi, (%rdi), %rax
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    xorl %ecx, %ecx
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    testb $64, %sil
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    cmoveq %rax, %rcx
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    movw %cx, (%rdx)
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    retq
 ;
 ; X86-NO-BMI2-NO-SHLD-LABEL: load_2byte_chunk_of_16byte_alloca_with_zero_upper_half:
 ; X86-NO-BMI2-NO-SHLD:       # %bb.0:
 ; X86-NO-BMI2-NO-SHLD-NEXT:    pushl %esi
 ; X86-NO-BMI2-NO-SHLD-NEXT:    subl $40, %esp
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %ecx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %eax
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %edx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movq {{.*#+}} xmm0 = mem[0],zero
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movq {{.*#+}} xmm0 = xmm0[0],zero
 ; X86-NO-BMI2-NO-SHLD-NEXT:    shll $3, %ecx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    xorps %xmm1, %xmm1
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movaps %xmm1, {{[0-9]+}}(%esp)
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movdqa %xmm0, (%esp)
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl %ecx, %edx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    shrb $3, %dl
 ; X86-NO-BMI2-NO-SHLD-NEXT:    andb $12, %dl
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movzbl %dl, %edx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl (%esp,%edx), %esi
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl 4(%esp,%edx), %edx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    shrl %cl, %esi
 ; X86-NO-BMI2-NO-SHLD-NEXT:    notb %cl
 ; X86-NO-BMI2-NO-SHLD-NEXT:    addl %edx, %edx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    # kill: def $cl killed $cl killed $ecx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    shll %cl, %edx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    orl %esi, %edx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movw %dx, (%eax)
 ; X86-NO-BMI2-NO-SHLD-NEXT:    addl $40, %esp
 ; X86-NO-BMI2-NO-SHLD-NEXT:    popl %esi
 ; X86-NO-BMI2-NO-SHLD-NEXT:    retl
 ;
 ; X86-SHLD-LABEL: load_2byte_chunk_of_16byte_alloca_with_zero_upper_half:
 ; X86-SHLD:       # %bb.0:
 ; X86-SHLD-NEXT:    pushl %esi
 ; X86-SHLD-NEXT:    subl $40, %esp
 ; X86-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %ecx
 ; X86-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %eax
 ; X86-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %edx
 ; X86-SHLD-NEXT:    movq {{.*#+}} xmm0 = mem[0],zero
 ; X86-SHLD-NEXT:    movq {{.*#+}} xmm0 = xmm0[0],zero
 ; X86-SHLD-NEXT:    shll $3, %ecx
 ; X86-SHLD-NEXT:    xorps %xmm1, %xmm1
 ; X86-SHLD-NEXT:    movaps %xmm1, {{[0-9]+}}(%esp)
 ; X86-SHLD-NEXT:    movdqa %xmm0, (%esp)
 ; X86-SHLD-NEXT:    movl %ecx, %edx
 ; X86-SHLD-NEXT:    shrb $3, %dl
 ; X86-SHLD-NEXT:    andb $12, %dl
 ; X86-SHLD-NEXT:    movzbl %dl, %edx
 ; X86-SHLD-NEXT:    movl (%esp,%edx), %esi
 ; X86-SHLD-NEXT:    movl 4(%esp,%edx), %edx
 ; X86-SHLD-NEXT:    # kill: def $cl killed $cl killed $ecx
 ; X86-SHLD-NEXT:    shrdl %cl, %edx, %esi
 ; X86-SHLD-NEXT:    movw %si, (%eax)
 ; X86-SHLD-NEXT:    addl $40, %esp
 ; X86-SHLD-NEXT:    popl %esi
 ; X86-SHLD-NEXT:    retl
 ;
 ; X86-HAVE-BMI2-NO-SHLD-LABEL: load_2byte_chunk_of_16byte_alloca_with_zero_upper_half:
 ; X86-HAVE-BMI2-NO-SHLD:       # %bb.0:
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    pushl %esi
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    subl $40, %esp
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %ecx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %eax
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %edx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movq {{.*#+}} xmm0 = mem[0],zero
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movq {{.*#+}} xmm0 = xmm0[0],zero
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    shll $3, %ecx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    xorps %xmm1, %xmm1
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movaps %xmm1, {{[0-9]+}}(%esp)
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movdqa %xmm0, (%esp)
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movl %ecx, %edx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    shrb $3, %dl
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    andb $12, %dl
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movzbl %dl, %edx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    shrxl %ecx, (%esp,%edx), %esi
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    notb %cl
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movl 4(%esp,%edx), %edx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    addl %edx, %edx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    shlxl %ecx, %edx, %ecx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    orl %esi, %ecx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movw %cx, (%eax)
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    addl $40, %esp
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    popl %esi
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    retl
   %init = load <8 x i8>, ptr %src, align 1
   %intermediate.sroa.0.0.vec.expand = shufflevector <8 x i8> %init, <8 x i8> poison, <16 x i32> <i32 0, i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef>
   %intermediate.sroa.0.0.vecblend = shufflevector <16 x i8> %intermediate.sroa.0.0.vec.expand, <16 x i8> <i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0>, <16 x i32> <i32 0, i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7, i32 24, i32 25, i32 26, i32 27, i32 28, i32 29, i32 30, i32 31>
   %byteOff.numbits = shl nuw nsw i64 %byteOff, 3
   %intermediate.val.frozen = freeze <16 x i8> %intermediate.sroa.0.0.vecblend
   %intermediate.val.frozen.bits = bitcast <16 x i8> %intermediate.val.frozen to i128
   %byteOff.numbits.wide = zext i64 %byteOff.numbits to i128
   %intermediate.val.frozen.bits.positioned = lshr i128 %intermediate.val.frozen.bits, %byteOff.numbits.wide
   %intermediate.val.frozen.bits.positioned.extracted = trunc i128 %intermediate.val.frozen.bits.positioned to i16
   store i16 %intermediate.val.frozen.bits.positioned.extracted, ptr %dst, align 2
   ret void
 }

 define void @load_4byte_chunk_of_16byte_alloca_with_zero_upper_half(ptr %src, i64 %byteOff, ptr %dst) nounwind {
 ; X64-NO-BMI2-NO-SHLD-LABEL: load_4byte_chunk_of_16byte_alloca_with_zero_upper_half:
 ; X64-NO-BMI2-NO-SHLD:       # %bb.0:
 ; X64-NO-BMI2-NO-SHLD-NEXT:    movq %rsi, %rcx
 ; X64-NO-BMI2-NO-SHLD-NEXT:    movq (%rdi), %rax
 ; X64-NO-BMI2-NO-SHLD-NEXT:    shll $3, %ecx
 ; X64-NO-BMI2-NO-SHLD-NEXT:    shrq %cl, %rax
 ; X64-NO-BMI2-NO-SHLD-NEXT:    xorl %esi, %esi
 ; X64-NO-BMI2-NO-SHLD-NEXT:    testb $64, %cl
 ; X64-NO-BMI2-NO-SHLD-NEXT:    cmoveq %rax, %rsi
 ; X64-NO-BMI2-NO-SHLD-NEXT:    movl %esi, (%rdx)
 ; X64-NO-BMI2-NO-SHLD-NEXT:    retq
 ;
 ; X64-SHLD-LABEL: load_4byte_chunk_of_16byte_alloca_with_zero_upper_half:
 ; X64-SHLD:       # %bb.0:
 ; X64-SHLD-NEXT:    movq %rsi, %rcx
 ; X64-SHLD-NEXT:    movq (%rdi), %rax
 ; X64-SHLD-NEXT:    shll $3, %ecx
 ; X64-SHLD-NEXT:    xorl %esi, %esi
 ; X64-SHLD-NEXT:    shrdq %cl, %rsi, %rax
 ; X64-SHLD-NEXT:    testb $64, %cl
 ; X64-SHLD-NEXT:    cmovneq %rsi, %rax
 ; X64-SHLD-NEXT:    movl %eax, (%rdx)
 ; X64-SHLD-NEXT:    retq
 ;
 ; X64-HAVE-BMI2-NO-SHLD-LABEL: load_4byte_chunk_of_16byte_alloca_with_zero_upper_half:
 ; X64-HAVE-BMI2-NO-SHLD:       # %bb.0:
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    shll $3, %esi
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    shrxq %rsi, (%rdi), %rax
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    xorl %ecx, %ecx
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    testb $64, %sil
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    cmoveq %rax, %rcx
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    movl %ecx, (%rdx)
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    retq
 ;
 ; X86-NO-BMI2-NO-SHLD-LABEL: load_4byte_chunk_of_16byte_alloca_with_zero_upper_half:
 ; X86-NO-BMI2-NO-SHLD:       # %bb.0:
 ; X86-NO-BMI2-NO-SHLD-NEXT:    pushl %esi
 ; X86-NO-BMI2-NO-SHLD-NEXT:    subl $40, %esp
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %ecx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %eax
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %edx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movq {{.*#+}} xmm0 = mem[0],zero
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movq {{.*#+}} xmm0 = xmm0[0],zero
 ; X86-NO-BMI2-NO-SHLD-NEXT:    shll $3, %ecx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    xorps %xmm1, %xmm1
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movaps %xmm1, {{[0-9]+}}(%esp)
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movdqa %xmm0, (%esp)
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl %ecx, %edx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    shrb $3, %dl
 ; X86-NO-BMI2-NO-SHLD-NEXT:    andb $12, %dl
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movzbl %dl, %edx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl (%esp,%edx), %esi
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl 4(%esp,%edx), %edx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    shrl %cl, %esi
 ; X86-NO-BMI2-NO-SHLD-NEXT:    notb %cl
 ; X86-NO-BMI2-NO-SHLD-NEXT:    addl %edx, %edx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    # kill: def $cl killed $cl killed $ecx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    shll %cl, %edx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    orl %esi, %edx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl %edx, (%eax)
 ; X86-NO-BMI2-NO-SHLD-NEXT:    addl $40, %esp
 ; X86-NO-BMI2-NO-SHLD-NEXT:    popl %esi
 ; X86-NO-BMI2-NO-SHLD-NEXT:    retl
 ;
 ; X86-SHLD-LABEL: load_4byte_chunk_of_16byte_alloca_with_zero_upper_half:
 ; X86-SHLD:       # %bb.0:
 ; X86-SHLD-NEXT:    pushl %esi
 ; X86-SHLD-NEXT:    subl $40, %esp
 ; X86-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %ecx
 ; X86-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %eax
 ; X86-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %edx
 ; X86-SHLD-NEXT:    movq {{.*#+}} xmm0 = mem[0],zero
 ; X86-SHLD-NEXT:    movq {{.*#+}} xmm0 = xmm0[0],zero
 ; X86-SHLD-NEXT:    shll $3, %ecx
 ; X86-SHLD-NEXT:    xorps %xmm1, %xmm1
 ; X86-SHLD-NEXT:    movaps %xmm1, {{[0-9]+}}(%esp)
 ; X86-SHLD-NEXT:    movdqa %xmm0, (%esp)
 ; X86-SHLD-NEXT:    movl %ecx, %edx
 ; X86-SHLD-NEXT:    shrb $3, %dl
 ; X86-SHLD-NEXT:    andb $12, %dl
 ; X86-SHLD-NEXT:    movzbl %dl, %edx
 ; X86-SHLD-NEXT:    movl (%esp,%edx), %esi
 ; X86-SHLD-NEXT:    movl 4(%esp,%edx), %edx
 ; X86-SHLD-NEXT:    # kill: def $cl killed $cl killed $ecx
 ; X86-SHLD-NEXT:    shrdl %cl, %edx, %esi
 ; X86-SHLD-NEXT:    movl %esi, (%eax)
 ; X86-SHLD-NEXT:    addl $40, %esp
 ; X86-SHLD-NEXT:    popl %esi
 ; X86-SHLD-NEXT:    retl
 ;
 ; X86-HAVE-BMI2-NO-SHLD-LABEL: load_4byte_chunk_of_16byte_alloca_with_zero_upper_half:
 ; X86-HAVE-BMI2-NO-SHLD:       # %bb.0:
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    pushl %esi
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    subl $40, %esp
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %ecx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %eax
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %edx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movq {{.*#+}} xmm0 = mem[0],zero
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movq {{.*#+}} xmm0 = xmm0[0],zero
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    shll $3, %ecx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    xorps %xmm1, %xmm1
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movaps %xmm1, {{[0-9]+}}(%esp)
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movdqa %xmm0, (%esp)
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movl %ecx, %edx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    shrb $3, %dl
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    andb $12, %dl
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movzbl %dl, %edx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    shrxl %ecx, (%esp,%edx), %esi
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    notb %cl
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movl 4(%esp,%edx), %edx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    addl %edx, %edx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    shlxl %ecx, %edx, %ecx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    orl %esi, %ecx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movl %ecx, (%eax)
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    addl $40, %esp
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    popl %esi
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    retl
   %init = load <8 x i8>, ptr %src, align 1
   %intermediate.sroa.0.0.vec.expand = shufflevector <8 x i8> %init, <8 x i8> poison, <16 x i32> <i32 0, i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef>
   %intermediate.sroa.0.0.vecblend = shufflevector <16 x i8> %intermediate.sroa.0.0.vec.expand, <16 x i8> <i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0>, <16 x i32> <i32 0, i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7, i32 24, i32 25, i32 26, i32 27, i32 28, i32 29, i32 30, i32 31>
   %byteOff.numbits = shl nuw nsw i64 %byteOff, 3
   %intermediate.val.frozen = freeze <16 x i8> %intermediate.sroa.0.0.vecblend
   %intermediate.val.frozen.bits = bitcast <16 x i8> %intermediate.val.frozen to i128
   %byteOff.numbits.wide = zext i64 %byteOff.numbits to i128
   %intermediate.val.frozen.bits.positioned = lshr i128 %intermediate.val.frozen.bits, %byteOff.numbits.wide
   %intermediate.val.frozen.bits.positioned.extracted = trunc i128 %intermediate.val.frozen.bits.positioned to i32
   store i32 %intermediate.val.frozen.bits.positioned.extracted, ptr %dst, align 4
   ret void
 }

 define void @load_8byte_chunk_of_16byte_alloca_with_zero_upper_half(ptr %src, i64 %byteOff, ptr %dst) nounwind {
 ; X64-NO-BMI2-NO-SHLD-LABEL: load_8byte_chunk_of_16byte_alloca_with_zero_upper_half:
 ; X64-NO-BMI2-NO-SHLD:       # %bb.0:
 ; X64-NO-BMI2-NO-SHLD-NEXT:    movq %rsi, %rcx
 ; X64-NO-BMI2-NO-SHLD-NEXT:    movq (%rdi), %rax
 ; X64-NO-BMI2-NO-SHLD-NEXT:    shll $3, %ecx
 ; X64-NO-BMI2-NO-SHLD-NEXT:    shrq %cl, %rax
 ; X64-NO-BMI2-NO-SHLD-NEXT:    xorl %esi, %esi
 ; X64-NO-BMI2-NO-SHLD-NEXT:    testb $64, %cl
 ; X64-NO-BMI2-NO-SHLD-NEXT:    cmoveq %rax, %rsi
 ; X64-NO-BMI2-NO-SHLD-NEXT:    movq %rsi, (%rdx)
 ; X64-NO-BMI2-NO-SHLD-NEXT:    retq
 ;
 ; X64-SHLD-LABEL: load_8byte_chunk_of_16byte_alloca_with_zero_upper_half:
 ; X64-SHLD:       # %bb.0:
 ; X64-SHLD-NEXT:    movq %rsi, %rcx
 ; X64-SHLD-NEXT:    movq (%rdi), %rax
 ; X64-SHLD-NEXT:    shll $3, %ecx
 ; X64-SHLD-NEXT:    xorl %esi, %esi
 ; X64-SHLD-NEXT:    shrdq %cl, %rsi, %rax
 ; X64-SHLD-NEXT:    testb $64, %cl
 ; X64-SHLD-NEXT:    cmovneq %rsi, %rax
 ; X64-SHLD-NEXT:    movq %rax, (%rdx)
 ; X64-SHLD-NEXT:    retq
 ;
 ; X64-HAVE-BMI2-NO-SHLD-LABEL: load_8byte_chunk_of_16byte_alloca_with_zero_upper_half:
 ; X64-HAVE-BMI2-NO-SHLD:       # %bb.0:
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    shll $3, %esi
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    shrxq %rsi, (%rdi), %rax
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    xorl %ecx, %ecx
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    testb $64, %sil
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    cmoveq %rax, %rcx
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    movq %rcx, (%rdx)
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    retq
 ;
 ; X86-NO-BMI2-NO-SHLD-LABEL: load_8byte_chunk_of_16byte_alloca_with_zero_upper_half:
 ; X86-NO-BMI2-NO-SHLD:       # %bb.0:
 ; X86-NO-BMI2-NO-SHLD-NEXT:    pushl %ebp
 ; X86-NO-BMI2-NO-SHLD-NEXT:    pushl %ebx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    pushl %edi
 ; X86-NO-BMI2-NO-SHLD-NEXT:    pushl %esi
 ; X86-NO-BMI2-NO-SHLD-NEXT:    subl $44, %esp
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %eax
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %edx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %ecx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movq {{.*#+}} xmm0 = mem[0],zero
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movq {{.*#+}} xmm0 = xmm0[0],zero
 ; X86-NO-BMI2-NO-SHLD-NEXT:    shll $3, %eax
 ; X86-NO-BMI2-NO-SHLD-NEXT:    xorps %xmm1, %xmm1
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movaps %xmm1, {{[0-9]+}}(%esp)
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movdqa %xmm0, (%esp)
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl %eax, %ecx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    shrb $3, %cl
 ; X86-NO-BMI2-NO-SHLD-NEXT:    andb $12, %cl
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movzbl %cl, %ebx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl (%esp,%ebx), %ebp
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl 4(%esp,%ebx), %esi
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl %eax, %ecx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    shrl %cl, %ebp
 ; X86-NO-BMI2-NO-SHLD-NEXT:    notb %cl
 ; X86-NO-BMI2-NO-SHLD-NEXT:    leal (%esi,%esi), %edi
 ; X86-NO-BMI2-NO-SHLD-NEXT:    shll %cl, %edi
 ; X86-NO-BMI2-NO-SHLD-NEXT:    orl %ebp, %edi
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl %eax, %ecx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    shrl %cl, %esi
 ; X86-NO-BMI2-NO-SHLD-NEXT:    andb $24, %al
 ; X86-NO-BMI2-NO-SHLD-NEXT:    notb %al
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl 8(%esp,%ebx), %ebx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    addl %ebx, %ebx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl %eax, %ecx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    shll %cl, %ebx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    orl %esi, %ebx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl %ebx, 4(%edx)
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl %edi, (%edx)
 ; X86-NO-BMI2-NO-SHLD-NEXT:    addl $44, %esp
 ; X86-NO-BMI2-NO-SHLD-NEXT:    popl %esi
 ; X86-NO-BMI2-NO-SHLD-NEXT:    popl %edi
 ; X86-NO-BMI2-NO-SHLD-NEXT:    popl %ebx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    popl %ebp
 ; X86-NO-BMI2-NO-SHLD-NEXT:    retl
 ;
 ; X86-SHLD-LABEL: load_8byte_chunk_of_16byte_alloca_with_zero_upper_half:
 ; X86-SHLD:       # %bb.0:
 ; X86-SHLD-NEXT:    pushl %ebx
 ; X86-SHLD-NEXT:    pushl %edi
 ; X86-SHLD-NEXT:    pushl %esi
 ; X86-SHLD-NEXT:    subl $32, %esp
 ; X86-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %ecx
 ; X86-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %eax
 ; X86-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %edx
 ; X86-SHLD-NEXT:    movq {{.*#+}} xmm0 = mem[0],zero
 ; X86-SHLD-NEXT:    movq {{.*#+}} xmm0 = xmm0[0],zero
 ; X86-SHLD-NEXT:    shll $3, %ecx
 ; X86-SHLD-NEXT:    xorps %xmm1, %xmm1
 ; X86-SHLD-NEXT:    movaps %xmm1, {{[0-9]+}}(%esp)
 ; X86-SHLD-NEXT:    movdqa %xmm0, (%esp)
 ; X86-SHLD-NEXT:    movl %ecx, %edx
 ; X86-SHLD-NEXT:    shrb $3, %dl
 ; X86-SHLD-NEXT:    andb $12, %dl
 ; X86-SHLD-NEXT:    movzbl %dl, %edx
 ; X86-SHLD-NEXT:    movl 8(%esp,%edx), %esi
 ; X86-SHLD-NEXT:    movl (%esp,%edx), %edi
 ; X86-SHLD-NEXT:    movl 4(%esp,%edx), %edx
 ; X86-SHLD-NEXT:    movl %edx, %ebx
 ; X86-SHLD-NEXT:    shrdl %cl, %esi, %ebx
 ; X86-SHLD-NEXT:    # kill: def $cl killed $cl killed $ecx
 ; X86-SHLD-NEXT:    shrdl %cl, %edx, %edi
 ; X86-SHLD-NEXT:    movl %ebx, 4(%eax)
 ; X86-SHLD-NEXT:    movl %edi, (%eax)
 ; X86-SHLD-NEXT:    addl $32, %esp
 ; X86-SHLD-NEXT:    popl %esi
 ; X86-SHLD-NEXT:    popl %edi
 ; X86-SHLD-NEXT:    popl %ebx
 ; X86-SHLD-NEXT:    retl
 ;
 ; X86-HAVE-BMI2-NO-SHLD-LABEL: load_8byte_chunk_of_16byte_alloca_with_zero_upper_half:
 ; X86-HAVE-BMI2-NO-SHLD:       # %bb.0:
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    pushl %ebp
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    pushl %ebx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    pushl %edi
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    pushl %esi
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    subl $44, %esp
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %ecx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %eax
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %edx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movq {{.*#+}} xmm0 = mem[0],zero
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movq {{.*#+}} xmm0 = xmm0[0],zero
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    shll $3, %ecx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    xorps %xmm1, %xmm1
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movaps %xmm1, {{[0-9]+}}(%esp)
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movdqa %xmm0, (%esp)
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movl %ecx, %edx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    shrb $3, %dl
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    andb $12, %dl
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movzbl %dl, %edx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    shrxl %ecx, (%esp,%edx), %esi
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movl %ecx, %ebx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    notb %bl
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movl 4(%esp,%edx), %edi
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movl 8(%esp,%edx), %ebp
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    leal (%edi,%edi), %edx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    shlxl %ebx, %edx, %edx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    orl %esi, %edx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    shrxl %ecx, %edi, %esi
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    andb $24, %cl
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    notb %cl
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    addl %ebp, %ebp
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    shlxl %ecx, %ebp, %ecx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    orl %esi, %ecx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movl %ecx, 4(%eax)
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movl %edx, (%eax)
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    addl $44, %esp
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    popl %esi
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    popl %edi
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    popl %ebx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    popl %ebp
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    retl
   %init = load <8 x i8>, ptr %src, align 1
   %intermediate.sroa.0.0.vec.expand = shufflevector <8 x i8> %init, <8 x i8> poison, <16 x i32> <i32 0, i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef>
   %intermediate.sroa.0.0.vecblend = shufflevector <16 x i8> %intermediate.sroa.0.0.vec.expand, <16 x i8> <i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0>, <16 x i32> <i32 0, i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7, i32 24, i32 25, i32 26, i32 27, i32 28, i32 29, i32 30, i32 31>
   %byteOff.numbits = shl nuw nsw i64 %byteOff, 3
   %intermediate.val.frozen = freeze <16 x i8> %intermediate.sroa.0.0.vecblend
   %intermediate.val.frozen.bits = bitcast <16 x i8> %intermediate.val.frozen to i128
   %byteOff.numbits.wide = zext i64 %byteOff.numbits to i128
   %intermediate.val.frozen.bits.positioned = lshr i128 %intermediate.val.frozen.bits, %byteOff.numbits.wide
   %intermediate.val.frozen.bits.positioned.extracted = trunc i128 %intermediate.val.frozen.bits.positioned to i64
   store i64 %intermediate.val.frozen.bits.positioned.extracted, ptr %dst, align 8
   ret void
 }

 define void @load_1byte_chunk_of_32byte_alloca_with_zero_upper_half(ptr %src, i64 %byteOff, ptr %dst) nounwind {
 ; X64-NO-BMI2-LABEL: load_1byte_chunk_of_32byte_alloca_with_zero_upper_half:
 ; X64-NO-BMI2:       # %bb.0:
 ; X64-NO-BMI2-NEXT:    movups (%rdi), %xmm0
 ; X64-NO-BMI2-NEXT:    xorps %xmm1, %xmm1
 ; X64-NO-BMI2-NEXT:    leal (,%rsi,8), %ecx
 ; X64-NO-BMI2-NEXT:    movaps %xmm1, -{{[0-9]+}}(%rsp)
 ; X64-NO-BMI2-NEXT:    movaps %xmm1, -{{[0-9]+}}(%rsp)
 ; X64-NO-BMI2-NEXT:    movaps %xmm1, -{{[0-9]+}}(%rsp)
 ; X64-NO-BMI2-NEXT:    movaps %xmm0, -{{[0-9]+}}(%rsp)
 ; X64-NO-BMI2-NEXT:    movl %ecx, %eax
 ; X64-NO-BMI2-NEXT:    shrb $6, %al
 ; X64-NO-BMI2-NEXT:    movzbl %al, %eax
 ; X64-NO-BMI2-NEXT:    movq -72(%rsp,%rax,8), %rax
 ; X64-NO-BMI2-NEXT:    # kill: def $cl killed $cl killed $ecx
 ; X64-NO-BMI2-NEXT:    shrq %cl, %rax
 ; X64-NO-BMI2-NEXT:    movb %al, (%rdx)
 ; X64-NO-BMI2-NEXT:    retq
 ;
 ; X64-BMI2-LABEL: load_1byte_chunk_of_32byte_alloca_with_zero_upper_half:
 ; X64-BMI2:       # %bb.0:
 ; X64-BMI2-NEXT:    movups (%rdi), %xmm0
 ; X64-BMI2-NEXT:    xorps %xmm1, %xmm1
 ; X64-BMI2-NEXT:    shll $3, %esi
 ; X64-BMI2-NEXT:    movaps %xmm1, -{{[0-9]+}}(%rsp)
 ; X64-BMI2-NEXT:    movaps %xmm1, -{{[0-9]+}}(%rsp)
 ; X64-BMI2-NEXT:    movaps %xmm1, -{{[0-9]+}}(%rsp)
 ; X64-BMI2-NEXT:    movaps %xmm0, -{{[0-9]+}}(%rsp)
 ; X64-BMI2-NEXT:    movl %esi, %eax
 ; X64-BMI2-NEXT:    shrb $6, %al
 ; X64-BMI2-NEXT:    movzbl %al, %eax
 ; X64-BMI2-NEXT:    shrxq %rsi, -72(%rsp,%rax,8), %rax
 ; X64-BMI2-NEXT:    movb %al, (%rdx)
 ; X64-BMI2-NEXT:    retq
 ;
 ; X86-NO-BMI2-NO-SHLD-LABEL: load_1byte_chunk_of_32byte_alloca_with_zero_upper_half:
 ; X86-NO-BMI2-NO-SHLD:       # %bb.0:
 ; X86-NO-BMI2-NO-SHLD-NEXT:    pushl %esi
 ; X86-NO-BMI2-NO-SHLD-NEXT:    subl $72, %esp
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %ecx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %eax
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %edx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movups (%edx), %xmm0
 ; X86-NO-BMI2-NO-SHLD-NEXT:    xorps %xmm1, %xmm1
 ; X86-NO-BMI2-NO-SHLD-NEXT:    shll $3, %ecx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movaps %xmm1, {{[0-9]+}}(%esp)
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movaps %xmm1, {{[0-9]+}}(%esp)
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movaps %xmm1, {{[0-9]+}}(%esp)
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movaps %xmm0, (%esp)
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl %ecx, %edx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    shrb $5, %dl
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movzbl %dl, %edx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl (%esp,%edx,4), %esi
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl 4(%esp,%edx,4), %edx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    shrl %cl, %esi
 ; X86-NO-BMI2-NO-SHLD-NEXT:    notb %cl
 ; X86-NO-BMI2-NO-SHLD-NEXT:    addl %edx, %edx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    # kill: def $cl killed $cl killed $ecx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    shll %cl, %edx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    orl %esi, %edx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movb %dl, (%eax)
 ; X86-NO-BMI2-NO-SHLD-NEXT:    addl $72, %esp
 ; X86-NO-BMI2-NO-SHLD-NEXT:    popl %esi
 ; X86-NO-BMI2-NO-SHLD-NEXT:    retl
 ;
 ; X86-SHLD-LABEL: load_1byte_chunk_of_32byte_alloca_with_zero_upper_half:
 ; X86-SHLD:       # %bb.0:
 ; X86-SHLD-NEXT:    pushl %ebx
 ; X86-SHLD-NEXT:    subl $72, %esp
 ; X86-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %ecx
 ; X86-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %eax
 ; X86-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %edx
 ; X86-SHLD-NEXT:    movups (%edx), %xmm0
 ; X86-SHLD-NEXT:    xorps %xmm1, %xmm1
 ; X86-SHLD-NEXT:    shll $3, %ecx
 ; X86-SHLD-NEXT:    movaps %xmm1, {{[0-9]+}}(%esp)
 ; X86-SHLD-NEXT:    movaps %xmm1, {{[0-9]+}}(%esp)
 ; X86-SHLD-NEXT:    movaps %xmm1, {{[0-9]+}}(%esp)
 ; X86-SHLD-NEXT:    movaps %xmm0, (%esp)
 ; X86-SHLD-NEXT:    movl %ecx, %edx
 ; X86-SHLD-NEXT:    shrb $5, %dl
 ; X86-SHLD-NEXT:    movzbl %dl, %edx
 ; X86-SHLD-NEXT:    movl (%esp,%edx,4), %ebx
 ; X86-SHLD-NEXT:    movl 4(%esp,%edx,4), %edx
 ; X86-SHLD-NEXT:    # kill: def $cl killed $cl killed $ecx
 ; X86-SHLD-NEXT:    shrdl %cl, %edx, %ebx
 ; X86-SHLD-NEXT:    movb %bl, (%eax)
 ; X86-SHLD-NEXT:    addl $72, %esp
 ; X86-SHLD-NEXT:    popl %ebx
 ; X86-SHLD-NEXT:    retl
 ;
 ; X86-HAVE-BMI2-NO-SHLD-LABEL: load_1byte_chunk_of_32byte_alloca_with_zero_upper_half:
 ; X86-HAVE-BMI2-NO-SHLD:       # %bb.0:
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    pushl %esi
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    subl $72, %esp
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %ecx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %eax
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %edx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movups (%edx), %xmm0
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    xorps %xmm1, %xmm1
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    shll $3, %ecx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movaps %xmm1, {{[0-9]+}}(%esp)
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movaps %xmm1, {{[0-9]+}}(%esp)
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movaps %xmm1, {{[0-9]+}}(%esp)
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movaps %xmm0, (%esp)
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movl %ecx, %edx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    shrb $5, %dl
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movzbl %dl, %edx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    shrxl %ecx, (%esp,%edx,4), %esi
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    notb %cl
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movl 4(%esp,%edx,4), %edx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    addl %edx, %edx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    shlxl %ecx, %edx, %ecx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    orl %esi, %ecx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movb %cl, (%eax)
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    addl $72, %esp
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    popl %esi
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    retl
   %init = load <16 x i8>, ptr %src, align 1
   %intermediate.sroa.0.0.vec.expand = shufflevector <16 x i8> %init, <16 x i8> poison, <32 x i32> <i32 0, i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7, i32 8, i32 9, i32 10, i32 11, i32 12, i32 13, i32 14, i32 15, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef>
   %intermediate.sroa.0.0.vecblend = shufflevector <32 x i8> %intermediate.sroa.0.0.vec.expand, <32 x i8> <i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0>, <32 x i32> <i32 0, i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7, i32 8, i32 9, i32 10, i32 11, i32 12, i32 13, i32 14, i32 15, i32 48, i32 49, i32 50, i32 51, i32 52, i32 53, i32 54, i32 55, i32 56, i32 57, i32 58, i32 59, i32 60, i32 61, i32 62, i32 63>
   %byteOff.numbits = shl nuw nsw i64 %byteOff, 3
   %intermediate.val.frozen = freeze <32 x i8> %intermediate.sroa.0.0.vecblend
   %intermediate.val.frozen.bits = bitcast <32 x i8> %intermediate.val.frozen to i256
   %byteOff.numbits.wide = zext i64 %byteOff.numbits to i256
   %intermediate.val.frozen.bits.positioned = lshr i256 %intermediate.val.frozen.bits, %byteOff.numbits.wide
   %intermediate.val.frozen.bits.positioned.extracted = trunc i256 %intermediate.val.frozen.bits.positioned to i8
   %1 = insertelement <1 x i8> poison, i8 %intermediate.val.frozen.bits.positioned.extracted, i64 0
   store <1 x i8> %1, ptr %dst, align 1
   ret void
 }

 define void @load_2byte_chunk_of_32byte_alloca_with_zero_upper_half(ptr %src, i64 %byteOff, ptr %dst) nounwind {
 ; X64-NO-BMI2-LABEL: load_2byte_chunk_of_32byte_alloca_with_zero_upper_half:
 ; X64-NO-BMI2:       # %bb.0:
 ; X64-NO-BMI2-NEXT:    movups (%rdi), %xmm0
 ; X64-NO-BMI2-NEXT:    xorps %xmm1, %xmm1
 ; X64-NO-BMI2-NEXT:    leal (,%rsi,8), %ecx
 ; X64-NO-BMI2-NEXT:    movaps %xmm1, -{{[0-9]+}}(%rsp)
 ; X64-NO-BMI2-NEXT:    movaps %xmm1, -{{[0-9]+}}(%rsp)
 ; X64-NO-BMI2-NEXT:    movaps %xmm1, -{{[0-9]+}}(%rsp)
 ; X64-NO-BMI2-NEXT:    movaps %xmm0, -{{[0-9]+}}(%rsp)
 ; X64-NO-BMI2-NEXT:    movl %ecx, %eax
 ; X64-NO-BMI2-NEXT:    shrb $6, %al
 ; X64-NO-BMI2-NEXT:    movzbl %al, %eax
 ; X64-NO-BMI2-NEXT:    movq -72(%rsp,%rax,8), %rsi
 ; X64-NO-BMI2-NEXT:    shrq %cl, %rsi
 ; X64-NO-BMI2-NEXT:    movl -64(%rsp,%rax,8), %eax
 ; X64-NO-BMI2-NEXT:    addl %eax, %eax
 ; X64-NO-BMI2-NEXT:    andb $56, %cl
 ; X64-NO-BMI2-NEXT:    notb %cl
 ; X64-NO-BMI2-NEXT:    # kill: def $cl killed $cl killed $ecx
 ; X64-NO-BMI2-NEXT:    shlq %cl, %rax
 ; X64-NO-BMI2-NEXT:    orl %esi, %eax
 ; X64-NO-BMI2-NEXT:    movw %ax, (%rdx)
 ; X64-NO-BMI2-NEXT:    retq
 ;
 ; X64-BMI2-LABEL: load_2byte_chunk_of_32byte_alloca_with_zero_upper_half:
 ; X64-BMI2:       # %bb.0:
 ; X64-BMI2-NEXT:    movups (%rdi), %xmm0
 ; X64-BMI2-NEXT:    xorps %xmm1, %xmm1
 ; X64-BMI2-NEXT:    shll $3, %esi
 ; X64-BMI2-NEXT:    movaps %xmm1, -{{[0-9]+}}(%rsp)
 ; X64-BMI2-NEXT:    movaps %xmm1, -{{[0-9]+}}(%rsp)
 ; X64-BMI2-NEXT:    movaps %xmm1, -{{[0-9]+}}(%rsp)
 ; X64-BMI2-NEXT:    movaps %xmm0, -{{[0-9]+}}(%rsp)
 ; X64-BMI2-NEXT:    movl %esi, %eax
 ; X64-BMI2-NEXT:    shrb $6, %al
 ; X64-BMI2-NEXT:    movzbl %al, %eax
 ; X64-BMI2-NEXT:    shrxq %rsi, -72(%rsp,%rax,8), %rcx
 ; X64-BMI2-NEXT:    # kill: def $sil killed $sil killed $rsi def $rsi
 ; X64-BMI2-NEXT:    andb $56, %sil
 ; X64-BMI2-NEXT:    notb %sil
 ; X64-BMI2-NEXT:    movl -64(%rsp,%rax,8), %eax
 ; X64-BMI2-NEXT:    addl %eax, %eax
 ; X64-BMI2-NEXT:    shlxq %rsi, %rax, %rax
 ; X64-BMI2-NEXT:    orl %eax, %ecx
 ; X64-BMI2-NEXT:    movw %cx, (%rdx)
 ; X64-BMI2-NEXT:    retq
 ;
 ; X86-NO-BMI2-NO-SHLD-LABEL: load_2byte_chunk_of_32byte_alloca_with_zero_upper_half:
 ; X86-NO-BMI2-NO-SHLD:       # %bb.0:
 ; X86-NO-BMI2-NO-SHLD-NEXT:    pushl %esi
 ; X86-NO-BMI2-NO-SHLD-NEXT:    subl $72, %esp
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %ecx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %eax
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %edx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movups (%edx), %xmm0
 ; X86-NO-BMI2-NO-SHLD-NEXT:    xorps %xmm1, %xmm1
 ; X86-NO-BMI2-NO-SHLD-NEXT:    shll $3, %ecx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movaps %xmm1, {{[0-9]+}}(%esp)
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movaps %xmm1, {{[0-9]+}}(%esp)
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movaps %xmm1, {{[0-9]+}}(%esp)
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movaps %xmm0, (%esp)
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl %ecx, %edx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    shrb $5, %dl
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movzbl %dl, %edx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl (%esp,%edx,4), %esi
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl 4(%esp,%edx,4), %edx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    shrl %cl, %esi
 ; X86-NO-BMI2-NO-SHLD-NEXT:    notb %cl
 ; X86-NO-BMI2-NO-SHLD-NEXT:    addl %edx, %edx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    # kill: def $cl killed $cl killed $ecx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    shll %cl, %edx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    orl %esi, %edx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movw %dx, (%eax)
 ; X86-NO-BMI2-NO-SHLD-NEXT:    addl $72, %esp
 ; X86-NO-BMI2-NO-SHLD-NEXT:    popl %esi
 ; X86-NO-BMI2-NO-SHLD-NEXT:    retl
 ;
 ; X86-SHLD-LABEL: load_2byte_chunk_of_32byte_alloca_with_zero_upper_half:
 ; X86-SHLD:       # %bb.0:
 ; X86-SHLD-NEXT:    pushl %esi
 ; X86-SHLD-NEXT:    subl $72, %esp
 ; X86-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %ecx
 ; X86-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %eax
 ; X86-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %edx
 ; X86-SHLD-NEXT:    movups (%edx), %xmm0
 ; X86-SHLD-NEXT:    xorps %xmm1, %xmm1
 ; X86-SHLD-NEXT:    shll $3, %ecx
 ; X86-SHLD-NEXT:    movaps %xmm1, {{[0-9]+}}(%esp)
 ; X86-SHLD-NEXT:    movaps %xmm1, {{[0-9]+}}(%esp)
 ; X86-SHLD-NEXT:    movaps %xmm1, {{[0-9]+}}(%esp)
 ; X86-SHLD-NEXT:    movaps %xmm0, (%esp)
 ; X86-SHLD-NEXT:    movl %ecx, %edx
 ; X86-SHLD-NEXT:    shrb $5, %dl
 ; X86-SHLD-NEXT:    movzbl %dl, %edx
 ; X86-SHLD-NEXT:    movl (%esp,%edx,4), %esi
 ; X86-SHLD-NEXT:    movl 4(%esp,%edx,4), %edx
 ; X86-SHLD-NEXT:    # kill: def $cl killed $cl killed $ecx
 ; X86-SHLD-NEXT:    shrdl %cl, %edx, %esi
 ; X86-SHLD-NEXT:    movw %si, (%eax)
 ; X86-SHLD-NEXT:    addl $72, %esp
 ; X86-SHLD-NEXT:    popl %esi
 ; X86-SHLD-NEXT:    retl
 ;
 ; X86-HAVE-BMI2-NO-SHLD-LABEL: load_2byte_chunk_of_32byte_alloca_with_zero_upper_half:
 ; X86-HAVE-BMI2-NO-SHLD:       # %bb.0:
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    pushl %esi
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    subl $72, %esp
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %ecx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %eax
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %edx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movups (%edx), %xmm0
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    xorps %xmm1, %xmm1
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    shll $3, %ecx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movaps %xmm1, {{[0-9]+}}(%esp)
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movaps %xmm1, {{[0-9]+}}(%esp)
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movaps %xmm1, {{[0-9]+}}(%esp)
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movaps %xmm0, (%esp)
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movl %ecx, %edx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    shrb $5, %dl
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movzbl %dl, %edx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    shrxl %ecx, (%esp,%edx,4), %esi
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    notb %cl
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movl 4(%esp,%edx,4), %edx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    addl %edx, %edx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    shlxl %ecx, %edx, %ecx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    orl %esi, %ecx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movw %cx, (%eax)
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    addl $72, %esp
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    popl %esi
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    retl
   %init = load <16 x i8>, ptr %src, align 1
   %intermediate.sroa.0.0.vec.expand = shufflevector <16 x i8> %init, <16 x i8> poison, <32 x i32> <i32 0, i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7, i32 8, i32 9, i32 10, i32 11, i32 12, i32 13, i32 14, i32 15, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef>
   %intermediate.sroa.0.0.vecblend = shufflevector <32 x i8> %intermediate.sroa.0.0.vec.expand, <32 x i8> <i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0>, <32 x i32> <i32 0, i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7, i32 8, i32 9, i32 10, i32 11, i32 12, i32 13, i32 14, i32 15, i32 48, i32 49, i32 50, i32 51, i32 52, i32 53, i32 54, i32 55, i32 56, i32 57, i32 58, i32 59, i32 60, i32 61, i32 62, i32 63>
   %byteOff.numbits = shl nuw nsw i64 %byteOff, 3
   %intermediate.val.frozen = freeze <32 x i8> %intermediate.sroa.0.0.vecblend
   %intermediate.val.frozen.bits = bitcast <32 x i8> %intermediate.val.frozen to i256
   %byteOff.numbits.wide = zext i64 %byteOff.numbits to i256
   %intermediate.val.frozen.bits.positioned = lshr i256 %intermediate.val.frozen.bits, %byteOff.numbits.wide
   %intermediate.val.frozen.bits.positioned.extracted = trunc i256 %intermediate.val.frozen.bits.positioned to i16
   store i16 %intermediate.val.frozen.bits.positioned.extracted, ptr %dst, align 2
   ret void
 }

 define void @load_4byte_chunk_of_32byte_alloca_with_zero_upper_half(ptr %src, i64 %byteOff, ptr %dst) nounwind {
 ; X64-NO-BMI2-LABEL: load_4byte_chunk_of_32byte_alloca_with_zero_upper_half:
 ; X64-NO-BMI2:       # %bb.0:
 ; X64-NO-BMI2-NEXT:    movups (%rdi), %xmm0
 ; X64-NO-BMI2-NEXT:    xorps %xmm1, %xmm1
 ; X64-NO-BMI2-NEXT:    leal (,%rsi,8), %ecx
 ; X64-NO-BMI2-NEXT:    movaps %xmm1, -{{[0-9]+}}(%rsp)
 ; X64-NO-BMI2-NEXT:    movaps %xmm1, -{{[0-9]+}}(%rsp)
 ; X64-NO-BMI2-NEXT:    movaps %xmm1, -{{[0-9]+}}(%rsp)
 ; X64-NO-BMI2-NEXT:    movaps %xmm0, -{{[0-9]+}}(%rsp)
 ; X64-NO-BMI2-NEXT:    movl %ecx, %eax
 ; X64-NO-BMI2-NEXT:    shrb $6, %al
 ; X64-NO-BMI2-NEXT:    movzbl %al, %eax
 ; X64-NO-BMI2-NEXT:    movq -72(%rsp,%rax,8), %rsi
 ; X64-NO-BMI2-NEXT:    shrq %cl, %rsi
 ; X64-NO-BMI2-NEXT:    movl -64(%rsp,%rax,8), %eax
 ; X64-NO-BMI2-NEXT:    addl %eax, %eax
 ; X64-NO-BMI2-NEXT:    andb $56, %cl
 ; X64-NO-BMI2-NEXT:    notb %cl
 ; X64-NO-BMI2-NEXT:    # kill: def $cl killed $cl killed $ecx
 ; X64-NO-BMI2-NEXT:    shlq %cl, %rax
 ; X64-NO-BMI2-NEXT:    orl %esi, %eax
 ; X64-NO-BMI2-NEXT:    movl %eax, (%rdx)
 ; X64-NO-BMI2-NEXT:    retq
 ;
 ; X64-BMI2-LABEL: load_4byte_chunk_of_32byte_alloca_with_zero_upper_half:
 ; X64-BMI2:       # %bb.0:
 ; X64-BMI2-NEXT:    movups (%rdi), %xmm0
 ; X64-BMI2-NEXT:    xorps %xmm1, %xmm1
 ; X64-BMI2-NEXT:    shll $3, %esi
 ; X64-BMI2-NEXT:    movaps %xmm1, -{{[0-9]+}}(%rsp)
 ; X64-BMI2-NEXT:    movaps %xmm1, -{{[0-9]+}}(%rsp)
 ; X64-BMI2-NEXT:    movaps %xmm1, -{{[0-9]+}}(%rsp)
 ; X64-BMI2-NEXT:    movaps %xmm0, -{{[0-9]+}}(%rsp)
 ; X64-BMI2-NEXT:    movl %esi, %eax
 ; X64-BMI2-NEXT:    shrb $6, %al
 ; X64-BMI2-NEXT:    movzbl %al, %eax
 ; X64-BMI2-NEXT:    shrxq %rsi, -72(%rsp,%rax,8), %rcx
 ; X64-BMI2-NEXT:    # kill: def $sil killed $sil killed $rsi def $rsi
 ; X64-BMI2-NEXT:    andb $56, %sil
 ; X64-BMI2-NEXT:    notb %sil
 ; X64-BMI2-NEXT:    movl -64(%rsp,%rax,8), %eax
 ; X64-BMI2-NEXT:    addl %eax, %eax
 ; X64-BMI2-NEXT:    shlxq %rsi, %rax, %rax
 ; X64-BMI2-NEXT:    orl %eax, %ecx
 ; X64-BMI2-NEXT:    movl %ecx, (%rdx)
 ; X64-BMI2-NEXT:    retq
 ;
 ; X86-NO-BMI2-NO-SHLD-LABEL: load_4byte_chunk_of_32byte_alloca_with_zero_upper_half:
 ; X86-NO-BMI2-NO-SHLD:       # %bb.0:
 ; X86-NO-BMI2-NO-SHLD-NEXT:    pushl %esi
 ; X86-NO-BMI2-NO-SHLD-NEXT:    subl $72, %esp
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %ecx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %eax
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %edx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movups (%edx), %xmm0
 ; X86-NO-BMI2-NO-SHLD-NEXT:    xorps %xmm1, %xmm1
 ; X86-NO-BMI2-NO-SHLD-NEXT:    shll $3, %ecx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movaps %xmm1, {{[0-9]+}}(%esp)
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movaps %xmm1, {{[0-9]+}}(%esp)
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movaps %xmm1, {{[0-9]+}}(%esp)
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movaps %xmm0, (%esp)
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl %ecx, %edx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    shrb $5, %dl
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movzbl %dl, %edx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl (%esp,%edx,4), %esi
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl 4(%esp,%edx,4), %edx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    shrl %cl, %esi
 ; X86-NO-BMI2-NO-SHLD-NEXT:    notb %cl
 ; X86-NO-BMI2-NO-SHLD-NEXT:    addl %edx, %edx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    # kill: def $cl killed $cl killed $ecx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    shll %cl, %edx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    orl %esi, %edx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl %edx, (%eax)
 ; X86-NO-BMI2-NO-SHLD-NEXT:    addl $72, %esp
 ; X86-NO-BMI2-NO-SHLD-NEXT:    popl %esi
 ; X86-NO-BMI2-NO-SHLD-NEXT:    retl
 ;
 ; X86-SHLD-LABEL: load_4byte_chunk_of_32byte_alloca_with_zero_upper_half:
 ; X86-SHLD:       # %bb.0:
 ; X86-SHLD-NEXT:    pushl %esi
 ; X86-SHLD-NEXT:    subl $72, %esp
 ; X86-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %ecx
 ; X86-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %eax
 ; X86-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %edx
 ; X86-SHLD-NEXT:    movups (%edx), %xmm0
 ; X86-SHLD-NEXT:    xorps %xmm1, %xmm1
 ; X86-SHLD-NEXT:    shll $3, %ecx
 ; X86-SHLD-NEXT:    movaps %xmm1, {{[0-9]+}}(%esp)
 ; X86-SHLD-NEXT:    movaps %xmm1, {{[0-9]+}}(%esp)
 ; X86-SHLD-NEXT:    movaps %xmm1, {{[0-9]+}}(%esp)
 ; X86-SHLD-NEXT:    movaps %xmm0, (%esp)
 ; X86-SHLD-NEXT:    movl %ecx, %edx
 ; X86-SHLD-NEXT:    shrb $5, %dl
 ; X86-SHLD-NEXT:    movzbl %dl, %edx
 ; X86-SHLD-NEXT:    movl (%esp,%edx,4), %esi
 ; X86-SHLD-NEXT:    movl 4(%esp,%edx,4), %edx
 ; X86-SHLD-NEXT:    # kill: def $cl killed $cl killed $ecx
 ; X86-SHLD-NEXT:    shrdl %cl, %edx, %esi
 ; X86-SHLD-NEXT:    movl %esi, (%eax)
 ; X86-SHLD-NEXT:    addl $72, %esp
 ; X86-SHLD-NEXT:    popl %esi
 ; X86-SHLD-NEXT:    retl
 ;
 ; X86-HAVE-BMI2-NO-SHLD-LABEL: load_4byte_chunk_of_32byte_alloca_with_zero_upper_half:
 ; X86-HAVE-BMI2-NO-SHLD:       # %bb.0:
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    pushl %esi
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    subl $72, %esp
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %ecx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %eax
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %edx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movups (%edx), %xmm0
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    xorps %xmm1, %xmm1
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    shll $3, %ecx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movaps %xmm1, {{[0-9]+}}(%esp)
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movaps %xmm1, {{[0-9]+}}(%esp)
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movaps %xmm1, {{[0-9]+}}(%esp)
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movaps %xmm0, (%esp)
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movl %ecx, %edx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    shrb $5, %dl
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movzbl %dl, %edx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    shrxl %ecx, (%esp,%edx,4), %esi
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    notb %cl
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movl 4(%esp,%edx,4), %edx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    addl %edx, %edx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    shlxl %ecx, %edx, %ecx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    orl %esi, %ecx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movl %ecx, (%eax)
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    addl $72, %esp
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    popl %esi
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    retl
   %init = load <16 x i8>, ptr %src, align 1
   %intermediate.sroa.0.0.vec.expand = shufflevector <16 x i8> %init, <16 x i8> poison, <32 x i32> <i32 0, i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7, i32 8, i32 9, i32 10, i32 11, i32 12, i32 13, i32 14, i32 15, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef>
   %intermediate.sroa.0.0.vecblend = shufflevector <32 x i8> %intermediate.sroa.0.0.vec.expand, <32 x i8> <i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0>, <32 x i32> <i32 0, i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7, i32 8, i32 9, i32 10, i32 11, i32 12, i32 13, i32 14, i32 15, i32 48, i32 49, i32 50, i32 51, i32 52, i32 53, i32 54, i32 55, i32 56, i32 57, i32 58, i32 59, i32 60, i32 61, i32 62, i32 63>
   %byteOff.numbits = shl nuw nsw i64 %byteOff, 3
   %intermediate.val.frozen = freeze <32 x i8> %intermediate.sroa.0.0.vecblend
   %intermediate.val.frozen.bits = bitcast <32 x i8> %intermediate.val.frozen to i256
   %byteOff.numbits.wide = zext i64 %byteOff.numbits to i256
   %intermediate.val.frozen.bits.positioned = lshr i256 %intermediate.val.frozen.bits, %byteOff.numbits.wide
   %intermediate.val.frozen.bits.positioned.extracted = trunc i256 %intermediate.val.frozen.bits.positioned to i32
   store i32 %intermediate.val.frozen.bits.positioned.extracted, ptr %dst, align 4
   ret void
 }

 define void @load_8byte_chunk_of_32byte_alloca_with_zero_upper_half(ptr %src, i64 %byteOff, ptr %dst) nounwind {
 ; X64-NO-BMI2-NO-SHLD-LABEL: load_8byte_chunk_of_32byte_alloca_with_zero_upper_half:
 ; X64-NO-BMI2-NO-SHLD:       # %bb.0:
 ; X64-NO-BMI2-NO-SHLD-NEXT:    movups (%rdi), %xmm0
 ; X64-NO-BMI2-NO-SHLD-NEXT:    xorps %xmm1, %xmm1
 ; X64-NO-BMI2-NO-SHLD-NEXT:    leal (,%rsi,8), %ecx
 ; X64-NO-BMI2-NO-SHLD-NEXT:    movaps %xmm1, -{{[0-9]+}}(%rsp)
 ; X64-NO-BMI2-NO-SHLD-NEXT:    movaps %xmm1, -{{[0-9]+}}(%rsp)
 ; X64-NO-BMI2-NO-SHLD-NEXT:    movaps %xmm1, -{{[0-9]+}}(%rsp)
 ; X64-NO-BMI2-NO-SHLD-NEXT:    movaps %xmm0, -{{[0-9]+}}(%rsp)
 ; X64-NO-BMI2-NO-SHLD-NEXT:    movl %ecx, %eax
 ; X64-NO-BMI2-NO-SHLD-NEXT:    shrb $6, %al
 ; X64-NO-BMI2-NO-SHLD-NEXT:    movzbl %al, %eax
 ; X64-NO-BMI2-NO-SHLD-NEXT:    movq -72(%rsp,%rax,8), %rsi
 ; X64-NO-BMI2-NO-SHLD-NEXT:    movq -64(%rsp,%rax,8), %rax
 ; X64-NO-BMI2-NO-SHLD-NEXT:    shrq %cl, %rsi
 ; X64-NO-BMI2-NO-SHLD-NEXT:    notb %cl
 ; X64-NO-BMI2-NO-SHLD-NEXT:    addq %rax, %rax
 ; X64-NO-BMI2-NO-SHLD-NEXT:    # kill: def $cl killed $cl killed $ecx
 ; X64-NO-BMI2-NO-SHLD-NEXT:    shlq %cl, %rax
 ; X64-NO-BMI2-NO-SHLD-NEXT:    orq %rsi, %rax
 ; X64-NO-BMI2-NO-SHLD-NEXT:    movq %rax, (%rdx)
 ; X64-NO-BMI2-NO-SHLD-NEXT:    retq
 ;
 ; X64-SHLD-LABEL: load_8byte_chunk_of_32byte_alloca_with_zero_upper_half:
 ; X64-SHLD:       # %bb.0:
 ; X64-SHLD-NEXT:    movups (%rdi), %xmm0
 ; X64-SHLD-NEXT:    xorps %xmm1, %xmm1
 ; X64-SHLD-NEXT:    leal (,%rsi,8), %ecx
 ; X64-SHLD-NEXT:    movaps %xmm1, -{{[0-9]+}}(%rsp)
 ; X64-SHLD-NEXT:    movaps %xmm1, -{{[0-9]+}}(%rsp)
 ; X64-SHLD-NEXT:    movaps %xmm1, -{{[0-9]+}}(%rsp)
 ; X64-SHLD-NEXT:    movaps %xmm0, -{{[0-9]+}}(%rsp)
 ; X64-SHLD-NEXT:    movl %ecx, %eax
 ; X64-SHLD-NEXT:    shrb $6, %al
 ; X64-SHLD-NEXT:    movzbl %al, %eax
 ; X64-SHLD-NEXT:    movq -72(%rsp,%rax,8), %rsi
 ; X64-SHLD-NEXT:    movq -64(%rsp,%rax,8), %rax
 ; X64-SHLD-NEXT:    # kill: def $cl killed $cl killed $ecx
 ; X64-SHLD-NEXT:    shrdq %cl, %rax, %rsi
 ; X64-SHLD-NEXT:    movq %rsi, (%rdx)
 ; X64-SHLD-NEXT:    retq
 ;
 ; X64-HAVE-BMI2-NO-SHLD-LABEL: load_8byte_chunk_of_32byte_alloca_with_zero_upper_half:
 ; X64-HAVE-BMI2-NO-SHLD:       # %bb.0:
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    movups (%rdi), %xmm0
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    xorps %xmm1, %xmm1
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    shll $3, %esi
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    movaps %xmm1, -{{[0-9]+}}(%rsp)
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    movaps %xmm1, -{{[0-9]+}}(%rsp)
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    movaps %xmm1, -{{[0-9]+}}(%rsp)
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    movaps %xmm0, -{{[0-9]+}}(%rsp)
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    movl %esi, %eax
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    shrb $6, %al
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    movzbl %al, %eax
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    shrxq %rsi, -72(%rsp,%rax,8), %rcx
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    notb %sil
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    movq -64(%rsp,%rax,8), %rax
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    addq %rax, %rax
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    shlxq %rsi, %rax, %rax
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    orq %rcx, %rax
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    movq %rax, (%rdx)
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    retq
 ;
 ; X86-NO-BMI2-NO-SHLD-LABEL: load_8byte_chunk_of_32byte_alloca_with_zero_upper_half:
 ; X86-NO-BMI2-NO-SHLD:       # %bb.0:
 ; X86-NO-BMI2-NO-SHLD-NEXT:    pushl %ebp
 ; X86-NO-BMI2-NO-SHLD-NEXT:    pushl %ebx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    pushl %edi
 ; X86-NO-BMI2-NO-SHLD-NEXT:    pushl %esi
 ; X86-NO-BMI2-NO-SHLD-NEXT:    subl $76, %esp
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %eax
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %edx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %ecx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movups (%ecx), %xmm0
 ; X86-NO-BMI2-NO-SHLD-NEXT:    xorps %xmm1, %xmm1
 ; X86-NO-BMI2-NO-SHLD-NEXT:    shll $3, %eax
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movaps %xmm1, {{[0-9]+}}(%esp)
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movaps %xmm1, {{[0-9]+}}(%esp)
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movaps %xmm1, {{[0-9]+}}(%esp)
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movaps %xmm0, (%esp)
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl %eax, %ecx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    shrb $5, %cl
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movzbl %cl, %ebx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl (%esp,%ebx,4), %ebp
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl 4(%esp,%ebx,4), %esi
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl %eax, %ecx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    shrl %cl, %ebp
 ; X86-NO-BMI2-NO-SHLD-NEXT:    notb %cl
 ; X86-NO-BMI2-NO-SHLD-NEXT:    leal (%esi,%esi), %edi
 ; X86-NO-BMI2-NO-SHLD-NEXT:    shll %cl, %edi
 ; X86-NO-BMI2-NO-SHLD-NEXT:    orl %ebp, %edi
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl %eax, %ecx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    shrl %cl, %esi
 ; X86-NO-BMI2-NO-SHLD-NEXT:    andb $24, %al
 ; X86-NO-BMI2-NO-SHLD-NEXT:    notb %al
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl 8(%esp,%ebx,4), %ebx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    addl %ebx, %ebx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl %eax, %ecx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    shll %cl, %ebx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    orl %esi, %ebx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl %ebx, 4(%edx)
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl %edi, (%edx)
 ; X86-NO-BMI2-NO-SHLD-NEXT:    addl $76, %esp
 ; X86-NO-BMI2-NO-SHLD-NEXT:    popl %esi
 ; X86-NO-BMI2-NO-SHLD-NEXT:    popl %edi
 ; X86-NO-BMI2-NO-SHLD-NEXT:    popl %ebx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    popl %ebp
 ; X86-NO-BMI2-NO-SHLD-NEXT:    retl
 ;
 ; X86-SHLD-LABEL: load_8byte_chunk_of_32byte_alloca_with_zero_upper_half:
 ; X86-SHLD:       # %bb.0:
 ; X86-SHLD-NEXT:    pushl %ebx
 ; X86-SHLD-NEXT:    pushl %edi
 ; X86-SHLD-NEXT:    pushl %esi
 ; X86-SHLD-NEXT:    subl $64, %esp
 ; X86-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %ecx
 ; X86-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %eax
 ; X86-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %edx
 ; X86-SHLD-NEXT:    movups (%edx), %xmm0
 ; X86-SHLD-NEXT:    xorps %xmm1, %xmm1
 ; X86-SHLD-NEXT:    shll $3, %ecx
 ; X86-SHLD-NEXT:    movaps %xmm1, {{[0-9]+}}(%esp)
 ; X86-SHLD-NEXT:    movaps %xmm1, {{[0-9]+}}(%esp)
 ; X86-SHLD-NEXT:    movaps %xmm1, {{[0-9]+}}(%esp)
 ; X86-SHLD-NEXT:    movaps %xmm0, (%esp)
 ; X86-SHLD-NEXT:    movl %ecx, %edx
 ; X86-SHLD-NEXT:    shrb $5, %dl
 ; X86-SHLD-NEXT:    movzbl %dl, %edx
 ; X86-SHLD-NEXT:    movl 8(%esp,%edx,4), %esi
 ; X86-SHLD-NEXT:    movl (%esp,%edx,4), %edi
 ; X86-SHLD-NEXT:    movl 4(%esp,%edx,4), %edx
 ; X86-SHLD-NEXT:    movl %edx, %ebx
 ; X86-SHLD-NEXT:    shrdl %cl, %esi, %ebx
 ; X86-SHLD-NEXT:    # kill: def $cl killed $cl killed $ecx
 ; X86-SHLD-NEXT:    shrdl %cl, %edx, %edi
 ; X86-SHLD-NEXT:    movl %ebx, 4(%eax)
 ; X86-SHLD-NEXT:    movl %edi, (%eax)
 ; X86-SHLD-NEXT:    addl $64, %esp
 ; X86-SHLD-NEXT:    popl %esi
 ; X86-SHLD-NEXT:    popl %edi
 ; X86-SHLD-NEXT:    popl %ebx
 ; X86-SHLD-NEXT:    retl
 ;
 ; X86-HAVE-BMI2-NO-SHLD-LABEL: load_8byte_chunk_of_32byte_alloca_with_zero_upper_half:
 ; X86-HAVE-BMI2-NO-SHLD:       # %bb.0:
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    pushl %ebp
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    pushl %ebx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    pushl %edi
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    pushl %esi
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    subl $76, %esp
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %ecx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %eax
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %edx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movups (%edx), %xmm0
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    xorps %xmm1, %xmm1
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    shll $3, %ecx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movaps %xmm1, {{[0-9]+}}(%esp)
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movaps %xmm1, {{[0-9]+}}(%esp)
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movaps %xmm1, {{[0-9]+}}(%esp)
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movaps %xmm0, (%esp)
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movl %ecx, %edx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    shrb $5, %dl
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movzbl %dl, %edx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    shrxl %ecx, (%esp,%edx,4), %esi
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movl %ecx, %ebx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    notb %bl
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movl 4(%esp,%edx,4), %edi
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movl 8(%esp,%edx,4), %ebp
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    leal (%edi,%edi), %edx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    shlxl %ebx, %edx, %edx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    orl %esi, %edx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    shrxl %ecx, %edi, %esi
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    andb $24, %cl
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    notb %cl
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    addl %ebp, %ebp
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    shlxl %ecx, %ebp, %ecx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    orl %esi, %ecx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movl %ecx, 4(%eax)
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movl %edx, (%eax)
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    addl $76, %esp
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    popl %esi
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    popl %edi
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    popl %ebx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    popl %ebp
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    retl
   %init = load <16 x i8>, ptr %src, align 1
   %intermediate.sroa.0.0.vec.expand = shufflevector <16 x i8> %init, <16 x i8> poison, <32 x i32> <i32 0, i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7, i32 8, i32 9, i32 10, i32 11, i32 12, i32 13, i32 14, i32 15, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef>
   %intermediate.sroa.0.0.vecblend = shufflevector <32 x i8> %intermediate.sroa.0.0.vec.expand, <32 x i8> <i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0>, <32 x i32> <i32 0, i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7, i32 8, i32 9, i32 10, i32 11, i32 12, i32 13, i32 14, i32 15, i32 48, i32 49, i32 50, i32 51, i32 52, i32 53, i32 54, i32 55, i32 56, i32 57, i32 58, i32 59, i32 60, i32 61, i32 62, i32 63>
   %byteOff.numbits = shl nuw nsw i64 %byteOff, 3
   %intermediate.val.frozen = freeze <32 x i8> %intermediate.sroa.0.0.vecblend
   %intermediate.val.frozen.bits = bitcast <32 x i8> %intermediate.val.frozen to i256
   %byteOff.numbits.wide = zext i64 %byteOff.numbits to i256
   %intermediate.val.frozen.bits.positioned = lshr i256 %intermediate.val.frozen.bits, %byteOff.numbits.wide
   %intermediate.val.frozen.bits.positioned.extracted = trunc i256 %intermediate.val.frozen.bits.positioned to i64
   store i64 %intermediate.val.frozen.bits.positioned.extracted, ptr %dst, align 8
   ret void
 }

 define void @load_16byte_chunk_of_32byte_alloca_with_zero_upper_half(ptr %src, i64 %byteOff, ptr %dst) nounwind {
 ; X64-NO-BMI2-NO-SHLD-LABEL: load_16byte_chunk_of_32byte_alloca_with_zero_upper_half:
 ; X64-NO-BMI2-NO-SHLD:       # %bb.0:
 ; X64-NO-BMI2-NO-SHLD-NEXT:    movups (%rdi), %xmm0
 ; X64-NO-BMI2-NO-SHLD-NEXT:    xorps %xmm1, %xmm1
 ; X64-NO-BMI2-NO-SHLD-NEXT:    leal (,%rsi,8), %eax
 ; X64-NO-BMI2-NO-SHLD-NEXT:    movaps %xmm1, -{{[0-9]+}}(%rsp)
 ; X64-NO-BMI2-NO-SHLD-NEXT:    movaps %xmm1, -{{[0-9]+}}(%rsp)
 ; X64-NO-BMI2-NO-SHLD-NEXT:    movaps %xmm1, -{{[0-9]+}}(%rsp)
 ; X64-NO-BMI2-NO-SHLD-NEXT:    movaps %xmm0, -{{[0-9]+}}(%rsp)
 ; X64-NO-BMI2-NO-SHLD-NEXT:    movl %eax, %ecx
 ; X64-NO-BMI2-NO-SHLD-NEXT:    shrb $6, %cl
 ; X64-NO-BMI2-NO-SHLD-NEXT:    movzbl %cl, %edi
 ; X64-NO-BMI2-NO-SHLD-NEXT:    movq -72(%rsp,%rdi,8), %r8
 ; X64-NO-BMI2-NO-SHLD-NEXT:    movq -64(%rsp,%rdi,8), %r9
 ; X64-NO-BMI2-NO-SHLD-NEXT:    movl %eax, %ecx
 ; X64-NO-BMI2-NO-SHLD-NEXT:    shrq %cl, %r8
 ; X64-NO-BMI2-NO-SHLD-NEXT:    movl %eax, %esi
 ; X64-NO-BMI2-NO-SHLD-NEXT:    notb %sil
 ; X64-NO-BMI2-NO-SHLD-NEXT:    leaq (%r9,%r9), %r10
 ; X64-NO-BMI2-NO-SHLD-NEXT:    movl %esi, %ecx
 ; X64-NO-BMI2-NO-SHLD-NEXT:    shlq %cl, %r10
 ; X64-NO-BMI2-NO-SHLD-NEXT:    orq %r8, %r10
 ; X64-NO-BMI2-NO-SHLD-NEXT:    movl %eax, %ecx
 ; X64-NO-BMI2-NO-SHLD-NEXT:    shrq %cl, %r9
 ; X64-NO-BMI2-NO-SHLD-NEXT:    movq -56(%rsp,%rdi,8), %rax
 ; X64-NO-BMI2-NO-SHLD-NEXT:    addq %rax, %rax
 ; X64-NO-BMI2-NO-SHLD-NEXT:    movl %esi, %ecx
 ; X64-NO-BMI2-NO-SHLD-NEXT:    shlq %cl, %rax
 ; X64-NO-BMI2-NO-SHLD-NEXT:    orq %r9, %rax
 ; X64-NO-BMI2-NO-SHLD-NEXT:    movq %rax, 8(%rdx)
 ; X64-NO-BMI2-NO-SHLD-NEXT:    movq %r10, (%rdx)
 ; X64-NO-BMI2-NO-SHLD-NEXT:    retq
 ;
 ; X64-NO-BMI2-HAVE-SHLD-LABEL: load_16byte_chunk_of_32byte_alloca_with_zero_upper_half:
 ; X64-NO-BMI2-HAVE-SHLD:       # %bb.0:
 ; X64-NO-BMI2-HAVE-SHLD-NEXT:    movups (%rdi), %xmm0
 ; X64-NO-BMI2-HAVE-SHLD-NEXT:    xorps %xmm1, %xmm1
 ; X64-NO-BMI2-HAVE-SHLD-NEXT:    leal (,%rsi,8), %eax
 ; X64-NO-BMI2-HAVE-SHLD-NEXT:    movaps %xmm1, -{{[0-9]+}}(%rsp)
 ; X64-NO-BMI2-HAVE-SHLD-NEXT:    movaps %xmm1, -{{[0-9]+}}(%rsp)
 ; X64-NO-BMI2-HAVE-SHLD-NEXT:    movaps %xmm1, -{{[0-9]+}}(%rsp)
 ; X64-NO-BMI2-HAVE-SHLD-NEXT:    movaps %xmm0, -{{[0-9]+}}(%rsp)
 ; X64-NO-BMI2-HAVE-SHLD-NEXT:    movl %eax, %ecx
 ; X64-NO-BMI2-HAVE-SHLD-NEXT:    shrb $6, %cl
 ; X64-NO-BMI2-HAVE-SHLD-NEXT:    movzbl %cl, %esi
 ; X64-NO-BMI2-HAVE-SHLD-NEXT:    movq -72(%rsp,%rsi,8), %rdi
 ; X64-NO-BMI2-HAVE-SHLD-NEXT:    movq -64(%rsp,%rsi,8), %r8
 ; X64-NO-BMI2-HAVE-SHLD-NEXT:    movq %r8, %r9
 ; X64-NO-BMI2-HAVE-SHLD-NEXT:    movl %eax, %ecx
 ; X64-NO-BMI2-HAVE-SHLD-NEXT:    shrq %cl, %r9
 ; X64-NO-BMI2-HAVE-SHLD-NEXT:    notb %cl
 ; X64-NO-BMI2-HAVE-SHLD-NEXT:    movq -56(%rsp,%rsi,8), %rsi
 ; X64-NO-BMI2-HAVE-SHLD-NEXT:    addq %rsi, %rsi
 ; X64-NO-BMI2-HAVE-SHLD-NEXT:    shlq %cl, %rsi
 ; X64-NO-BMI2-HAVE-SHLD-NEXT:    orq %r9, %rsi
 ; X64-NO-BMI2-HAVE-SHLD-NEXT:    movl %eax, %ecx
 ; X64-NO-BMI2-HAVE-SHLD-NEXT:    shrdq %cl, %r8, %rdi
 ; X64-NO-BMI2-HAVE-SHLD-NEXT:    movq %rdi, (%rdx)
 ; X64-NO-BMI2-HAVE-SHLD-NEXT:    movq %rsi, 8(%rdx)
 ; X64-NO-BMI2-HAVE-SHLD-NEXT:    retq
 ;
 ; X64-HAVE-BMI2-NO-SHLD-LABEL: load_16byte_chunk_of_32byte_alloca_with_zero_upper_half:
 ; X64-HAVE-BMI2-NO-SHLD:       # %bb.0:
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    movups (%rdi), %xmm0
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    xorps %xmm1, %xmm1
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    shll $3, %esi
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    movaps %xmm1, -{{[0-9]+}}(%rsp)
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    movaps %xmm1, -{{[0-9]+}}(%rsp)
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    movaps %xmm1, -{{[0-9]+}}(%rsp)
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    movaps %xmm0, -{{[0-9]+}}(%rsp)
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    movl %esi, %eax
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    shrb $6, %al
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    movzbl %al, %eax
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    shrxq %rsi, -72(%rsp,%rax,8), %rcx
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    movq -64(%rsp,%rax,8), %rdi
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    shrxq %rsi, %rdi, %r8
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    # kill: def $sil killed $sil killed $rsi def $rsi
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    notb %sil
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    movq -56(%rsp,%rax,8), %rax
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    addq %rdi, %rdi
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    shlxq %rsi, %rdi, %rdi
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    orq %rcx, %rdi
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    addq %rax, %rax
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    shlxq %rsi, %rax, %rax
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    orq %r8, %rax
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    movq %rax, 8(%rdx)
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    movq %rdi, (%rdx)
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    retq
 ;
 ; X64-HAVE-BMI2-HAVE-SHLD-LABEL: load_16byte_chunk_of_32byte_alloca_with_zero_upper_half:
 ; X64-HAVE-BMI2-HAVE-SHLD:       # %bb.0:
 ; X64-HAVE-BMI2-HAVE-SHLD-NEXT:    movups (%rdi), %xmm0
 ; X64-HAVE-BMI2-HAVE-SHLD-NEXT:    xorps %xmm1, %xmm1
 ; X64-HAVE-BMI2-HAVE-SHLD-NEXT:    leal (,%rsi,8), %ecx
 ; X64-HAVE-BMI2-HAVE-SHLD-NEXT:    movaps %xmm1, -{{[0-9]+}}(%rsp)
 ; X64-HAVE-BMI2-HAVE-SHLD-NEXT:    movaps %xmm1, -{{[0-9]+}}(%rsp)
 ; X64-HAVE-BMI2-HAVE-SHLD-NEXT:    movaps %xmm1, -{{[0-9]+}}(%rsp)
 ; X64-HAVE-BMI2-HAVE-SHLD-NEXT:    movaps %xmm0, -{{[0-9]+}}(%rsp)
 ; X64-HAVE-BMI2-HAVE-SHLD-NEXT:    movl %ecx, %eax
 ; X64-HAVE-BMI2-HAVE-SHLD-NEXT:    shrb $6, %al
 ; X64-HAVE-BMI2-HAVE-SHLD-NEXT:    movzbl %al, %eax
 ; X64-HAVE-BMI2-HAVE-SHLD-NEXT:    movq -72(%rsp,%rax,8), %rsi
 ; X64-HAVE-BMI2-HAVE-SHLD-NEXT:    movq -64(%rsp,%rax,8), %rdi
 ; X64-HAVE-BMI2-HAVE-SHLD-NEXT:    shrxq %rcx, %rdi, %r8
 ; X64-HAVE-BMI2-HAVE-SHLD-NEXT:    movl %ecx, %r9d
 ; X64-HAVE-BMI2-HAVE-SHLD-NEXT:    notb %r9b
 ; X64-HAVE-BMI2-HAVE-SHLD-NEXT:    movq -56(%rsp,%rax,8), %rax
 ; X64-HAVE-BMI2-HAVE-SHLD-NEXT:    addq %rax, %rax
 ; X64-HAVE-BMI2-HAVE-SHLD-NEXT:    shlxq %r9, %rax, %rax
 ; X64-HAVE-BMI2-HAVE-SHLD-NEXT:    orq %r8, %rax
 ; X64-HAVE-BMI2-HAVE-SHLD-NEXT:    # kill: def $cl killed $cl killed $rcx
 ; X64-HAVE-BMI2-HAVE-SHLD-NEXT:    shrdq %cl, %rdi, %rsi
 ; X64-HAVE-BMI2-HAVE-SHLD-NEXT:    movq %rsi, (%rdx)
 ; X64-HAVE-BMI2-HAVE-SHLD-NEXT:    movq %rax, 8(%rdx)
 ; X64-HAVE-BMI2-HAVE-SHLD-NEXT:    retq
 ;
 ; X86-NO-BMI2-NO-SHLD-LABEL: load_16byte_chunk_of_32byte_alloca_with_zero_upper_half:
 ; X86-NO-BMI2-NO-SHLD:       # %bb.0:
 ; X86-NO-BMI2-NO-SHLD-NEXT:    pushl %ebp
 ; X86-NO-BMI2-NO-SHLD-NEXT:    pushl %ebx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    pushl %edi
 ; X86-NO-BMI2-NO-SHLD-NEXT:    pushl %esi
 ; X86-NO-BMI2-NO-SHLD-NEXT:    subl $92, %esp
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %eax
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %ecx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movups (%ecx), %xmm0
 ; X86-NO-BMI2-NO-SHLD-NEXT:    xorps %xmm1, %xmm1
 ; X86-NO-BMI2-NO-SHLD-NEXT:    shll $3, %eax
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movaps %xmm1, {{[0-9]+}}(%esp)
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movaps %xmm1, {{[0-9]+}}(%esp)
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movaps %xmm1, {{[0-9]+}}(%esp)
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movaps %xmm0, {{[0-9]+}}(%esp)
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl %eax, %ecx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    shrb $5, %cl
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movzbl %cl, %edi
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl 16(%esp,%edi,4), %edx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl 20(%esp,%edi,4), %ebp
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl %eax, %ecx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    shrl %cl, %edx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    notb %cl
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movb %cl, {{[-0-9]+}}(%e{{[sb]}}p) # 1-byte Spill
 ; X86-NO-BMI2-NO-SHLD-NEXT:    leal (%ebp,%ebp), %esi
 ; X86-NO-BMI2-NO-SHLD-NEXT:    shll %cl, %esi
 ; X86-NO-BMI2-NO-SHLD-NEXT:    orl %edx, %esi
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl %esi, {{[-0-9]+}}(%e{{[sb]}}p) # 4-byte Spill
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl %eax, %ecx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    shrl %cl, %ebp
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movb %al, %ch
 ; X86-NO-BMI2-NO-SHLD-NEXT:    andb $24, %ch
 ; X86-NO-BMI2-NO-SHLD-NEXT:    xorb $31, %ch
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl 24(%esp,%edi,4), %edx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    leal (%edx,%edx), %ebx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movb %ch, %cl
 ; X86-NO-BMI2-NO-SHLD-NEXT:    shll %cl, %ebx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    orl %ebp, %ebx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movb %al, %cl
 ; X86-NO-BMI2-NO-SHLD-NEXT:    shrl %cl, %edx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl 28(%esp,%edi,4), %esi
 ; X86-NO-BMI2-NO-SHLD-NEXT:    leal (%esi,%esi), %ebp
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movb {{[-0-9]+}}(%e{{[sb]}}p), %cl # 1-byte Reload
 ; X86-NO-BMI2-NO-SHLD-NEXT:    shll %cl, %ebp
 ; X86-NO-BMI2-NO-SHLD-NEXT:    orl %edx, %ebp
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movb %al, %cl
 ; X86-NO-BMI2-NO-SHLD-NEXT:    shrl %cl, %esi
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl 32(%esp,%edi,4), %eax
 ; X86-NO-BMI2-NO-SHLD-NEXT:    addl %eax, %eax
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movb %ch, %cl
 ; X86-NO-BMI2-NO-SHLD-NEXT:    shll %cl, %eax
 ; X86-NO-BMI2-NO-SHLD-NEXT:    orl %esi, %eax
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %ecx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl %eax, 12(%ecx)
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl %ebp, 8(%ecx)
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl %ebx, 4(%ecx)
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl {{[-0-9]+}}(%e{{[sb]}}p), %eax # 4-byte Reload
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl %eax, (%ecx)
 ; X86-NO-BMI2-NO-SHLD-NEXT:    addl $92, %esp
 ; X86-NO-BMI2-NO-SHLD-NEXT:    popl %esi
 ; X86-NO-BMI2-NO-SHLD-NEXT:    popl %edi
 ; X86-NO-BMI2-NO-SHLD-NEXT:    popl %ebx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    popl %ebp
 ; X86-NO-BMI2-NO-SHLD-NEXT:    retl
 ;
 ; X86-SHLD-LABEL: load_16byte_chunk_of_32byte_alloca_with_zero_upper_half:
 ; X86-SHLD:       # %bb.0:
 ; X86-SHLD-NEXT:    pushl %ebp
 ; X86-SHLD-NEXT:    pushl %ebx
 ; X86-SHLD-NEXT:    pushl %edi
 ; X86-SHLD-NEXT:    pushl %esi
 ; X86-SHLD-NEXT:    subl $92, %esp
 ; X86-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %ecx
 ; X86-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %eax
 ; X86-SHLD-NEXT:    movups (%eax), %xmm0
 ; X86-SHLD-NEXT:    xorps %xmm1, %xmm1
 ; X86-SHLD-NEXT:    shll $3, %ecx
 ; X86-SHLD-NEXT:    movaps %xmm1, {{[0-9]+}}(%esp)
 ; X86-SHLD-NEXT:    movaps %xmm1, {{[0-9]+}}(%esp)
 ; X86-SHLD-NEXT:    movaps %xmm1, {{[0-9]+}}(%esp)
 ; X86-SHLD-NEXT:    movaps %xmm0, {{[0-9]+}}(%esp)
 ; X86-SHLD-NEXT:    movl %ecx, %eax
 ; X86-SHLD-NEXT:    shrb $5, %al
 ; X86-SHLD-NEXT:    movzbl %al, %ebx
 ; X86-SHLD-NEXT:    movl 24(%esp,%ebx,4), %esi
 ; X86-SHLD-NEXT:    movl 16(%esp,%ebx,4), %eax
 ; X86-SHLD-NEXT:    movl 20(%esp,%ebx,4), %edi
 ; X86-SHLD-NEXT:    movl %edi, {{[-0-9]+}}(%e{{[sb]}}p) # 4-byte Spill
 ; X86-SHLD-NEXT:    shrdl %cl, %esi, %edi
 ; X86-SHLD-NEXT:    movl 28(%esp,%ebx,4), %ebp
 ; X86-SHLD-NEXT:    shrdl %cl, %ebp, %esi
 ; X86-SHLD-NEXT:    movl 32(%esp,%ebx,4), %ebx
 ; X86-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %edx
 ; X86-SHLD-NEXT:    shrdl %cl, %ebx, %ebp
 ; X86-SHLD-NEXT:    movl %ebp, 12(%edx)
 ; X86-SHLD-NEXT:    movl %esi, 8(%edx)
 ; X86-SHLD-NEXT:    movl %edi, 4(%edx)
 ; X86-SHLD-NEXT:    # kill: def $cl killed $cl killed $ecx
 ; X86-SHLD-NEXT:    movl {{[-0-9]+}}(%e{{[sb]}}p), %esi # 4-byte Reload
 ; X86-SHLD-NEXT:    shrdl %cl, %esi, %eax
 ; X86-SHLD-NEXT:    movl %eax, (%edx)
 ; X86-SHLD-NEXT:    addl $92, %esp
 ; X86-SHLD-NEXT:    popl %esi
 ; X86-SHLD-NEXT:    popl %edi
 ; X86-SHLD-NEXT:    popl %ebx
 ; X86-SHLD-NEXT:    popl %ebp
 ; X86-SHLD-NEXT:    retl
 ;
 ; X86-HAVE-BMI2-NO-SHLD-LABEL: load_16byte_chunk_of_32byte_alloca_with_zero_upper_half:
 ; X86-HAVE-BMI2-NO-SHLD:       # %bb.0:
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    pushl %ebp
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    pushl %ebx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    pushl %edi
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    pushl %esi
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    subl $92, %esp
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %eax
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %ecx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movups (%ecx), %xmm0
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    xorps %xmm1, %xmm1
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    shll $3, %eax
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movaps %xmm1, {{[0-9]+}}(%esp)
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movaps %xmm1, {{[0-9]+}}(%esp)
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movaps %xmm1, {{[0-9]+}}(%esp)
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movaps %xmm0, {{[0-9]+}}(%esp)
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movl %eax, %ecx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    shrb $5, %cl
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movzbl %cl, %ecx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    shrxl %eax, 16(%esp,%ecx,4), %edi
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movl 20(%esp,%ecx,4), %esi
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    shrxl %eax, %esi, %edx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movl %edx, {{[-0-9]+}}(%e{{[sb]}}p) # 4-byte Spill
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movl %eax, %ebx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movl %eax, %edx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    notb %dl
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    addl %esi, %esi
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    shlxl %edx, %esi, %ebp
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    orl %edi, %ebp
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movl 24(%esp,%ecx,4), %esi
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    andb $24, %bl
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    xorb $31, %bl
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    leal (%esi,%esi), %edi
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    shlxl %ebx, %edi, %edi
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    orl {{[-0-9]+}}(%e{{[sb]}}p), %edi # 4-byte Folded Reload
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    shrxl %eax, %esi, %esi
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movl %esi, {{[-0-9]+}}(%e{{[sb]}}p) # 4-byte Spill
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movl 28(%esp,%ecx,4), %esi
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    shrxl %eax, %esi, %eax
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    addl %esi, %esi
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    shlxl %edx, %esi, %edx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    orl {{[-0-9]+}}(%e{{[sb]}}p), %edx # 4-byte Folded Reload
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movl 32(%esp,%ecx,4), %ecx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    addl %ecx, %ecx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    shlxl %ebx, %ecx, %ecx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    orl %eax, %ecx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %eax
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movl %ecx, 12(%eax)
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movl %edx, 8(%eax)
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movl %edi, 4(%eax)
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movl %ebp, (%eax)
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    addl $92, %esp
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    popl %esi
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    popl %edi
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    popl %ebx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    popl %ebp
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    retl
   %init = load <16 x i8>, ptr %src, align 1
   %intermediate.sroa.0.0.vec.expand = shufflevector <16 x i8> %init, <16 x i8> poison, <32 x i32> <i32 0, i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7, i32 8, i32 9, i32 10, i32 11, i32 12, i32 13, i32 14, i32 15, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef>
   %intermediate.sroa.0.0.vecblend = shufflevector <32 x i8> %intermediate.sroa.0.0.vec.expand, <32 x i8> <i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0>, <32 x i32> <i32 0, i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7, i32 8, i32 9, i32 10, i32 11, i32 12, i32 13, i32 14, i32 15, i32 48, i32 49, i32 50, i32 51, i32 52, i32 53, i32 54, i32 55, i32 56, i32 57, i32 58, i32 59, i32 60, i32 61, i32 62, i32 63>
   %byteOff.numbits = shl nuw nsw i64 %byteOff, 3
   %intermediate.val.frozen = freeze <32 x i8> %intermediate.sroa.0.0.vecblend
   %intermediate.val.frozen.bits = bitcast <32 x i8> %intermediate.val.frozen to i256
   %byteOff.numbits.wide = zext i64 %byteOff.numbits to i256
   %intermediate.val.frozen.bits.positioned = lshr i256 %intermediate.val.frozen.bits, %byteOff.numbits.wide
   %intermediate.val.frozen.bits.positioned.extracted = trunc i256 %intermediate.val.frozen.bits.positioned to i128
   store i128 %intermediate.val.frozen.bits.positioned.extracted, ptr %dst, align 16
   ret void
 }

 define void @load_1byte_chunk_of_64byte_alloca_with_zero_upper_half(ptr %src, i64 %byteOff, ptr %dst) nounwind {
 ; X64-NO-BMI2-LABEL: load_1byte_chunk_of_64byte_alloca_with_zero_upper_half:
 ; X64-NO-BMI2:       # %bb.0:
 ; X64-NO-BMI2-NEXT:    pushq %rax
 ; X64-NO-BMI2-NEXT:    movups (%rdi), %xmm0
 ; X64-NO-BMI2-NEXT:    movups 16(%rdi), %xmm1
 ; X64-NO-BMI2-NEXT:    xorps %xmm2, %xmm2
 ; X64-NO-BMI2-NEXT:    movaps %xmm2, -{{[0-9]+}}(%rsp)
 ; X64-NO-BMI2-NEXT:    movaps %xmm2, -{{[0-9]+}}(%rsp)
 ; X64-NO-BMI2-NEXT:    movaps %xmm2, -{{[0-9]+}}(%rsp)
 ; X64-NO-BMI2-NEXT:    movaps %xmm2, -{{[0-9]+}}(%rsp)
 ; X64-NO-BMI2-NEXT:    movaps %xmm2, -{{[0-9]+}}(%rsp)
 ; X64-NO-BMI2-NEXT:    movaps %xmm2, -{{[0-9]+}}(%rsp)
 ; X64-NO-BMI2-NEXT:    movaps %xmm1, -{{[0-9]+}}(%rsp)
 ; X64-NO-BMI2-NEXT:    movaps %xmm0, -{{[0-9]+}}(%rsp)
 ; X64-NO-BMI2-NEXT:    leal (,%rsi,8), %ecx
 ; X64-NO-BMI2-NEXT:    andl $56, %ecx
 ; X64-NO-BMI2-NEXT:    andl $56, %esi
 ; X64-NO-BMI2-NEXT:    movq -128(%rsp,%rsi), %rax
 ; X64-NO-BMI2-NEXT:    shrq %cl, %rax
 ; X64-NO-BMI2-NEXT:    movl -120(%rsp,%rsi), %esi
 ; X64-NO-BMI2-NEXT:    addl %esi, %esi
 ; X64-NO-BMI2-NEXT:    notl %ecx
 ; X64-NO-BMI2-NEXT:    # kill: def $cl killed $cl killed $ecx
 ; X64-NO-BMI2-NEXT:    shlq %cl, %rsi
 ; X64-NO-BMI2-NEXT:    orl %eax, %esi
 ; X64-NO-BMI2-NEXT:    movb %sil, (%rdx)
 ; X64-NO-BMI2-NEXT:    popq %rax
 ; X64-NO-BMI2-NEXT:    retq
 ;
 ; X64-BMI2-LABEL: load_1byte_chunk_of_64byte_alloca_with_zero_upper_half:
 ; X64-BMI2:       # %bb.0:
 ; X64-BMI2-NEXT:    pushq %rax
 ; X64-BMI2-NEXT:    movups (%rdi), %xmm0
 ; X64-BMI2-NEXT:    movups 16(%rdi), %xmm1
 ; X64-BMI2-NEXT:    xorps %xmm2, %xmm2
 ; X64-BMI2-NEXT:    movaps %xmm2, -{{[0-9]+}}(%rsp)
 ; X64-BMI2-NEXT:    movaps %xmm2, -{{[0-9]+}}(%rsp)
 ; X64-BMI2-NEXT:    movaps %xmm2, -{{[0-9]+}}(%rsp)
 ; X64-BMI2-NEXT:    movaps %xmm2, -{{[0-9]+}}(%rsp)
 ; X64-BMI2-NEXT:    movaps %xmm2, -{{[0-9]+}}(%rsp)
 ; X64-BMI2-NEXT:    movaps %xmm2, -{{[0-9]+}}(%rsp)
 ; X64-BMI2-NEXT:    movaps %xmm1, -{{[0-9]+}}(%rsp)
 ; X64-BMI2-NEXT:    movaps %xmm0, -{{[0-9]+}}(%rsp)
 ; X64-BMI2-NEXT:    leal (,%rsi,8), %eax
 ; X64-BMI2-NEXT:    andl $56, %eax
 ; X64-BMI2-NEXT:    andl $56, %esi
 ; X64-BMI2-NEXT:    shrxq %rax, -128(%rsp,%rsi), %rcx
 ; X64-BMI2-NEXT:    # kill: def $eax killed $eax killed $rax def $rax
 ; X64-BMI2-NEXT:    notl %eax
 ; X64-BMI2-NEXT:    movl -120(%rsp,%rsi), %esi
 ; X64-BMI2-NEXT:    addl %esi, %esi
 ; X64-BMI2-NEXT:    shlxq %rax, %rsi, %rax
 ; X64-BMI2-NEXT:    orl %eax, %ecx
 ; X64-BMI2-NEXT:    movb %cl, (%rdx)
 ; X64-BMI2-NEXT:    popq %rax
 ; X64-BMI2-NEXT:    retq
 ;
 ; X86-NO-BMI2-NO-SHLD-LABEL: load_1byte_chunk_of_64byte_alloca_with_zero_upper_half:
 ; X86-NO-BMI2-NO-SHLD:       # %bb.0:
 ; X86-NO-BMI2-NO-SHLD-NEXT:    pushl %esi
 ; X86-NO-BMI2-NO-SHLD-NEXT:    subl $136, %esp
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %edx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %eax
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %ecx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movups (%ecx), %xmm0
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movups 16(%ecx), %xmm1
 ; X86-NO-BMI2-NO-SHLD-NEXT:    xorps %xmm2, %xmm2
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movaps %xmm2, {{[0-9]+}}(%esp)
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movaps %xmm2, {{[0-9]+}}(%esp)
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movaps %xmm2, {{[0-9]+}}(%esp)
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movaps %xmm2, {{[0-9]+}}(%esp)
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movaps %xmm2, {{[0-9]+}}(%esp)
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movaps %xmm2, {{[0-9]+}}(%esp)
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movaps %xmm1, {{[0-9]+}}(%esp)
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movaps %xmm0, (%esp)
 ; X86-NO-BMI2-NO-SHLD-NEXT:    leal (,%edx,8), %ecx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    andl $60, %edx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl (%esp,%edx), %esi
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl 4(%esp,%edx), %edx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    shrl %cl, %esi
 ; X86-NO-BMI2-NO-SHLD-NEXT:    notb %cl
 ; X86-NO-BMI2-NO-SHLD-NEXT:    addl %edx, %edx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    # kill: def $cl killed $cl killed $ecx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    shll %cl, %edx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    orl %esi, %edx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movb %dl, (%eax)
 ; X86-NO-BMI2-NO-SHLD-NEXT:    addl $136, %esp
 ; X86-NO-BMI2-NO-SHLD-NEXT:    popl %esi
 ; X86-NO-BMI2-NO-SHLD-NEXT:    retl
 ;
 ; X86-SHLD-LABEL: load_1byte_chunk_of_64byte_alloca_with_zero_upper_half:
 ; X86-SHLD:       # %bb.0:
 ; X86-SHLD-NEXT:    pushl %ebx
 ; X86-SHLD-NEXT:    subl $136, %esp
 ; X86-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %edx
 ; X86-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %eax
 ; X86-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %ecx
 ; X86-SHLD-NEXT:    movups (%ecx), %xmm0
 ; X86-SHLD-NEXT:    movups 16(%ecx), %xmm1
 ; X86-SHLD-NEXT:    xorps %xmm2, %xmm2
 ; X86-SHLD-NEXT:    movaps %xmm2, {{[0-9]+}}(%esp)
 ; X86-SHLD-NEXT:    movaps %xmm2, {{[0-9]+}}(%esp)
 ; X86-SHLD-NEXT:    movaps %xmm2, {{[0-9]+}}(%esp)
 ; X86-SHLD-NEXT:    movaps %xmm2, {{[0-9]+}}(%esp)
 ; X86-SHLD-NEXT:    movaps %xmm2, {{[0-9]+}}(%esp)
 ; X86-SHLD-NEXT:    movaps %xmm2, {{[0-9]+}}(%esp)
 ; X86-SHLD-NEXT:    movaps %xmm1, {{[0-9]+}}(%esp)
 ; X86-SHLD-NEXT:    movaps %xmm0, (%esp)
 ; X86-SHLD-NEXT:    leal (,%edx,8), %ecx
 ; X86-SHLD-NEXT:    andl $60, %edx
 ; X86-SHLD-NEXT:    movl (%esp,%edx), %ebx
 ; X86-SHLD-NEXT:    movl 4(%esp,%edx), %edx
 ; X86-SHLD-NEXT:    # kill: def $cl killed $cl killed $ecx
 ; X86-SHLD-NEXT:    shrdl %cl, %edx, %ebx
 ; X86-SHLD-NEXT:    movb %bl, (%eax)
 ; X86-SHLD-NEXT:    addl $136, %esp
 ; X86-SHLD-NEXT:    popl %ebx
 ; X86-SHLD-NEXT:    retl
 ;
 ; X86-HAVE-BMI2-NO-SHLD-LABEL: load_1byte_chunk_of_64byte_alloca_with_zero_upper_half:
 ; X86-HAVE-BMI2-NO-SHLD:       # %bb.0:
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    pushl %esi
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    subl $136, %esp
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %ecx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %eax
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %edx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movups (%edx), %xmm0
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movups 16(%edx), %xmm1
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    xorps %xmm2, %xmm2
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movaps %xmm2, {{[0-9]+}}(%esp)
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movaps %xmm2, {{[0-9]+}}(%esp)
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movaps %xmm2, {{[0-9]+}}(%esp)
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movaps %xmm2, {{[0-9]+}}(%esp)
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movaps %xmm2, {{[0-9]+}}(%esp)
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movaps %xmm2, {{[0-9]+}}(%esp)
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movaps %xmm1, {{[0-9]+}}(%esp)
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movaps %xmm0, (%esp)
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    leal (,%ecx,8), %edx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    andl $60, %ecx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    shrxl %edx, (%esp,%ecx), %esi
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    notb %dl
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movl 4(%esp,%ecx), %ecx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    addl %ecx, %ecx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    shlxl %edx, %ecx, %ecx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    orl %esi, %ecx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movb %cl, (%eax)
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    addl $136, %esp
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    popl %esi
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    retl
   %init = load <32 x i8>, ptr %src, align 1
   %intermediate.sroa.0.0.vec.expand = shufflevector <32 x i8> %init, <32 x i8> poison, <64 x i32> <i32 0, i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7, i32 8, i32 9, i32 10, i32 11, i32 12, i32 13, i32 14, i32 15, i32 16, i32 17, i32 18, i32 19, i32 20, i32 21, i32 22, i32 23, i32 24, i32 25, i32 26, i32 27, i32 28, i32 29, i32 30, i32 31, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef>
   %intermediate.sroa.0.0.vecblend = shufflevector <64 x i8> %intermediate.sroa.0.0.vec.expand, <64 x i8> <i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0>, <64 x i32> <i32 0, i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7, i32 8, i32 9, i32 10, i32 11, i32 12, i32 13, i32 14, i32 15, i32 16, i32 17, i32 18, i32 19, i32 20, i32 21, i32 22, i32 23, i32 24, i32 25, i32 26, i32 27, i32 28, i32 29, i32 30, i32 31, i32 96, i32 97, i32 98, i32 99, i32 100, i32 101, i32 102, i32 103, i32 104, i32 105, i32 106, i32 107, i32 108, i32 109, i32 110, i32 111, i32 112, i32 113, i32 114, i32 115, i32 116, i32 117, i32 118, i32 119, i32 120, i32 121, i32 122, i32 123, i32 124, i32 125, i32 126, i32 127>
   %byteOff.numbits = shl nuw nsw i64 %byteOff, 3
   %intermediate.val.frozen = freeze <64 x i8> %intermediate.sroa.0.0.vecblend
   %intermediate.val.frozen.bits = bitcast <64 x i8> %intermediate.val.frozen to i512
   %byteOff.numbits.wide = zext i64 %byteOff.numbits to i512
   %intermediate.val.frozen.bits.positioned = lshr i512 %intermediate.val.frozen.bits, %byteOff.numbits.wide
   %intermediate.val.frozen.bits.positioned.extracted = trunc i512 %intermediate.val.frozen.bits.positioned to i8
   %1 = insertelement <1 x i8> poison, i8 %intermediate.val.frozen.bits.positioned.extracted, i64 0
   store <1 x i8> %1, ptr %dst, align 1
   ret void
 }

 define void @load_2byte_chunk_of_64byte_alloca_with_zero_upper_half(ptr %src, i64 %byteOff, ptr %dst) nounwind {
 ; X64-NO-BMI2-LABEL: load_2byte_chunk_of_64byte_alloca_with_zero_upper_half:
 ; X64-NO-BMI2:       # %bb.0:
 ; X64-NO-BMI2-NEXT:    pushq %rax
 ; X64-NO-BMI2-NEXT:    movups (%rdi), %xmm0
 ; X64-NO-BMI2-NEXT:    movups 16(%rdi), %xmm1
 ; X64-NO-BMI2-NEXT:    xorps %xmm2, %xmm2
 ; X64-NO-BMI2-NEXT:    movaps %xmm2, -{{[0-9]+}}(%rsp)
 ; X64-NO-BMI2-NEXT:    movaps %xmm2, -{{[0-9]+}}(%rsp)
 ; X64-NO-BMI2-NEXT:    movaps %xmm2, -{{[0-9]+}}(%rsp)
 ; X64-NO-BMI2-NEXT:    movaps %xmm2, -{{[0-9]+}}(%rsp)
 ; X64-NO-BMI2-NEXT:    movaps %xmm2, -{{[0-9]+}}(%rsp)
 ; X64-NO-BMI2-NEXT:    movaps %xmm2, -{{[0-9]+}}(%rsp)
 ; X64-NO-BMI2-NEXT:    movaps %xmm1, -{{[0-9]+}}(%rsp)
 ; X64-NO-BMI2-NEXT:    movaps %xmm0, -{{[0-9]+}}(%rsp)
 ; X64-NO-BMI2-NEXT:    leal (,%rsi,8), %ecx
 ; X64-NO-BMI2-NEXT:    andl $56, %ecx
 ; X64-NO-BMI2-NEXT:    andl $56, %esi
 ; X64-NO-BMI2-NEXT:    movq -128(%rsp,%rsi), %rax
 ; X64-NO-BMI2-NEXT:    shrq %cl, %rax
 ; X64-NO-BMI2-NEXT:    movl -120(%rsp,%rsi), %esi
 ; X64-NO-BMI2-NEXT:    addl %esi, %esi
 ; X64-NO-BMI2-NEXT:    notl %ecx
 ; X64-NO-BMI2-NEXT:    # kill: def $cl killed $cl killed $ecx
 ; X64-NO-BMI2-NEXT:    shlq %cl, %rsi
 ; X64-NO-BMI2-NEXT:    orl %eax, %esi
 ; X64-NO-BMI2-NEXT:    movw %si, (%rdx)
 ; X64-NO-BMI2-NEXT:    popq %rax
 ; X64-NO-BMI2-NEXT:    retq
 ;
 ; X64-BMI2-LABEL: load_2byte_chunk_of_64byte_alloca_with_zero_upper_half:
 ; X64-BMI2:       # %bb.0:
 ; X64-BMI2-NEXT:    pushq %rax
 ; X64-BMI2-NEXT:    movups (%rdi), %xmm0
 ; X64-BMI2-NEXT:    movups 16(%rdi), %xmm1
 ; X64-BMI2-NEXT:    xorps %xmm2, %xmm2
 ; X64-BMI2-NEXT:    movaps %xmm2, -{{[0-9]+}}(%rsp)
 ; X64-BMI2-NEXT:    movaps %xmm2, -{{[0-9]+}}(%rsp)
 ; X64-BMI2-NEXT:    movaps %xmm2, -{{[0-9]+}}(%rsp)
 ; X64-BMI2-NEXT:    movaps %xmm2, -{{[0-9]+}}(%rsp)
 ; X64-BMI2-NEXT:    movaps %xmm2, -{{[0-9]+}}(%rsp)
 ; X64-BMI2-NEXT:    movaps %xmm2, -{{[0-9]+}}(%rsp)
 ; X64-BMI2-NEXT:    movaps %xmm1, -{{[0-9]+}}(%rsp)
 ; X64-BMI2-NEXT:    movaps %xmm0, -{{[0-9]+}}(%rsp)
 ; X64-BMI2-NEXT:    leal (,%rsi,8), %eax
 ; X64-BMI2-NEXT:    andl $56, %eax
 ; X64-BMI2-NEXT:    andl $56, %esi
 ; X64-BMI2-NEXT:    shrxq %rax, -128(%rsp,%rsi), %rcx
 ; X64-BMI2-NEXT:    # kill: def $eax killed $eax killed $rax def $rax
 ; X64-BMI2-NEXT:    notl %eax
 ; X64-BMI2-NEXT:    movl -120(%rsp,%rsi), %esi
 ; X64-BMI2-NEXT:    addl %esi, %esi
 ; X64-BMI2-NEXT:    shlxq %rax, %rsi, %rax
 ; X64-BMI2-NEXT:    orl %eax, %ecx
 ; X64-BMI2-NEXT:    movw %cx, (%rdx)
 ; X64-BMI2-NEXT:    popq %rax
 ; X64-BMI2-NEXT:    retq
 ;
 ; X86-NO-BMI2-NO-SHLD-LABEL: load_2byte_chunk_of_64byte_alloca_with_zero_upper_half:
 ; X86-NO-BMI2-NO-SHLD:       # %bb.0:
 ; X86-NO-BMI2-NO-SHLD-NEXT:    pushl %esi
 ; X86-NO-BMI2-NO-SHLD-NEXT:    subl $136, %esp
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %edx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %eax
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %ecx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movups (%ecx), %xmm0
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movups 16(%ecx), %xmm1
 ; X86-NO-BMI2-NO-SHLD-NEXT:    xorps %xmm2, %xmm2
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movaps %xmm2, {{[0-9]+}}(%esp)
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movaps %xmm2, {{[0-9]+}}(%esp)
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movaps %xmm2, {{[0-9]+}}(%esp)
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movaps %xmm2, {{[0-9]+}}(%esp)
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movaps %xmm2, {{[0-9]+}}(%esp)
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movaps %xmm2, {{[0-9]+}}(%esp)
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movaps %xmm1, {{[0-9]+}}(%esp)
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movaps %xmm0, (%esp)
 ; X86-NO-BMI2-NO-SHLD-NEXT:    leal (,%edx,8), %ecx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    andl $60, %edx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl (%esp,%edx), %esi
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl 4(%esp,%edx), %edx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    shrl %cl, %esi
 ; X86-NO-BMI2-NO-SHLD-NEXT:    notb %cl
 ; X86-NO-BMI2-NO-SHLD-NEXT:    addl %edx, %edx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    # kill: def $cl killed $cl killed $ecx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    shll %cl, %edx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    orl %esi, %edx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movw %dx, (%eax)
 ; X86-NO-BMI2-NO-SHLD-NEXT:    addl $136, %esp
 ; X86-NO-BMI2-NO-SHLD-NEXT:    popl %esi
 ; X86-NO-BMI2-NO-SHLD-NEXT:    retl
 ;
 ; X86-SHLD-LABEL: load_2byte_chunk_of_64byte_alloca_with_zero_upper_half:
 ; X86-SHLD:       # %bb.0:
 ; X86-SHLD-NEXT:    pushl %esi
 ; X86-SHLD-NEXT:    subl $136, %esp
 ; X86-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %edx
 ; X86-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %eax
 ; X86-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %ecx
 ; X86-SHLD-NEXT:    movups (%ecx), %xmm0
 ; X86-SHLD-NEXT:    movups 16(%ecx), %xmm1
 ; X86-SHLD-NEXT:    xorps %xmm2, %xmm2
 ; X86-SHLD-NEXT:    movaps %xmm2, {{[0-9]+}}(%esp)
 ; X86-SHLD-NEXT:    movaps %xmm2, {{[0-9]+}}(%esp)
 ; X86-SHLD-NEXT:    movaps %xmm2, {{[0-9]+}}(%esp)
 ; X86-SHLD-NEXT:    movaps %xmm2, {{[0-9]+}}(%esp)
 ; X86-SHLD-NEXT:    movaps %xmm2, {{[0-9]+}}(%esp)
 ; X86-SHLD-NEXT:    movaps %xmm2, {{[0-9]+}}(%esp)
 ; X86-SHLD-NEXT:    movaps %xmm1, {{[0-9]+}}(%esp)
 ; X86-SHLD-NEXT:    movaps %xmm0, (%esp)
 ; X86-SHLD-NEXT:    leal (,%edx,8), %ecx
 ; X86-SHLD-NEXT:    andl $60, %edx
 ; X86-SHLD-NEXT:    movl (%esp,%edx), %esi
 ; X86-SHLD-NEXT:    movl 4(%esp,%edx), %edx
 ; X86-SHLD-NEXT:    # kill: def $cl killed $cl killed $ecx
 ; X86-SHLD-NEXT:    shrdl %cl, %edx, %esi
 ; X86-SHLD-NEXT:    movw %si, (%eax)
 ; X86-SHLD-NEXT:    addl $136, %esp
 ; X86-SHLD-NEXT:    popl %esi
 ; X86-SHLD-NEXT:    retl
 ;
 ; X86-HAVE-BMI2-NO-SHLD-LABEL: load_2byte_chunk_of_64byte_alloca_with_zero_upper_half:
 ; X86-HAVE-BMI2-NO-SHLD:       # %bb.0:
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    pushl %esi
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    subl $136, %esp
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %ecx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %eax
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %edx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movups (%edx), %xmm0
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movups 16(%edx), %xmm1
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    xorps %xmm2, %xmm2
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movaps %xmm2, {{[0-9]+}}(%esp)
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movaps %xmm2, {{[0-9]+}}(%esp)
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movaps %xmm2, {{[0-9]+}}(%esp)
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movaps %xmm2, {{[0-9]+}}(%esp)
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movaps %xmm2, {{[0-9]+}}(%esp)
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movaps %xmm2, {{[0-9]+}}(%esp)
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movaps %xmm1, {{[0-9]+}}(%esp)
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movaps %xmm0, (%esp)
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    leal (,%ecx,8), %edx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    andl $60, %ecx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    shrxl %edx, (%esp,%ecx), %esi
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    notb %dl
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movl 4(%esp,%ecx), %ecx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    addl %ecx, %ecx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    shlxl %edx, %ecx, %ecx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    orl %esi, %ecx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movw %cx, (%eax)
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    addl $136, %esp
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    popl %esi
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    retl
   %init = load <32 x i8>, ptr %src, align 1
   %intermediate.sroa.0.0.vec.expand = shufflevector <32 x i8> %init, <32 x i8> poison, <64 x i32> <i32 0, i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7, i32 8, i32 9, i32 10, i32 11, i32 12, i32 13, i32 14, i32 15, i32 16, i32 17, i32 18, i32 19, i32 20, i32 21, i32 22, i32 23, i32 24, i32 25, i32 26, i32 27, i32 28, i32 29, i32 30, i32 31, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef>
   %intermediate.sroa.0.0.vecblend = shufflevector <64 x i8> %intermediate.sroa.0.0.vec.expand, <64 x i8> <i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0>, <64 x i32> <i32 0, i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7, i32 8, i32 9, i32 10, i32 11, i32 12, i32 13, i32 14, i32 15, i32 16, i32 17, i32 18, i32 19, i32 20, i32 21, i32 22, i32 23, i32 24, i32 25, i32 26, i32 27, i32 28, i32 29, i32 30, i32 31, i32 96, i32 97, i32 98, i32 99, i32 100, i32 101, i32 102, i32 103, i32 104, i32 105, i32 106, i32 107, i32 108, i32 109, i32 110, i32 111, i32 112, i32 113, i32 114, i32 115, i32 116, i32 117, i32 118, i32 119, i32 120, i32 121, i32 122, i32 123, i32 124, i32 125, i32 126, i32 127>
   %byteOff.numbits = shl nuw nsw i64 %byteOff, 3
   %intermediate.val.frozen = freeze <64 x i8> %intermediate.sroa.0.0.vecblend
   %intermediate.val.frozen.bits = bitcast <64 x i8> %intermediate.val.frozen to i512
   %byteOff.numbits.wide = zext i64 %byteOff.numbits to i512
   %intermediate.val.frozen.bits.positioned = lshr i512 %intermediate.val.frozen.bits, %byteOff.numbits.wide
   %intermediate.val.frozen.bits.positioned.extracted = trunc i512 %intermediate.val.frozen.bits.positioned to i16
   store i16 %intermediate.val.frozen.bits.positioned.extracted, ptr %dst, align 2
   ret void
 }

 define void @load_4byte_chunk_of_64byte_alloca_with_zero_upper_half(ptr %src, i64 %byteOff, ptr %dst) nounwind {
 ; X64-NO-BMI2-LABEL: load_4byte_chunk_of_64byte_alloca_with_zero_upper_half:
 ; X64-NO-BMI2:       # %bb.0:
 ; X64-NO-BMI2-NEXT:    pushq %rax
 ; X64-NO-BMI2-NEXT:    movups (%rdi), %xmm0
 ; X64-NO-BMI2-NEXT:    movups 16(%rdi), %xmm1
 ; X64-NO-BMI2-NEXT:    xorps %xmm2, %xmm2
 ; X64-NO-BMI2-NEXT:    movaps %xmm2, -{{[0-9]+}}(%rsp)
 ; X64-NO-BMI2-NEXT:    movaps %xmm2, -{{[0-9]+}}(%rsp)
 ; X64-NO-BMI2-NEXT:    movaps %xmm2, -{{[0-9]+}}(%rsp)
 ; X64-NO-BMI2-NEXT:    movaps %xmm2, -{{[0-9]+}}(%rsp)
 ; X64-NO-BMI2-NEXT:    movaps %xmm2, -{{[0-9]+}}(%rsp)
 ; X64-NO-BMI2-NEXT:    movaps %xmm2, -{{[0-9]+}}(%rsp)
 ; X64-NO-BMI2-NEXT:    movaps %xmm1, -{{[0-9]+}}(%rsp)
 ; X64-NO-BMI2-NEXT:    movaps %xmm0, -{{[0-9]+}}(%rsp)
 ; X64-NO-BMI2-NEXT:    leal (,%rsi,8), %ecx
 ; X64-NO-BMI2-NEXT:    andl $56, %ecx
 ; X64-NO-BMI2-NEXT:    andl $56, %esi
 ; X64-NO-BMI2-NEXT:    movq -128(%rsp,%rsi), %rax
 ; X64-NO-BMI2-NEXT:    shrq %cl, %rax
 ; X64-NO-BMI2-NEXT:    movl -120(%rsp,%rsi), %esi
 ; X64-NO-BMI2-NEXT:    addl %esi, %esi
 ; X64-NO-BMI2-NEXT:    notl %ecx
 ; X64-NO-BMI2-NEXT:    # kill: def $cl killed $cl killed $ecx
 ; X64-NO-BMI2-NEXT:    shlq %cl, %rsi
 ; X64-NO-BMI2-NEXT:    orl %eax, %esi
 ; X64-NO-BMI2-NEXT:    movl %esi, (%rdx)
 ; X64-NO-BMI2-NEXT:    popq %rax
 ; X64-NO-BMI2-NEXT:    retq
 ;
 ; X64-BMI2-LABEL: load_4byte_chunk_of_64byte_alloca_with_zero_upper_half:
 ; X64-BMI2:       # %bb.0:
 ; X64-BMI2-NEXT:    pushq %rax
 ; X64-BMI2-NEXT:    movups (%rdi), %xmm0
 ; X64-BMI2-NEXT:    movups 16(%rdi), %xmm1
 ; X64-BMI2-NEXT:    xorps %xmm2, %xmm2
 ; X64-BMI2-NEXT:    movaps %xmm2, -{{[0-9]+}}(%rsp)
 ; X64-BMI2-NEXT:    movaps %xmm2, -{{[0-9]+}}(%rsp)
 ; X64-BMI2-NEXT:    movaps %xmm2, -{{[0-9]+}}(%rsp)
 ; X64-BMI2-NEXT:    movaps %xmm2, -{{[0-9]+}}(%rsp)
 ; X64-BMI2-NEXT:    movaps %xmm2, -{{[0-9]+}}(%rsp)
 ; X64-BMI2-NEXT:    movaps %xmm2, -{{[0-9]+}}(%rsp)
 ; X64-BMI2-NEXT:    movaps %xmm1, -{{[0-9]+}}(%rsp)
 ; X64-BMI2-NEXT:    movaps %xmm0, -{{[0-9]+}}(%rsp)
 ; X64-BMI2-NEXT:    leal (,%rsi,8), %eax
 ; X64-BMI2-NEXT:    andl $56, %eax
 ; X64-BMI2-NEXT:    andl $56, %esi
 ; X64-BMI2-NEXT:    shrxq %rax, -128(%rsp,%rsi), %rcx
 ; X64-BMI2-NEXT:    # kill: def $eax killed $eax killed $rax def $rax
 ; X64-BMI2-NEXT:    notl %eax
 ; X64-BMI2-NEXT:    movl -120(%rsp,%rsi), %esi
 ; X64-BMI2-NEXT:    addl %esi, %esi
 ; X64-BMI2-NEXT:    shlxq %rax, %rsi, %rax
 ; X64-BMI2-NEXT:    orl %eax, %ecx
 ; X64-BMI2-NEXT:    movl %ecx, (%rdx)
 ; X64-BMI2-NEXT:    popq %rax
 ; X64-BMI2-NEXT:    retq
 ;
 ; X86-NO-BMI2-NO-SHLD-LABEL: load_4byte_chunk_of_64byte_alloca_with_zero_upper_half:
 ; X86-NO-BMI2-NO-SHLD:       # %bb.0:
 ; X86-NO-BMI2-NO-SHLD-NEXT:    pushl %esi
 ; X86-NO-BMI2-NO-SHLD-NEXT:    subl $136, %esp
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %edx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %eax
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %ecx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movups (%ecx), %xmm0
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movups 16(%ecx), %xmm1
 ; X86-NO-BMI2-NO-SHLD-NEXT:    xorps %xmm2, %xmm2
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movaps %xmm2, {{[0-9]+}}(%esp)
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movaps %xmm2, {{[0-9]+}}(%esp)
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movaps %xmm2, {{[0-9]+}}(%esp)
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movaps %xmm2, {{[0-9]+}}(%esp)
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movaps %xmm2, {{[0-9]+}}(%esp)
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movaps %xmm2, {{[0-9]+}}(%esp)
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movaps %xmm1, {{[0-9]+}}(%esp)
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movaps %xmm0, (%esp)
 ; X86-NO-BMI2-NO-SHLD-NEXT:    leal (,%edx,8), %ecx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    andl $60, %edx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl (%esp,%edx), %esi
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl 4(%esp,%edx), %edx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    shrl %cl, %esi
 ; X86-NO-BMI2-NO-SHLD-NEXT:    notb %cl
 ; X86-NO-BMI2-NO-SHLD-NEXT:    addl %edx, %edx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    # kill: def $cl killed $cl killed $ecx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    shll %cl, %edx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    orl %esi, %edx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl %edx, (%eax)
 ; X86-NO-BMI2-NO-SHLD-NEXT:    addl $136, %esp
 ; X86-NO-BMI2-NO-SHLD-NEXT:    popl %esi
 ; X86-NO-BMI2-NO-SHLD-NEXT:    retl
 ;
 ; X86-SHLD-LABEL: load_4byte_chunk_of_64byte_alloca_with_zero_upper_half:
 ; X86-SHLD:       # %bb.0:
 ; X86-SHLD-NEXT:    pushl %esi
 ; X86-SHLD-NEXT:    subl $136, %esp
 ; X86-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %edx
 ; X86-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %eax
 ; X86-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %ecx
 ; X86-SHLD-NEXT:    movups (%ecx), %xmm0
 ; X86-SHLD-NEXT:    movups 16(%ecx), %xmm1
 ; X86-SHLD-NEXT:    xorps %xmm2, %xmm2
 ; X86-SHLD-NEXT:    movaps %xmm2, {{[0-9]+}}(%esp)
 ; X86-SHLD-NEXT:    movaps %xmm2, {{[0-9]+}}(%esp)
 ; X86-SHLD-NEXT:    movaps %xmm2, {{[0-9]+}}(%esp)
 ; X86-SHLD-NEXT:    movaps %xmm2, {{[0-9]+}}(%esp)
 ; X86-SHLD-NEXT:    movaps %xmm2, {{[0-9]+}}(%esp)
 ; X86-SHLD-NEXT:    movaps %xmm2, {{[0-9]+}}(%esp)
 ; X86-SHLD-NEXT:    movaps %xmm1, {{[0-9]+}}(%esp)
 ; X86-SHLD-NEXT:    movaps %xmm0, (%esp)
 ; X86-SHLD-NEXT:    leal (,%edx,8), %ecx
 ; X86-SHLD-NEXT:    andl $60, %edx
 ; X86-SHLD-NEXT:    movl (%esp,%edx), %esi
 ; X86-SHLD-NEXT:    movl 4(%esp,%edx), %edx
 ; X86-SHLD-NEXT:    # kill: def $cl killed $cl killed $ecx
 ; X86-SHLD-NEXT:    shrdl %cl, %edx, %esi
 ; X86-SHLD-NEXT:    movl %esi, (%eax)
 ; X86-SHLD-NEXT:    addl $136, %esp
 ; X86-SHLD-NEXT:    popl %esi
 ; X86-SHLD-NEXT:    retl
 ;
 ; X86-HAVE-BMI2-NO-SHLD-LABEL: load_4byte_chunk_of_64byte_alloca_with_zero_upper_half:
 ; X86-HAVE-BMI2-NO-SHLD:       # %bb.0:
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    pushl %esi
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    subl $136, %esp
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %ecx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %eax
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %edx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movups (%edx), %xmm0
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movups 16(%edx), %xmm1
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    xorps %xmm2, %xmm2
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movaps %xmm2, {{[0-9]+}}(%esp)
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movaps %xmm2, {{[0-9]+}}(%esp)
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movaps %xmm2, {{[0-9]+}}(%esp)
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movaps %xmm2, {{[0-9]+}}(%esp)
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movaps %xmm2, {{[0-9]+}}(%esp)
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movaps %xmm2, {{[0-9]+}}(%esp)
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movaps %xmm1, {{[0-9]+}}(%esp)
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movaps %xmm0, (%esp)
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    leal (,%ecx,8), %edx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    andl $60, %ecx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    shrxl %edx, (%esp,%ecx), %esi
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    notb %dl
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movl 4(%esp,%ecx), %ecx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    addl %ecx, %ecx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    shlxl %edx, %ecx, %ecx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    orl %esi, %ecx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movl %ecx, (%eax)
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    addl $136, %esp
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    popl %esi
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    retl
   %init = load <32 x i8>, ptr %src, align 1
   %intermediate.sroa.0.0.vec.expand = shufflevector <32 x i8> %init, <32 x i8> poison, <64 x i32> <i32 0, i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7, i32 8, i32 9, i32 10, i32 11, i32 12, i32 13, i32 14, i32 15, i32 16, i32 17, i32 18, i32 19, i32 20, i32 21, i32 22, i32 23, i32 24, i32 25, i32 26, i32 27, i32 28, i32 29, i32 30, i32 31, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef>
   %intermediate.sroa.0.0.vecblend = shufflevector <64 x i8> %intermediate.sroa.0.0.vec.expand, <64 x i8> <i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0>, <64 x i32> <i32 0, i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7, i32 8, i32 9, i32 10, i32 11, i32 12, i32 13, i32 14, i32 15, i32 16, i32 17, i32 18, i32 19, i32 20, i32 21, i32 22, i32 23, i32 24, i32 25, i32 26, i32 27, i32 28, i32 29, i32 30, i32 31, i32 96, i32 97, i32 98, i32 99, i32 100, i32 101, i32 102, i32 103, i32 104, i32 105, i32 106, i32 107, i32 108, i32 109, i32 110, i32 111, i32 112, i32 113, i32 114, i32 115, i32 116, i32 117, i32 118, i32 119, i32 120, i32 121, i32 122, i32 123, i32 124, i32 125, i32 126, i32 127>
   %byteOff.numbits = shl nuw nsw i64 %byteOff, 3
   %intermediate.val.frozen = freeze <64 x i8> %intermediate.sroa.0.0.vecblend
   %intermediate.val.frozen.bits = bitcast <64 x i8> %intermediate.val.frozen to i512
   %byteOff.numbits.wide = zext i64 %byteOff.numbits to i512
   %intermediate.val.frozen.bits.positioned = lshr i512 %intermediate.val.frozen.bits, %byteOff.numbits.wide
   %intermediate.val.frozen.bits.positioned.extracted = trunc i512 %intermediate.val.frozen.bits.positioned to i32
   store i32 %intermediate.val.frozen.bits.positioned.extracted, ptr %dst, align 4
   ret void
 }

 define void @load_8byte_chunk_of_64byte_alloca_with_zero_upper_half(ptr %src, i64 %byteOff, ptr %dst) nounwind {
 ; X64-NO-BMI2-NO-SHLD-LABEL: load_8byte_chunk_of_64byte_alloca_with_zero_upper_half:
 ; X64-NO-BMI2-NO-SHLD:       # %bb.0:
 ; X64-NO-BMI2-NO-SHLD-NEXT:    pushq %rax
 ; X64-NO-BMI2-NO-SHLD-NEXT:    movups (%rdi), %xmm0
 ; X64-NO-BMI2-NO-SHLD-NEXT:    movups 16(%rdi), %xmm1
 ; X64-NO-BMI2-NO-SHLD-NEXT:    xorps %xmm2, %xmm2
 ; X64-NO-BMI2-NO-SHLD-NEXT:    movaps %xmm2, -{{[0-9]+}}(%rsp)
 ; X64-NO-BMI2-NO-SHLD-NEXT:    movaps %xmm2, -{{[0-9]+}}(%rsp)
 ; X64-NO-BMI2-NO-SHLD-NEXT:    movaps %xmm2, -{{[0-9]+}}(%rsp)
 ; X64-NO-BMI2-NO-SHLD-NEXT:    movaps %xmm2, -{{[0-9]+}}(%rsp)
 ; X64-NO-BMI2-NO-SHLD-NEXT:    movaps %xmm2, -{{[0-9]+}}(%rsp)
 ; X64-NO-BMI2-NO-SHLD-NEXT:    movaps %xmm2, -{{[0-9]+}}(%rsp)
 ; X64-NO-BMI2-NO-SHLD-NEXT:    movaps %xmm1, -{{[0-9]+}}(%rsp)
 ; X64-NO-BMI2-NO-SHLD-NEXT:    movaps %xmm0, -{{[0-9]+}}(%rsp)
 ; X64-NO-BMI2-NO-SHLD-NEXT:    leal (,%rsi,8), %ecx
 ; X64-NO-BMI2-NO-SHLD-NEXT:    andl $56, %esi
 ; X64-NO-BMI2-NO-SHLD-NEXT:    movq -128(%rsp,%rsi), %rax
 ; X64-NO-BMI2-NO-SHLD-NEXT:    movq -120(%rsp,%rsi), %rsi
 ; X64-NO-BMI2-NO-SHLD-NEXT:    shrq %cl, %rax
 ; X64-NO-BMI2-NO-SHLD-NEXT:    notb %cl
 ; X64-NO-BMI2-NO-SHLD-NEXT:    addq %rsi, %rsi
 ; X64-NO-BMI2-NO-SHLD-NEXT:    # kill: def $cl killed $cl killed $ecx
 ; X64-NO-BMI2-NO-SHLD-NEXT:    shlq %cl, %rsi
 ; X64-NO-BMI2-NO-SHLD-NEXT:    orq %rax, %rsi
 ; X64-NO-BMI2-NO-SHLD-NEXT:    movq %rsi, (%rdx)
 ; X64-NO-BMI2-NO-SHLD-NEXT:    popq %rax
 ; X64-NO-BMI2-NO-SHLD-NEXT:    retq
 ;
 ; X64-SHLD-LABEL: load_8byte_chunk_of_64byte_alloca_with_zero_upper_half:
 ; X64-SHLD:       # %bb.0:
 ; X64-SHLD-NEXT:    pushq %rax
 ; X64-SHLD-NEXT:    movups (%rdi), %xmm0
 ; X64-SHLD-NEXT:    movups 16(%rdi), %xmm1
 ; X64-SHLD-NEXT:    xorps %xmm2, %xmm2
 ; X64-SHLD-NEXT:    movaps %xmm2, -{{[0-9]+}}(%rsp)
 ; X64-SHLD-NEXT:    movaps %xmm2, -{{[0-9]+}}(%rsp)
 ; X64-SHLD-NEXT:    movaps %xmm2, -{{[0-9]+}}(%rsp)
 ; X64-SHLD-NEXT:    movaps %xmm2, -{{[0-9]+}}(%rsp)
 ; X64-SHLD-NEXT:    movaps %xmm2, -{{[0-9]+}}(%rsp)
 ; X64-SHLD-NEXT:    movaps %xmm2, -{{[0-9]+}}(%rsp)
 ; X64-SHLD-NEXT:    movaps %xmm1, -{{[0-9]+}}(%rsp)
 ; X64-SHLD-NEXT:    movaps %xmm0, -{{[0-9]+}}(%rsp)
 ; X64-SHLD-NEXT:    leal (,%rsi,8), %ecx
 ; X64-SHLD-NEXT:    andl $56, %esi
 ; X64-SHLD-NEXT:    movq -128(%rsp,%rsi), %rax
 ; X64-SHLD-NEXT:    movq -120(%rsp,%rsi), %rsi
 ; X64-SHLD-NEXT:    # kill: def $cl killed $cl killed $ecx
 ; X64-SHLD-NEXT:    shrdq %cl, %rsi, %rax
 ; X64-SHLD-NEXT:    movq %rax, (%rdx)
 ; X64-SHLD-NEXT:    popq %rax
 ; X64-SHLD-NEXT:    retq
 ;
 ; X64-HAVE-BMI2-NO-SHLD-LABEL: load_8byte_chunk_of_64byte_alloca_with_zero_upper_half:
 ; X64-HAVE-BMI2-NO-SHLD:       # %bb.0:
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    pushq %rax
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    movups (%rdi), %xmm0
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    movups 16(%rdi), %xmm1
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    xorps %xmm2, %xmm2
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    movaps %xmm2, -{{[0-9]+}}(%rsp)
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    movaps %xmm2, -{{[0-9]+}}(%rsp)
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    movaps %xmm2, -{{[0-9]+}}(%rsp)
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    movaps %xmm2, -{{[0-9]+}}(%rsp)
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    movaps %xmm2, -{{[0-9]+}}(%rsp)
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    movaps %xmm2, -{{[0-9]+}}(%rsp)
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    movaps %xmm1, -{{[0-9]+}}(%rsp)
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    movaps %xmm0, -{{[0-9]+}}(%rsp)
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    leal (,%rsi,8), %eax
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    andl $56, %esi
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    shrxq %rax, -128(%rsp,%rsi), %rcx
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    notb %al
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    movq -120(%rsp,%rsi), %rsi
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    addq %rsi, %rsi
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    shlxq %rax, %rsi, %rax
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    orq %rcx, %rax
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    movq %rax, (%rdx)
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    popq %rax
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    retq
 ;
 ; X86-NO-BMI2-NO-SHLD-LABEL: load_8byte_chunk_of_64byte_alloca_with_zero_upper_half:
 ; X86-NO-BMI2-NO-SHLD:       # %bb.0:
 ; X86-NO-BMI2-NO-SHLD-NEXT:    pushl %ebp
 ; X86-NO-BMI2-NO-SHLD-NEXT:    pushl %ebx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    pushl %edi
 ; X86-NO-BMI2-NO-SHLD-NEXT:    pushl %esi
 ; X86-NO-BMI2-NO-SHLD-NEXT:    subl $140, %esp
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %eax
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %ecx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movups (%ecx), %xmm0
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movups 16(%ecx), %xmm1
 ; X86-NO-BMI2-NO-SHLD-NEXT:    xorps %xmm2, %xmm2
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movaps %xmm2, {{[0-9]+}}(%esp)
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movaps %xmm2, {{[0-9]+}}(%esp)
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movaps %xmm2, {{[0-9]+}}(%esp)
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movaps %xmm2, {{[0-9]+}}(%esp)
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movaps %xmm2, {{[0-9]+}}(%esp)
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movaps %xmm2, {{[0-9]+}}(%esp)
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movaps %xmm1, {{[0-9]+}}(%esp)
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movaps %xmm0, (%esp)
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl %eax, %ebx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    andl $60, %ebx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl (%esp,%ebx), %esi
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl 4(%esp,%ebx), %edi
 ; X86-NO-BMI2-NO-SHLD-NEXT:    shll $3, %eax
 ; X86-NO-BMI2-NO-SHLD-NEXT:    andl $24, %eax
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl %eax, %ecx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    shrl %cl, %esi
 ; X86-NO-BMI2-NO-SHLD-NEXT:    leal (%edi,%edi), %ebp
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl %eax, %edx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    notb %dl
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl %edx, %ecx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    shll %cl, %ebp
 ; X86-NO-BMI2-NO-SHLD-NEXT:    orl %esi, %ebp
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl %eax, %ecx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    shrl %cl, %edi
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl 8(%esp,%ebx), %eax
 ; X86-NO-BMI2-NO-SHLD-NEXT:    addl %eax, %eax
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl %edx, %ecx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    shll %cl, %eax
 ; X86-NO-BMI2-NO-SHLD-NEXT:    orl %edi, %eax
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %ecx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl %eax, 4(%ecx)
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl %ebp, (%ecx)
 ; X86-NO-BMI2-NO-SHLD-NEXT:    addl $140, %esp
 ; X86-NO-BMI2-NO-SHLD-NEXT:    popl %esi
 ; X86-NO-BMI2-NO-SHLD-NEXT:    popl %edi
 ; X86-NO-BMI2-NO-SHLD-NEXT:    popl %ebx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    popl %ebp
 ; X86-NO-BMI2-NO-SHLD-NEXT:    retl
 ;
 ; X86-SHLD-LABEL: load_8byte_chunk_of_64byte_alloca_with_zero_upper_half:
 ; X86-SHLD:       # %bb.0:
 ; X86-SHLD-NEXT:    pushl %ebx
 ; X86-SHLD-NEXT:    pushl %edi
 ; X86-SHLD-NEXT:    pushl %esi
 ; X86-SHLD-NEXT:    subl $128, %esp
 ; X86-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %ecx
 ; X86-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %eax
 ; X86-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %edx
 ; X86-SHLD-NEXT:    movups (%edx), %xmm0
 ; X86-SHLD-NEXT:    movups 16(%edx), %xmm1
 ; X86-SHLD-NEXT:    xorps %xmm2, %xmm2
 ; X86-SHLD-NEXT:    movaps %xmm2, {{[0-9]+}}(%esp)
 ; X86-SHLD-NEXT:    movaps %xmm2, {{[0-9]+}}(%esp)
 ; X86-SHLD-NEXT:    movaps %xmm2, {{[0-9]+}}(%esp)
 ; X86-SHLD-NEXT:    movaps %xmm2, {{[0-9]+}}(%esp)
 ; X86-SHLD-NEXT:    movaps %xmm2, {{[0-9]+}}(%esp)
 ; X86-SHLD-NEXT:    movaps %xmm2, {{[0-9]+}}(%esp)
 ; X86-SHLD-NEXT:    movaps %xmm1, {{[0-9]+}}(%esp)
 ; X86-SHLD-NEXT:    movaps %xmm0, (%esp)
 ; X86-SHLD-NEXT:    movl %ecx, %esi
 ; X86-SHLD-NEXT:    andl $60, %esi
 ; X86-SHLD-NEXT:    movl 8(%esp,%esi), %edi
 ; X86-SHLD-NEXT:    movl (%esp,%esi), %edx
 ; X86-SHLD-NEXT:    movl 4(%esp,%esi), %esi
 ; X86-SHLD-NEXT:    shll $3, %ecx
 ; X86-SHLD-NEXT:    andl $24, %ecx
 ; X86-SHLD-NEXT:    movl %esi, %ebx
 ; X86-SHLD-NEXT:    shrdl %cl, %edi, %ebx
 ; X86-SHLD-NEXT:    # kill: def $cl killed $cl killed $ecx
 ; X86-SHLD-NEXT:    shrdl %cl, %esi, %edx
 ; X86-SHLD-NEXT:    movl %ebx, 4(%eax)
 ; X86-SHLD-NEXT:    movl %edx, (%eax)
 ; X86-SHLD-NEXT:    addl $128, %esp
 ; X86-SHLD-NEXT:    popl %esi
 ; X86-SHLD-NEXT:    popl %edi
 ; X86-SHLD-NEXT:    popl %ebx
 ; X86-SHLD-NEXT:    retl
 ;
 ; X86-HAVE-BMI2-NO-SHLD-LABEL: load_8byte_chunk_of_64byte_alloca_with_zero_upper_half:
 ; X86-HAVE-BMI2-NO-SHLD:       # %bb.0:
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    pushl %ebx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    pushl %edi
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    pushl %esi
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    subl $128, %esp
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %ecx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %eax
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %edx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movups (%edx), %xmm0
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movups 16(%edx), %xmm1
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    xorps %xmm2, %xmm2
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movaps %xmm2, {{[0-9]+}}(%esp)
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movaps %xmm2, {{[0-9]+}}(%esp)
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movaps %xmm2, {{[0-9]+}}(%esp)
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movaps %xmm2, {{[0-9]+}}(%esp)
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movaps %xmm2, {{[0-9]+}}(%esp)
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movaps %xmm2, {{[0-9]+}}(%esp)
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movaps %xmm1, {{[0-9]+}}(%esp)
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movaps %xmm0, (%esp)
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    leal (,%ecx,8), %edx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    andl $24, %edx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    andl $60, %ecx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    shrxl %edx, (%esp,%ecx), %esi
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movl 4(%esp,%ecx), %edi
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    shrxl %edx, %edi, %ebx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    # kill: def $dl killed $dl killed $edx def $edx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    notb %dl
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movl 8(%esp,%ecx), %ecx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    addl %edi, %edi
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    shlxl %edx, %edi, %edi
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    orl %esi, %edi
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    addl %ecx, %ecx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    shlxl %edx, %ecx, %ecx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    orl %ebx, %ecx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movl %ecx, 4(%eax)
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movl %edi, (%eax)
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    addl $128, %esp
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    popl %esi
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    popl %edi
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    popl %ebx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    retl
   %init = load <32 x i8>, ptr %src, align 1
   %intermediate.sroa.0.0.vec.expand = shufflevector <32 x i8> %init, <32 x i8> poison, <64 x i32> <i32 0, i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7, i32 8, i32 9, i32 10, i32 11, i32 12, i32 13, i32 14, i32 15, i32 16, i32 17, i32 18, i32 19, i32 20, i32 21, i32 22, i32 23, i32 24, i32 25, i32 26, i32 27, i32 28, i32 29, i32 30, i32 31, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef>
   %intermediate.sroa.0.0.vecblend = shufflevector <64 x i8> %intermediate.sroa.0.0.vec.expand, <64 x i8> <i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0>, <64 x i32> <i32 0, i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7, i32 8, i32 9, i32 10, i32 11, i32 12, i32 13, i32 14, i32 15, i32 16, i32 17, i32 18, i32 19, i32 20, i32 21, i32 22, i32 23, i32 24, i32 25, i32 26, i32 27, i32 28, i32 29, i32 30, i32 31, i32 96, i32 97, i32 98, i32 99, i32 100, i32 101, i32 102, i32 103, i32 104, i32 105, i32 106, i32 107, i32 108, i32 109, i32 110, i32 111, i32 112, i32 113, i32 114, i32 115, i32 116, i32 117, i32 118, i32 119, i32 120, i32 121, i32 122, i32 123, i32 124, i32 125, i32 126, i32 127>
   %byteOff.numbits = shl nuw nsw i64 %byteOff, 3
   %intermediate.val.frozen = freeze <64 x i8> %intermediate.sroa.0.0.vecblend
   %intermediate.val.frozen.bits = bitcast <64 x i8> %intermediate.val.frozen to i512
   %byteOff.numbits.wide = zext i64 %byteOff.numbits to i512
   %intermediate.val.frozen.bits.positioned = lshr i512 %intermediate.val.frozen.bits, %byteOff.numbits.wide
   %intermediate.val.frozen.bits.positioned.extracted = trunc i512 %intermediate.val.frozen.bits.positioned to i64
   store i64 %intermediate.val.frozen.bits.positioned.extracted, ptr %dst, align 8
   ret void
 }

 define void @load_16byte_chunk_of_64byte_alloca_with_zero_upper_half(ptr %src, i64 %byteOff, ptr %dst) nounwind {
 ; X64-NO-BMI2-NO-SHLD-LABEL: load_16byte_chunk_of_64byte_alloca_with_zero_upper_half:
 ; X64-NO-BMI2-NO-SHLD:       # %bb.0:
 ; X64-NO-BMI2-NO-SHLD-NEXT:    pushq %rax
 ; X64-NO-BMI2-NO-SHLD-NEXT:    movups (%rdi), %xmm0
 ; X64-NO-BMI2-NO-SHLD-NEXT:    movups 16(%rdi), %xmm1
 ; X64-NO-BMI2-NO-SHLD-NEXT:    xorps %xmm2, %xmm2
 ; X64-NO-BMI2-NO-SHLD-NEXT:    movaps %xmm2, -{{[0-9]+}}(%rsp)
 ; X64-NO-BMI2-NO-SHLD-NEXT:    movaps %xmm2, -{{[0-9]+}}(%rsp)
 ; X64-NO-BMI2-NO-SHLD-NEXT:    movaps %xmm2, -{{[0-9]+}}(%rsp)
 ; X64-NO-BMI2-NO-SHLD-NEXT:    movaps %xmm2, -{{[0-9]+}}(%rsp)
 ; X64-NO-BMI2-NO-SHLD-NEXT:    movaps %xmm2, -{{[0-9]+}}(%rsp)
 ; X64-NO-BMI2-NO-SHLD-NEXT:    movaps %xmm2, -{{[0-9]+}}(%rsp)
 ; X64-NO-BMI2-NO-SHLD-NEXT:    movaps %xmm1, -{{[0-9]+}}(%rsp)
 ; X64-NO-BMI2-NO-SHLD-NEXT:    movaps %xmm0, -{{[0-9]+}}(%rsp)
 ; X64-NO-BMI2-NO-SHLD-NEXT:    leal (,%rsi,8), %eax
 ; X64-NO-BMI2-NO-SHLD-NEXT:    movl %eax, %edi
 ; X64-NO-BMI2-NO-SHLD-NEXT:    andl $56, %edi
 ; X64-NO-BMI2-NO-SHLD-NEXT:    andl $56, %esi
 ; X64-NO-BMI2-NO-SHLD-NEXT:    movq -128(%rsp,%rsi), %r8
 ; X64-NO-BMI2-NO-SHLD-NEXT:    movq -120(%rsp,%rsi), %r9
 ; X64-NO-BMI2-NO-SHLD-NEXT:    movl %edi, %ecx
 ; X64-NO-BMI2-NO-SHLD-NEXT:    shrq %cl, %r8
 ; X64-NO-BMI2-NO-SHLD-NEXT:    notb %cl
 ; X64-NO-BMI2-NO-SHLD-NEXT:    leaq (%r9,%r9), %r10
 ; X64-NO-BMI2-NO-SHLD-NEXT:    shlq %cl, %r10
 ; X64-NO-BMI2-NO-SHLD-NEXT:    orq %r8, %r10
 ; X64-NO-BMI2-NO-SHLD-NEXT:    movl %edi, %ecx
 ; X64-NO-BMI2-NO-SHLD-NEXT:    shrq %cl, %r9
 ; X64-NO-BMI2-NO-SHLD-NEXT:    notl %eax
 ; X64-NO-BMI2-NO-SHLD-NEXT:    movq -112(%rsp,%rsi), %rsi
 ; X64-NO-BMI2-NO-SHLD-NEXT:    addq %rsi, %rsi
 ; X64-NO-BMI2-NO-SHLD-NEXT:    movl %eax, %ecx
 ; X64-NO-BMI2-NO-SHLD-NEXT:    shlq %cl, %rsi
 ; X64-NO-BMI2-NO-SHLD-NEXT:    orq %r9, %rsi
 ; X64-NO-BMI2-NO-SHLD-NEXT:    movq %rsi, 8(%rdx)
 ; X64-NO-BMI2-NO-SHLD-NEXT:    movq %r10, (%rdx)
 ; X64-NO-BMI2-NO-SHLD-NEXT:    popq %rax
 ; X64-NO-BMI2-NO-SHLD-NEXT:    retq
 ;
 ; X64-NO-BMI2-HAVE-SHLD-LABEL: load_16byte_chunk_of_64byte_alloca_with_zero_upper_half:
 ; X64-NO-BMI2-HAVE-SHLD:       # %bb.0:
 ; X64-NO-BMI2-HAVE-SHLD-NEXT:    pushq %rax
 ; X64-NO-BMI2-HAVE-SHLD-NEXT:    movups (%rdi), %xmm0
 ; X64-NO-BMI2-HAVE-SHLD-NEXT:    movups 16(%rdi), %xmm1
 ; X64-NO-BMI2-HAVE-SHLD-NEXT:    xorps %xmm2, %xmm2
 ; X64-NO-BMI2-HAVE-SHLD-NEXT:    movaps %xmm2, -{{[0-9]+}}(%rsp)
 ; X64-NO-BMI2-HAVE-SHLD-NEXT:    movaps %xmm2, -{{[0-9]+}}(%rsp)
 ; X64-NO-BMI2-HAVE-SHLD-NEXT:    movaps %xmm2, -{{[0-9]+}}(%rsp)
 ; X64-NO-BMI2-HAVE-SHLD-NEXT:    movaps %xmm2, -{{[0-9]+}}(%rsp)
 ; X64-NO-BMI2-HAVE-SHLD-NEXT:    movaps %xmm2, -{{[0-9]+}}(%rsp)
 ; X64-NO-BMI2-HAVE-SHLD-NEXT:    movaps %xmm2, -{{[0-9]+}}(%rsp)
 ; X64-NO-BMI2-HAVE-SHLD-NEXT:    movaps %xmm1, -{{[0-9]+}}(%rsp)
 ; X64-NO-BMI2-HAVE-SHLD-NEXT:    movaps %xmm0, -{{[0-9]+}}(%rsp)
 ; X64-NO-BMI2-HAVE-SHLD-NEXT:    leal (,%rsi,8), %eax
 ; X64-NO-BMI2-HAVE-SHLD-NEXT:    movl %eax, %edi
 ; X64-NO-BMI2-HAVE-SHLD-NEXT:    andl $56, %edi
 ; X64-NO-BMI2-HAVE-SHLD-NEXT:    andl $56, %esi
 ; X64-NO-BMI2-HAVE-SHLD-NEXT:    movq -128(%rsp,%rsi), %r8
 ; X64-NO-BMI2-HAVE-SHLD-NEXT:    movq -120(%rsp,%rsi), %r9
 ; X64-NO-BMI2-HAVE-SHLD-NEXT:    movq %r9, %r10
 ; X64-NO-BMI2-HAVE-SHLD-NEXT:    movl %edi, %ecx
 ; X64-NO-BMI2-HAVE-SHLD-NEXT:    shrq %cl, %r10
 ; X64-NO-BMI2-HAVE-SHLD-NEXT:    notl %eax
 ; X64-NO-BMI2-HAVE-SHLD-NEXT:    movq -112(%rsp,%rsi), %rsi
 ; X64-NO-BMI2-HAVE-SHLD-NEXT:    addq %rsi, %rsi
 ; X64-NO-BMI2-HAVE-SHLD-NEXT:    movl %eax, %ecx
 ; X64-NO-BMI2-HAVE-SHLD-NEXT:    shlq %cl, %rsi
 ; X64-NO-BMI2-HAVE-SHLD-NEXT:    orq %r10, %rsi
 ; X64-NO-BMI2-HAVE-SHLD-NEXT:    movl %edi, %ecx
 ; X64-NO-BMI2-HAVE-SHLD-NEXT:    shrdq %cl, %r9, %r8
 ; X64-NO-BMI2-HAVE-SHLD-NEXT:    movq %r8, (%rdx)
 ; X64-NO-BMI2-HAVE-SHLD-NEXT:    movq %rsi, 8(%rdx)
 ; X64-NO-BMI2-HAVE-SHLD-NEXT:    popq %rax
 ; X64-NO-BMI2-HAVE-SHLD-NEXT:    retq
 ;
 ; X64-HAVE-BMI2-NO-SHLD-LABEL: load_16byte_chunk_of_64byte_alloca_with_zero_upper_half:
 ; X64-HAVE-BMI2-NO-SHLD:       # %bb.0:
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    pushq %rax
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    movups (%rdi), %xmm0
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    movups 16(%rdi), %xmm1
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    xorps %xmm2, %xmm2
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    movaps %xmm2, -{{[0-9]+}}(%rsp)
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    movaps %xmm2, -{{[0-9]+}}(%rsp)
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    movaps %xmm2, -{{[0-9]+}}(%rsp)
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    movaps %xmm2, -{{[0-9]+}}(%rsp)
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    movaps %xmm2, -{{[0-9]+}}(%rsp)
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    movaps %xmm2, -{{[0-9]+}}(%rsp)
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    movaps %xmm1, -{{[0-9]+}}(%rsp)
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    movaps %xmm0, -{{[0-9]+}}(%rsp)
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    leal (,%rsi,8), %eax
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    movl %eax, %ecx
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    andl $56, %ecx
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    andl $56, %esi
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    shrxq %rcx, -128(%rsp,%rsi), %rdi
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    movq -120(%rsp,%rsi), %r8
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    shrxq %rcx, %r8, %r9
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    # kill: def $cl killed $cl killed $rcx def $rcx
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    notb %cl
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    movq -112(%rsp,%rsi), %rsi
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    addq %r8, %r8
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    shlxq %rcx, %r8, %rcx
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    orq %rdi, %rcx
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    notl %eax
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    addq %rsi, %rsi
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    shlxq %rax, %rsi, %rax
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    orq %rax, %r9
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    movq %r9, 8(%rdx)
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    movq %rcx, (%rdx)
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    popq %rax
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    retq
 ;
 ; X64-HAVE-BMI2-HAVE-SHLD-LABEL: load_16byte_chunk_of_64byte_alloca_with_zero_upper_half:
 ; X64-HAVE-BMI2-HAVE-SHLD:       # %bb.0:
 ; X64-HAVE-BMI2-HAVE-SHLD-NEXT:    pushq %rax
 ; X64-HAVE-BMI2-HAVE-SHLD-NEXT:    movups (%rdi), %xmm0
 ; X64-HAVE-BMI2-HAVE-SHLD-NEXT:    movups 16(%rdi), %xmm1
 ; X64-HAVE-BMI2-HAVE-SHLD-NEXT:    xorps %xmm2, %xmm2
 ; X64-HAVE-BMI2-HAVE-SHLD-NEXT:    movaps %xmm2, -{{[0-9]+}}(%rsp)
 ; X64-HAVE-BMI2-HAVE-SHLD-NEXT:    movaps %xmm2, -{{[0-9]+}}(%rsp)
 ; X64-HAVE-BMI2-HAVE-SHLD-NEXT:    movaps %xmm2, -{{[0-9]+}}(%rsp)
 ; X64-HAVE-BMI2-HAVE-SHLD-NEXT:    movaps %xmm2, -{{[0-9]+}}(%rsp)
 ; X64-HAVE-BMI2-HAVE-SHLD-NEXT:    movaps %xmm2, -{{[0-9]+}}(%rsp)
 ; X64-HAVE-BMI2-HAVE-SHLD-NEXT:    movaps %xmm2, -{{[0-9]+}}(%rsp)
 ; X64-HAVE-BMI2-HAVE-SHLD-NEXT:    movaps %xmm1, -{{[0-9]+}}(%rsp)
 ; X64-HAVE-BMI2-HAVE-SHLD-NEXT:    movaps %xmm0, -{{[0-9]+}}(%rsp)
 ; X64-HAVE-BMI2-HAVE-SHLD-NEXT:    leal (,%rsi,8), %ecx
 ; X64-HAVE-BMI2-HAVE-SHLD-NEXT:    movl %ecx, %eax
 ; X64-HAVE-BMI2-HAVE-SHLD-NEXT:    notl %eax
 ; X64-HAVE-BMI2-HAVE-SHLD-NEXT:    andl $56, %esi
 ; X64-HAVE-BMI2-HAVE-SHLD-NEXT:    movq -112(%rsp,%rsi), %rdi
 ; X64-HAVE-BMI2-HAVE-SHLD-NEXT:    addq %rdi, %rdi
 ; X64-HAVE-BMI2-HAVE-SHLD-NEXT:    shlxq %rax, %rdi, %rax
 ; X64-HAVE-BMI2-HAVE-SHLD-NEXT:    andl $56, %ecx
 ; X64-HAVE-BMI2-HAVE-SHLD-NEXT:    movq -128(%rsp,%rsi), %rdi
 ; X64-HAVE-BMI2-HAVE-SHLD-NEXT:    movq -120(%rsp,%rsi), %rsi
 ; X64-HAVE-BMI2-HAVE-SHLD-NEXT:    shrxq %rcx, %rsi, %r8
 ; X64-HAVE-BMI2-HAVE-SHLD-NEXT:    orq %rax, %r8
 ; X64-HAVE-BMI2-HAVE-SHLD-NEXT:    # kill: def $cl killed $cl killed $rcx
 ; X64-HAVE-BMI2-HAVE-SHLD-NEXT:    shrdq %cl, %rsi, %rdi
 ; X64-HAVE-BMI2-HAVE-SHLD-NEXT:    movq %rdi, (%rdx)
 ; X64-HAVE-BMI2-HAVE-SHLD-NEXT:    movq %r8, 8(%rdx)
 ; X64-HAVE-BMI2-HAVE-SHLD-NEXT:    popq %rax
 ; X64-HAVE-BMI2-HAVE-SHLD-NEXT:    retq
 ;
 ; X86-NO-BMI2-NO-SHLD-LABEL: load_16byte_chunk_of_64byte_alloca_with_zero_upper_half:
 ; X86-NO-BMI2-NO-SHLD:       # %bb.0:
 ; X86-NO-BMI2-NO-SHLD-NEXT:    pushl %ebp
 ; X86-NO-BMI2-NO-SHLD-NEXT:    pushl %ebx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    pushl %edi
 ; X86-NO-BMI2-NO-SHLD-NEXT:    pushl %esi
 ; X86-NO-BMI2-NO-SHLD-NEXT:    subl $156, %esp
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %eax
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %ecx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movups (%ecx), %xmm0
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movups 16(%ecx), %xmm1
 ; X86-NO-BMI2-NO-SHLD-NEXT:    xorps %xmm2, %xmm2
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movaps %xmm2, {{[0-9]+}}(%esp)
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movaps %xmm2, {{[0-9]+}}(%esp)
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movaps %xmm2, {{[0-9]+}}(%esp)
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movaps %xmm2, {{[0-9]+}}(%esp)
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movaps %xmm2, {{[0-9]+}}(%esp)
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movaps %xmm2, {{[0-9]+}}(%esp)
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movaps %xmm1, {{[0-9]+}}(%esp)
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movaps %xmm0, {{[0-9]+}}(%esp)
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl %eax, %esi
 ; X86-NO-BMI2-NO-SHLD-NEXT:    andl $60, %esi
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl 16(%esp,%esi), %ebx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl 20(%esp,%esi), %ebp
 ; X86-NO-BMI2-NO-SHLD-NEXT:    shll $3, %eax
 ; X86-NO-BMI2-NO-SHLD-NEXT:    andl $24, %eax
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl %eax, %ecx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    shrl %cl, %ebx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    leal (%ebp,%ebp), %edi
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl %eax, %edx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    notb %dl
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl %edx, %ecx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    shll %cl, %edi
 ; X86-NO-BMI2-NO-SHLD-NEXT:    orl %ebx, %edi
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl %edi, {{[-0-9]+}}(%e{{[sb]}}p) # 4-byte Spill
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl %eax, %ecx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    shrl %cl, %ebp
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl 24(%esp,%esi), %ebx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    leal (%ebx,%ebx), %edi
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl %edx, %ecx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    shll %cl, %edi
 ; X86-NO-BMI2-NO-SHLD-NEXT:    orl %ebp, %edi
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl %edi, {{[-0-9]+}}(%e{{[sb]}}p) # 4-byte Spill
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl %eax, %ecx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    shrl %cl, %ebx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl 28(%esp,%esi), %edi
 ; X86-NO-BMI2-NO-SHLD-NEXT:    leal (%edi,%edi), %ebp
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl %edx, %ecx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    shll %cl, %ebp
 ; X86-NO-BMI2-NO-SHLD-NEXT:    orl %ebx, %ebp
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl %eax, %ecx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    shrl %cl, %edi
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl 32(%esp,%esi), %eax
 ; X86-NO-BMI2-NO-SHLD-NEXT:    addl %eax, %eax
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl %edx, %ecx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    shll %cl, %eax
 ; X86-NO-BMI2-NO-SHLD-NEXT:    orl %edi, %eax
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %ecx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl %eax, 12(%ecx)
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl %ebp, 8(%ecx)
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl {{[-0-9]+}}(%e{{[sb]}}p), %eax # 4-byte Reload
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl %eax, 4(%ecx)
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl {{[-0-9]+}}(%e{{[sb]}}p), %eax # 4-byte Reload
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl %eax, (%ecx)
 ; X86-NO-BMI2-NO-SHLD-NEXT:    addl $156, %esp
 ; X86-NO-BMI2-NO-SHLD-NEXT:    popl %esi
 ; X86-NO-BMI2-NO-SHLD-NEXT:    popl %edi
 ; X86-NO-BMI2-NO-SHLD-NEXT:    popl %ebx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    popl %ebp
 ; X86-NO-BMI2-NO-SHLD-NEXT:    retl
 ;
 ; X86-SHLD-LABEL: load_16byte_chunk_of_64byte_alloca_with_zero_upper_half:
 ; X86-SHLD:       # %bb.0:
 ; X86-SHLD-NEXT:    pushl %ebp
 ; X86-SHLD-NEXT:    pushl %ebx
 ; X86-SHLD-NEXT:    pushl %edi
 ; X86-SHLD-NEXT:    pushl %esi
 ; X86-SHLD-NEXT:    subl $156, %esp
 ; X86-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %ecx
 ; X86-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %eax
 ; X86-SHLD-NEXT:    movups (%eax), %xmm0
 ; X86-SHLD-NEXT:    movups 16(%eax), %xmm1
 ; X86-SHLD-NEXT:    xorps %xmm2, %xmm2
 ; X86-SHLD-NEXT:    movaps %xmm2, {{[0-9]+}}(%esp)
 ; X86-SHLD-NEXT:    movaps %xmm2, {{[0-9]+}}(%esp)
 ; X86-SHLD-NEXT:    movaps %xmm2, {{[0-9]+}}(%esp)
 ; X86-SHLD-NEXT:    movaps %xmm2, {{[0-9]+}}(%esp)
 ; X86-SHLD-NEXT:    movaps %xmm2, {{[0-9]+}}(%esp)
 ; X86-SHLD-NEXT:    movaps %xmm2, {{[0-9]+}}(%esp)
 ; X86-SHLD-NEXT:    movaps %xmm1, {{[0-9]+}}(%esp)
 ; X86-SHLD-NEXT:    movaps %xmm0, {{[0-9]+}}(%esp)
 ; X86-SHLD-NEXT:    movl %ecx, %edi
 ; X86-SHLD-NEXT:    andl $60, %edi
 ; X86-SHLD-NEXT:    movl 24(%esp,%edi), %esi
 ; X86-SHLD-NEXT:    movl 16(%esp,%edi), %eax
 ; X86-SHLD-NEXT:    movl 20(%esp,%edi), %ebx
 ; X86-SHLD-NEXT:    movl %ebx, {{[-0-9]+}}(%e{{[sb]}}p) # 4-byte Spill
 ; X86-SHLD-NEXT:    shll $3, %ecx
 ; X86-SHLD-NEXT:    andl $24, %ecx
 ; X86-SHLD-NEXT:    shrdl %cl, %esi, %ebx
 ; X86-SHLD-NEXT:    movl 28(%esp,%edi), %ebp
 ; X86-SHLD-NEXT:    shrdl %cl, %ebp, %esi
 ; X86-SHLD-NEXT:    movl 32(%esp,%edi), %edi
 ; X86-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %edx
 ; X86-SHLD-NEXT:    shrdl %cl, %edi, %ebp
 ; X86-SHLD-NEXT:    movl %ebp, 12(%edx)
 ; X86-SHLD-NEXT:    movl %esi, 8(%edx)
 ; X86-SHLD-NEXT:    movl %ebx, 4(%edx)
 ; X86-SHLD-NEXT:    # kill: def $cl killed $cl killed $ecx
 ; X86-SHLD-NEXT:    movl {{[-0-9]+}}(%e{{[sb]}}p), %esi # 4-byte Reload
 ; X86-SHLD-NEXT:    shrdl %cl, %esi, %eax
 ; X86-SHLD-NEXT:    movl %eax, (%edx)
 ; X86-SHLD-NEXT:    addl $156, %esp
 ; X86-SHLD-NEXT:    popl %esi
 ; X86-SHLD-NEXT:    popl %edi
 ; X86-SHLD-NEXT:    popl %ebx
 ; X86-SHLD-NEXT:    popl %ebp
 ; X86-SHLD-NEXT:    retl
 ;
 ; X86-HAVE-BMI2-NO-SHLD-LABEL: load_16byte_chunk_of_64byte_alloca_with_zero_upper_half:
 ; X86-HAVE-BMI2-NO-SHLD:       # %bb.0:
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    pushl %ebp
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    pushl %ebx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    pushl %edi
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    pushl %esi
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    subl $156, %esp
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %eax
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %ecx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movups (%ecx), %xmm0
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movups 16(%ecx), %xmm1
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    xorps %xmm2, %xmm2
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movaps %xmm2, {{[0-9]+}}(%esp)
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movaps %xmm2, {{[0-9]+}}(%esp)
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movaps %xmm2, {{[0-9]+}}(%esp)
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movaps %xmm2, {{[0-9]+}}(%esp)
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movaps %xmm2, {{[0-9]+}}(%esp)
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movaps %xmm2, {{[0-9]+}}(%esp)
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movaps %xmm1, {{[0-9]+}}(%esp)
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movaps %xmm0, {{[0-9]+}}(%esp)
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    leal (,%eax,8), %ecx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    andl $24, %ecx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    andl $60, %eax
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    shrxl %ecx, 16(%esp,%eax), %esi
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movl 20(%esp,%eax), %edx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    shrxl %ecx, %edx, %edi
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movl %edi, {{[-0-9]+}}(%e{{[sb]}}p) # 4-byte Spill
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movl %ecx, %ebx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    notb %bl
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movl 24(%esp,%eax), %ebp
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    addl %edx, %edx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    shlxl %ebx, %edx, %edx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    orl %esi, %edx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    shrxl %ecx, %ebp, %edi
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    leal (%ebp,%ebp), %esi
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    shlxl %ebx, %esi, %esi
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    orl {{[-0-9]+}}(%e{{[sb]}}p), %esi # 4-byte Folded Reload
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movl 28(%esp,%eax), %ebp
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    shrxl %ecx, %ebp, %ecx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    addl %ebp, %ebp
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    shlxl %ebx, %ebp, %ebp
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    orl %edi, %ebp
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movl 32(%esp,%eax), %eax
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    addl %eax, %eax
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    shlxl %ebx, %eax, %eax
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    orl %ecx, %eax
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %ecx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movl %eax, 12(%ecx)
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movl %ebp, 8(%ecx)
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movl %esi, 4(%ecx)
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movl %edx, (%ecx)
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    addl $156, %esp
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    popl %esi
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    popl %edi
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    popl %ebx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    popl %ebp
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    retl
   %init = load <32 x i8>, ptr %src, align 1
   %intermediate.sroa.0.0.vec.expand = shufflevector <32 x i8> %init, <32 x i8> poison, <64 x i32> <i32 0, i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7, i32 8, i32 9, i32 10, i32 11, i32 12, i32 13, i32 14, i32 15, i32 16, i32 17, i32 18, i32 19, i32 20, i32 21, i32 22, i32 23, i32 24, i32 25, i32 26, i32 27, i32 28, i32 29, i32 30, i32 31, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef>
   %intermediate.sroa.0.0.vecblend = shufflevector <64 x i8> %intermediate.sroa.0.0.vec.expand, <64 x i8> <i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0>, <64 x i32> <i32 0, i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7, i32 8, i32 9, i32 10, i32 11, i32 12, i32 13, i32 14, i32 15, i32 16, i32 17, i32 18, i32 19, i32 20, i32 21, i32 22, i32 23, i32 24, i32 25, i32 26, i32 27, i32 28, i32 29, i32 30, i32 31, i32 96, i32 97, i32 98, i32 99, i32 100, i32 101, i32 102, i32 103, i32 104, i32 105, i32 106, i32 107, i32 108, i32 109, i32 110, i32 111, i32 112, i32 113, i32 114, i32 115, i32 116, i32 117, i32 118, i32 119, i32 120, i32 121, i32 122, i32 123, i32 124, i32 125, i32 126, i32 127>
   %byteOff.numbits = shl nuw nsw i64 %byteOff, 3
   %intermediate.val.frozen = freeze <64 x i8> %intermediate.sroa.0.0.vecblend
   %intermediate.val.frozen.bits = bitcast <64 x i8> %intermediate.val.frozen to i512
   %byteOff.numbits.wide = zext i64 %byteOff.numbits to i512
   %intermediate.val.frozen.bits.positioned = lshr i512 %intermediate.val.frozen.bits, %byteOff.numbits.wide
   %intermediate.val.frozen.bits.positioned.extracted = trunc i512 %intermediate.val.frozen.bits.positioned to i128
   store i128 %intermediate.val.frozen.bits.positioned.extracted, ptr %dst, align 16
   ret void
 }

 define void @load_32byte_chunk_of_64byte_alloca_with_zero_upper_half(ptr %src, i64 %byteOff, ptr %dst) nounwind {
 ; X64-NO-BMI2-NO-SHLD-LABEL: load_32byte_chunk_of_64byte_alloca_with_zero_upper_half:
 ; X64-NO-BMI2-NO-SHLD:       # %bb.0:
 ; X64-NO-BMI2-NO-SHLD-NEXT:    pushq %r14
 ; X64-NO-BMI2-NO-SHLD-NEXT:    pushq %rbx
 ; X64-NO-BMI2-NO-SHLD-NEXT:    pushq %rax
 ; X64-NO-BMI2-NO-SHLD-NEXT:    movups (%rdi), %xmm0
 ; X64-NO-BMI2-NO-SHLD-NEXT:    movups 16(%rdi), %xmm1
 ; X64-NO-BMI2-NO-SHLD-NEXT:    xorps %xmm2, %xmm2
 ; X64-NO-BMI2-NO-SHLD-NEXT:    movaps %xmm2, -{{[0-9]+}}(%rsp)
 ; X64-NO-BMI2-NO-SHLD-NEXT:    movaps %xmm2, -{{[0-9]+}}(%rsp)
 ; X64-NO-BMI2-NO-SHLD-NEXT:    movaps %xmm2, -{{[0-9]+}}(%rsp)
 ; X64-NO-BMI2-NO-SHLD-NEXT:    movaps %xmm2, -{{[0-9]+}}(%rsp)
 ; X64-NO-BMI2-NO-SHLD-NEXT:    movaps %xmm2, -{{[0-9]+}}(%rsp)
 ; X64-NO-BMI2-NO-SHLD-NEXT:    movaps %xmm2, -{{[0-9]+}}(%rsp)
 ; X64-NO-BMI2-NO-SHLD-NEXT:    movaps %xmm1, -{{[0-9]+}}(%rsp)
 ; X64-NO-BMI2-NO-SHLD-NEXT:    movaps %xmm0, -{{[0-9]+}}(%rsp)
 ; X64-NO-BMI2-NO-SHLD-NEXT:    leal (,%rsi,8), %eax
 ; X64-NO-BMI2-NO-SHLD-NEXT:    movl %eax, %edi
 ; X64-NO-BMI2-NO-SHLD-NEXT:    andl $56, %edi
 ; X64-NO-BMI2-NO-SHLD-NEXT:    andl $56, %esi
 ; X64-NO-BMI2-NO-SHLD-NEXT:    movq -128(%rsp,%rsi), %r10
 ; X64-NO-BMI2-NO-SHLD-NEXT:    movq -120(%rsp,%rsi), %r11
 ; X64-NO-BMI2-NO-SHLD-NEXT:    movl %edi, %ecx
 ; X64-NO-BMI2-NO-SHLD-NEXT:    shrq %cl, %r10
 ; X64-NO-BMI2-NO-SHLD-NEXT:    movl %edi, %r8d
 ; X64-NO-BMI2-NO-SHLD-NEXT:    notb %r8b
 ; X64-NO-BMI2-NO-SHLD-NEXT:    leaq (%r11,%r11), %r9
 ; X64-NO-BMI2-NO-SHLD-NEXT:    movl %r8d, %ecx
 ; X64-NO-BMI2-NO-SHLD-NEXT:    shlq %cl, %r9
 ; X64-NO-BMI2-NO-SHLD-NEXT:    orq %r10, %r9
 ; X64-NO-BMI2-NO-SHLD-NEXT:    movl %edi, %ecx
 ; X64-NO-BMI2-NO-SHLD-NEXT:    shrq %cl, %r11
 ; X64-NO-BMI2-NO-SHLD-NEXT:    notl %eax
 ; X64-NO-BMI2-NO-SHLD-NEXT:    andl $63, %eax
 ; X64-NO-BMI2-NO-SHLD-NEXT:    movq -112(%rsp,%rsi), %r10
 ; X64-NO-BMI2-NO-SHLD-NEXT:    leaq (%r10,%r10), %rbx
 ; X64-NO-BMI2-NO-SHLD-NEXT:    movl %eax, %ecx
 ; X64-NO-BMI2-NO-SHLD-NEXT:    shlq %cl, %rbx
 ; X64-NO-BMI2-NO-SHLD-NEXT:    orq %r11, %rbx
 ; X64-NO-BMI2-NO-SHLD-NEXT:    movl %edi, %ecx
 ; X64-NO-BMI2-NO-SHLD-NEXT:    shrq %cl, %r10
 ; X64-NO-BMI2-NO-SHLD-NEXT:    movq -104(%rsp,%rsi), %r11
 ; X64-NO-BMI2-NO-SHLD-NEXT:    leaq (%r11,%r11), %r14
 ; X64-NO-BMI2-NO-SHLD-NEXT:    movl %r8d, %ecx
 ; X64-NO-BMI2-NO-SHLD-NEXT:    shlq %cl, %r14
 ; X64-NO-BMI2-NO-SHLD-NEXT:    orq %r10, %r14
 ; X64-NO-BMI2-NO-SHLD-NEXT:    movl %edi, %ecx
 ; X64-NO-BMI2-NO-SHLD-NEXT:    shrq %cl, %r11
 ; X64-NO-BMI2-NO-SHLD-NEXT:    movq -96(%rsp,%rsi), %rsi
 ; X64-NO-BMI2-NO-SHLD-NEXT:    addq %rsi, %rsi
 ; X64-NO-BMI2-NO-SHLD-NEXT:    movl %eax, %ecx
 ; X64-NO-BMI2-NO-SHLD-NEXT:    shlq %cl, %rsi
 ; X64-NO-BMI2-NO-SHLD-NEXT:    orq %r11, %rsi
 ; X64-NO-BMI2-NO-SHLD-NEXT:    movq %rsi, 24(%rdx)
 ; X64-NO-BMI2-NO-SHLD-NEXT:    movq %r14, 16(%rdx)
 ; X64-NO-BMI2-NO-SHLD-NEXT:    movq %rbx, 8(%rdx)
 ; X64-NO-BMI2-NO-SHLD-NEXT:    movq %r9, (%rdx)
 ; X64-NO-BMI2-NO-SHLD-NEXT:    addq $8, %rsp
 ; X64-NO-BMI2-NO-SHLD-NEXT:    popq %rbx
 ; X64-NO-BMI2-NO-SHLD-NEXT:    popq %r14
 ; X64-NO-BMI2-NO-SHLD-NEXT:    retq
 ;
 ; X64-NO-BMI2-HAVE-SHLD-LABEL: load_32byte_chunk_of_64byte_alloca_with_zero_upper_half:
 ; X64-NO-BMI2-HAVE-SHLD:       # %bb.0:
 ; X64-NO-BMI2-HAVE-SHLD-NEXT:    pushq %r14
 ; X64-NO-BMI2-HAVE-SHLD-NEXT:    pushq %rbx
 ; X64-NO-BMI2-HAVE-SHLD-NEXT:    pushq %rax
 ; X64-NO-BMI2-HAVE-SHLD-NEXT:    movups (%rdi), %xmm0
 ; X64-NO-BMI2-HAVE-SHLD-NEXT:    movups 16(%rdi), %xmm1
 ; X64-NO-BMI2-HAVE-SHLD-NEXT:    xorps %xmm2, %xmm2
 ; X64-NO-BMI2-HAVE-SHLD-NEXT:    movaps %xmm2, -{{[0-9]+}}(%rsp)
 ; X64-NO-BMI2-HAVE-SHLD-NEXT:    movaps %xmm2, -{{[0-9]+}}(%rsp)
 ; X64-NO-BMI2-HAVE-SHLD-NEXT:    movaps %xmm2, -{{[0-9]+}}(%rsp)
 ; X64-NO-BMI2-HAVE-SHLD-NEXT:    movaps %xmm2, -{{[0-9]+}}(%rsp)
 ; X64-NO-BMI2-HAVE-SHLD-NEXT:    movaps %xmm2, -{{[0-9]+}}(%rsp)
 ; X64-NO-BMI2-HAVE-SHLD-NEXT:    movaps %xmm2, -{{[0-9]+}}(%rsp)
 ; X64-NO-BMI2-HAVE-SHLD-NEXT:    movaps %xmm1, -{{[0-9]+}}(%rsp)
 ; X64-NO-BMI2-HAVE-SHLD-NEXT:    movaps %xmm0, -{{[0-9]+}}(%rsp)
 ; X64-NO-BMI2-HAVE-SHLD-NEXT:    leal (,%rsi,8), %edi
 ; X64-NO-BMI2-HAVE-SHLD-NEXT:    movl %edi, %eax
 ; X64-NO-BMI2-HAVE-SHLD-NEXT:    andl $56, %eax
 ; X64-NO-BMI2-HAVE-SHLD-NEXT:    andl $56, %esi
 ; X64-NO-BMI2-HAVE-SHLD-NEXT:    movq -128(%rsp,%rsi), %r8
 ; X64-NO-BMI2-HAVE-SHLD-NEXT:    movq -120(%rsp,%rsi), %r9
 ; X64-NO-BMI2-HAVE-SHLD-NEXT:    movq %r9, %r10
 ; X64-NO-BMI2-HAVE-SHLD-NEXT:    movl %eax, %ecx
 ; X64-NO-BMI2-HAVE-SHLD-NEXT:    shrq %cl, %r10
 ; X64-NO-BMI2-HAVE-SHLD-NEXT:    notl %edi
 ; X64-NO-BMI2-HAVE-SHLD-NEXT:    andl $63, %edi
 ; X64-NO-BMI2-HAVE-SHLD-NEXT:    movq -112(%rsp,%rsi), %r11
 ; X64-NO-BMI2-HAVE-SHLD-NEXT:    leaq (%r11,%r11), %rbx
 ; X64-NO-BMI2-HAVE-SHLD-NEXT:    movl %edi, %ecx
 ; X64-NO-BMI2-HAVE-SHLD-NEXT:    shlq %cl, %rbx
 ; X64-NO-BMI2-HAVE-SHLD-NEXT:    orq %r10, %rbx
 ; X64-NO-BMI2-HAVE-SHLD-NEXT:    movq -104(%rsp,%rsi), %r10
 ; X64-NO-BMI2-HAVE-SHLD-NEXT:    movq %r10, %r14
 ; X64-NO-BMI2-HAVE-SHLD-NEXT:    movl %eax, %ecx
 ; X64-NO-BMI2-HAVE-SHLD-NEXT:    shrq %cl, %r14
 ; X64-NO-BMI2-HAVE-SHLD-NEXT:    movq -96(%rsp,%rsi), %rsi
 ; X64-NO-BMI2-HAVE-SHLD-NEXT:    addq %rsi, %rsi
 ; X64-NO-BMI2-HAVE-SHLD-NEXT:    movl %edi, %ecx
 ; X64-NO-BMI2-HAVE-SHLD-NEXT:    shlq %cl, %rsi
 ; X64-NO-BMI2-HAVE-SHLD-NEXT:    orq %r14, %rsi
 ; X64-NO-BMI2-HAVE-SHLD-NEXT:    movl %eax, %ecx
 ; X64-NO-BMI2-HAVE-SHLD-NEXT:    shrdq %cl, %r10, %r11
 ; X64-NO-BMI2-HAVE-SHLD-NEXT:    shrdq %cl, %r9, %r8
 ; X64-NO-BMI2-HAVE-SHLD-NEXT:    movq %r11, 16(%rdx)
 ; X64-NO-BMI2-HAVE-SHLD-NEXT:    movq %r8, (%rdx)
 ; X64-NO-BMI2-HAVE-SHLD-NEXT:    movq %rsi, 24(%rdx)
 ; X64-NO-BMI2-HAVE-SHLD-NEXT:    movq %rbx, 8(%rdx)
 ; X64-NO-BMI2-HAVE-SHLD-NEXT:    addq $8, %rsp
 ; X64-NO-BMI2-HAVE-SHLD-NEXT:    popq %rbx
 ; X64-NO-BMI2-HAVE-SHLD-NEXT:    popq %r14
 ; X64-NO-BMI2-HAVE-SHLD-NEXT:    retq
 ;
 ; X64-HAVE-BMI2-NO-SHLD-LABEL: load_32byte_chunk_of_64byte_alloca_with_zero_upper_half:
 ; X64-HAVE-BMI2-NO-SHLD:       # %bb.0:
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    pushq %r14
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    pushq %rbx
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    pushq %rax
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    movups (%rdi), %xmm0
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    movups 16(%rdi), %xmm1
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    xorps %xmm2, %xmm2
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    movaps %xmm2, -{{[0-9]+}}(%rsp)
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    movaps %xmm2, -{{[0-9]+}}(%rsp)
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    movaps %xmm2, -{{[0-9]+}}(%rsp)
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    movaps %xmm2, -{{[0-9]+}}(%rsp)
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    movaps %xmm2, -{{[0-9]+}}(%rsp)
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    movaps %xmm2, -{{[0-9]+}}(%rsp)
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    movaps %xmm1, -{{[0-9]+}}(%rsp)
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    movaps %xmm0, -{{[0-9]+}}(%rsp)
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    leal (,%rsi,8), %eax
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    movl %eax, %ecx
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    andl $56, %ecx
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    andl $56, %esi
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    shrxq %rcx, -128(%rsp,%rsi), %rdi
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    movq -120(%rsp,%rsi), %r8
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    movq -112(%rsp,%rsi), %r9
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    shrxq %rcx, %r8, %r10
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    shrxq %rcx, %r9, %r11
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    movq -104(%rsp,%rsi), %rbx
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    shrxq %rcx, %rbx, %r14
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    # kill: def $cl killed $cl killed $rcx def $rcx
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    notb %cl
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    addq %r8, %r8
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    shlxq %rcx, %r8, %r8
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    orq %rdi, %r8
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    notl %eax
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    andl $63, %eax
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    leaq (%r9,%r9), %rdi
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    shlxq %rax, %rdi, %rdi
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    orq %r10, %rdi
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    leaq (%rbx,%rbx), %r9
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    shlxq %rcx, %r9, %rcx
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    orq %r11, %rcx
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    movq -96(%rsp,%rsi), %rsi
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    addq %rsi, %rsi
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    shlxq %rax, %rsi, %rax
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    orq %r14, %rax
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    movq %rax, 24(%rdx)
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    movq %rcx, 16(%rdx)
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    movq %rdi, 8(%rdx)
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    movq %r8, (%rdx)
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    addq $8, %rsp
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    popq %rbx
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    popq %r14
 ; X64-HAVE-BMI2-NO-SHLD-NEXT:    retq
 ;
 ; X64-HAVE-BMI2-HAVE-SHLD-LABEL: load_32byte_chunk_of_64byte_alloca_with_zero_upper_half:
 ; X64-HAVE-BMI2-HAVE-SHLD:       # %bb.0:
 ; X64-HAVE-BMI2-HAVE-SHLD-NEXT:    pushq %rbx
 ; X64-HAVE-BMI2-HAVE-SHLD-NEXT:    movups (%rdi), %xmm0
 ; X64-HAVE-BMI2-HAVE-SHLD-NEXT:    movups 16(%rdi), %xmm1
 ; X64-HAVE-BMI2-HAVE-SHLD-NEXT:    xorps %xmm2, %xmm2
 ; X64-HAVE-BMI2-HAVE-SHLD-NEXT:    movaps %xmm2, -{{[0-9]+}}(%rsp)
 ; X64-HAVE-BMI2-HAVE-SHLD-NEXT:    movaps %xmm2, -{{[0-9]+}}(%rsp)
 ; X64-HAVE-BMI2-HAVE-SHLD-NEXT:    movaps %xmm2, -{{[0-9]+}}(%rsp)
 ; X64-HAVE-BMI2-HAVE-SHLD-NEXT:    movaps %xmm2, -{{[0-9]+}}(%rsp)
 ; X64-HAVE-BMI2-HAVE-SHLD-NEXT:    movaps %xmm2, -{{[0-9]+}}(%rsp)
 ; X64-HAVE-BMI2-HAVE-SHLD-NEXT:    movaps %xmm2, -{{[0-9]+}}(%rsp)
 ; X64-HAVE-BMI2-HAVE-SHLD-NEXT:    movaps %xmm1, -{{[0-9]+}}(%rsp)
 ; X64-HAVE-BMI2-HAVE-SHLD-NEXT:    movaps %xmm0, -{{[0-9]+}}(%rsp)
 ; X64-HAVE-BMI2-HAVE-SHLD-NEXT:    leal (,%rsi,8), %eax
 ; X64-HAVE-BMI2-HAVE-SHLD-NEXT:    movl %eax, %ecx
 ; X64-HAVE-BMI2-HAVE-SHLD-NEXT:    andl $56, %ecx
 ; X64-HAVE-BMI2-HAVE-SHLD-NEXT:    andl $56, %esi
 ; X64-HAVE-BMI2-HAVE-SHLD-NEXT:    movq -128(%rsp,%rsi), %rdi
 ; X64-HAVE-BMI2-HAVE-SHLD-NEXT:    movq -120(%rsp,%rsi), %r8
 ; X64-HAVE-BMI2-HAVE-SHLD-NEXT:    shrxq %rcx, %r8, %r9
 ; X64-HAVE-BMI2-HAVE-SHLD-NEXT:    notl %eax
 ; X64-HAVE-BMI2-HAVE-SHLD-NEXT:    andl $63, %eax
 ; X64-HAVE-BMI2-HAVE-SHLD-NEXT:    movq -112(%rsp,%rsi), %r10
 ; X64-HAVE-BMI2-HAVE-SHLD-NEXT:    leaq (%r10,%r10), %r11
 ; X64-HAVE-BMI2-HAVE-SHLD-NEXT:    shlxq %rax, %r11, %r11
 ; X64-HAVE-BMI2-HAVE-SHLD-NEXT:    orq %r9, %r11
 ; X64-HAVE-BMI2-HAVE-SHLD-NEXT:    movq -104(%rsp,%rsi), %r9
 ; X64-HAVE-BMI2-HAVE-SHLD-NEXT:    shrxq %rcx, %r9, %rbx
 ; X64-HAVE-BMI2-HAVE-SHLD-NEXT:    movq -96(%rsp,%rsi), %rsi
 ; X64-HAVE-BMI2-HAVE-SHLD-NEXT:    addq %rsi, %rsi
 ; X64-HAVE-BMI2-HAVE-SHLD-NEXT:    shlxq %rax, %rsi, %rax
 ; X64-HAVE-BMI2-HAVE-SHLD-NEXT:    orq %rbx, %rax
 ; X64-HAVE-BMI2-HAVE-SHLD-NEXT:    shrdq %cl, %r9, %r10
 ; X64-HAVE-BMI2-HAVE-SHLD-NEXT:    # kill: def $cl killed $cl killed $rcx
 ; X64-HAVE-BMI2-HAVE-SHLD-NEXT:    shrdq %cl, %r8, %rdi
 ; X64-HAVE-BMI2-HAVE-SHLD-NEXT:    movq %r10, 16(%rdx)
 ; X64-HAVE-BMI2-HAVE-SHLD-NEXT:    movq %rdi, (%rdx)
 ; X64-HAVE-BMI2-HAVE-SHLD-NEXT:    movq %rax, 24(%rdx)
 ; X64-HAVE-BMI2-HAVE-SHLD-NEXT:    movq %r11, 8(%rdx)
 ; X64-HAVE-BMI2-HAVE-SHLD-NEXT:    popq %rbx
 ; X64-HAVE-BMI2-HAVE-SHLD-NEXT:    retq
 ;
 ; X86-NO-BMI2-NO-SHLD-LABEL: load_32byte_chunk_of_64byte_alloca_with_zero_upper_half:
 ; X86-NO-BMI2-NO-SHLD:       # %bb.0:
 ; X86-NO-BMI2-NO-SHLD-NEXT:    pushl %ebp
 ; X86-NO-BMI2-NO-SHLD-NEXT:    pushl %ebx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    pushl %edi
 ; X86-NO-BMI2-NO-SHLD-NEXT:    pushl %esi
 ; X86-NO-BMI2-NO-SHLD-NEXT:    subl $172, %esp
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %eax
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %ecx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movups (%ecx), %xmm0
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movups 16(%ecx), %xmm1
 ; X86-NO-BMI2-NO-SHLD-NEXT:    xorps %xmm2, %xmm2
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movaps %xmm2, {{[0-9]+}}(%esp)
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movaps %xmm2, {{[0-9]+}}(%esp)
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movaps %xmm2, {{[0-9]+}}(%esp)
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movaps %xmm2, {{[0-9]+}}(%esp)
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movaps %xmm2, {{[0-9]+}}(%esp)
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movaps %xmm2, {{[0-9]+}}(%esp)
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movaps %xmm1, {{[0-9]+}}(%esp)
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movaps %xmm0, {{[0-9]+}}(%esp)
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl %eax, %edi
 ; X86-NO-BMI2-NO-SHLD-NEXT:    andl $60, %edi
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl 32(%esp,%edi), %ebx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl 36(%esp,%edi), %esi
 ; X86-NO-BMI2-NO-SHLD-NEXT:    shll $3, %eax
 ; X86-NO-BMI2-NO-SHLD-NEXT:    andl $24, %eax
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl %eax, %ecx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    shrl %cl, %ebx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    leal (%esi,%esi), %ebp
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl %eax, %edx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    notb %dl
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl %edx, %ecx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    shll %cl, %ebp
 ; X86-NO-BMI2-NO-SHLD-NEXT:    orl %ebx, %ebp
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl %ebp, {{[-0-9]+}}(%e{{[sb]}}p) # 4-byte Spill
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl %eax, %ecx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    shrl %cl, %esi
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl 40(%esp,%edi), %ebx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    leal (%ebx,%ebx), %ebp
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl %edx, %ecx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    shll %cl, %ebp
 ; X86-NO-BMI2-NO-SHLD-NEXT:    orl %esi, %ebp
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl %ebp, {{[-0-9]+}}(%e{{[sb]}}p) # 4-byte Spill
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl %eax, %ecx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    shrl %cl, %ebx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl 44(%esp,%edi), %esi
 ; X86-NO-BMI2-NO-SHLD-NEXT:    leal (%esi,%esi), %ebp
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl %edx, %ecx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    shll %cl, %ebp
 ; X86-NO-BMI2-NO-SHLD-NEXT:    orl %ebx, %ebp
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl %ebp, {{[-0-9]+}}(%e{{[sb]}}p) # 4-byte Spill
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl %eax, %ecx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    shrl %cl, %esi
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl 48(%esp,%edi), %ebx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    leal (%ebx,%ebx), %ebp
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl %edx, %ecx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    shll %cl, %ebp
 ; X86-NO-BMI2-NO-SHLD-NEXT:    orl %esi, %ebp
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl %ebp, {{[-0-9]+}}(%e{{[sb]}}p) # 4-byte Spill
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl %eax, %ecx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    shrl %cl, %ebx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl 52(%esp,%edi), %esi
 ; X86-NO-BMI2-NO-SHLD-NEXT:    leal (%esi,%esi), %ebp
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl %edx, %ecx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    shll %cl, %ebp
 ; X86-NO-BMI2-NO-SHLD-NEXT:    orl %ebx, %ebp
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl %ebp, {{[-0-9]+}}(%e{{[sb]}}p) # 4-byte Spill
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl %eax, %ecx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    shrl %cl, %esi
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl 56(%esp,%edi), %ebp
 ; X86-NO-BMI2-NO-SHLD-NEXT:    leal (%ebp,%ebp), %ebx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl %edx, %ecx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    shll %cl, %ebx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    orl %esi, %ebx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl %ebx, {{[-0-9]+}}(%e{{[sb]}}p) # 4-byte Spill
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl %eax, %ecx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    shrl %cl, %ebp
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl 60(%esp,%edi), %ebx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    leal (%ebx,%ebx), %esi
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl %edx, %ecx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    shll %cl, %esi
 ; X86-NO-BMI2-NO-SHLD-NEXT:    orl %ebp, %esi
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl %eax, %ecx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    shrl %cl, %ebx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl 64(%esp,%edi), %eax
 ; X86-NO-BMI2-NO-SHLD-NEXT:    addl %eax, %eax
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl %edx, %ecx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    shll %cl, %eax
 ; X86-NO-BMI2-NO-SHLD-NEXT:    orl %ebx, %eax
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %ecx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl %eax, 28(%ecx)
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl %esi, 24(%ecx)
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl {{[-0-9]+}}(%e{{[sb]}}p), %eax # 4-byte Reload
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl %eax, 20(%ecx)
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl {{[-0-9]+}}(%e{{[sb]}}p), %eax # 4-byte Reload
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl %eax, 16(%ecx)
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl {{[-0-9]+}}(%e{{[sb]}}p), %eax # 4-byte Reload
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl %eax, 12(%ecx)
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl {{[-0-9]+}}(%e{{[sb]}}p), %eax # 4-byte Reload
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl %eax, 8(%ecx)
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl {{[-0-9]+}}(%e{{[sb]}}p), %eax # 4-byte Reload
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl %eax, 4(%ecx)
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl {{[-0-9]+}}(%e{{[sb]}}p), %eax # 4-byte Reload
 ; X86-NO-BMI2-NO-SHLD-NEXT:    movl %eax, (%ecx)
 ; X86-NO-BMI2-NO-SHLD-NEXT:    addl $172, %esp
 ; X86-NO-BMI2-NO-SHLD-NEXT:    popl %esi
 ; X86-NO-BMI2-NO-SHLD-NEXT:    popl %edi
 ; X86-NO-BMI2-NO-SHLD-NEXT:    popl %ebx
 ; X86-NO-BMI2-NO-SHLD-NEXT:    popl %ebp
 ; X86-NO-BMI2-NO-SHLD-NEXT:    retl
 ;
 ; X86-SHLD-LABEL: load_32byte_chunk_of_64byte_alloca_with_zero_upper_half:
 ; X86-SHLD:       # %bb.0:
 ; X86-SHLD-NEXT:    pushl %ebp
 ; X86-SHLD-NEXT:    pushl %ebx
 ; X86-SHLD-NEXT:    pushl %edi
 ; X86-SHLD-NEXT:    pushl %esi
 ; X86-SHLD-NEXT:    subl $156, %esp
 ; X86-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %ecx
 ; X86-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %eax
 ; X86-SHLD-NEXT:    movups (%eax), %xmm0
 ; X86-SHLD-NEXT:    movups 16(%eax), %xmm1
 ; X86-SHLD-NEXT:    xorps %xmm2, %xmm2
 ; X86-SHLD-NEXT:    movaps %xmm2, {{[0-9]+}}(%esp)
 ; X86-SHLD-NEXT:    movaps %xmm2, {{[0-9]+}}(%esp)
 ; X86-SHLD-NEXT:    movaps %xmm2, {{[0-9]+}}(%esp)
 ; X86-SHLD-NEXT:    movaps %xmm2, {{[0-9]+}}(%esp)
 ; X86-SHLD-NEXT:    movaps %xmm2, {{[0-9]+}}(%esp)
 ; X86-SHLD-NEXT:    movaps %xmm2, {{[0-9]+}}(%esp)
 ; X86-SHLD-NEXT:    movaps %xmm1, {{[0-9]+}}(%esp)
 ; X86-SHLD-NEXT:    movaps %xmm0, {{[0-9]+}}(%esp)
 ; X86-SHLD-NEXT:    movl %ecx, %edi
 ; X86-SHLD-NEXT:    andl $60, %edi
 ; X86-SHLD-NEXT:    movl 24(%esp,%edi), %edx
 ; X86-SHLD-NEXT:    movl 20(%esp,%edi), %esi
 ; X86-SHLD-NEXT:    movl %esi, {{[-0-9]+}}(%e{{[sb]}}p) # 4-byte Spill
 ; X86-SHLD-NEXT:    shll $3, %ecx
 ; X86-SHLD-NEXT:    andl $24, %ecx
 ; X86-SHLD-NEXT:    movl %edx, %eax
 ; X86-SHLD-NEXT:    shrdl %cl, %edx, %esi
 ; X86-SHLD-NEXT:    movl %esi, {{[-0-9]+}}(%e{{[sb]}}p) # 4-byte Spill
 ; X86-SHLD-NEXT:    movl 28(%esp,%edi), %edx
 ; X86-SHLD-NEXT:    shrdl %cl, %edx, %eax
 ; X86-SHLD-NEXT:    movl %eax, {{[-0-9]+}}(%e{{[sb]}}p) # 4-byte Spill
 ; X86-SHLD-NEXT:    movl 32(%esp,%edi), %ebp
 ; X86-SHLD-NEXT:    shrdl %cl, %ebp, %edx
 ; X86-SHLD-NEXT:    movl %edx, (%esp) # 4-byte Spill
 ; X86-SHLD-NEXT:    movl 36(%esp,%edi), %esi
 ; X86-SHLD-NEXT:    shrdl %cl, %esi, %ebp
 ; X86-SHLD-NEXT:    movl 40(%esp,%edi), %edx
 ; X86-SHLD-NEXT:    shrdl %cl, %edx, %esi
 ; X86-SHLD-NEXT:    movl 44(%esp,%edi), %eax
 ; X86-SHLD-NEXT:    shrdl %cl, %eax, %edx
 ; X86-SHLD-NEXT:    movl 16(%esp,%edi), %ebx
 ; X86-SHLD-NEXT:    movl 48(%esp,%edi), %edi
 ; X86-SHLD-NEXT:    shrdl %cl, %edi, %eax
 ; X86-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %edi
 ; X86-SHLD-NEXT:    movl %eax, 28(%edi)
 ; X86-SHLD-NEXT:    movl %edx, 24(%edi)
 ; X86-SHLD-NEXT:    movl %esi, 20(%edi)
 ; X86-SHLD-NEXT:    movl %ebp, 16(%edi)
 ; X86-SHLD-NEXT:    movl (%esp), %eax # 4-byte Reload
 ; X86-SHLD-NEXT:    movl %eax, 12(%edi)
 ; X86-SHLD-NEXT:    movl {{[-0-9]+}}(%e{{[sb]}}p), %eax # 4-byte Reload
 ; X86-SHLD-NEXT:    movl %eax, 8(%edi)
 ; X86-SHLD-NEXT:    movl {{[-0-9]+}}(%e{{[sb]}}p), %eax # 4-byte Reload
 ; X86-SHLD-NEXT:    movl %eax, 4(%edi)
 ; X86-SHLD-NEXT:    # kill: def $cl killed $cl killed $ecx
 ; X86-SHLD-NEXT:    movl {{[-0-9]+}}(%e{{[sb]}}p), %eax # 4-byte Reload
 ; X86-SHLD-NEXT:    shrdl %cl, %eax, %ebx
 ; X86-SHLD-NEXT:    movl %ebx, (%edi)
 ; X86-SHLD-NEXT:    addl $156, %esp
 ; X86-SHLD-NEXT:    popl %esi
 ; X86-SHLD-NEXT:    popl %edi
 ; X86-SHLD-NEXT:    popl %ebx
 ; X86-SHLD-NEXT:    popl %ebp
 ; X86-SHLD-NEXT:    retl
 ;
 ; X86-HAVE-BMI2-NO-SHLD-LABEL: load_32byte_chunk_of_64byte_alloca_with_zero_upper_half:
 ; X86-HAVE-BMI2-NO-SHLD:       # %bb.0:
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    pushl %ebp
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    pushl %ebx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    pushl %edi
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    pushl %esi
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    subl $156, %esp
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %eax
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %ecx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movups (%ecx), %xmm0
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movups 16(%ecx), %xmm1
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    xorps %xmm2, %xmm2
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movaps %xmm2, {{[0-9]+}}(%esp)
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movaps %xmm2, {{[0-9]+}}(%esp)
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movaps %xmm2, {{[0-9]+}}(%esp)
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movaps %xmm2, {{[0-9]+}}(%esp)
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movaps %xmm2, {{[0-9]+}}(%esp)
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movaps %xmm2, {{[0-9]+}}(%esp)
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movaps %xmm1, {{[0-9]+}}(%esp)
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movaps %xmm0, {{[0-9]+}}(%esp)
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    leal (,%eax,8), %ecx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    andl $24, %ecx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    andl $60, %eax
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    shrxl %ecx, 16(%esp,%eax), %edx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movl 20(%esp,%eax), %esi
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    shrxl %ecx, %esi, %edi
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movl %ecx, %ebx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    notb %bl
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movl 24(%esp,%eax), %ebp
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    addl %esi, %esi
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    shlxl %ebx, %esi, %esi
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    orl %edx, %esi
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movl %esi, {{[-0-9]+}}(%e{{[sb]}}p) # 4-byte Spill
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    shrxl %ecx, %ebp, %edx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    leal (%ebp,%ebp), %esi
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    shlxl %ebx, %esi, %esi
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    orl %edi, %esi
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movl %esi, {{[-0-9]+}}(%e{{[sb]}}p) # 4-byte Spill
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movl 28(%esp,%eax), %esi
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    leal (%esi,%esi), %edi
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    shlxl %ebx, %edi, %edi
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    orl %edx, %edi
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movl %edi, {{[-0-9]+}}(%e{{[sb]}}p) # 4-byte Spill
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    shrxl %ecx, %esi, %edx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movl 32(%esp,%eax), %esi
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    leal (%esi,%esi), %ebp
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    shlxl %ebx, %ebp, %edi
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    orl %edx, %edi
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movl %edi, (%esp) # 4-byte Spill
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    shrxl %ecx, %esi, %ebp
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movl 36(%esp,%eax), %edx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    leal (%edx,%edx), %esi
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    shlxl %ebx, %esi, %edi
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    orl %ebp, %edi
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    shrxl %ecx, %edx, %ebp
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movl 40(%esp,%eax), %edx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    leal (%edx,%edx), %esi
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    shlxl %ebx, %esi, %esi
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    orl %ebp, %esi
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    shrxl %ecx, %edx, %edx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movl 44(%esp,%eax), %ebp
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    shrxl %ecx, %ebp, %ecx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    addl %ebp, %ebp
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    shlxl %ebx, %ebp, %ebp
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    orl %edx, %ebp
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movl 48(%esp,%eax), %eax
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    addl %eax, %eax
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    shlxl %ebx, %eax, %eax
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    orl %ecx, %eax
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movl {{[0-9]+}}(%esp), %ecx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movl %eax, 28(%ecx)
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movl %ebp, 24(%ecx)
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movl %esi, 20(%ecx)
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movl %edi, 16(%ecx)
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movl (%esp), %eax # 4-byte Reload
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movl %eax, 12(%ecx)
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movl {{[-0-9]+}}(%e{{[sb]}}p), %eax # 4-byte Reload
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movl %eax, 8(%ecx)
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movl {{[-0-9]+}}(%e{{[sb]}}p), %eax # 4-byte Reload
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movl %eax, 4(%ecx)
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movl {{[-0-9]+}}(%e{{[sb]}}p), %eax # 4-byte Reload
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    movl %eax, (%ecx)
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    addl $156, %esp
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    popl %esi
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    popl %edi
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    popl %ebx
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    popl %ebp
 ; X86-HAVE-BMI2-NO-SHLD-NEXT:    retl
   %init = load <32 x i8>, ptr %src, align 1
   %intermediate.sroa.0.0.vec.expand = shufflevector <32 x i8> %init, <32 x i8> poison, <64 x i32> <i32 0, i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7, i32 8, i32 9, i32 10, i32 11, i32 12, i32 13, i32 14, i32 15, i32 16, i32 17, i32 18, i32 19, i32 20, i32 21, i32 22, i32 23, i32 24, i32 25, i32 26, i32 27, i32 28, i32 29, i32 30, i32 31, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef>
   %intermediate.sroa.0.0.vecblend = shufflevector <64 x i8> %intermediate.sroa.0.0.vec.expand, <64 x i8> <i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 poison, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0>, <64 x i32> <i32 0, i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7, i32 8, i32 9, i32 10, i32 11, i32 12, i32 13, i32 14, i32 15, i32 16, i32 17, i32 18, i32 19, i32 20, i32 21, i32 22, i32 23, i32 24, i32 25, i32 26, i32 27, i32 28, i32 29, i32 30, i32 31, i32 96, i32 97, i32 98, i32 99, i32 100, i32 101, i32 102, i32 103, i32 104, i32 105, i32 106, i32 107, i32 108, i32 109, i32 110, i32 111, i32 112, i32 113, i32 114, i32 115, i32 116, i32 117, i32 118, i32 119, i32 120, i32 121, i32 122, i32 123, i32 124, i32 125, i32 126, i32 127>
   %byteOff.numbits = shl nuw nsw i64 %byteOff, 3
   %intermediate.val.frozen = freeze <64 x i8> %intermediate.sroa.0.0.vecblend
   %intermediate.val.frozen.bits = bitcast <64 x i8> %intermediate.val.frozen to i512
   %byteOff.numbits.wide = zext i64 %byteOff.numbits to i512
   %intermediate.val.frozen.bits.positioned = lshr i512 %intermediate.val.frozen.bits, %byteOff.numbits.wide
   %intermediate.val.frozen.bits.positioned.extracted = trunc i512 %intermediate.val.frozen.bits.positioned to i256
   store i256 %intermediate.val.frozen.bits.positioned.extracted, ptr %dst, align 32
   ret void
 }
 ;; NOTE: These prefixes are unused and the list is autogenerated. Do not add tests below this line:
 ; ALL: {{.*}}
 ; X64: {{.*}}
 ; X64-NO-SHLD: {{.*}}
 ; X86: {{.*}}
 ; X86-HAVE-BMI2-HAVE-SHLD: {{.*}}
 ; X86-NO-BMI2-HAVE-SHLD: {{.*}}
 ; X86-NO-SHLD: {{.*}}