; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc < %s -mtriple=i686-unknown | FileCheck %s --check-prefix=X86
; RUN: llc < %s -mtriple=x86_64-unknown | FileCheck %s --check-prefix=X64

; These tests just check that the plumbing is in place for @llvm.bitreverse. The
; actual output is massive at the moment as llvm.bitreverse is not yet legal.

declare <2 x i16> @llvm.bitreverse.v2i16(<2 x i16>) readnone

define <2 x i16> @test_bitreverse_v2i16(<2 x i16> %a) nounwind {
; X86-LABEL: test_bitreverse_v2i16:
; X86:       # %bb.0:
; X86-NEXT:    movzwl {{[0-9]+}}(%esp), %ecx
; X86-NEXT:    movzwl {{[0-9]+}}(%esp), %eax
; X86-NEXT:    rolw $8, %ax
; X86-NEXT:    movl %eax, %edx
; X86-NEXT:    andl $3855, %edx # imm = 0xF0F
; X86-NEXT:    shll $4, %edx
; X86-NEXT:    andl $61680, %eax # imm = 0xF0F0
; X86-NEXT:    shrl $4, %eax
; X86-NEXT:    orl %edx, %eax
; X86-NEXT:    movl %eax, %edx
; X86-NEXT:    andl $13107, %edx # imm = 0x3333
; X86-NEXT:    andl $52428, %eax # imm = 0xCCCC
; X86-NEXT:    shrl $2, %eax
; X86-NEXT:    leal (%eax,%edx,4), %eax
; X86-NEXT:    movl %eax, %edx
; X86-NEXT:    andl $21845, %edx # imm = 0x5555
; X86-NEXT:    andl $43690, %eax # imm = 0xAAAA
; X86-NEXT:    shrl %eax
; X86-NEXT:    leal (%eax,%edx,2), %eax
; X86-NEXT:    rolw $8, %cx
; X86-NEXT:    movl %ecx, %edx
; X86-NEXT:    andl $3855, %edx # imm = 0xF0F
; X86-NEXT:    shll $4, %edx
; X86-NEXT:    andl $61680, %ecx # imm = 0xF0F0
; X86-NEXT:    shrl $4, %ecx
; X86-NEXT:    orl %edx, %ecx
; X86-NEXT:    movl %ecx, %edx
; X86-NEXT:    andl $13107, %edx # imm = 0x3333
; X86-NEXT:    andl $52428, %ecx # imm = 0xCCCC
; X86-NEXT:    shrl $2, %ecx
; X86-NEXT:    leal (%ecx,%edx,4), %ecx
; X86-NEXT:    movl %ecx, %edx
; X86-NEXT:    andl $21845, %edx # imm = 0x5555
; X86-NEXT:    andl $43690, %ecx # imm = 0xAAAA
; X86-NEXT:    shrl %ecx
; X86-NEXT:    leal (%ecx,%edx,2), %edx
; X86-NEXT:    # kill: def $ax killed $ax killed $eax
; X86-NEXT:    # kill: def $dx killed $dx killed $edx
; X86-NEXT:    retl
;
; X64-LABEL: test_bitreverse_v2i16:
; X64:       # %bb.0:
; X64-NEXT:    pxor %xmm1, %xmm1
; X64-NEXT:    movdqa %xmm0, %xmm2
; X64-NEXT:    punpckhbw {{.*#+}} xmm2 = xmm2[8],xmm1[8],xmm2[9],xmm1[9],xmm2[10],xmm1[10],xmm2[11],xmm1[11],xmm2[12],xmm1[12],xmm2[13],xmm1[13],xmm2[14],xmm1[14],xmm2[15],xmm1[15]
; X64-NEXT:    pshufd {{.*#+}} xmm2 = xmm2[2,3,0,1]
; X64-NEXT:    pshuflw {{.*#+}} xmm2 = xmm2[3,2,1,0,4,5,6,7]
; X64-NEXT:    pshufhw {{.*#+}} xmm2 = xmm2[0,1,2,3,7,6,5,4]
; X64-NEXT:    punpcklbw {{.*#+}} xmm0 = xmm0[0],xmm1[0],xmm0[1],xmm1[1],xmm0[2],xmm1[2],xmm0[3],xmm1[3],xmm0[4],xmm1[4],xmm0[5],xmm1[5],xmm0[6],xmm1[6],xmm0[7],xmm1[7]
; X64-NEXT:    pshufd {{.*#+}} xmm0 = xmm0[2,3,0,1]
; X64-NEXT:    pshuflw {{.*#+}} xmm0 = xmm0[3,2,1,0,4,5,6,7]
; X64-NEXT:    pshufhw {{.*#+}} xmm0 = xmm0[0,1,2,3,7,6,5,4]
; X64-NEXT:    packuswb %xmm2, %xmm0
; X64-NEXT:    movdqa %xmm0, %xmm1
; X64-NEXT:    psllw $4, %xmm1
; X64-NEXT:    pand {{.*}}(%rip), %xmm1
; X64-NEXT:    psrlw $4, %xmm0
; X64-NEXT:    pand {{.*}}(%rip), %xmm0
; X64-NEXT:    por %xmm1, %xmm0
; X64-NEXT:    movdqa {{.*#+}} xmm1 = [51,51,51,51,51,51,51,51,51,51,51,51,51,51,51,51]
; X64-NEXT:    pand %xmm0, %xmm1
; X64-NEXT:    psllw $2, %xmm1
; X64-NEXT:    pand {{.*}}(%rip), %xmm0
; X64-NEXT:    psrlw $2, %xmm0
; X64-NEXT:    por %xmm1, %xmm0
; X64-NEXT:    movdqa {{.*#+}} xmm1 = [85,85,85,85,85,85,85,85,85,85,85,85,85,85,85,85]
; X64-NEXT:    pand %xmm0, %xmm1
; X64-NEXT:    paddb %xmm1, %xmm1
; X64-NEXT:    pand {{.*}}(%rip), %xmm0
; X64-NEXT:    psrlw $1, %xmm0
; X64-NEXT:    por %xmm1, %xmm0
; X64-NEXT:    psrlq $48, %xmm0
; X64-NEXT:    retq
  %b = call <2 x i16> @llvm.bitreverse.v2i16(<2 x i16> %a)
  ret <2 x i16> %b
}

declare i64 @llvm.bitreverse.i64(i64) readnone

define i64 @test_bitreverse_i64(i64 %a) nounwind {
; X86-LABEL: test_bitreverse_i64:
; X86:       # %bb.0:
; X86-NEXT:    movl {{[0-9]+}}(%esp), %ecx
; X86-NEXT:    movl {{[0-9]+}}(%esp), %eax
; X86-NEXT:    bswapl %eax
; X86-NEXT:    movl %eax, %edx
; X86-NEXT:    andl $252645135, %edx # imm = 0xF0F0F0F
; X86-NEXT:    shll $4, %edx
; X86-NEXT:    andl $-252645136, %eax # imm = 0xF0F0F0F0
; X86-NEXT:    shrl $4, %eax
; X86-NEXT:    orl %edx, %eax
; X86-NEXT:    movl %eax, %edx
; X86-NEXT:    andl $858993459, %edx # imm = 0x33333333
; X86-NEXT:    andl $-858993460, %eax # imm = 0xCCCCCCCC
; X86-NEXT:    shrl $2, %eax
; X86-NEXT:    leal (%eax,%edx,4), %eax
; X86-NEXT:    movl %eax, %edx
; X86-NEXT:    andl $1431655765, %edx # imm = 0x55555555
; X86-NEXT:    andl $-1431655766, %eax # imm = 0xAAAAAAAA
; X86-NEXT:    shrl %eax
; X86-NEXT:    leal (%eax,%edx,2), %eax
; X86-NEXT:    bswapl %ecx
; X86-NEXT:    movl %ecx, %edx
; X86-NEXT:    andl $252645135, %edx # imm = 0xF0F0F0F
; X86-NEXT:    shll $4, %edx
; X86-NEXT:    andl $-252645136, %ecx # imm = 0xF0F0F0F0
; X86-NEXT:    shrl $4, %ecx
; X86-NEXT:    orl %edx, %ecx
; X86-NEXT:    movl %ecx, %edx
; X86-NEXT:    andl $858993459, %edx # imm = 0x33333333
; X86-NEXT:    andl $-858993460, %ecx # imm = 0xCCCCCCCC
; X86-NEXT:    shrl $2, %ecx
; X86-NEXT:    leal (%ecx,%edx,4), %ecx
; X86-NEXT:    movl %ecx, %edx
; X86-NEXT:    andl $1431655765, %edx # imm = 0x55555555
; X86-NEXT:    andl $-1431655766, %ecx # imm = 0xAAAAAAAA
; X86-NEXT:    shrl %ecx
; X86-NEXT:    leal (%ecx,%edx,2), %edx
; X86-NEXT:    retl
;
; X64-LABEL: test_bitreverse_i64:
; X64:       # %bb.0:
; X64-NEXT:    bswapq %rdi
; X64-NEXT:    movabsq $1085102592571150095, %rax # imm = 0xF0F0F0F0F0F0F0F
; X64-NEXT:    andq %rdi, %rax
; X64-NEXT:    shlq $4, %rax
; X64-NEXT:    movabsq $-1085102592571150096, %rcx # imm = 0xF0F0F0F0F0F0F0F0
; X64-NEXT:    andq %rdi, %rcx
; X64-NEXT:    shrq $4, %rcx
; X64-NEXT:    orq %rax, %rcx
; X64-NEXT:    movabsq $3689348814741910323, %rax # imm = 0x3333333333333333
; X64-NEXT:    andq %rcx, %rax
; X64-NEXT:    movabsq $-3689348814741910324, %rdx # imm = 0xCCCCCCCCCCCCCCCC
; X64-NEXT:    andq %rcx, %rdx
; X64-NEXT:    shrq $2, %rdx
; X64-NEXT:    leaq (%rdx,%rax,4), %rax
; X64-NEXT:    movabsq $6148914691236517205, %rcx # imm = 0x5555555555555555
; X64-NEXT:    andq %rax, %rcx
; X64-NEXT:    movabsq $-6148914691236517206, %rdx # imm = 0xAAAAAAAAAAAAAAAA
; X64-NEXT:    andq %rax, %rdx
; X64-NEXT:    shrq %rdx
; X64-NEXT:    leaq (%rdx,%rcx,2), %rax
; X64-NEXT:    retq
  %b = call i64 @llvm.bitreverse.i64(i64 %a)
  ret i64 %b
}

declare i32 @llvm.bitreverse.i32(i32) readnone

define i32 @test_bitreverse_i32(i32 %a) nounwind {
; X86-LABEL: test_bitreverse_i32:
; X86:       # %bb.0:
; X86-NEXT:    movl {{[0-9]+}}(%esp), %eax
; X86-NEXT:    bswapl %eax
; X86-NEXT:    movl %eax, %ecx
; X86-NEXT:    andl $252645135, %ecx # imm = 0xF0F0F0F
; X86-NEXT:    shll $4, %ecx
; X86-NEXT:    andl $-252645136, %eax # imm = 0xF0F0F0F0
; X86-NEXT:    shrl $4, %eax
; X86-NEXT:    orl %ecx, %eax
; X86-NEXT:    movl %eax, %ecx
; X86-NEXT:    andl $858993459, %ecx # imm = 0x33333333
; X86-NEXT:    andl $-858993460, %eax # imm = 0xCCCCCCCC
; X86-NEXT:    shrl $2, %eax
; X86-NEXT:    leal (%eax,%ecx,4), %eax
; X86-NEXT:    movl %eax, %ecx
; X86-NEXT:    andl $1431655765, %ecx # imm = 0x55555555
; X86-NEXT:    andl $-1431655766, %eax # imm = 0xAAAAAAAA
; X86-NEXT:    shrl %eax
; X86-NEXT:    leal (%eax,%ecx,2), %eax
; X86-NEXT:    retl
;
; X64-LABEL: test_bitreverse_i32:
; X64:       # %bb.0:
; X64-NEXT:    # kill: def $edi killed $edi def $rdi
; X64-NEXT:    bswapl %edi
; X64-NEXT:    movl %edi, %eax
; X64-NEXT:    andl $252645135, %eax # imm = 0xF0F0F0F
; X64-NEXT:    shll $4, %eax
; X64-NEXT:    andl $-252645136, %edi # imm = 0xF0F0F0F0
; X64-NEXT:    shrl $4, %edi
; X64-NEXT:    orl %eax, %edi
; X64-NEXT:    movl %edi, %eax
; X64-NEXT:    andl $858993459, %eax # imm = 0x33333333
; X64-NEXT:    andl $-858993460, %edi # imm = 0xCCCCCCCC
; X64-NEXT:    shrl $2, %edi
; X64-NEXT:    leal (%rdi,%rax,4), %eax
; X64-NEXT:    movl %eax, %ecx
; X64-NEXT:    andl $1431655765, %ecx # imm = 0x55555555
; X64-NEXT:    andl $-1431655766, %eax # imm = 0xAAAAAAAA
; X64-NEXT:    shrl %eax
; X64-NEXT:    leal (%rax,%rcx,2), %eax
; X64-NEXT:    retq
  %b = call i32 @llvm.bitreverse.i32(i32 %a)
  ret i32 %b
}

declare i24 @llvm.bitreverse.i24(i24) readnone

define i24 @test_bitreverse_i24(i24 %a) nounwind {
; X86-LABEL: test_bitreverse_i24:
; X86:       # %bb.0:
; X86-NEXT:    movl {{[0-9]+}}(%esp), %eax
; X86-NEXT:    bswapl %eax
; X86-NEXT:    movl %eax, %ecx
; X86-NEXT:    andl $252645135, %ecx # imm = 0xF0F0F0F
; X86-NEXT:    shll $4, %ecx
; X86-NEXT:    andl $-252645136, %eax # imm = 0xF0F0F0F0
; X86-NEXT:    shrl $4, %eax
; X86-NEXT:    orl %ecx, %eax
; X86-NEXT:    movl %eax, %ecx
; X86-NEXT:    andl $858993459, %ecx # imm = 0x33333333
; X86-NEXT:    andl $-858993460, %eax # imm = 0xCCCCCCCC
; X86-NEXT:    shrl $2, %eax
; X86-NEXT:    leal (%eax,%ecx,4), %eax
; X86-NEXT:    movl %eax, %ecx
; X86-NEXT:    andl $1431655680, %ecx # imm = 0x55555500
; X86-NEXT:    andl $-1431655936, %eax # imm = 0xAAAAAA00
; X86-NEXT:    shrl %eax
; X86-NEXT:    leal (%eax,%ecx,2), %eax
; X86-NEXT:    shrl $8, %eax
; X86-NEXT:    retl
;
; X64-LABEL: test_bitreverse_i24:
; X64:       # %bb.0:
; X64-NEXT:    # kill: def $edi killed $edi def $rdi
; X64-NEXT:    bswapl %edi
; X64-NEXT:    movl %edi, %eax
; X64-NEXT:    andl $252645135, %eax # imm = 0xF0F0F0F
; X64-NEXT:    shll $4, %eax
; X64-NEXT:    andl $-252645136, %edi # imm = 0xF0F0F0F0
; X64-NEXT:    shrl $4, %edi
; X64-NEXT:    orl %eax, %edi
; X64-NEXT:    movl %edi, %eax
; X64-NEXT:    andl $858993459, %eax # imm = 0x33333333
; X64-NEXT:    andl $-858993460, %edi # imm = 0xCCCCCCCC
; X64-NEXT:    shrl $2, %edi
; X64-NEXT:    leal (%rdi,%rax,4), %eax
; X64-NEXT:    movl %eax, %ecx
; X64-NEXT:    andl $1431655680, %ecx # imm = 0x55555500
; X64-NEXT:    andl $-1431655936, %eax # imm = 0xAAAAAA00
; X64-NEXT:    shrl %eax
; X64-NEXT:    leal (%rax,%rcx,2), %eax
; X64-NEXT:    shrl $8, %eax
; X64-NEXT:    retq
  %b = call i24 @llvm.bitreverse.i24(i24 %a)
  ret i24 %b
}

declare i16 @llvm.bitreverse.i16(i16) readnone

define i16 @test_bitreverse_i16(i16 %a) nounwind {
; X86-LABEL: test_bitreverse_i16:
; X86:       # %bb.0:
; X86-NEXT:    movzwl {{[0-9]+}}(%esp), %eax
; X86-NEXT:    rolw $8, %ax
; X86-NEXT:    movl %eax, %ecx
; X86-NEXT:    andl $3855, %ecx # imm = 0xF0F
; X86-NEXT:    shll $4, %ecx
; X86-NEXT:    andl $61680, %eax # imm = 0xF0F0
; X86-NEXT:    shrl $4, %eax
; X86-NEXT:    orl %ecx, %eax
; X86-NEXT:    movl %eax, %ecx
; X86-NEXT:    andl $13107, %ecx # imm = 0x3333
; X86-NEXT:    andl $52428, %eax # imm = 0xCCCC
; X86-NEXT:    shrl $2, %eax
; X86-NEXT:    leal (%eax,%ecx,4), %eax
; X86-NEXT:    movl %eax, %ecx
; X86-NEXT:    andl $21845, %ecx # imm = 0x5555
; X86-NEXT:    andl $43690, %eax # imm = 0xAAAA
; X86-NEXT:    shrl %eax
; X86-NEXT:    leal (%eax,%ecx,2), %eax
; X86-NEXT:    # kill: def $ax killed $ax killed $eax
; X86-NEXT:    retl
;
; X64-LABEL: test_bitreverse_i16:
; X64:       # %bb.0:
; X64-NEXT:    # kill: def $edi killed $edi def $rdi
; X64-NEXT:    rolw $8, %di
; X64-NEXT:    movl %edi, %eax
; X64-NEXT:    andl $3855, %eax # imm = 0xF0F
; X64-NEXT:    shll $4, %eax
; X64-NEXT:    andl $61680, %edi # imm = 0xF0F0
; X64-NEXT:    shrl $4, %edi
; X64-NEXT:    orl %eax, %edi
; X64-NEXT:    movl %edi, %eax
; X64-NEXT:    andl $13107, %eax # imm = 0x3333
; X64-NEXT:    andl $52428, %edi # imm = 0xCCCC
; X64-NEXT:    shrl $2, %edi
; X64-NEXT:    leal (%rdi,%rax,4), %eax
; X64-NEXT:    movl %eax, %ecx
; X64-NEXT:    andl $21845, %ecx # imm = 0x5555
; X64-NEXT:    andl $43690, %eax # imm = 0xAAAA
; X64-NEXT:    shrl %eax
; X64-NEXT:    leal (%rax,%rcx,2), %eax
; X64-NEXT:    # kill: def $ax killed $ax killed $eax
; X64-NEXT:    retq
  %b = call i16 @llvm.bitreverse.i16(i16 %a)
  ret i16 %b
}

declare i8 @llvm.bitreverse.i8(i8) readnone

define i8 @test_bitreverse_i8(i8 %a) {
; X86-LABEL: test_bitreverse_i8:
; X86:       # %bb.0:
; X86-NEXT:    movb {{[0-9]+}}(%esp), %al
; X86-NEXT:    rolb $4, %al
; X86-NEXT:    movl %eax, %ecx
; X86-NEXT:    andb $51, %cl
; X86-NEXT:    shlb $2, %cl
; X86-NEXT:    andb $-52, %al
; X86-NEXT:    shrb $2, %al
; X86-NEXT:    orb %cl, %al
; X86-NEXT:    movl %eax, %ecx
; X86-NEXT:    andb $85, %cl
; X86-NEXT:    addb %cl, %cl
; X86-NEXT:    andb $-86, %al
; X86-NEXT:    shrb %al
; X86-NEXT:    orb %cl, %al
; X86-NEXT:    retl
;
; X64-LABEL: test_bitreverse_i8:
; X64:       # %bb.0:
; X64-NEXT:    # kill: def $edi killed $edi def $rdi
; X64-NEXT:    rolb $4, %dil
; X64-NEXT:    movl %edi, %eax
; X64-NEXT:    andb $51, %al
; X64-NEXT:    shlb $2, %al
; X64-NEXT:    andb $-52, %dil
; X64-NEXT:    shrb $2, %dil
; X64-NEXT:    orb %al, %dil
; X64-NEXT:    movl %edi, %eax
; X64-NEXT:    andb $85, %al
; X64-NEXT:    addb %al, %al
; X64-NEXT:    andb $-86, %dil
; X64-NEXT:    shrb %dil
; X64-NEXT:    addl %edi, %eax
; X64-NEXT:    # kill: def $al killed $al killed $eax
; X64-NEXT:    retq
  %b = call i8 @llvm.bitreverse.i8(i8 %a)
  ret i8 %b
}

declare i4 @llvm.bitreverse.i4(i4) readnone

define i4 @test_bitreverse_i4(i4 %a) {
; X86-LABEL: test_bitreverse_i4:
; X86:       # %bb.0:
; X86-NEXT:    movb {{[0-9]+}}(%esp), %al
; X86-NEXT:    rolb $4, %al
; X86-NEXT:    movl %eax, %ecx
; X86-NEXT:    andb $51, %cl
; X86-NEXT:    shlb $2, %cl
; X86-NEXT:    andb $-52, %al
; X86-NEXT:    shrb $2, %al
; X86-NEXT:    orb %cl, %al
; X86-NEXT:    movl %eax, %ecx
; X86-NEXT:    andb $80, %cl
; X86-NEXT:    addb %cl, %cl
; X86-NEXT:    andb $-96, %al
; X86-NEXT:    shrb %al
; X86-NEXT:    orb %cl, %al
; X86-NEXT:    shrb $4, %al
; X86-NEXT:    retl
;
; X64-LABEL: test_bitreverse_i4:
; X64:       # %bb.0:
; X64-NEXT:    # kill: def $edi killed $edi def $rdi
; X64-NEXT:    rolb $4, %dil
; X64-NEXT:    movl %edi, %eax
; X64-NEXT:    andb $51, %al
; X64-NEXT:    shlb $2, %al
; X64-NEXT:    andb $-52, %dil
; X64-NEXT:    shrb $2, %dil
; X64-NEXT:    orb %al, %dil
; X64-NEXT:    movl %edi, %eax
; X64-NEXT:    andb $80, %al
; X64-NEXT:    addb %al, %al
; X64-NEXT:    andb $-96, %dil
; X64-NEXT:    shrb %dil
; X64-NEXT:    addl %edi, %eax
; X64-NEXT:    shrb $4, %al
; X64-NEXT:    # kill: def $al killed $al killed $eax
; X64-NEXT:    retq
  %b = call i4 @llvm.bitreverse.i4(i4 %a)
  ret i4 %b
}

; These tests check that bitreverse(constant) calls are folded

define <2 x i16> @fold_v2i16() {
; X86-LABEL: fold_v2i16:
; X86:       # %bb.0:
; X86-NEXT:    movw $-4096, %ax # imm = 0xF000
; X86-NEXT:    movw $240, %dx
; X86-NEXT:    retl
;
; X64-LABEL: fold_v2i16:
; X64:       # %bb.0:
; X64-NEXT:    movaps {{.*#+}} xmm0 = [61440,240]
; X64-NEXT:    retq
  %b = call <2 x i16> @llvm.bitreverse.v2i16(<2 x i16> <i16 15, i16 3840>)
  ret <2 x i16> %b
}

define i24 @fold_i24() {
; X86-LABEL: fold_i24:
; X86:       # %bb.0:
; X86-NEXT:    movl $2048, %eax # imm = 0x800
; X86-NEXT:    retl
;
; X64-LABEL: fold_i24:
; X64:       # %bb.0:
; X64-NEXT:    movl $2048, %eax # imm = 0x800
; X64-NEXT:    retq
  %b = call i24 @llvm.bitreverse.i24(i24 4096)
  ret i24 %b
}

define i8 @fold_i8() {
; X86-LABEL: fold_i8:
; X86:       # %bb.0:
; X86-NEXT:    movb $-16, %al
; X86-NEXT:    retl
;
; X64-LABEL: fold_i8:
; X64:       # %bb.0:
; X64-NEXT:    movb $-16, %al
; X64-NEXT:    retq
  %b = call i8 @llvm.bitreverse.i8(i8 15)
  ret i8 %b
}

define i4 @fold_i4() {
; X86-LABEL: fold_i4:
; X86:       # %bb.0:
; X86-NEXT:    movb $1, %al
; X86-NEXT:    retl
;
; X64-LABEL: fold_i4:
; X64:       # %bb.0:
; X64-NEXT:    movb $1, %al
; X64-NEXT:    retq
  %b = call i4 @llvm.bitreverse.i4(i4 8)
  ret i4 %b
}

; These tests check that bitreverse(bitreverse()) calls are removed

define i8 @identity_i8(i8 %a) {
; X86-LABEL: identity_i8:
; X86:       # %bb.0:
; X86-NEXT:    movb {{[0-9]+}}(%esp), %al
; X86-NEXT:    retl
;
; X64-LABEL: identity_i8:
; X64:       # %bb.0:
; X64-NEXT:    movl %edi, %eax
; X64-NEXT:    # kill: def $al killed $al killed $eax
; X64-NEXT:    retq
  %b = call i8 @llvm.bitreverse.i8(i8 %a)
  %c = call i8 @llvm.bitreverse.i8(i8 %b)
  ret i8 %c
}

define <2 x i16> @identity_v2i16(<2 x i16> %a) {
; X86-LABEL: identity_v2i16:
; X86:       # %bb.0:
; X86-NEXT:    movzwl {{[0-9]+}}(%esp), %eax
; X86-NEXT:    movzwl {{[0-9]+}}(%esp), %edx
; X86-NEXT:    retl
;
; X64-LABEL: identity_v2i16:
; X64:       # %bb.0:
; X64-NEXT:    retq
  %b = call <2 x i16> @llvm.bitreverse.v2i16(<2 x i16> %a)
  %c = call <2 x i16> @llvm.bitreverse.v2i16(<2 x i16> %b)
  ret <2 x i16> %c
}

; These tests check that bitreverse(undef) calls are removed

define i8 @undef_i8() {
; X86-LABEL: undef_i8:
; X86:       # %bb.0:
; X86-NEXT:    retl
;
; X64-LABEL: undef_i8:
; X64:       # %bb.0:
; X64-NEXT:    retq
  %b = call i8 @llvm.bitreverse.i8(i8 undef)
  ret i8 %b
}

define <2 x i16> @undef_v2i16() {
; X86-LABEL: undef_v2i16:
; X86:       # %bb.0:
; X86-NEXT:    retl
;
; X64-LABEL: undef_v2i16:
; X64:       # %bb.0:
; X64-NEXT:    retq
  %b = call <2 x i16> @llvm.bitreverse.v2i16(<2 x i16> undef)
  ret <2 x i16> %b
}

; Make sure we don't assert during type legalization promoting a large
; bitreverse due to the need for a large shift that won't fit in the i8 returned
; from getShiftAmountTy.
define i528 @large_promotion(i528 %A) nounwind {
; X86-LABEL: large_promotion:
; X86:       # %bb.0:
; X86-NEXT:    pushl %ebp
; X86-NEXT:    pushl %ebx
; X86-NEXT:    pushl %edi
; X86-NEXT:    pushl %esi
; X86-NEXT:    subl $56, %esp
; X86-NEXT:    movl {{[0-9]+}}(%esp), %eax
; X86-NEXT:    movl {{[0-9]+}}(%esp), %ecx
; X86-NEXT:    movl {{[0-9]+}}(%esp), %edx
; X86-NEXT:    movl {{[0-9]+}}(%esp), %esi
; X86-NEXT:    movl {{[0-9]+}}(%esp), %edi
; X86-NEXT:    movl {{[0-9]+}}(%esp), %ebx
; X86-NEXT:    bswapl %ebx
; X86-NEXT:    movl %ebx, %ebp
; X86-NEXT:    andl $252645135, %ebp # imm = 0xF0F0F0F
; X86-NEXT:    shll $4, %ebp
; X86-NEXT:    andl $-252645136, %ebx # imm = 0xF0F0F0F0
; X86-NEXT:    shrl $4, %ebx
; X86-NEXT:    orl %ebp, %ebx
; X86-NEXT:    movl %ebx, %ebp
; X86-NEXT:    andl $858993459, %ebp # imm = 0x33333333
; X86-NEXT:    andl $-858993460, %ebx # imm = 0xCCCCCCCC
; X86-NEXT:    shrl $2, %ebx
; X86-NEXT:    leal (%ebx,%ebp,4), %ebx
; X86-NEXT:    movl %ebx, %ebp
; X86-NEXT:    andl $1431633920, %ebp # imm = 0x55550000
; X86-NEXT:    andl $-1431699456, %ebx # imm = 0xAAAA0000
; X86-NEXT:    shrl %ebx
; X86-NEXT:    leal (%ebx,%ebp,2), %ebx
; X86-NEXT:    movl %ebx, (%esp) # 4-byte Spill
; X86-NEXT:    bswapl %edi
; X86-NEXT:    movl %edi, %ebx
; X86-NEXT:    andl $252645135, %ebx # imm = 0xF0F0F0F
; X86-NEXT:    shll $4, %ebx
; X86-NEXT:    andl $-252645136, %edi # imm = 0xF0F0F0F0
; X86-NEXT:    shrl $4, %edi
; X86-NEXT:    orl %ebx, %edi
; X86-NEXT:    movl %edi, %ebx
; X86-NEXT:    andl $858993459, %ebx # imm = 0x33333333
; X86-NEXT:    andl $-858993460, %edi # imm = 0xCCCCCCCC
; X86-NEXT:    shrl $2, %edi
; X86-NEXT:    leal (%edi,%ebx,4), %edi
; X86-NEXT:    movl %edi, %ebx
; X86-NEXT:    andl $1431655765, %ebx # imm = 0x55555555
; X86-NEXT:    andl $-1431655766, %edi # imm = 0xAAAAAAAA
; X86-NEXT:    shrl %edi
; X86-NEXT:    leal (%edi,%ebx,2), %edi
; X86-NEXT:    movl %edi, {{[-0-9]+}}(%e{{[sb]}}p) # 4-byte Spill
; X86-NEXT:    bswapl %esi
; X86-NEXT:    movl %esi, %edi
; X86-NEXT:    andl $252645135, %edi # imm = 0xF0F0F0F
; X86-NEXT:    shll $4, %edi
; X86-NEXT:    andl $-252645136, %esi # imm = 0xF0F0F0F0
; X86-NEXT:    shrl $4, %esi
; X86-NEXT:    orl %edi, %esi
; X86-NEXT:    movl %esi, %edi
; X86-NEXT:    andl $858993459, %edi # imm = 0x33333333
; X86-NEXT:    andl $-858993460, %esi # imm = 0xCCCCCCCC
; X86-NEXT:    shrl $2, %esi
; X86-NEXT:    leal (%esi,%edi,4), %esi
; X86-NEXT:    movl %esi, %edi
; X86-NEXT:    andl $1431655765, %edi # imm = 0x55555555
; X86-NEXT:    andl $-1431655766, %esi # imm = 0xAAAAAAAA
; X86-NEXT:    shrl %esi
; X86-NEXT:    leal (%esi,%edi,2), %ebx
; X86-NEXT:    bswapl %edx
; X86-NEXT:    movl %edx, %esi
; X86-NEXT:    andl $252645135, %esi # imm = 0xF0F0F0F
; X86-NEXT:    shll $4, %esi
; X86-NEXT:    andl $-252645136, %edx # imm = 0xF0F0F0F0
; X86-NEXT:    shrl $4, %edx
; X86-NEXT:    orl %esi, %edx
; X86-NEXT:    movl %edx, %esi
; X86-NEXT:    andl $858993459, %esi # imm = 0x33333333
; X86-NEXT:    andl $-858993460, %edx # imm = 0xCCCCCCCC
; X86-NEXT:    shrl $2, %edx
; X86-NEXT:    leal (%edx,%esi,4), %edx
; X86-NEXT:    movl %edx, %esi
; X86-NEXT:    andl $1431655765, %esi # imm = 0x55555555
; X86-NEXT:    andl $-1431655766, %edx # imm = 0xAAAAAAAA
; X86-NEXT:    shrl %edx
; X86-NEXT:    leal (%edx,%esi,2), %edx
; X86-NEXT:    movl %edx, {{[-0-9]+}}(%e{{[sb]}}p) # 4-byte Spill
; X86-NEXT:    bswapl %ecx
; X86-NEXT:    movl %ecx, %edx
; X86-NEXT:    andl $252645135, %edx # imm = 0xF0F0F0F
; X86-NEXT:    shll $4, %edx
; X86-NEXT:    andl $-252645136, %ecx # imm = 0xF0F0F0F0
; X86-NEXT:    shrl $4, %ecx
; X86-NEXT:    orl %edx, %ecx
; X86-NEXT:    movl %ecx, %edx
; X86-NEXT:    andl $858993459, %edx # imm = 0x33333333
; X86-NEXT:    andl $-858993460, %ecx # imm = 0xCCCCCCCC
; X86-NEXT:    shrl $2, %ecx
; X86-NEXT:    leal (%ecx,%edx,4), %ecx
; X86-NEXT:    movl %ecx, %edx
; X86-NEXT:    andl $1431655765, %edx # imm = 0x55555555
; X86-NEXT:    andl $-1431655766, %ecx # imm = 0xAAAAAAAA
; X86-NEXT:    shrl %ecx
; X86-NEXT:    leal (%ecx,%edx,2), %ecx
; X86-NEXT:    movl %ecx, {{[-0-9]+}}(%e{{[sb]}}p) # 4-byte Spill
; X86-NEXT:    bswapl %eax
; X86-NEXT:    movl %eax, %ecx
; X86-NEXT:    andl $252645135, %ecx # imm = 0xF0F0F0F
; X86-NEXT:    shll $4, %ecx
; X86-NEXT:    andl $-252645136, %eax # imm = 0xF0F0F0F0
; X86-NEXT:    shrl $4, %eax
; X86-NEXT:    orl %ecx, %eax
; X86-NEXT:    movl %eax, %ecx
; X86-NEXT:    andl $858993459, %ecx # imm = 0x33333333
; X86-NEXT:    andl $-858993460, %eax # imm = 0xCCCCCCCC
; X86-NEXT:    shrl $2, %eax
; X86-NEXT:    leal (%eax,%ecx,4), %eax
; X86-NEXT:    movl %eax, %ecx
; X86-NEXT:    andl $1431655765, %ecx # imm = 0x55555555
; X86-NEXT:    andl $-1431655766, %eax # imm = 0xAAAAAAAA
; X86-NEXT:    shrl %eax
; X86-NEXT:    leal (%eax,%ecx,2), %eax
; X86-NEXT:    movl %eax, {{[-0-9]+}}(%e{{[sb]}}p) # 4-byte Spill
; X86-NEXT:    movl {{[0-9]+}}(%esp), %eax
; X86-NEXT:    bswapl %eax
; X86-NEXT:    movl %eax, %ecx
; X86-NEXT:    andl $252645135, %ecx # imm = 0xF0F0F0F
; X86-NEXT:    shll $4, %ecx
; X86-NEXT:    andl $-252645136, %eax # imm = 0xF0F0F0F0
; X86-NEXT:    shrl $4, %eax
; X86-NEXT:    orl %ecx, %eax
; X86-NEXT:    movl %eax, %ecx
; X86-NEXT:    andl $858993459, %ecx # imm = 0x33333333
; X86-NEXT:    andl $-858993460, %eax # imm = 0xCCCCCCCC
; X86-NEXT:    shrl $2, %eax
; X86-NEXT:    leal (%eax,%ecx,4), %eax
; X86-NEXT:    movl %eax, %ecx
; X86-NEXT:    andl $1431655765, %ecx # imm = 0x55555555
; X86-NEXT:    andl $-1431655766, %eax # imm = 0xAAAAAAAA
; X86-NEXT:    shrl %eax
; X86-NEXT:    leal (%eax,%ecx,2), %eax
; X86-NEXT:    movl %eax, {{[-0-9]+}}(%e{{[sb]}}p) # 4-byte Spill
; X86-NEXT:    movl {{[0-9]+}}(%esp), %eax
; X86-NEXT:    bswapl %eax
; X86-NEXT:    movl %eax, %ecx
; X86-NEXT:    andl $252645135, %ecx # imm = 0xF0F0F0F
; X86-NEXT:    shll $4, %ecx
; X86-NEXT:    andl $-252645136, %eax # imm = 0xF0F0F0F0
; X86-NEXT:    shrl $4, %eax
; X86-NEXT:    orl %ecx, %eax
; X86-NEXT:    movl %eax, %ecx
; X86-NEXT:    andl $858993459, %ecx # imm = 0x33333333
; X86-NEXT:    andl $-858993460, %eax # imm = 0xCCCCCCCC
; X86-NEXT:    shrl $2, %eax
; X86-NEXT:    leal (%eax,%ecx,4), %eax
; X86-NEXT:    movl %eax, %ecx
; X86-NEXT:    andl $1431655765, %ecx # imm = 0x55555555
; X86-NEXT:    andl $-1431655766, %eax # imm = 0xAAAAAAAA
; X86-NEXT:    shrl %eax
; X86-NEXT:    leal (%eax,%ecx,2), %eax
; X86-NEXT:    movl %eax, {{[-0-9]+}}(%e{{[sb]}}p) # 4-byte Spill
; X86-NEXT:    movl {{[0-9]+}}(%esp), %eax
; X86-NEXT:    bswapl %eax
; X86-NEXT:    movl %eax, %ecx
; X86-NEXT:    andl $252645135, %ecx # imm = 0xF0F0F0F
; X86-NEXT:    shll $4, %ecx
; X86-NEXT:    andl $-252645136, %eax # imm = 0xF0F0F0F0
; X86-NEXT:    shrl $4, %eax
; X86-NEXT:    orl %ecx, %eax
; X86-NEXT:    movl %eax, %ecx
; X86-NEXT:    andl $858993459, %ecx # imm = 0x33333333
; X86-NEXT:    andl $-858993460, %eax # imm = 0xCCCCCCCC
; X86-NEXT:    shrl $2, %eax
; X86-NEXT:    leal (%eax,%ecx,4), %eax
; X86-NEXT:    movl %eax, %ecx
; X86-NEXT:    andl $1431655765, %ecx # imm = 0x55555555
; X86-NEXT:    andl $-1431655766, %eax # imm = 0xAAAAAAAA
; X86-NEXT:    shrl %eax
; X86-NEXT:    leal (%eax,%ecx,2), %eax
; X86-NEXT:    movl %eax, {{[-0-9]+}}(%e{{[sb]}}p) # 4-byte Spill
; X86-NEXT:    movl {{[0-9]+}}(%esp), %eax
; X86-NEXT:    bswapl %eax
; X86-NEXT:    movl %eax, %ecx
; X86-NEXT:    andl $252645135, %ecx # imm = 0xF0F0F0F
; X86-NEXT:    shll $4, %ecx
; X86-NEXT:    andl $-252645136, %eax # imm = 0xF0F0F0F0
; X86-NEXT:    shrl $4, %eax
; X86-NEXT:    orl %ecx, %eax
; X86-NEXT:    movl %eax, %ecx
; X86-NEXT:    andl $858993459, %ecx # imm = 0x33333333
; X86-NEXT:    andl $-858993460, %eax # imm = 0xCCCCCCCC
; X86-NEXT:    shrl $2, %eax
; X86-NEXT:    leal (%eax,%ecx,4), %eax
; X86-NEXT:    movl %eax, %ecx
; X86-NEXT:    andl $1431655765, %ecx # imm = 0x55555555
; X86-NEXT:    andl $-1431655766, %eax # imm = 0xAAAAAAAA
; X86-NEXT:    shrl %eax
; X86-NEXT:    leal (%eax,%ecx,2), %eax
; X86-NEXT:    movl %eax, {{[-0-9]+}}(%e{{[sb]}}p) # 4-byte Spill
; X86-NEXT:    movl {{[0-9]+}}(%esp), %eax
; X86-NEXT:    bswapl %eax
; X86-NEXT:    movl %eax, %ecx
; X86-NEXT:    andl $252645135, %ecx # imm = 0xF0F0F0F
; X86-NEXT:    shll $4, %ecx
; X86-NEXT:    andl $-252645136, %eax # imm = 0xF0F0F0F0
; X86-NEXT:    shrl $4, %eax
; X86-NEXT:    orl %ecx, %eax
; X86-NEXT:    movl %eax, %ecx
; X86-NEXT:    andl $858993459, %ecx # imm = 0x33333333
; X86-NEXT:    andl $-858993460, %eax # imm = 0xCCCCCCCC
; X86-NEXT:    shrl $2, %eax
; X86-NEXT:    leal (%eax,%ecx,4), %eax
; X86-NEXT:    movl %eax, %ecx
; X86-NEXT:    andl $1431655765, %ecx # imm = 0x55555555
; X86-NEXT:    andl $-1431655766, %eax # imm = 0xAAAAAAAA
; X86-NEXT:    shrl %eax
; X86-NEXT:    leal (%eax,%ecx,2), %eax
; X86-NEXT:    movl %eax, {{[-0-9]+}}(%e{{[sb]}}p) # 4-byte Spill
; X86-NEXT:    movl {{[0-9]+}}(%esp), %eax
; X86-NEXT:    bswapl %eax
; X86-NEXT:    movl %eax, %ecx
; X86-NEXT:    andl $252645135, %ecx # imm = 0xF0F0F0F
; X86-NEXT:    shll $4, %ecx
; X86-NEXT:    andl $-252645136, %eax # imm = 0xF0F0F0F0
; X86-NEXT:    shrl $4, %eax
; X86-NEXT:    orl %ecx, %eax
; X86-NEXT:    movl %eax, %ecx
; X86-NEXT:    andl $858993459, %ecx # imm = 0x33333333
; X86-NEXT:    andl $-858993460, %eax # imm = 0xCCCCCCCC
; X86-NEXT:    shrl $2, %eax
; X86-NEXT:    leal (%eax,%ecx,4), %eax
; X86-NEXT:    movl %eax, %ecx
; X86-NEXT:    andl $1431655765, %ecx # imm = 0x55555555
; X86-NEXT:    andl $-1431655766, %eax # imm = 0xAAAAAAAA
; X86-NEXT:    shrl %eax
; X86-NEXT:    leal (%eax,%ecx,2), %eax
; X86-NEXT:    movl %eax, {{[-0-9]+}}(%e{{[sb]}}p) # 4-byte Spill
; X86-NEXT:    movl {{[0-9]+}}(%esp), %eax
; X86-NEXT:    bswapl %eax
; X86-NEXT:    movl %eax, %ecx
; X86-NEXT:    andl $252645135, %ecx # imm = 0xF0F0F0F
; X86-NEXT:    shll $4, %ecx
; X86-NEXT:    andl $-252645136, %eax # imm = 0xF0F0F0F0
; X86-NEXT:    shrl $4, %eax
; X86-NEXT:    orl %ecx, %eax
; X86-NEXT:    movl %eax, %ecx
; X86-NEXT:    andl $858993459, %ecx # imm = 0x33333333
; X86-NEXT:    andl $-858993460, %eax # imm = 0xCCCCCCCC
; X86-NEXT:    shrl $2, %eax
; X86-NEXT:    leal (%eax,%ecx,4), %eax
; X86-NEXT:    movl %eax, %ecx
; X86-NEXT:    andl $1431655765, %ecx # imm = 0x55555555
; X86-NEXT:    andl $-1431655766, %eax # imm = 0xAAAAAAAA
; X86-NEXT:    shrl %eax
; X86-NEXT:    leal (%eax,%ecx,2), %eax
; X86-NEXT:    movl %eax, {{[-0-9]+}}(%e{{[sb]}}p) # 4-byte Spill
; X86-NEXT:    movl {{[0-9]+}}(%esp), %eax
; X86-NEXT:    bswapl %eax
; X86-NEXT:    movl %eax, %ecx
; X86-NEXT:    andl $252645135, %ecx # imm = 0xF0F0F0F
; X86-NEXT:    shll $4, %ecx
; X86-NEXT:    andl $-252645136, %eax # imm = 0xF0F0F0F0
; X86-NEXT:    shrl $4, %eax
; X86-NEXT:    orl %ecx, %eax
; X86-NEXT:    movl %eax, %ecx
; X86-NEXT:    andl $858993459, %ecx # imm = 0x33333333
; X86-NEXT:    andl $-858993460, %eax # imm = 0xCCCCCCCC
; X86-NEXT:    shrl $2, %eax
; X86-NEXT:    leal (%eax,%ecx,4), %eax
; X86-NEXT:    movl %eax, %ecx
; X86-NEXT:    andl $1431655765, %ecx # imm = 0x55555555
; X86-NEXT:    andl $-1431655766, %eax # imm = 0xAAAAAAAA
; X86-NEXT:    shrl %eax
; X86-NEXT:    leal (%eax,%ecx,2), %eax
; X86-NEXT:    movl %eax, {{[-0-9]+}}(%e{{[sb]}}p) # 4-byte Spill
; X86-NEXT:    movl {{[0-9]+}}(%esp), %eax
; X86-NEXT:    bswapl %eax
; X86-NEXT:    movl %eax, %ecx
; X86-NEXT:    andl $252645135, %ecx # imm = 0xF0F0F0F
; X86-NEXT:    shll $4, %ecx
; X86-NEXT:    andl $-252645136, %eax # imm = 0xF0F0F0F0
; X86-NEXT:    shrl $4, %eax
; X86-NEXT:    orl %ecx, %eax
; X86-NEXT:    movl %eax, %ecx
; X86-NEXT:    andl $858993459, %ecx # imm = 0x33333333
; X86-NEXT:    andl $-858993460, %eax # imm = 0xCCCCCCCC
; X86-NEXT:    shrl $2, %eax
; X86-NEXT:    leal (%eax,%ecx,4), %eax
; X86-NEXT:    movl %eax, %ecx
; X86-NEXT:    andl $1431655765, %ecx # imm = 0x55555555
; X86-NEXT:    andl $-1431655766, %eax # imm = 0xAAAAAAAA
; X86-NEXT:    shrl %eax
; X86-NEXT:    leal (%eax,%ecx,2), %eax
; X86-NEXT:    movl %eax, {{[-0-9]+}}(%e{{[sb]}}p) # 4-byte Spill
; X86-NEXT:    movl {{[0-9]+}}(%esp), %eax
; X86-NEXT:    bswapl %eax
; X86-NEXT:    movl %eax, %ecx
; X86-NEXT:    andl $252645135, %ecx # imm = 0xF0F0F0F
; X86-NEXT:    shll $4, %ecx
; X86-NEXT:    andl $-252645136, %eax # imm = 0xF0F0F0F0
; X86-NEXT:    shrl $4, %eax
; X86-NEXT:    orl %ecx, %eax
; X86-NEXT:    movl %eax, %ecx
; X86-NEXT:    andl $858993459, %ecx # imm = 0x33333333
; X86-NEXT:    andl $-858993460, %eax # imm = 0xCCCCCCCC
; X86-NEXT:    shrl $2, %eax
; X86-NEXT:    leal (%eax,%ecx,4), %eax
; X86-NEXT:    movl %eax, %ecx
; X86-NEXT:    andl $1431655765, %ecx # imm = 0x55555555
; X86-NEXT:    andl $-1431655766, %eax # imm = 0xAAAAAAAA
; X86-NEXT:    shrl %eax
; X86-NEXT:    leal (%eax,%ecx,2), %edi
; X86-NEXT:    movl {{[0-9]+}}(%esp), %eax
; X86-NEXT:    bswapl %eax
; X86-NEXT:    movl %eax, %ecx
; X86-NEXT:    andl $252645135, %ecx # imm = 0xF0F0F0F
; X86-NEXT:    shll $4, %ecx
; X86-NEXT:    andl $-252645136, %eax # imm = 0xF0F0F0F0
; X86-NEXT:    shrl $4, %eax
; X86-NEXT:    orl %ecx, %eax
; X86-NEXT:    movl %eax, %ecx
; X86-NEXT:    andl $858993459, %ecx # imm = 0x33333333
; X86-NEXT:    andl $-858993460, %eax # imm = 0xCCCCCCCC
; X86-NEXT:    shrl $2, %eax
; X86-NEXT:    leal (%eax,%ecx,4), %eax
; X86-NEXT:    movl %eax, %ecx
; X86-NEXT:    andl $1431655765, %ecx # imm = 0x55555555
; X86-NEXT:    andl $-1431655766, %eax # imm = 0xAAAAAAAA
; X86-NEXT:    shrl %eax
; X86-NEXT:    leal (%eax,%ecx,2), %edx
; X86-NEXT:    movl (%esp), %esi # 4-byte Reload
; X86-NEXT:    movl {{[-0-9]+}}(%e{{[sb]}}p), %eax # 4-byte Reload
; X86-NEXT:    shrdl $16, %eax, %esi
; X86-NEXT:    shrdl $16, %ebx, %eax
; X86-NEXT:    movl %eax, {{[-0-9]+}}(%e{{[sb]}}p) # 4-byte Spill
; X86-NEXT:    movl {{[-0-9]+}}(%e{{[sb]}}p), %ecx # 4-byte Reload
; X86-NEXT:    shrdl $16, %ecx, %ebx
; X86-NEXT:    movl %ebx, (%esp) # 4-byte Spill
; X86-NEXT:    movl {{[-0-9]+}}(%e{{[sb]}}p), %eax # 4-byte Reload
; X86-NEXT:    shrdl $16, %eax, %ecx
; X86-NEXT:    movl %ecx, {{[-0-9]+}}(%e{{[sb]}}p) # 4-byte Spill
; X86-NEXT:    movl {{[-0-9]+}}(%e{{[sb]}}p), %ecx # 4-byte Reload
; X86-NEXT:    shrdl $16, %ecx, %eax
; X86-NEXT:    movl %eax, {{[-0-9]+}}(%e{{[sb]}}p) # 4-byte Spill
; X86-NEXT:    movl {{[-0-9]+}}(%e{{[sb]}}p), %eax # 4-byte Reload
; X86-NEXT:    shrdl $16, %eax, %ecx
; X86-NEXT:    movl %ecx, {{[-0-9]+}}(%e{{[sb]}}p) # 4-byte Spill
; X86-NEXT:    movl {{[-0-9]+}}(%e{{[sb]}}p), %ecx # 4-byte Reload
; X86-NEXT:    shrdl $16, %ecx, %eax
; X86-NEXT:    movl %eax, {{[-0-9]+}}(%e{{[sb]}}p) # 4-byte Spill
; X86-NEXT:    movl {{[-0-9]+}}(%e{{[sb]}}p), %eax # 4-byte Reload
; X86-NEXT:    shrdl $16, %eax, %ecx
; X86-NEXT:    movl %ecx, {{[-0-9]+}}(%e{{[sb]}}p) # 4-byte Spill
; X86-NEXT:    movl {{[-0-9]+}}(%e{{[sb]}}p), %ecx # 4-byte Reload
; X86-NEXT:    shrdl $16, %ecx, %eax
; X86-NEXT:    movl %eax, {{[-0-9]+}}(%e{{[sb]}}p) # 4-byte Spill
; X86-NEXT:    movl {{[-0-9]+}}(%e{{[sb]}}p), %eax # 4-byte Reload
; X86-NEXT:    shrdl $16, %eax, %ecx
; X86-NEXT:    movl %ecx, {{[-0-9]+}}(%e{{[sb]}}p) # 4-byte Spill
; X86-NEXT:    movl {{[-0-9]+}}(%e{{[sb]}}p), %ecx # 4-byte Reload
; X86-NEXT:    shrdl $16, %ecx, %eax
; X86-NEXT:    movl %eax, {{[-0-9]+}}(%e{{[sb]}}p) # 4-byte Spill
; X86-NEXT:    movl {{[-0-9]+}}(%e{{[sb]}}p), %ebp # 4-byte Reload
; X86-NEXT:    shrdl $16, %ebp, %ecx
; X86-NEXT:    movl %ecx, {{[-0-9]+}}(%e{{[sb]}}p) # 4-byte Spill
; X86-NEXT:    movl {{[-0-9]+}}(%e{{[sb]}}p), %ebx # 4-byte Reload
; X86-NEXT:    shrdl $16, %ebx, %ebp
; X86-NEXT:    movl {{[-0-9]+}}(%e{{[sb]}}p), %eax # 4-byte Reload
; X86-NEXT:    shrdl $16, %eax, %ebx
; X86-NEXT:    shrdl $16, %edi, %eax
; X86-NEXT:    movl %eax, %ecx
; X86-NEXT:    shrdl $16, %edx, %edi
; X86-NEXT:    movl {{[0-9]+}}(%esp), %eax
; X86-NEXT:    movl %edi, 60(%eax)
; X86-NEXT:    movl %ecx, 56(%eax)
; X86-NEXT:    movl %ebx, 52(%eax)
; X86-NEXT:    movl %ebp, 48(%eax)
; X86-NEXT:    movl {{[-0-9]+}}(%e{{[sb]}}p), %ecx # 4-byte Reload
; X86-NEXT:    movl %ecx, 44(%eax)
; X86-NEXT:    movl {{[-0-9]+}}(%e{{[sb]}}p), %ecx # 4-byte Reload
; X86-NEXT:    movl %ecx, 40(%eax)
; X86-NEXT:    movl {{[-0-9]+}}(%e{{[sb]}}p), %ecx # 4-byte Reload
; X86-NEXT:    movl %ecx, 36(%eax)
; X86-NEXT:    movl {{[-0-9]+}}(%e{{[sb]}}p), %ecx # 4-byte Reload
; X86-NEXT:    movl %ecx, 32(%eax)
; X86-NEXT:    movl {{[-0-9]+}}(%e{{[sb]}}p), %ecx # 4-byte Reload
; X86-NEXT:    movl %ecx, 28(%eax)
; X86-NEXT:    movl {{[-0-9]+}}(%e{{[sb]}}p), %ecx # 4-byte Reload
; X86-NEXT:    movl %ecx, 24(%eax)
; X86-NEXT:    movl {{[-0-9]+}}(%e{{[sb]}}p), %ecx # 4-byte Reload
; X86-NEXT:    movl %ecx, 20(%eax)
; X86-NEXT:    movl {{[-0-9]+}}(%e{{[sb]}}p), %ecx # 4-byte Reload
; X86-NEXT:    movl %ecx, 16(%eax)
; X86-NEXT:    movl {{[-0-9]+}}(%e{{[sb]}}p), %ecx # 4-byte Reload
; X86-NEXT:    movl %ecx, 12(%eax)
; X86-NEXT:    movl (%esp), %ecx # 4-byte Reload
; X86-NEXT:    movl %ecx, 8(%eax)
; X86-NEXT:    movl {{[-0-9]+}}(%e{{[sb]}}p), %ecx # 4-byte Reload
; X86-NEXT:    movl %ecx, 4(%eax)
; X86-NEXT:    movl %esi, (%eax)
; X86-NEXT:    shrl $16, %edx
; X86-NEXT:    movw %dx, 64(%eax)
; X86-NEXT:    addl $56, %esp
; X86-NEXT:    popl %esi
; X86-NEXT:    popl %edi
; X86-NEXT:    popl %ebx
; X86-NEXT:    popl %ebp
; X86-NEXT:    retl $4
;
; X64-LABEL: large_promotion:
; X64:       # %bb.0:
; X64-NEXT:    pushq %rbp
; X64-NEXT:    pushq %r15
; X64-NEXT:    pushq %r14
; X64-NEXT:    pushq %r13
; X64-NEXT:    pushq %r12
; X64-NEXT:    pushq %rbx
; X64-NEXT:    movq %rdi, %r12
; X64-NEXT:    movq {{[0-9]+}}(%rsp), %rbp
; X64-NEXT:    movq {{[0-9]+}}(%rsp), %rbx
; X64-NEXT:    bswapq %rbx
; X64-NEXT:    movabsq $1085102592571150095, %r13 # imm = 0xF0F0F0F0F0F0F0F
; X64-NEXT:    movq %rbx, %r10
; X64-NEXT:    andq %r13, %r10
; X64-NEXT:    shlq $4, %r10
; X64-NEXT:    movabsq $-1085102592571150096, %rax # imm = 0xF0F0F0F0F0F0F0F0
; X64-NEXT:    andq %rax, %rbx
; X64-NEXT:    shrq $4, %rbx
; X64-NEXT:    orq %r10, %rbx
; X64-NEXT:    movabsq $3689348814741910323, %r11 # imm = 0x3333333333333333
; X64-NEXT:    movq %rbx, %r10
; X64-NEXT:    andq %r11, %r10
; X64-NEXT:    movabsq $-3689348814741910324, %r14 # imm = 0xCCCCCCCCCCCCCCCC
; X64-NEXT:    andq %r14, %rbx
; X64-NEXT:    shrq $2, %rbx
; X64-NEXT:    leaq (%rbx,%r10,4), %r10
; X64-NEXT:    movabsq $6148820866244280320, %rbx # imm = 0x5555000000000000
; X64-NEXT:    andq %r10, %rbx
; X64-NEXT:    movabsq $-6149102341220990976, %rdi # imm = 0xAAAA000000000000
; X64-NEXT:    andq %r10, %rdi
; X64-NEXT:    shrq %rdi
; X64-NEXT:    leaq (%rdi,%rbx,2), %rdi
; X64-NEXT:    movq %rdi, {{[-0-9]+}}(%r{{[sb]}}p) # 8-byte Spill
; X64-NEXT:    bswapq %rbp
; X64-NEXT:    movq %rbp, %rdi
; X64-NEXT:    andq %r13, %rdi
; X64-NEXT:    shlq $4, %rdi
; X64-NEXT:    andq %rax, %rbp
; X64-NEXT:    shrq $4, %rbp
; X64-NEXT:    orq %rdi, %rbp
; X64-NEXT:    movq %rbp, %rdi
; X64-NEXT:    andq %r11, %rdi
; X64-NEXT:    andq %r14, %rbp
; X64-NEXT:    shrq $2, %rbp
; X64-NEXT:    leaq (%rbp,%rdi,4), %rbp
; X64-NEXT:    movabsq $6148914691236517205, %rbx # imm = 0x5555555555555555
; X64-NEXT:    movq %rbp, %r10
; X64-NEXT:    andq %rbx, %r10
; X64-NEXT:    movabsq $-6148914691236517206, %rdi # imm = 0xAAAAAAAAAAAAAAAA
; X64-NEXT:    andq %rdi, %rbp
; X64-NEXT:    shrq %rbp
; X64-NEXT:    leaq (%rbp,%r10,2), %rbp
; X64-NEXT:    movq %rbp, {{[-0-9]+}}(%r{{[sb]}}p) # 8-byte Spill
; X64-NEXT:    movq {{[0-9]+}}(%rsp), %rbp
; X64-NEXT:    bswapq %rbp
; X64-NEXT:    movq %rbp, %r10
; X64-NEXT:    andq %r13, %r10
; X64-NEXT:    shlq $4, %r10
; X64-NEXT:    andq %rax, %rbp
; X64-NEXT:    movq %rax, %r15
; X64-NEXT:    shrq $4, %rbp
; X64-NEXT:    orq %r10, %rbp
; X64-NEXT:    movq %rbp, %r10
; X64-NEXT:    andq %r11, %r10
; X64-NEXT:    andq %r14, %rbp
; X64-NEXT:    shrq $2, %rbp
; X64-NEXT:    leaq (%rbp,%r10,4), %rbp
; X64-NEXT:    movq %rbp, %r10
; X64-NEXT:    andq %rbx, %r10
; X64-NEXT:    andq %rdi, %rbp
; X64-NEXT:    shrq %rbp
; X64-NEXT:    leaq (%rbp,%r10,2), %rbp
; X64-NEXT:    movq {{[0-9]+}}(%rsp), %r10
; X64-NEXT:    bswapq %r10
; X64-NEXT:    movq %r10, %rax
; X64-NEXT:    andq %r13, %rax
; X64-NEXT:    shlq $4, %rax
; X64-NEXT:    movq %r15, %rdi
; X64-NEXT:    andq %r15, %r10
; X64-NEXT:    shrq $4, %r10
; X64-NEXT:    orq %rax, %r10
; X64-NEXT:    movq %r10, %rax
; X64-NEXT:    andq %r11, %rax
; X64-NEXT:    andq %r14, %r10
; X64-NEXT:    shrq $2, %r10
; X64-NEXT:    leaq (%r10,%rax,4), %rax
; X64-NEXT:    movq %rax, %r10
; X64-NEXT:    andq %rbx, %r10
; X64-NEXT:    movabsq $-6148914691236517206, %r15 # imm = 0xAAAAAAAAAAAAAAAA
; X64-NEXT:    andq %r15, %rax
; X64-NEXT:    shrq %rax
; X64-NEXT:    leaq (%rax,%r10,2), %r10
; X64-NEXT:    bswapq %r9
; X64-NEXT:    movq %r9, %rax
; X64-NEXT:    andq %r13, %rax
; X64-NEXT:    shlq $4, %rax
; X64-NEXT:    andq %rdi, %r9
; X64-NEXT:    shrq $4, %r9
; X64-NEXT:    orq %rax, %r9
; X64-NEXT:    movq %r9, %rax
; X64-NEXT:    andq %r11, %rax
; X64-NEXT:    andq %r14, %r9
; X64-NEXT:    shrq $2, %r9
; X64-NEXT:    leaq (%r9,%rax,4), %rax
; X64-NEXT:    movq %rax, %r9
; X64-NEXT:    andq %rbx, %r9
; X64-NEXT:    andq %r15, %rax
; X64-NEXT:    shrq %rax
; X64-NEXT:    leaq (%rax,%r9,2), %r9
; X64-NEXT:    bswapq %r8
; X64-NEXT:    movq %r8, %rax
; X64-NEXT:    andq %r13, %rax
; X64-NEXT:    shlq $4, %rax
; X64-NEXT:    andq %rdi, %r8
; X64-NEXT:    shrq $4, %r8
; X64-NEXT:    orq %rax, %r8
; X64-NEXT:    movq %r8, %rax
; X64-NEXT:    andq %r11, %rax
; X64-NEXT:    andq %r14, %r8
; X64-NEXT:    shrq $2, %r8
; X64-NEXT:    leaq (%r8,%rax,4), %rax
; X64-NEXT:    movq %rax, %r8
; X64-NEXT:    andq %rbx, %r8
; X64-NEXT:    andq %r15, %rax
; X64-NEXT:    shrq %rax
; X64-NEXT:    leaq (%rax,%r8,2), %r8
; X64-NEXT:    bswapq %rcx
; X64-NEXT:    movq %rcx, %rax
; X64-NEXT:    andq %r13, %rax
; X64-NEXT:    shlq $4, %rax
; X64-NEXT:    andq %rdi, %rcx
; X64-NEXT:    shrq $4, %rcx
; X64-NEXT:    orq %rax, %rcx
; X64-NEXT:    movq %rcx, %rax
; X64-NEXT:    andq %r11, %rax
; X64-NEXT:    andq %r14, %rcx
; X64-NEXT:    shrq $2, %rcx
; X64-NEXT:    leaq (%rcx,%rax,4), %rax
; X64-NEXT:    movq %rax, %rcx
; X64-NEXT:    andq %rbx, %rcx
; X64-NEXT:    andq %r15, %rax
; X64-NEXT:    shrq %rax
; X64-NEXT:    leaq (%rax,%rcx,2), %rcx
; X64-NEXT:    bswapq %rdx
; X64-NEXT:    movq %rdx, %rax
; X64-NEXT:    andq %r13, %rax
; X64-NEXT:    shlq $4, %rax
; X64-NEXT:    andq %rdi, %rdx
; X64-NEXT:    shrq $4, %rdx
; X64-NEXT:    orq %rax, %rdx
; X64-NEXT:    movq %rdx, %rax
; X64-NEXT:    andq %r11, %rax
; X64-NEXT:    andq %r14, %rdx
; X64-NEXT:    shrq $2, %rdx
; X64-NEXT:    leaq (%rdx,%rax,4), %rax
; X64-NEXT:    movq %rax, %rdx
; X64-NEXT:    andq %rbx, %rdx
; X64-NEXT:    andq %r15, %rax
; X64-NEXT:    shrq %rax
; X64-NEXT:    leaq (%rax,%rdx,2), %rax
; X64-NEXT:    bswapq %rsi
; X64-NEXT:    andq %rsi, %r13
; X64-NEXT:    andq %rdi, %rsi
; X64-NEXT:    shlq $4, %r13
; X64-NEXT:    shrq $4, %rsi
; X64-NEXT:    orq %r13, %rsi
; X64-NEXT:    andq %rsi, %r11
; X64-NEXT:    andq %r14, %rsi
; X64-NEXT:    shrq $2, %rsi
; X64-NEXT:    leaq (%rsi,%r11,4), %rdx
; X64-NEXT:    andq %rdx, %rbx
; X64-NEXT:    andq %r15, %rdx
; X64-NEXT:    shrq %rdx
; X64-NEXT:    leaq (%rdx,%rbx,2), %rdx
; X64-NEXT:    movq {{[-0-9]+}}(%r{{[sb]}}p), %rsi # 8-byte Reload
; X64-NEXT:    movq {{[-0-9]+}}(%r{{[sb]}}p), %rdi # 8-byte Reload
; X64-NEXT:    shrdq $48, %rdi, %rsi
; X64-NEXT:    shrdq $48, %rbp, %rdi
; X64-NEXT:    shrdq $48, %r10, %rbp
; X64-NEXT:    shrdq $48, %r9, %r10
; X64-NEXT:    shrdq $48, %r8, %r9
; X64-NEXT:    shrdq $48, %rcx, %r8
; X64-NEXT:    shrdq $48, %rax, %rcx
; X64-NEXT:    shrdq $48, %rdx, %rax
; X64-NEXT:    movq %rax, 56(%r12)
; X64-NEXT:    movq %rcx, 48(%r12)
; X64-NEXT:    movq %r8, 40(%r12)
; X64-NEXT:    movq %r9, 32(%r12)
; X64-NEXT:    movq %r10, 24(%r12)
; X64-NEXT:    movq %rbp, 16(%r12)
; X64-NEXT:    movq %rdi, 8(%r12)
; X64-NEXT:    movq %rsi, (%r12)
; X64-NEXT:    shrq $48, %rdx
; X64-NEXT:    movw %dx, 64(%r12)
; X64-NEXT:    movq %r12, %rax
; X64-NEXT:    popq %rbx
; X64-NEXT:    popq %r12
; X64-NEXT:    popq %r13
; X64-NEXT:    popq %r14
; X64-NEXT:    popq %r15
; X64-NEXT:    popq %rbp
; X64-NEXT:    retq
  %Z = call i528 @llvm.bitreverse.i528(i528 %A)
  ret i528 %Z
}
declare i528 @llvm.bitreverse.i528(i528)