llvm/test/CodeGen/X86/pr38539.ll

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

; This test is targeted at 64-bit mode. It used to crash due to the creation of an EXTRACT_SUBREG after the peephole pass had ran.
define void @f() nounwind {
; X64-LABEL: f:
; X64:       # %bb.0: # %BB
; X64-NEXT:    movzbl (%rax), %eax
; X64-NEXT:    cmpb $0, (%rax)
; X64-NEXT:    setne (%rax)
; X64-NEXT:    leaq -{{[0-9]+}}(%rsp), %rax
; X64-NEXT:    movq %rax, (%rax)
; X64-NEXT:    movb $0, (%rax)
; X64-NEXT:    retq
;
; X86-LABEL: f:
; X86:       # %bb.0: # %BB_udiv-special-cases
; X86-NEXT:    pushl %ebp
; X86-NEXT:    movl %esp, %ebp
; X86-NEXT:    pushl %ebx
; X86-NEXT:    pushl %edi
; X86-NEXT:    pushl %esi
; X86-NEXT:    andl $-16, %esp
; X86-NEXT:    subl $176, %esp
; X86-NEXT:    movzbl {{[0-9]+}}(%esp), %edi
; X86-NEXT:    movl {{[0-9]+}}(%esp), %esi
; X86-NEXT:    movl {{[0-9]+}}(%esp), %edx
; X86-NEXT:    movzbl (%eax), %eax
; X86-NEXT:    movzbl (%eax), %ecx
; X86-NEXT:    movzbl %al, %eax
; X86-NEXT:    movb %cl, {{[-0-9]+}}(%e{{[sb]}}p) # 1-byte Spill
; X86-NEXT:    divb %cl
; X86-NEXT:    movl %edi, %eax
; X86-NEXT:    shll $30, %eax
; X86-NEXT:    movl %eax, %ecx
; X86-NEXT:    sarl $30, %ecx
; X86-NEXT:    sarl $31, %eax
; X86-NEXT:    xorl %eax, %edi
; X86-NEXT:    xorl %eax, %edx
; X86-NEXT:    shrdl $1, %eax, %ecx
; X86-NEXT:    xorl %ecx, %esi
; X86-NEXT:    subl %ecx, %esi
; X86-NEXT:    sbbl %eax, %edx
; X86-NEXT:    sbbl %eax, %edi
; X86-NEXT:    movl %edi, %ecx
; X86-NEXT:    shldl $30, %edx, %ecx
; X86-NEXT:    movl %edx, {{[-0-9]+}}(%e{{[sb]}}p) # 4-byte Spill
; X86-NEXT:    shldl $30, %esi, %edx
; X86-NEXT:    testl %ecx, %ecx
; X86-NEXT:    jne .LBB0_1
; X86-NEXT:  # %bb.2: # %BB_udiv-special-cases
; X86-NEXT:    bsrl %edx, %eax
; X86-NEXT:    xorl $31, %eax
; X86-NEXT:    addl $32, %eax
; X86-NEXT:    jmp .LBB0_3
; X86-NEXT:  .LBB0_1:
; X86-NEXT:    bsrl %ecx, %eax
; X86-NEXT:    xorl $31, %eax
; X86-NEXT:  .LBB0_3: # %BB_udiv-special-cases
; X86-NEXT:    movl %esi, {{[-0-9]+}}(%e{{[sb]}}p) # 4-byte Spill
; X86-NEXT:    shll $30, %esi
; X86-NEXT:    jne .LBB0_4
; X86-NEXT:  # %bb.5: # %BB_udiv-special-cases
; X86-NEXT:    movl $64, %esi
; X86-NEXT:    orl %ecx, %edx
; X86-NEXT:    je .LBB0_7
; X86-NEXT:    jmp .LBB0_8
; X86-NEXT:  .LBB0_4:
; X86-NEXT:    bsrl %esi, %esi
; X86-NEXT:    xorl $31, %esi
; X86-NEXT:    orl %ecx, %edx
; X86-NEXT:    jne .LBB0_8
; X86-NEXT:  .LBB0_7: # %BB_udiv-special-cases
; X86-NEXT:    addl $64, %esi
; X86-NEXT:    movl %esi, %eax
; X86-NEXT:  .LBB0_8: # %BB_udiv-special-cases
; X86-NEXT:    leal {{[0-9]+}}(%esp), %esi
; X86-NEXT:    addl $-66, %eax
; X86-NEXT:    movl $0, %ebx
; X86-NEXT:    adcl $-1, %ebx
; X86-NEXT:    movl $0, %edx
; X86-NEXT:    adcl $3, %edx
; X86-NEXT:    movb $1, %cl
; X86-NEXT:    testb %cl, %cl
; X86-NEXT:    jne .LBB0_14
; X86-NEXT:  # %bb.9: # %BB_udiv-special-cases
; X86-NEXT:    andl $3, %edx
; X86-NEXT:    movl %eax, %ecx
; X86-NEXT:    xorl $65, %ecx
; X86-NEXT:    orl %edx, %ecx
; X86-NEXT:    orl %ebx, %ecx
; X86-NEXT:    je .LBB0_14
; X86-NEXT:  # %bb.10: # %udiv-bb1
; X86-NEXT:    movl %eax, %ecx
; X86-NEXT:    addl $1, %ecx
; X86-NEXT:    movl %ecx, {{[-0-9]+}}(%e{{[sb]}}p) # 4-byte Spill
; X86-NEXT:    adcl $0, %ebx
; X86-NEXT:    movl %ebx, {{[-0-9]+}}(%e{{[sb]}}p) # 4-byte Spill
; X86-NEXT:    adcl $0, %edx
; X86-NEXT:    andl $3, %edx
; X86-NEXT:    movl %edx, {{[-0-9]+}}(%e{{[sb]}}p) # 4-byte Spill
; X86-NEXT:    movb $65, %cl
; X86-NEXT:    subb %al, %cl
; X86-NEXT:    movb %cl, %ch
; X86-NEXT:    andb $7, %ch
; X86-NEXT:    shrb $3, %cl
; X86-NEXT:    andb $15, %cl
; X86-NEXT:    negb %cl
; X86-NEXT:    movsbl %cl, %esi
; X86-NEXT:    movl $0, {{[0-9]+}}(%esp)
; X86-NEXT:    movl $0, {{[0-9]+}}(%esp)
; X86-NEXT:    movl $0, {{[0-9]+}}(%esp)
; X86-NEXT:    movl $0, {{[0-9]+}}(%esp)
; X86-NEXT:    movl $0, {{[0-9]+}}(%esp)
; X86-NEXT:    movl $0, {{[0-9]+}}(%esp)
; X86-NEXT:    movl $0, {{[0-9]+}}(%esp)
; X86-NEXT:    movl $0, {{[0-9]+}}(%esp)
; X86-NEXT:    movl %edi, {{[-0-9]+}}(%e{{[sb]}}p) # 4-byte Spill
; X86-NEXT:    movl 136(%esp,%esi), %edi
; X86-NEXT:    movb %ch, %cl
; X86-NEXT:    shll %cl, %edi
; X86-NEXT:    notb %cl
; X86-NEXT:    movl 128(%esp,%esi), %ebx
; X86-NEXT:    movl 132(%esp,%esi), %eax
; X86-NEXT:    movl %eax, %esi
; X86-NEXT:    shrl %esi
; X86-NEXT:    shrl %cl, %esi
; X86-NEXT:    movb %ch, %cl
; X86-NEXT:    shldl %cl, %ebx, %eax
; X86-NEXT:    movl %eax, {{[-0-9]+}}(%e{{[sb]}}p) # 4-byte Spill
; X86-NEXT:    shll %cl, %ebx
; X86-NEXT:    movl %ebx, {{[-0-9]+}}(%e{{[sb]}}p) # 4-byte Spill
; X86-NEXT:    movl {{[-0-9]+}}(%e{{[sb]}}p), %ecx # 4-byte Reload
; X86-NEXT:    orl %edx, %ecx
; X86-NEXT:    orl {{[-0-9]+}}(%e{{[sb]}}p), %ecx # 4-byte Folded Reload
; X86-NEXT:    je .LBB0_13
; X86-NEXT:  # %bb.11: # %udiv-preheader
; X86-NEXT:    andl $3, {{[-0-9]+}}(%e{{[sb]}}p) # 4-byte Folded Spill
; X86-NEXT:    orl %esi, %edi
; X86-NEXT:    andl $3, %edi
; X86-NEXT:    movl %edi, {{[-0-9]+}}(%e{{[sb]}}p) # 4-byte Spill
; X86-NEXT:    movl $0, {{[0-9]+}}(%esp)
; X86-NEXT:    movl $0, {{[0-9]+}}(%esp)
; X86-NEXT:    movl $0, {{[0-9]+}}(%esp)
; X86-NEXT:    movl $0, {{[0-9]+}}(%esp)
; X86-NEXT:    movl $0, {{[0-9]+}}(%esp)
; X86-NEXT:    movl $0, {{[0-9]+}}(%esp)
; X86-NEXT:    movl $0, {{[0-9]+}}(%esp)
; X86-NEXT:    movl $0, {{[0-9]+}}(%esp)
; X86-NEXT:    movl {{[-0-9]+}}(%e{{[sb]}}p), %eax # 4-byte Reload
; X86-NEXT:    movb %al, %ch
; X86-NEXT:    andb $7, %ch
; X86-NEXT:    # kill: def $al killed $al killed $eax
; X86-NEXT:    shrb $3, %al
; X86-NEXT:    andb $15, %al
; X86-NEXT:    movzbl %al, %edx
; X86-NEXT:    movl 80(%esp,%edx), %edi
; X86-NEXT:    movl 84(%esp,%edx), %eax
; X86-NEXT:    movl %eax, %esi
; X86-NEXT:    movb %ch, %cl
; X86-NEXT:    shrl %cl, %esi
; X86-NEXT:    notb %cl
; X86-NEXT:    movl 88(%esp,%edx), %ebx
; X86-NEXT:    addl %ebx, %ebx
; X86-NEXT:    shll %cl, %ebx
; X86-NEXT:    orl %esi, %ebx
; X86-NEXT:    movb %ch, %cl
; X86-NEXT:    shrdl %cl, %eax, %edi
; X86-NEXT:    movl %edi, {{[-0-9]+}}(%e{{[sb]}}p) # 4-byte Spill
; X86-NEXT:    movl $0, {{[-0-9]+}}(%e{{[sb]}}p) # 4-byte Folded Spill
; X86-NEXT:    movl {{[-0-9]+}}(%e{{[sb]}}p), %eax # 4-byte Reload
; X86-NEXT:    addl $-1, %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:    adcl $-1, %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:    adcl $3, %eax
; X86-NEXT:    andl $3, %eax
; X86-NEXT:    movl %eax, {{[-0-9]+}}(%e{{[sb]}}p) # 4-byte Spill
; X86-NEXT:    movl $0, {{[-0-9]+}}(%e{{[sb]}}p) # 4-byte Folded Spill
; X86-NEXT:    xorl %ecx, %ecx
; X86-NEXT:    .p2align 4, 0x90
; X86-NEXT:  .LBB0_12: # %udiv-do-while
; X86-NEXT:    # =>This Inner Loop Header: Depth=1
; X86-NEXT:    shldl $1, %ebx, %ecx
; X86-NEXT:    movl {{[-0-9]+}}(%e{{[sb]}}p), %edi # 4-byte Reload
; X86-NEXT:    shldl $1, %edi, %ebx
; X86-NEXT:    movl %ebx, {{[-0-9]+}}(%e{{[sb]}}p) # 4-byte Spill
; X86-NEXT:    movl {{[-0-9]+}}(%e{{[sb]}}p), %esi # 4-byte Reload
; X86-NEXT:    movl %esi, %eax
; X86-NEXT:    andl $2, %eax
; X86-NEXT:    shrl %eax
; X86-NEXT:    leal (%eax,%edi,2), %edi
; X86-NEXT:    movl {{[-0-9]+}}(%e{{[sb]}}p), %edx # 4-byte Reload
; X86-NEXT:    shldl $1, %edx, %esi
; X86-NEXT:    movl {{[-0-9]+}}(%e{{[sb]}}p), %ebx # 4-byte Reload
; X86-NEXT:    orl %ebx, %esi
; X86-NEXT:    movl {{[-0-9]+}}(%e{{[sb]}}p), %eax # 4-byte Reload
; X86-NEXT:    shldl $1, %eax, %edx
; X86-NEXT:    orl %ebx, %edx
; X86-NEXT:    movl {{[-0-9]+}}(%e{{[sb]}}p), %ebx # 4-byte Reload
; X86-NEXT:    movl %edx, {{[-0-9]+}}(%e{{[sb]}}p) # 4-byte Spill
; X86-NEXT:    addl %eax, %eax
; X86-NEXT:    orl {{[-0-9]+}}(%e{{[sb]}}p), %eax # 4-byte Folded Reload
; X86-NEXT:    movl %eax, {{[-0-9]+}}(%e{{[sb]}}p) # 4-byte Spill
; X86-NEXT:    andl $3, %esi
; X86-NEXT:    movl %esi, {{[-0-9]+}}(%e{{[sb]}}p) # 4-byte Spill
; X86-NEXT:    cmpl %edi, {{[-0-9]+}}(%e{{[sb]}}p) # 4-byte Folded Reload
; X86-NEXT:    movl {{[-0-9]+}}(%e{{[sb]}}p), %eax # 4-byte Reload
; X86-NEXT:    sbbl %ebx, %eax
; X86-NEXT:    movl {{[-0-9]+}}(%e{{[sb]}}p), %esi # 4-byte Reload
; X86-NEXT:    sbbl %ecx, %esi
; X86-NEXT:    shll $30, %esi
; X86-NEXT:    movl %esi, %eax
; X86-NEXT:    sarl $30, %eax
; X86-NEXT:    sarl $31, %esi
; X86-NEXT:    shrdl $1, %esi, %eax
; X86-NEXT:    movl %eax, %edx
; X86-NEXT:    andl $1, %edx
; X86-NEXT:    movl %edx, {{[-0-9]+}}(%e{{[sb]}}p) # 4-byte Spill
; X86-NEXT:    andl {{[-0-9]+}}(%e{{[sb]}}p), %eax # 4-byte Folded Reload
; X86-NEXT:    movl %esi, %edx
; X86-NEXT:    andl {{[-0-9]+}}(%e{{[sb]}}p), %edx # 4-byte Folded Reload
; X86-NEXT:    andl {{[-0-9]+}}(%e{{[sb]}}p), %esi # 4-byte Folded Reload
; X86-NEXT:    subl %eax, %edi
; X86-NEXT:    movl %edi, {{[-0-9]+}}(%e{{[sb]}}p) # 4-byte Spill
; X86-NEXT:    sbbl %esi, %ebx
; X86-NEXT:    sbbl %edx, %ecx
; X86-NEXT:    andl $3, %ecx
; X86-NEXT:    movl {{[-0-9]+}}(%e{{[sb]}}p), %eax # 4-byte Reload
; X86-NEXT:    addl $-1, %eax
; X86-NEXT:    movl {{[-0-9]+}}(%e{{[sb]}}p), %edx # 4-byte Reload
; X86-NEXT:    adcl $-1, %edx
; X86-NEXT:    movl {{[-0-9]+}}(%e{{[sb]}}p), %esi # 4-byte Reload
; X86-NEXT:    adcl $3, %esi
; X86-NEXT:    andl $3, %esi
; X86-NEXT:    movl %eax, {{[-0-9]+}}(%e{{[sb]}}p) # 4-byte Spill
; X86-NEXT:    movl %esi, {{[-0-9]+}}(%e{{[sb]}}p) # 4-byte Spill
; X86-NEXT:    orl %esi, %eax
; X86-NEXT:    movl %edx, {{[-0-9]+}}(%e{{[sb]}}p) # 4-byte Spill
; X86-NEXT:    orl %edx, %eax
; X86-NEXT:    jne .LBB0_12
; X86-NEXT:  .LBB0_13: # %udiv-loop-exit
; X86-NEXT:    leal {{[0-9]+}}(%esp), %esi
; X86-NEXT:  .LBB0_14: # %udiv-end
; X86-NEXT:    cmpb $0, {{[-0-9]+}}(%e{{[sb]}}p) # 1-byte Folded Reload
; X86-NEXT:    setne (%eax)
; X86-NEXT:    movl %esi, (%eax)
; X86-NEXT:    movb $0, (%eax)
; X86-NEXT:    leal -12(%ebp), %esp
; X86-NEXT:    popl %esi
; X86-NEXT:    popl %edi
; X86-NEXT:    popl %ebx
; X86-NEXT:    popl %ebp
; X86-NEXT:    retl
BB:
  %A30 = alloca i66
  %L17 = load i66, ptr %A30
  %B20 = and i66 %L17, -1
  %G2 = getelementptr i66, ptr %A30, i1 true
  %L10 = load volatile i8, ptr undef
  %L11 = load volatile i8, ptr undef
  %B6 = udiv i8 %L10, %L11
  %C15 = icmp eq i8 %L11, 0
  %B8 = srem i66 0, %B20
  %C2 = icmp ule i66 %B8, %B20
  %B5 = or i8 0, %B6
  %C19 = icmp uge i1 false, %C2
  %C1 = icmp sle i8 undef, %B5
  %B37 = srem i1 %C1, %C2
  %C7 = icmp uge i1 false, %C15
  store i1 %C7, ptr undef
  %G6 = getelementptr i66, ptr %G2, i1 %B37
  store ptr %G6, ptr undef
  %B30 = srem i1 %C19, %C7
  store i1 %B30, ptr undef
  ret void
}

; Similar to above, but bitwidth adjusted to target 32-bit mode. This also shows that we didn't constrain the register class when extracting a subreg.
define void @g() nounwind {
; X64-LABEL: g:
; X64:       # %bb.0: # %BB
; X64-NEXT:    movzbl (%rax), %eax
; X64-NEXT:    cmpb $0, (%rax)
; X64-NEXT:    setne (%rax)
; X64-NEXT:    leaq -{{[0-9]+}}(%rsp), %rax
; X64-NEXT:    movq %rax, (%rax)
; X64-NEXT:    movb $0, (%rax)
; X64-NEXT:    retq
;
; X86-LABEL: g:
; X86:       # %bb.0: # %BB
; X86-NEXT:    pushl %ebp
; X86-NEXT:    movl %esp, %ebp
; X86-NEXT:    andl $-8, %esp
; X86-NEXT:    subl $8, %esp
; X86-NEXT:    movzbl (%eax), %eax
; X86-NEXT:    cmpb $0, (%eax)
; X86-NEXT:    setne (%eax)
; X86-NEXT:    leal -{{[0-9]+}}(%esp), %eax
; X86-NEXT:    movl %eax, (%eax)
; X86-NEXT:    movb $0, (%eax)
; X86-NEXT:    movl %ebp, %esp
; X86-NEXT:    popl %ebp
; X86-NEXT:    retl
BB:
  %A30 = alloca i34
  %L17 = load i34, ptr %A30
  %B20 = and i34 %L17, -1
  %G2 = getelementptr i34, ptr %A30, i1 true
  %L10 = load volatile i8, ptr undef
  %L11 = load volatile i8, ptr undef
  %B6 = udiv i8 %L10, %L11
  %C15 = icmp eq i8 %L11, 0
  %B8 = srem i34 0, %B20
  %C2 = icmp ule i34 %B8, %B20
  %B5 = or i8 0, %B6
  %C19 = icmp uge i1 false, %C2
  %C1 = icmp sle i8 undef, %B5
  %B37 = srem i1 %C1, %C2
  %C7 = icmp uge i1 false, %C15
  store i1 %C7, ptr undef
  %G6 = getelementptr i34, ptr %G2, i1 %B37
  store ptr %G6, ptr undef
  %B30 = srem i1 %C19, %C7
  store i1 %B30, ptr undef
  ret void
}