llvm/test/CodeGen/X86/tied-depbreak.mir

# RUN: llc -mtriple=x86_64-unknown-linux-gnu -mcpu=slm -run-pass post-RA-sched -o - %s | FileCheck %s
#
# Verify that the critical antidependence breaker does not partially
# replace tied operands

--- |

  define void @main() { ret void }

...
---
# CHECK-LABEL: main
name:            main
alignment:       16
exposesReturnsTwice: false
legalized:       false
regBankSelected: false
selected:        false
failedISel:      false
tracksRegLiveness: true
hasWinCFI:       false
registers:       []
liveins:
  - { reg: '$edi', virtual-reg: '' }
  - { reg: '$esi', virtual-reg: '' }
frameInfo:
  isFrameAddressTaken: false
  isReturnAddressTaken: false
  hasStackMap:     false
  hasPatchPoint:   false
  stackSize:       0
  offsetAdjustment: 0
  maxAlignment:    1
  adjustsStack:    false
  hasCalls:        false
  stackProtector:  ''
  maxCallFrameSize: 0
  cvBytesOfCalleeSavedRegisters: 0
  hasOpaqueSPAdjustment: false
  hasVAStart:      false
  hasMustTailInVarArgFunc: false
  localFrameSize:  0
  savePoint:       ''
  restorePoint:    ''
fixedStack:      []
stack:           []
callSites:       []
debugValueSubstitutions: []
constants:       []
machineFunctionInfo: {}
body:             |
  bb.0:
    liveins: $edi, $esi

    $eax = MOV32rr $esi
    $eax = LEA64_32r $rdi, 1, $rsi, 0, $noreg
    $edi = MOV32rr $esi
    $esi = MOV32ri 4
    ; Verify that XOR is untouched by the dependency breaker
    ; CHECK: $esi = XOR32rr undef $esi, undef $esi, implicit-def dead $eflags, implicit-def $rsi
    $esi = XOR32rr undef $esi, undef $esi, implicit-def dead $eflags, implicit-def $rsi
    RET64 killed $eax

...