llvm/llvm/test/CodeGen/AMDGPU/invert-br-undef-vcc.mir

# RUN: llc -run-pass block-placement -mtriple=amdgcn -verify-machineinstrs -o - %s | FileCheck %s
--- |

  define amdgpu_kernel void @invert_br_undef_vcc(float %cond, ptr addrspace(1) %out) #0 {
  entry:
    br i1 undef, label %if, label %else, !structurizecfg.uniform !0, !amdgpu.uniform !0

  else:                                             ; preds = %entry
    store volatile i32 100, ptr addrspace(1) undef
    br label %done, !structurizecfg.uniform !0

  if:                                               ; preds = %entry
    store volatile i32 9, ptr addrspace(1) undef
    br label %done, !structurizecfg.uniform !0

  done:                                             ; preds = %if, %else
    %value = phi i32 [ 0, %if ], [ 1, %else ]
    store i32 %value, ptr addrspace(1) %out
    ret void
  }

  attributes #0 = { nounwind }

  !0 = !{}

...
---
# CHECK-LABEL: name: invert_br_undef_vcc
# CHECK: S_CBRANCH_VCCZ %bb.1, implicit undef $vcc

name:            invert_br_undef_vcc
alignment:       1
exposesReturnsTwice: false
legalized:       false
regBankSelected: false
selected:        false
tracksRegLiveness: true
liveins:
  - { reg: '$sgpr0_sgpr1' }
frameInfo:
  isFrameAddressTaken: false
  isReturnAddressTaken: false
  hasStackMap:     false
  hasPatchPoint:   false
  stackSize:       0
  offsetAdjustment: 0
  maxAlignment:    0
  adjustsStack:    false
  hasCalls:        false
  maxCallFrameSize: 0
  hasOpaqueSPAdjustment: false
  hasVAStart:      false
  hasMustTailInVarArgFunc: false
body:             |
  bb.0.entry:
    liveins: $sgpr0_sgpr1

    $sgpr0_sgpr1 = S_LOAD_DWORDX2_IMM killed $sgpr0_sgpr1, 11, 0 :: (non-temporal dereferenceable invariant load (s64) from `ptr addrspace(4) undef`)
    $sgpr7 = S_MOV_B32 61440
    $sgpr6 = S_MOV_B32 -1
    S_CBRANCH_VCCNZ %bb.2, implicit undef $vcc

  bb.1.else:
    liveins: $sgpr6, $sgpr7, $sgpr0_sgpr1_sgpr2_sgpr3:0x00000003

    $vgpr0 = V_MOV_B32_e32 100, implicit $exec
    BUFFER_STORE_DWORD_OFFSET killed $vgpr0, killed $sgpr4_sgpr5_sgpr6_sgpr7, 0, 0, 0, 0, implicit $exec :: (volatile store (s32) into `ptr addrspace(1) undef`)
    $vgpr0 = V_MOV_B32_e32 1, implicit $exec
    S_BRANCH %bb.3

  bb.2.if:
    liveins: $sgpr6, $sgpr7, $sgpr0_sgpr1_sgpr2_sgpr3:0x00000003

    $vgpr0 = V_MOV_B32_e32 9, implicit $exec
    BUFFER_STORE_DWORD_OFFSET killed $vgpr0, killed $sgpr4_sgpr5_sgpr6_sgpr7, 0, 0, 0, 0, implicit $exec :: (volatile store (s32) into `ptr addrspace(1) undef`)
    $vgpr0 = V_MOV_B32_e32 0, implicit $exec

  bb.3.done:
    liveins: $vgpr0, $sgpr0_sgpr1_sgpr2_sgpr3:0x00000003

    $sgpr3 = S_MOV_B32 61440
    $sgpr2 = S_MOV_B32 -1
    BUFFER_STORE_DWORD_OFFSET killed $vgpr0, killed $sgpr0_sgpr1_sgpr2_sgpr3, 0, 0, 0, 0, implicit $exec :: (store (s32) into %ir.out)
    S_ENDPGM 0

...