File: greedy-broken-ssa-verifier-error.mir

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# RUN: llc -march=amdgcn -mcpu=gfx1030 -verify-machineinstrs -run-pass=greedy -stress-regalloc=2 %s -o - | FileCheck -check-prefix=GCN %s

# Make sure there's no verifier error after register allocation
# introduces vreg defs when the MIR parser infers SSA.

---
name: ra_introduces_vreg_def
tracksRegLiveness: true
machineFunctionInfo:
  scratchRSrcReg:  '$sgpr0_sgpr1_sgpr2_sgpr3'
  frameOffsetReg:  '$sgpr33'
  stackPtrOffsetReg: '$sgpr32'
  argumentInfo:
    privateSegmentBuffer: { reg: '$sgpr0_sgpr1_sgpr2_sgpr3' }
body:             |
  ; GCN-LABEL: name: ra_introduces_vreg_def
  ; GCN: [[COPY_V0:%[0-9]+]]:vgpr_32 = COPY $vgpr0
  ; GCN: [[COPY_V0]]:vgpr_32 =
  bb.0:
    liveins: $vgpr0, $vgpr1
    %0:vgpr_32 = COPY $vgpr0
    %1:vgpr_32 = COPY $vgpr1
    S_NOP 0, implicit %0
    S_NOP 0, implicit %1

  bb.1:
    $vgpr0 = V_MOV_B32_e32 0, implicit $exec
    $vgpr1 = V_MOV_B32_e32 1, implicit $exec
    S_NOP 0, implicit %0
    S_NOP 0, implicit %1

  bb.2:
    S_CBRANCH_EXECNZ %bb.1, implicit $exec

  bb.3:
    $exec_lo = S_OR_B32 $exec_lo, undef $sgpr4, implicit-def $scc
    $vgpr0 = COPY %0
    S_SETPC_B64_return undef $sgpr30_sgpr31, implicit $vgpr0

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