test/CodeGen/AMDGPU/opt_exec_copy_fold.mir

# RUN: llc -run-pass si-optimize-exec-masking-pre-ra -march=amdgcn -verify-machineinstrs -o - %s | FileCheck --check-prefixes=GCN %s
---
# GCN-LABEL: name: opt_exec_copy_fold
# GCN:             %2:vreg_64 = COPY $exec
name:            opt_exec_copy_fold
tracksRegLiveness: true
liveins:
  - { reg: '$sgpr0_sgpr1' }
body:             |
  bb.0:
    liveins: $sgpr0_sgpr1

    %0:vgpr_32 = V_CNDMASK_B32_e64 0, 0, 0, 1, $sgpr0_sgpr1, implicit $exec
    %1:sreg_64 = V_CMP_NE_U32_e64 0, %0, implicit $exec
    %2:vreg_64 = COPY $exec
    %3:sreg_64 = V_CMP_EQ_U64_e64 %1, %2, implicit $exec
    $scc = COPY %3
    S_CBRANCH_SCC0 %bb.1, implicit $scc
  
  bb.1:
...