llvm/test/CodeGen/AMDGPU/shrink-instructions-illegal-fold.mir

# RUN: llc -mtriple=amdgcn -mcpu=gfx900 -run-pass=si-shrink-instructions --verify-machineinstrs %s -o - | FileCheck %s
# RUN: llc -mtriple=amdgcn -mcpu=gfx900 -passes=si-shrink-instructions --verify-machineinstrs %s -o - | FileCheck %s

# Make sure immediate folding into V_CNDMASK respects constant bus restrictions.
---

name:            shrink_cndmask_illegal_imm_folding
tracksRegLiveness: true
body:             |
  bb.0:
    liveins: $vgpr0, $vgpr1
    ; CHECK-LABEL: name: shrink_cndmask_illegal_imm_folding
    ; CHECK: [[COPY:%[0-9]+]]:vgpr_32 = COPY $vgpr0
    ; CHECK: [[MOV:%[0-9]+]]:vgpr_32 = V_MOV_B32_e32 32768, implicit $exec
    ; CHECK: V_CMP_EQ_U32_e32 0, [[COPY]], implicit-def $vcc, implicit $exec
    ; CHECK: V_CNDMASK_B32_e32 [[MOV]], killed [[COPY]], implicit $vcc, implicit $exec

    %0:vgpr_32 = COPY $vgpr0
    %1:vgpr_32 = V_MOV_B32_e32 32768, implicit $exec
    V_CMP_EQ_U32_e32 0, %0:vgpr_32, implicit-def $vcc, implicit $exec
    %2:vgpr_32 = V_CNDMASK_B32_e64 0, %1:vgpr_32, 0, killed %0:vgpr_32, $vcc, implicit $exec
    S_NOP 0

...