llvm/test/tools/llvm-reduce/mir/instr-reduce-dead-def.mir

# REQUIRES: amdgpu-registered-target
# RUN: llvm-reduce -abort-on-invalid-reduction -simplify-mir --delta-passes=instructions -mtriple=amdgcn-amd-amdhsa --test FileCheck --test-arg --check-prefix=CHECK-INTERESTINGNESS --test-arg %s --test-arg --input-file %s -o %t 2> %t.log
# RUN: FileCheck --check-prefix=RESULT %s < %t

# CHECK-INTERESTINGNESS-LABEL: name: dead_def
# CHECK-INTERESTINGNESS: S_ENDPGM

# Make sure no IMPLICIT_DEF is introduced for dead operands.
# RESULT: bb.0
# RESULT-NEXT: S_ENDPGM

---
name: dead_def
tracksRegLiveness: true
body:             |
  bb.0:
    S_WAITCNT 0
    dead %0:vgpr_32 = V_MOV_B32_e32 0, implicit $exec
    S_ENDPGM 0
...

# CHECK-INTERESTINGNESS-LABEL: name: prev_def_rc_is_dead
# CHECK-INTERESTINGNESS: V_MOV_B32_e32
# CHECK-INTERESTINGNESS: V_MOV_B32_e32
# CHECK-INTERESTINGNESS: V_MOV_B32_e32

# RESULT: %0:vgpr_32 = V_MOV_B32_e32 0, implicit $exec
# RESULT-NEXT: dead %1:vgpr_32 = V_MOV_B32_e32 %0, implicit $exec
# RESULT-NEXT: %2:vgpr_32 = V_MOV_B32_e32 %0, implicit $exec
---
name: prev_def_rc_is_dead
tracksRegLiveness: true
body:             |
  bb.0:
    S_WAITCNT 0
    %0:vgpr_32 = V_MOV_B32_e32 0, implicit $exec
    dead %1:vgpr_32 = V_MOV_B32_e32 %0, implicit $exec
    %2:vgpr_32 = V_MOV_B32_e32 %0, implicit $exec
    S_ENDPGM 0, implicit %2
...