llvm-project/llvm/test/CodeGen/AMDGPU/fold-sgpr-copy.mir

# RUN: llc -march=amdgcn -mcpu=gfx900 -run-pass=si-fold-operands,dead-mi-elimination -verify-machineinstrs %s -o - | FileCheck -check-prefix=GCN %s

---

# GCN-LABEL: name: fold_sgpr_to_sgpr_copy_full
# GCN:      %0:sgpr_32 = IMPLICIT_DEF
# GCN-NEXT: S_STORE_DWORD_IMM %0, undef $sgpr10_sgpr11, 0, 0

name:            fold_sgpr_to_sgpr_copy_full
body:             |
  bb.0:

    %0:sgpr_32 = IMPLICIT_DEF
    %1:sgpr_32 = COPY %0
    %2:sgpr_32 = COPY %1
    S_STORE_DWORD_IMM %2, undef $sgpr10_sgpr11, 0, 0
...

# GCN-LABEL: name: fold_sgpr_to_sgpr_copy_subreg
# GCN:      %0:sreg_64 = IMPLICIT_DEF
# GCN-NEXT: %2:sgpr_32 = COPY %0.sub0
# GCN-NEXT: S_STORE_DWORD_IMM %2, undef $sgpr10_sgpr11, 0, 0

name:            fold_sgpr_to_sgpr_copy_subreg
body:             |
  bb.0:

    %0:sreg_64 = IMPLICIT_DEF
    %1:sgpr_32 = COPY %0.sub0
    %2:sgpr_32 = COPY %1
    S_STORE_DWORD_IMM %2, undef $sgpr10_sgpr11, 0, 0
...

# GCN-LABEL: name: fold_sgpr_to_sgpr_copy_subreg2
# GCN:      %0:sreg_64 = IMPLICIT_DEF
# GCN-NEXT: %3:sreg_32_xm0_xexec = COPY %0.sub0
# GCN-NEXT: S_STORE_DWORD_IMM %3, undef $sgpr10_sgpr11, 0, 0

name:            fold_sgpr_to_sgpr_copy_subreg2
body:             |
  bb.0:

    %0:sreg_64 = IMPLICIT_DEF
    %1:sgpr_32 = COPY %0.sub0
    %2:sgpr_32 = COPY %1
    %3:sreg_32_xm0_xexec = COPY %2
    S_STORE_DWORD_IMM %3, undef $sgpr10_sgpr11, 0, 0
...