test/CodeGen/AMDGPU/fold_16bit_imm.mir

# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py
# RUN: llc -mtriple=amdgcn--amdhsa -mcpu=gfx908 -verify-machineinstrs -run-pass peephole-opt -o - %s | FileCheck -check-prefix=GCN %s

---
name:            fold_simm_16_sub_to_lo
body:             |
  bb.0:

    ; GCN-LABEL: name: fold_simm_16_sub_to_lo
    ; GCN: [[S_MOV_B32_:%[0-9]+]]:sreg_32 = S_MOV_B32 2048
    ; GCN-NEXT: [[COPY:%[0-9]+]]:sgpr_lo16 = COPY killed [[S_MOV_B32_]].lo16
    ; GCN-NEXT: SI_RETURN_TO_EPILOG [[COPY]]
    %0:sreg_32 = S_MOV_B32 2048
    %1:sgpr_lo16 = COPY killed %0.lo16
    SI_RETURN_TO_EPILOG %1

...

---
name:            fold_simm_16_sub_to_phys
body:             |
  bb.0:

    ; GCN-LABEL: name: fold_simm_16_sub_to_phys
    ; GCN: [[S_MOV_B32_:%[0-9]+]]:sreg_32 = S_MOV_B32 2048
    ; GCN-NEXT: $sgpr0 = S_MOV_B32 2048
    ; GCN-NEXT: SI_RETURN_TO_EPILOG $sgpr0_lo16
    %0:sreg_32 = S_MOV_B32 2048
    $sgpr0_lo16 = COPY killed %0.lo16
    SI_RETURN_TO_EPILOG $sgpr0_lo16

...

---
name:            fold_aimm_16_sub_to_phys
body:             |
  bb.0:

    ; GCN-LABEL: name: fold_aimm_16_sub_to_phys
    ; GCN: [[S_MOV_B32_:%[0-9]+]]:sreg_32 = S_MOV_B32 0
    ; GCN-NEXT: $agpr0 = V_ACCVGPR_WRITE_B32_e64 0, implicit $exec
    ; GCN-NEXT: SI_RETURN_TO_EPILOG $agpr0_lo16
    %0:sreg_32 = S_MOV_B32 0
    $agpr0_lo16 = COPY killed %0.lo16
    SI_RETURN_TO_EPILOG $agpr0_lo16

...

---
name:            fold_vimm_16_sub_to_lo
body:             |
  bb.0:

    ; GCN-LABEL: name: fold_vimm_16_sub_to_lo
    ; GCN: [[S_MOV_B32_:%[0-9]+]]:sreg_32 = S_MOV_B32 2048
    ; GCN-NEXT: [[COPY:%[0-9]+]]:vgpr_lo16 = COPY killed [[S_MOV_B32_]].lo16
    ; GCN-NEXT: SI_RETURN_TO_EPILOG [[COPY]]
    %0:sreg_32 = S_MOV_B32 2048
    %1:vgpr_lo16 = COPY killed %0.lo16
    SI_RETURN_TO_EPILOG %1

...

---
name:            fold_vimm_16_sub_to_phys
body:             |
  bb.0:

    ; GCN-LABEL: name: fold_vimm_16_sub_to_phys
    ; GCN: [[S_MOV_B32_:%[0-9]+]]:sreg_32 = S_MOV_B32 2048
    ; GCN-NEXT: $vgpr0_lo16 = COPY killed [[S_MOV_B32_]].lo16
    ; GCN-NEXT: SI_RETURN_TO_EPILOG $vgpr0_lo16
    %0:sreg_32 = S_MOV_B32 2048
    $vgpr0_lo16 = COPY killed %0.lo16
    SI_RETURN_TO_EPILOG $vgpr0_lo16

...