llvm/test/CodeGen/AMDGPU/skip-fold-regsequence.mir

# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py
# RUN: llc -mtriple=amdgcn-amd-amdhsa -mcpu=gfx90a -verify-machineinstrs -run-pass si-fold-operands -o - %s | FileCheck -check-prefix=GCN %s
# RUN: llc -mtriple=amdgcn-amd-amdhsa -mcpu=gfx90a -verify-machineinstrs -passes si-fold-operands -o - %s | FileCheck -check-prefix=GCN %s

# Skip folding a REG_SEQUENCE to its user when the regclasses for the user operands can't be
# fully determined from the instruction description.
---
name:            regsequence_with_regsequence_use_op
tracksRegLiveness: true
body:             |
  bb.0:
    liveins: $agpr0, $agpr1

    ; GCN-LABEL: name: regsequence_with_regsequence_use_op
    ; GCN: liveins: $agpr0, $agpr1
    ; GCN-NEXT: {{  $}}
    ; GCN-NEXT: [[COPY:%[0-9]+]]:vgpr_32 = COPY $agpr0
    ; GCN-NEXT: [[COPY1:%[0-9]+]]:vgpr_32 = COPY $agpr1
    ; GCN-NEXT: [[REG_SEQUENCE:%[0-9]+]]:vreg_64_align2 = REG_SEQUENCE [[COPY]], %subreg.sub0, [[COPY1]], %subreg.sub1
    ; GCN-NEXT: [[DEF:%[0-9]+]]:vgpr_32 = IMPLICIT_DEF
    ; GCN-NEXT: [[REG_SEQUENCE1:%[0-9]+]]:vreg_96_align2 = REG_SEQUENCE killed [[REG_SEQUENCE]], %subreg.sub0_sub1, killed [[DEF]], %subreg.sub2
    ; GCN-NEXT: S_ENDPGM 0, implicit [[REG_SEQUENCE1]]
    %0:vgpr_32 = COPY $agpr0
    %1:vgpr_32 = COPY $agpr1
    %2:vreg_64_align2 = REG_SEQUENCE %0:vgpr_32, %subreg.sub0, %1:vgpr_32, %subreg.sub1
    %3:vgpr_32 = IMPLICIT_DEF
    %4:vreg_96_align2 = REG_SEQUENCE killed %2:vreg_64_align2, %subreg.sub0_sub1, killed %3:vgpr_32, %subreg.sub2
    S_ENDPGM 0, implicit %4
...
---
name:            insert_subreg_with_regsequence_use_op
tracksRegLiveness: true
body:             |
  bb.0:
    liveins: $agpr0, $agpr1

    ; GCN-LABEL: name: insert_subreg_with_regsequence_use_op
    ; GCN: liveins: $agpr0, $agpr1
    ; GCN-NEXT: {{  $}}
    ; GCN-NEXT: [[COPY:%[0-9]+]]:vgpr_32 = COPY $agpr0
    ; GCN-NEXT: [[COPY1:%[0-9]+]]:vgpr_32 = COPY $agpr1
    ; GCN-NEXT: [[REG_SEQUENCE:%[0-9]+]]:vreg_64_align2 = REG_SEQUENCE [[COPY]], %subreg.sub0, [[COPY1]], %subreg.sub1
    ; GCN-NEXT: S_NOP 0, implicit-def %3
    ; GCN-NEXT: [[INSERT_SUBREG:%[0-9]+]]:vreg_64_align2 = INSERT_SUBREG %3, [[REG_SEQUENCE]], %subreg.sub0_sub1
    ; GCN-NEXT: S_ENDPGM 0, implicit [[INSERT_SUBREG]]
    %0:vgpr_32 = COPY $agpr0
    %1:vgpr_32 = COPY $agpr1
    %2:vreg_64_align2 = REG_SEQUENCE %0:vgpr_32, %subreg.sub0, %1:vgpr_32, %subreg.sub1
    S_NOP 0, implicit-def %3:vreg_64_align2
    %4:vreg_64_align2 = INSERT_SUBREG %3, %2, %subreg.sub0_sub1
    S_ENDPGM 0, implicit %4
...