src/llvm-project/llvm/test/CodeGen/AMDGPU/rewrite-partial-reg-uses.mir

# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py
# RUN: llc -mtriple=amdgcn-amd-amdhsa -amdgpu-enable-rewrite-partial-reg-uses=true -verify-machineinstrs -start-before=rename-independent-subregs -stop-after=rewrite-partial-reg-uses %s -o - | FileCheck -check-prefix=CHECK %s
---
name: test_subregs_composition_vreg_1024
tracksRegLiveness: true
body:             |
  bb.0:
    ; CHECK-LABEL: name: test_subregs_composition_vreg_1024
    ; CHECK: undef [[V_MOV_B32_e32_:%[0-9]+]].sub0:vreg_96 = V_MOV_B32_e32 1, implicit $exec
    ; CHECK-NEXT: [[V_MOV_B32_e32_:%[0-9]+]].sub1:vreg_96 = V_MOV_B32_e32 2, implicit $exec
    ; CHECK-NEXT: S_NOP 0, implicit [[V_MOV_B32_e32_]].sub0_sub1
    ; CHECK-NEXT: S_NOP 0, implicit [[V_MOV_B32_e32_]].sub1_sub2
    ; CHECK-NEXT: undef [[V_MOV_B32_e32_1:%[0-9]+]].sub0:vreg_128 = V_MOV_B32_e32 11, implicit $exec
    ; CHECK-NEXT: [[V_MOV_B32_e32_1:%[0-9]+]].sub1:vreg_128 = V_MOV_B32_e32 12, implicit $exec
    ; CHECK-NEXT: S_NOP 0, implicit [[V_MOV_B32_e32_1]].sub0_sub1_sub2
    ; CHECK-NEXT: S_NOP 0, implicit [[V_MOV_B32_e32_1]].sub1_sub2_sub3
    ; CHECK-NEXT: undef [[V_MOV_B32_e32_2:%[0-9]+]].sub0:vreg_160 = V_MOV_B32_e32 21, implicit $exec
    ; CHECK-NEXT: [[V_MOV_B32_e32_2:%[0-9]+]].sub1:vreg_160 = V_MOV_B32_e32 22, implicit $exec
    ; CHECK-NEXT: S_NOP 0, implicit [[V_MOV_B32_e32_2]].sub0_sub1_sub2_sub3
    ; CHECK-NEXT: S_NOP 0, implicit [[V_MOV_B32_e32_2]].sub1_sub2_sub3_sub4
    ; CHECK-NEXT: undef [[V_MOV_B32_e32_3:%[0-9]+]].sub0:vreg_192 = V_MOV_B32_e32 31, implicit $exec
    ; CHECK-NEXT: [[V_MOV_B32_e32_3:%[0-9]+]].sub1:vreg_192 = V_MOV_B32_e32 32, implicit $exec
    ; CHECK-NEXT: S_NOP 0, implicit [[V_MOV_B32_e32_3]].sub0_sub1_sub2_sub3_sub4
    ; CHECK-NEXT: S_NOP 0, implicit [[V_MOV_B32_e32_3]].sub1_sub2_sub3_sub4_sub5
    ; CHECK-NEXT: undef [[V_MOV_B32_e32_4:%[0-9]+]].sub0:vreg_256 = V_MOV_B32_e32 41, implicit $exec
    ; CHECK-NEXT: [[V_MOV_B32_e32_4:%[0-9]+]].sub2:vreg_256 = V_MOV_B32_e32 43, implicit $exec
    ; CHECK-NEXT: S_NOP 0, implicit [[V_MOV_B32_e32_4]].sub0_sub1_sub2_sub3_sub4_sub5
    ; CHECK-NEXT: S_NOP 0, implicit [[V_MOV_B32_e32_4]].sub2_sub3_sub4_sub5_sub6_sub7
    undef %0.sub1:vreg_1024 = V_MOV_B32_e32 01, implicit $exec
    %0.sub2:vreg_1024 = V_MOV_B32_e32 02, implicit $exec
    S_NOP 0, implicit %0.sub1_sub2
    S_NOP 0, implicit %0.sub2_sub3

    undef %1.sub1:vreg_1024 = V_MOV_B32_e32 11, implicit $exec
    %1.sub2:vreg_1024 = V_MOV_B32_e32 12, implicit $exec
    S_NOP 0, implicit %1.sub1_sub2_sub3
    S_NOP 0, implicit %1.sub2_sub3_sub4

    undef %2.sub1:vreg_1024 = V_MOV_B32_e32 21, implicit $exec
    %2.sub2:vreg_1024 = V_MOV_B32_e32 22, implicit $exec
    S_NOP 0, implicit %2.sub1_sub2_sub3_sub4
    S_NOP 0, implicit %2.sub2_sub3_sub4_sub5

    undef %3.sub1:vreg_1024 = V_MOV_B32_e32 31, implicit $exec
    %3.sub2:vreg_1024 = V_MOV_B32_e32 32, implicit $exec
    S_NOP 0, implicit %3.sub1_sub2_sub3_sub4_sub5
    S_NOP 0, implicit %3.sub2_sub3_sub4_sub5_sub6

    undef %4.sub1:vreg_1024 = V_MOV_B32_e32 41, implicit $exec
    %4.sub3:vreg_1024 = V_MOV_B32_e32 43, implicit $exec
    S_NOP 0, implicit %4.sub1_sub2_sub3_sub4_sub5_sub6
    S_NOP 0, implicit %4.sub3_sub4_sub5_sub6_sub7_sub8
...
---
name: test_subregs_unknown_regclass_from_instructions
tracksRegLiveness: true
body:             |
  bb.0:
    ; CHECK-LABEL: name: test_subregs_unknown_regclass_from_instructions
    ; CHECK: undef [[S_MOV_B32_:%[0-9]+]].sub0:sgpr_64 = S_MOV_B32 1
    ; CHECK-NEXT: [[S_MOV_B32_:%[0-9]+]].sub1:sgpr_64 = S_MOV_B32 2
    ; CHECK-NEXT: dead [[COPY:%[0-9]+]]:vreg_64 = COPY [[S_MOV_B32_]]
    undef %0.sub4:sgpr_1024 = S_MOV_B32 01
    %0.sub5:sgpr_1024 = S_MOV_B32 02
    %1:vreg_64 = COPY %0.sub4_sub5
...
---
name: test_subregs_unknown_regclass_from_instructions_sgpr_1024_to_sgpr_64
tracksRegLiveness: true
registers:
  - { id: 0, class: sgpr_1024 }
body:             |
  bb.0:
    ; CHECK-LABEL: name: test_subregs_unknown_regclass_from_instructions_sgpr_1024_to_sgpr_64
    ; CHECK: dead [[COPY:%[0-9]+]]:vreg_64 = COPY undef %2:sgpr_64
    %1:vreg_64 = COPY undef %0.sub4_sub5
...
---
name: test_subregs_regclass_defined_by_dst_operand_sreg_64_xexec
tracksRegLiveness: true
body:             |
  bb.0:
    ; CHECK-LABEL: name: test_subregs_regclass_defined_by_dst_operand_sreg_64_xexec
    ; CHECK: [[S_LOAD_DWORDX2_IMM:%[0-9]+]]:sgpr_64 = S_LOAD_DWORDX2_IMM undef %1:sreg_64, 0, 0
    ; CHECK-NEXT: dead [[COPY:%[0-9]+]]:vreg_64 = COPY [[S_LOAD_DWORDX2_IMM]]
    undef %0.sub2_sub3:sgpr_128 = S_LOAD_DWORDX2_IMM undef %1:sreg_64, 0, 0
    %2:vreg_64 = COPY %0.sub2_sub3:sgpr_128
...
---
name: test_vgpr_selected_instead_of_sgpr_because_use_allows_both
tracksRegLiveness: true
body:             |
  bb.0:
    ; CHECK-LABEL: name: test_vgpr_selected_instead_of_sgpr_because_use_allows_both
    ; CHECK: [[COPY:%[0-9]+]]:sgpr_32 = COPY undef %1:sgpr_32
    ; CHECK-NEXT: dead [[V_LSHL_ADD_U32_e64_:%[0-9]+]]:vgpr_32 = V_LSHL_ADD_U32_e64 [[COPY]], 2, undef %3:vgpr_32, implicit $exec
    undef %1.sub1:sgpr_96 = COPY undef %0:sgpr_32
    %3:vgpr_32 = V_LSHL_ADD_U32_e64 %1.sub1:sgpr_96, 2, undef %2:vgpr_32, implicit $exec
...