llvm/test/CodeGen/Thumb/high-reg-clobber.mir

# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py
# RUN: llc -mtriple thumbv6m-arm-none-eabi -run-pass regallocbasic %s -o - | FileCheck %s
# RUN: llc -mtriple thumbv6m-arm-none-eabi -run-pass greedy %s -o - | FileCheck %s
# RUN: llc -mtriple thumbv6m-arm-none-eabi -run-pass regallocfast %s -o - | FileCheck %s --check-prefix=FAST

...
---
name:            constraint_h
alignment:       2
tracksRegLiveness: true
registers:
  - { id: 0, class: tgpr }
  - { id: 1, class: hgpr }
  - { id: 2, class: tgpr }
liveins:
  - { reg: '$r0', virtual-reg: '%0' }
frameInfo:
  maxAlignment:    4
  maxCallFrameSize: 0
  localFrameSize:  4
stack:
  - { id: 0, size: 4, alignment: 4, local-offset: -4 }
machineFunctionInfo: {}
body:             |
  bb.0.entry:
    liveins: $r0

    ; CHECK-LABEL: name: constraint_h
    ; CHECK: liveins: $r0
    ; CHECK: [[COPY:%[0-9]+]]:tgpr = COPY $r0
    ; CHECK: tSTRspi [[COPY]], %stack.0, 0, 14 /* CC::al */, $noreg
    ; CHECK: [[tLDRspi:%[0-9]+]]:tgpr = tLDRspi %stack.0, 0, 14 /* CC::al */, $noreg
    ; CHECK: [[COPY1:%[0-9]+]]:hgpr = COPY [[tLDRspi]]
    ; CHECK: INLINEASM &"mov r12, $0", 1 /* sideeffect attdialect */, 1048585 /* reguse:GPRnoip_and_GPRnopc */, %1, 12 /* clobber */, implicit-def early-clobber $r12
    ; CHECK: tBX_RET 14 /* CC::al */, $noreg
    ; FAST-LABEL: name: constraint_h
    ; FAST: liveins: $r0
    ; FAST: tSTRspi killed renamable $r0, %stack.0, 0, 14 /* CC::al */, $noreg
    ; FAST: renamable $r0 = tLDRspi %stack.0, 0, 14 /* CC::al */, $noreg
    ; FAST: renamable $r8 = COPY killed renamable $r0
    ; FAST: INLINEASM &"mov r12, $0", 1 /* sideeffect attdialect */, 1048585 /* reguse:GPRnoip_and_GPRnopc */, killed renamable $r8, 12 /* clobber */, implicit-def dead early-clobber $r12
    ; FAST: tBX_RET 14 /* CC::al */, $noreg
    %0:tgpr = COPY $r0
    tSTRspi %0, %stack.0, 0, 14 /* CC::al */, $noreg
    %2:tgpr = tLDRspi %stack.0, 0, 14 /* CC::al */, $noreg
    %1:hgpr = COPY %2
    INLINEASM &"mov r12, $0", 1 /* sideeffect attdialect */, 1048585 /* reguse:hGPR */, %1, 12 /* clobber */, implicit-def early-clobber $r12
    tBX_RET 14 /* CC::al */, $noreg

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