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Prior to the changes from D52010, clobbering Thumb's high registers in inline asm would cause incorrect code to be generated - or an assertion failure for debug builds. Now that the issue is no longer reproducible, this patch adds a MIR test to cover that scenario. Reviewed By: arsenm Differential Revision: https://reviews.llvm.org/D96335
51 lines
2.1 KiB
YAML
51 lines
2.1 KiB
YAML
# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py
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# RUN: llc -mtriple thumbv6m-arm-none-eabi -run-pass regallocbasic %s -o - | FileCheck %s
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# RUN: llc -mtriple thumbv6m-arm-none-eabi -run-pass greedy %s -o - | FileCheck %s
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# RUN: llc -mtriple thumbv6m-arm-none-eabi -run-pass regallocfast %s -o - | FileCheck %s --check-prefix=FAST
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...
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---
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name: constraint_h
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alignment: 2
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tracksRegLiveness: true
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registers:
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- { id: 0, class: tgpr }
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- { id: 1, class: hgpr }
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- { id: 2, class: tgpr }
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liveins:
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- { reg: '$r0', virtual-reg: '%0' }
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frameInfo:
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maxAlignment: 4
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maxCallFrameSize: 0
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localFrameSize: 4
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stack:
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- { id: 0, size: 4, alignment: 4, local-offset: -4 }
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machineFunctionInfo: {}
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body: |
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bb.0.entry:
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liveins: $r0
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; CHECK-LABEL: name: constraint_h
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; CHECK: liveins: $r0
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; CHECK: [[COPY:%[0-9]+]]:tgpr = COPY $r0
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; CHECK: tSTRspi [[COPY]], %stack.0, 0, 14 /* CC::al */, $noreg
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; CHECK: [[tLDRspi:%[0-9]+]]:tgpr = tLDRspi %stack.0, 0, 14 /* CC::al */, $noreg
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; CHECK: [[COPY1:%[0-9]+]]:hgpr = COPY [[tLDRspi]]
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; CHECK: INLINEASM &"mov r12, $0", 1 /* sideeffect attdialect */, 1048585 /* reguse:GPRnoip_and_GPRwithAPSR_NZCVnosp */, [[COPY1]], 12 /* clobber */, implicit-def early-clobber $r12
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; CHECK: tBX_RET 14 /* CC::al */, $noreg
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; FAST-LABEL: name: constraint_h
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; FAST: liveins: $r0
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; FAST: tSTRspi killed renamable $r0, %stack.0, 0, 14 /* CC::al */, $noreg
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; FAST: renamable $r0 = tLDRspi %stack.0, 0, 14 /* CC::al */, $noreg
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; FAST: renamable $r8 = COPY killed renamable $r0
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; FAST: INLINEASM &"mov r12, $0", 1 /* sideeffect attdialect */, 1048585 /* reguse:GPRnoip_and_GPRwithAPSR_NZCVnosp */, killed renamable $r8, 12 /* clobber */, implicit-def dead early-clobber $r12
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; FAST: tBX_RET 14 /* CC::al */, $noreg
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%0:tgpr = COPY $r0
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tSTRspi %0, %stack.0, 0, 14 /* CC::al */, $noreg
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%2:tgpr = tLDRspi %stack.0, 0, 14 /* CC::al */, $noreg
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%1:hgpr = COPY %2
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INLINEASM &"mov r12, $0", 1 /* sideeffect attdialect */, 1048585 /* reguse:hGPR */, %1, 12 /* clobber */, implicit-def early-clobber $r12
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tBX_RET 14 /* CC::al */, $noreg
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...
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