2019-12-17 20:20:32 +08:00
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# RUN: llc -march=amdgcn -mcpu=gfx908 -run-pass=postra-machine-sink -verify-machineinstrs -o - %s | FileCheck %s
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# Don't sink copy that writes sub-register of another copy source register
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# CHECK-LABEL: name: donotsinkcopy
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# CHECK-LABEL: bb.0:
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# CHECK: renamable $sgpr1 = COPY renamable $sgpr2
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# CHECK-LABEL: bb.1:
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2020-02-29 04:28:45 +08:00
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# CHECK: liveins: $sgpr0_sgpr1:0x0000000000000003
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2019-12-17 20:20:32 +08:00
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# CHECK: renamable $vgpr1_vgpr2 = COPY renamable $sgpr0_sgpr1
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---
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name: donotsinkcopy
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tracksRegLiveness: true
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body: |
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bb.0:
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liveins: $sgpr0, $sgpr2, $vgpr3
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S_CMP_LT_U32 renamable $sgpr2, target-flags(amdgpu-gotprel32-lo) 2, implicit-def $scc
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renamable $sgpr1 = COPY renamable $sgpr2
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renamable $vgpr1_vgpr2 = COPY renamable $sgpr0_sgpr1
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S_CBRANCH_SCC0 %bb.2, implicit $scc
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bb.1:
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liveins: $vgpr2, $sgpr0_sgpr1:0x00000001
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S_BRANCH %bb.4
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bb.2:
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liveins: $sgpr1
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bb.4:
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S_ENDPGM 0
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...
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