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324d0de803
Regalloc creates COPY instructions which do not formally use VALU. That results in v_mov instructions displaced after exec mask modification. One pass which do it is SIOptimizeExecMasking, but potentially it can be done by other passes too. This patch adds a pass immediately after regalloc to add implicit exec use operand to all VGPR copy instructions. Differential Revision: https://reviews.llvm.org/D28874 llvm-svn: 292956
45 lines
1.3 KiB
YAML
45 lines
1.3 KiB
YAML
# RUN: llc -march=amdgcn -start-after=greedy -stop-after=si-optimize-exec-masking -o - %s | FileCheck %s
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# Check that we first do all vector instructions and only then change exec
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# CHECK-DAG: COPY %vgpr10_vgpr11
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# CHECK-DAG: COPY %vgpr12_vgpr13
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# CHECK: %exec = COPY
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---
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name: main
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alignment: 0
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exposesReturnsTwice: false
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legalized: false
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regBankSelected: false
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selected: false
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tracksRegLiveness: true
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liveins:
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- { reg: '%sgpr4_sgpr5' }
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- { reg: '%sgpr6' }
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- { reg: '%vgpr0' }
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frameInfo:
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isFrameAddressTaken: false
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isReturnAddressTaken: false
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hasStackMap: false
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hasPatchPoint: false
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stackSize: 0
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offsetAdjustment: 0
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maxAlignment: 4
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adjustsStack: false
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hasCalls: false
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maxCallFrameSize: 0
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hasOpaqueSPAdjustment: false
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hasVAStart: false
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hasMustTailInVarArgFunc: false
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body: |
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bb.0.entry:
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liveins: %vgpr3, %vgpr10_vgpr11, %vgpr12_vgpr13
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%vcc = V_CMP_NE_U32_e64 0, killed %vgpr3, implicit %exec
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%sgpr4_sgpr5 = COPY %exec, implicit-def %exec
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%sgpr6_sgpr7 = S_AND_B64 %sgpr4_sgpr5, killed %vcc, implicit-def dead %scc
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%sgpr4_sgpr5 = S_XOR_B64 %sgpr6_sgpr7, killed %sgpr4_sgpr5, implicit-def dead %scc
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%vgpr61_vgpr62 = COPY %vgpr10_vgpr11
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%vgpr155_vgpr156 = COPY %vgpr12_vgpr13
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%exec = S_MOV_B64_term killed %sgpr6_sgpr7
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...
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