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0a08f60d7f
There is no justification for changing vcc_lo to vcc when shrinking V_CNDMASK, and such a change could later confuse live variable analysis. Make sure the original register is preserved. Differential Revision: https://reviews.llvm.org/D86541
23 lines
901 B
YAML
23 lines
901 B
YAML
# RUN: llc -march=amdgcn -mcpu=gfx1010 -run-pass=si-shrink-instructions --verify-machineinstrs %s -o - | FileCheck %s
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# Make sure the implicit vcc_lo of V_CNDMASK is preserved and not promoted to vcc.
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---
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name: shrink_cndmask_implicit_vcc_lo
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tracksRegLiveness: true
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body: |
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bb.0:
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liveins: $vgpr0, $vgpr1
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; CHECK-LABEL: name: shrink_cndmask_implicit_vcc_lo
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; CHECK: [[COPY:%[0-9]+]]:vgpr_32 = COPY $vgpr0
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; CHECK: [[COPY1:%[0-9]+]]:vgpr_32 = COPY $vgpr0
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; CHECK: V_CMP_LT_I32_e32 0, [[COPY]], implicit-def $vcc_lo, implicit $exec
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; CHECK: V_CNDMASK_B32_e32 0, [[COPY1]], implicit $vcc_lo, implicit $exec
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%0:vgpr_32 = COPY $vgpr0
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%1:vgpr_32 = COPY $vgpr0
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V_CMP_LT_I32_e32 0, %0:vgpr_32, implicit-def $vcc_lo, implicit $exec, implicit-def $vcc
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%2:vgpr_32 = V_CNDMASK_B32_e64 0, 0, 0, %1:vgpr_32, $vcc_lo, implicit $exec
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S_NOP 0
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...
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