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32 lines
899 B
YAML
32 lines
899 B
YAML
# RUN: llc -o - %s -mtriple=amdgcn-amd-amdhsa-opencl -run-pass=simple-register-coalescing | FileCheck %s
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---
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# Checks for a bug where subregister liveranges were not properly pruned for
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# an IMPLCITI_DEF that gets removed completely.
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#
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# CHECK-LABEL: name: func
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# IMPLICIT_DEF should be gone without llc hitting assertion failures.
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# CHECK-NOT: IMPLICIT_DEF
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name: func
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tracksRegLiveness: true
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body: |
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bb.0:
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undef %5.sub1 = V_MOV_B32_e32 0, implicit %exec
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%6 = COPY %5
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S_CBRANCH_VCCZ %bb.2, implicit undef %vcc
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bb.1:
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%1 : sreg_32_xm0 = S_MOV_B32 0
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undef %0.sub0 : sreg_64 = COPY %1
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%0.sub1 = COPY %1
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%4 : vreg_64 = COPY killed %0
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%5 : vreg_64 = IMPLICIT_DEF
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%6 : vreg_64 = COPY killed %4
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bb.2:
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%2 : vgpr_32 = V_CVT_F32_I32_e32 killed %5.sub1, implicit %exec
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bb.3:
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%3 : vgpr_32 = V_CVT_F32_I32_e32 killed %6.sub1, implicit %exec
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S_ENDPGM
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...
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