llvm-project

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# RUN: not --crash llc -mtriple=amdgcn-amd-amdhsa -verify-machineinstrs -o /dev/null %s 2>&1 | FileCheck -check-prefix=ERROR %s
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# REQUIRES: amdgpu-registered-target
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# When the verifier was detecting the invalid liveness for vcc, it would assert when trying to iterate the subregisters of the implicit virtual register use.
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# ERROR: *** Bad machine code: Using an undefined physical register ***
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# ERROR: instruction: S_ENDPGM 0, implicit %0:vgpr_32, implicit $vcc
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# ERROR: operand 2:   implicit $vcc
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...
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name: invalid_implicit_physreg_use_with_implicit_virtreg
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tracksRegLiveness: true
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body:             |
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  bb.0:
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    %0:vgpr_32 = IMPLICIT_DEF
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    S_ENDPGM 0, implicit %0, implicit $vcc
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...
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