# RUN: not llc -mtriple=amdgcn-amd-amdhsa -verify-machineinstrs -o /dev/null %s 2>&1 | FileCheck -check-prefix=ERROR %s

# 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.


# ERROR: *** Bad machine code: Using an undefined physical register ***
# ERROR: instruction: S_ENDPGM implicit %0:vgpr_32, implicit $vcc
# ERROR: operand 1:   implicit $vcc

...

name: invalid_implicit_physreg_use_with_implicit_virtreg
tracksRegLiveness: true

body:             |
  bb.0:
    %0:vgpr_32 = IMPLICIT_DEF
    S_ENDPGM implicit %0, implicit $vcc

...