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# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py
# RUN: llc -mtriple=amdgcn -mcpu=gfx900 -verify-machineinstrs -run-pass=register-coalescer -o - %s | FileCheck -check-prefix=GCN %s
# Test used to crash with message:
# JoinVals::ConflictResolution (anonymous namespace)::JoinVals::analyzeValue(unsigned int, (anonymous namespace)::JoinVals &): Assertion `DefMI != nullptr' failed
---
name: test
tracksRegLiveness: true
body: |
; GCN-LABEL: name: test
; GCN: bb.0:
; GCN-NEXT: successors: %bb.2(0x80000000)
; GCN-NEXT: {{ $}}
; GCN-NEXT: undef [[DEF:%[0-9]+]].sub0:vreg_128 = IMPLICIT_DEF
; GCN-NEXT: [[DEF:%[0-9]+]].sub1:vreg_128 = IMPLICIT_DEF
; GCN-NEXT: S_BRANCH %bb.2
; GCN-NEXT: {{ $}}
; GCN-NEXT: bb.1:
; GCN-NEXT: successors: %bb.2(0x80000000)
; GCN-NEXT: {{ $}}
; GCN-NEXT: [[DEF:%[0-9]+]]:vreg_128 = IMPLICIT_DEF
; GCN-NEXT: {{ $}}
; GCN-NEXT: bb.2:
; GCN-NEXT: [[DEF:%[0-9]+]].sub2:vreg_128 = COPY undef %3:sreg_32
; GCN-NEXT: S_ENDPGM 0, implicit [[DEF]]
bb.0:
undef %0.sub0:vreg_128 = IMPLICIT_DEF
%0.sub1:vreg_128 = IMPLICIT_DEF
%1:vreg_128 = COPY %0
%2:vreg_128 = COPY killed %0
S_BRANCH %bb.2
bb.1:
%1:vreg_128 = COPY killed undef %1
bb.2:
%1.sub2:vreg_128 = COPY undef %3:sreg_32
%2:vreg_128 = COPY killed %1
%4:vreg_128 = COPY killed %2
S_ENDPGM 0, implicit killed %4
...
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