# RUN: not llc -march=x86 -run-pass liveintervals -o - %s 2>&1 | FileCheck %s
# REQUIRES: asserts

--- |
  define void @func() { ret void }
...
---
# Liveness calculation should detect that we do not have a definition for vreg0
# on all paths; In this example a def for vreg0 is missing when jumping from
# bb.0 to bb.3.
#
# CHECK: Use of %vreg0 does not have a corresponding definition on every path
# CHECK: ERROR: Use not jointly dominated by defs.
name: func
registers:
  - { id: 0, class: gr32 }
body: |
  bb.0:
    successors: %bb.2, %bb.3
    JG_1 %bb.2, implicit %eflags
    JMP_1 %bb.3

  bb.2:
    successors: %bb.3
    %0 = IMPLICIT_DEF
    JMP_1 %bb.3

  bb.3:
    %eax = COPY %0
    RETQ %eax
...