File: invalid-liveness.mir

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llvm-toolchain-19 1%3A19.1.7-3
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# RUN: not --crash llc -mtriple=i686-- -run-pass liveintervals -o - %s 2>&1 | FileCheck %s
# RUN: not --crash llc -mtriple=i686-- --passes='print<live-intervals>' -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 %0
# on all paths; In this example a def for %0 is missing when jumping from
# bb.0 to bb.3.
#
# CHECK: Use of %0 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:
    JCC_1 %bb.2, 15, implicit $eflags
    JMP_1 %bb.3

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

  bb.3:
    $eax = COPY %0
    RET64 $eax
...