2cc77b2b8a
Summary: In the patch D73152, it adds a new function LiveVariables::addNewBlock. This new function will add the reg which PHI used to the MBB which reg is from. But the new function may cause LiveVariable Verification failed when the Src reg in PHI is undef. Reviewed By: bjope Differential Revision: https://reviews.llvm.org/D80077
26 lines
647 B
YAML
26 lines
647 B
YAML
# RUN: llc -mtriple=aarch64-linux-gnu -verify-machineinstrs -o /dev/null %s \
|
|
# RUN: -run-pass=livevars,phi-node-elimination,twoaddressinstruction \
|
|
# RUN: -no-phi-elim-live-out-early-exit=1 -phi-elim-split-all-critical-edges=1
|
|
|
|
# Used to result in
|
|
#
|
|
# *** Bad machine code: LiveVariables: Block should not be in AliveBlocks ***
|
|
#
|
|
# Just verify that we do not crash (or get verifier error).
|
|
|
|
---
|
|
name: test
|
|
tracksRegLiveness: true
|
|
body: |
|
|
bb.0:
|
|
liveins: $nzcv, $wzr
|
|
Bcc 8, %bb.2, implicit $nzcv
|
|
|
|
bb.1:
|
|
%x:gpr32 = COPY $wzr
|
|
|
|
bb.2:
|
|
%y:gpr32 = PHI %x:gpr32, %bb.1, undef %undef:gpr32, %bb.0
|
|
$wzr = COPY %y:gpr32
|
|
...
|