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| author | Mikael Holmen <mikael.holmen@ericsson.com> | 2019-11-15 10:29:47 +0100 |
|---|---|---|
| committer | Mikael Holmen <mikael.holmen@ericsson.com> | 2019-11-15 11:13:37 +0100 |
| commit | 1587c7e86f1c58e3f692f0a418e5df6aeb754bb0 (patch) | |
| tree | 633f77e1db0afcb5d73b7f6d3e76cf761890dab9 /lldb/packages/Python/lldbsuite/test/python_api/thread/main2.cpp | |
| parent | 1643734741d2f2957206774a50960ba335a36a0c (diff) | |
| download | bcm5719-llvm-1587c7e86f1c58e3f692f0a418e5df6aeb754bb0.tar.gz bcm5719-llvm-1587c7e86f1c58e3f692f0a418e5df6aeb754bb0.zip | |
[Scalarizer] Treat values from unreachable blocks as undef
Summary:
When scalarizing PHI nodes we might try to examine/rewrite
InsertElement nodes in predecessors. If those predecessors
are unreachable from entry, then the IR in those blocks could
have unexpected properties resulting in infinite loops in
Scatterer::operator[].
By simply treating values originating from instructions in
unreachable blocks as undef we do not need to analyse them
further.
This fixes PR41723.
Reviewers: bjope
Reviewed By: bjope
Subscribers: bjope, hiraditya, llvm-commits
Tags: #llvm
Differential Revision: https://reviews.llvm.org/D70171
Diffstat (limited to 'lldb/packages/Python/lldbsuite/test/python_api/thread/main2.cpp')
0 files changed, 0 insertions, 0 deletions
