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| author | pvanhout <pierre.vanhoutryve@amd.com> | 2023-05-22 11:15:15 +0200 |
|---|---|---|
| committer | pvanhout <pierre.vanhoutryve@amd.com> | 2023-05-22 13:40:26 +0200 |
| commit | fa87dd52d4327ad7313e924c1f27b9321fb253d2 (patch) | |
| tree | 007162523aafd6d78a6429c747761cac0897d58d /lldb/source/Plugins/ScriptInterpreter/Python/PythonDataObjects.cpp | |
| parent | 61346ed51fdab0314694f3dbbf6563bc2cc9cde2 (diff) | |
[AMDGPU] Handle multiple occurences of an incoming value in break large PHIs
We naively broke all incoming values, assuming they'd be unique.
However it's not illegal to have multiple occurences of, e.g. `[BB0, V0]`
in a PHI node. What's illegal though is having the same basic block
multiple times but with different values, and it's exactly what the
transform caused. This broke in some rare applications where the pattern
arised.
Now we cache the `BasicBlock, Value` pairs we're breaking so we can reuse the values and preserve this invariant.
Solves SWDEV-399460
Reviewed By: #amdgpu, rovka
Differential Revision: https://reviews.llvm.org/D151069
Diffstat (limited to 'lldb/source/Plugins/ScriptInterpreter/Python/PythonDataObjects.cpp')
0 files changed, 0 insertions, 0 deletions