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| author | Phoebe Wang <phoebe.wang@intel.com> | 2023-10-29 21:55:00 +0800 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2023-10-29 21:55:00 +0800 |
| commit | b5281afe42246680ede4d563227df3657d501028 (patch) | |
| tree | 65e8cae4a0360f557eb4c08d28001255a0549ce4 /llvm/lib/Bitcode/Reader/BitcodeReader.cpp | |
| parent | f8fe40090ab302921bc4b83969bfec8b31c902aa (diff) | |
[X86] Avoid returning the same shuffle operation for broadcast (#70592)
This is to fix a crash since aab8b2eb080d, which generates a new pattern
```
t35: v8i32 = xor t11, t14
t36: v8i32 = vector_shuffle<0,1,0,1,0,1,0,1> t35, undef:v8i32
```
The pattern exposed a bug introduced since f885c08034, which breaks
element widen but doesn't handle the broadcast case.
The patch just solved the crash issue. I observed performance regression
cased by above patches in the test, which may need further
investigation.
Diffstat (limited to 'llvm/lib/Bitcode/Reader/BitcodeReader.cpp')
0 files changed, 0 insertions, 0 deletions