| Issue |
135998
|
| Summary |
[X86][AVX2] X86FixupVectorConstantsPass - performance regression
|
| Labels |
new issue
|
| Assignees |
|
| Reporter |
nurmukhametov
|
Moving ISPC from LLVM 18 to LLVM 20, I have encountered performance regression for a few of our benchmarks for ISPC target avx2 (corresponds to `-mcpu=haswell`). It seems to be caused by #122601. It is around ~20-25%, as measured on Intel CPUs i9-12900 and 8360Y.
Compiler explorer link: https://godbolt.org/z/qx8s6K6br
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