[PATCH] D140100: [SLP]Integrate looking through shuffles logic into ShuffleInstructionBuilder.
Alexander Kornienko via Phabricator via llvm-commits
llvm-commits at lists.llvm.org
Tue Jan 3 13:35:07 PST 2023
alexfh added a comment.
In D140100#4018269 <https://reviews.llvm.org/D140100#4018269>, @asmok-g wrote:
> Heads-up: This has caused a change in behavior when using `#pragma unroll` in some test using SIMD. In other words, using `#pragma unroll` results in a different output than without it. I'm preparing a reduced test case.
I've got a reduced IR file for that case: F26088275: q.ll <https://reviews.llvm.org/F26088275>
$ old-clang -O2 q.ll && ./a.out
0.0
$ new-clang -O2 q.ll && ./a.out
5.0
Please fix or revert the patch, if there's no trivial fix.
Thanks!
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https://reviews.llvm.org/D140100/new/
https://reviews.llvm.org/D140100
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