[PATCH] D76332: Fix MSan false positive due to select folding.

Sanjay Patel via Phabricator via llvm-commits llvm-commits at lists.llvm.org
Wed Mar 18 13:02:13 PDT 2020


spatel added a comment.

In D76332#1929671 <https://reviews.llvm.org/D76332#1929671>, @eugenis wrote:

> Interesting. Poison semantics are very similar to MemorySanitizer model.
>  Should I remove TryToUnfoldSelectInCurrBB completely? I don't see how it can be saved.


I'm looking at a similar question with D76153 <https://reviews.llvm.org/D76153>. Without 'freeze', I suspect we're going to hit perf regressions. But AFAIK, nobody has measured those.


Repository:
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https://reviews.llvm.org/D76332





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