[PATCH] D138585: [SLPVectorizer] Do Not Move Loads/Stores Beyond Stacksave/Stackrestore Boundaries
Alexey Bataev via Phabricator via llvm-commits
llvm-commits at lists.llvm.org
Mon Nov 28 09:18:26 PST 2022
ABataev added a comment.
In D138585#3953869 <https://reviews.llvm.org/D138585#3953869>, @reames wrote:
> Can you explain why memory dependence wasn't enough to prevent the problematic reordering? I'm a bit fuzzy on the details - it's been a while - but I though that stacksave and stackrestore were modeled as modifying all memory to prevent this reordering?
Did a quick search - looks like it does not work for static allocas, only for dynamic
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