[PATCH] D133891: [SLP]Improve isUndefVector function by adding insertelement analysis.

Wed Sep 21 08:01:31 PDT 2022

ABataev added a comment.

In D133891#3803891 <https://reviews.llvm.org/D133891#3803891>, @srj wrote:

> The line numbers in the ASAN trace are slightly different from this patch, but the culprit seems to be:
>
>   SmallVector<int> InsertMask(NumElts, UndefMaskElem);
>   copy(Mask, std::next(InsertMask.begin(), OffsetBeg));    <-- THIS LINE
>
> Not sure about the semantics here, but presumably InsertMask doesn't have the capacity for the copy and gets tromped on...

Must be fixed in e664dea1821ab1277e62f0b4074fb02867636e6e <https://reviews.llvm.org/rGe664dea1821ab1277e62f0b4074fb02867636e6e>

Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D133891/new/

https://reviews.llvm.org/D133891