[PATCH] D57180: [LV] Avoid adding into interleaved group in presence of WAW dependency

[Anna Thomas via Phabricator via llvm-commits]

anna created this revision.
anna added reviewers: hsaito, Ayal, mkazantsev, fhahn.
Herald added a subscriber: rkruppe.

Fix for miscompile when we ignore the store ordering when adding stores
into the interleaved store group.
Fix for PR40291.
Test case shows we now add stores into the interleaved store group only
if we prove there is no WAW dependency.
This is a cleaned up fix suggested by @hsaito.


Repository:
  rL LLVM

https://reviews.llvm.org/D57180

Files:
  lib/Analysis/VectorUtils.cpp
  test/Transforms/LoopVectorize/interleaved-accesses-waw-dependency.ll

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