tree 7cac7b2c0de5b5a0807b76c669c9a6ed67a5ecbc
parent 68712f5591e9784e47069fdecb074f34e718c152
author Luke Lau <luke@igalia.com> 1714479640 +0800
committer Copybara-Service <copybara-worker@google.com> 1714480139 -0700

[DAGCombiner] Fix mayAlias not accounting for scalable MMOs with offsets (#90573)

In #70452 DAGCombiner::mayAlias was taught to handle scalable sizes, but
when it checks via AA->isNoAlias it didn't take into account the case
where the size is scalable but there was an offset too.

For the fixed length case the offset was just accounted for by adding to
the LocationSize, but for the scalable case there doesn't seem to be a
way to represent both a scalable and fixed part in it. So this patch
works around it by bailing if there is an offset.

Fixes #90559

GitOrigin-RevId: 5e03c0af4745b97f93c06b43e0f2a02abc881292