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Expose must/may alias info in MemorySSA.

Description

Expose must/may alias info in MemorySSA.

Summary:
Building MemorySSA gathers alias information for Defs/Uses.
Store and expose this information when optimizing uses (when building MemorySSA),
and when optimizing defs or updating uses (getClobberingMemoryAccess).
Current patch does not propagate alias information through MemoryPhis.

Reviewers: gbiv, dberlin

Subscribers: Prazek, sanjoy, llvm-commits

Differential Revision: https://reviews.llvm.org/D38569

Details

Committed
asbirleaMar 8 2018, 10:03 AM
Differential Revision
D38569: Expose must/may alias info in MemorySSA.
Parents
rL327034: [AMDGPU] fix test to survive the most basic undef constant folding
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