[PATCH] D134323: AtomicExpand: Avoid some operations if the atomic is overaligned

[Matt Arsenault via Phabricator via llvm-commits]

arsenm created this revision.
arsenm added reviewers: reames, jyknight, jdoerfert, rampitec.
Herald added subscribers: kosarev, kerbowa, jrtc27, fedor.sergeev, hiraditya, jvesely.
Herald added a project: All.
arsenm requested review of this revision.
Herald added a subscriber: wdng.
Herald added a project: LLVM.

Let some of the pointer bithacking fold away if we know the LSB are 0.


https://reviews.llvm.org/D134323

Files:
  llvm/lib/CodeGen/AtomicExpandPass.cpp
  llvm/test/Transforms/AtomicExpand/AMDGPU/expand-atomic-i16.ll
  llvm/test/Transforms/AtomicExpand/AMDGPU/expand-atomic-i8.ll
  llvm/test/Transforms/AtomicExpand/SPARC/partword.ll

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