[PATCH] D15135: Extend the use of @llvm.invariant.start/end intrinsics for GVN-based load elimination purposes to also handle global variables.

[Larisse Voufo via llvm-commits]

lvoufo created this revision.
lvoufo added reviewers: reames, nlewycky, chandlerc.
lvoufo added a subscriber: llvm-commits.

The -globalopt pass  is made to require -invariant-info-marker, similarly to -gvn. (Note: Both -gvn and -globalopt require basic AA.)

The test case is also expanded to illustrate the subtle nuances and expected similarities between local and global variables.


http://reviews.llvm.org/D15135

Files:
  lib/Transforms/IPO/GlobalOpt.cpp
  test/Transforms/LoadElim/invariant.ll

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