David Stenberg 0af67e5b65 [SimplifyCFG] Fix a debug invariant bug in FoldBranchToCommonDest() ...

Summary:
Fix a case where FoldBranchToCommonDest() would bail out from doing CSE
when encountering a debug intrinsic. Handle that by skipping past the
debug intrinsics.

Also, as a minor refactoring, rename checkCSEInPredecessor() to
tryCSEWithPredecessor() to make it a bit more clear that the function
may remove instructions.

Reviewers: fhahn, craig.topper, dblaikie, xbolva00

Reviewed By: fhahn, xbolva00

Subscribers: vsk, davide, llvm-commits

Differential Revision: https://reviews.llvm.org/D46635

llvm-svn: 332698

2018-05-18 08:52:15 +00:00

231 KiB

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