[PATCH] D44571: [CGP] Avoid segmentation fault when doing PHI node simplifications

[Bjorn Pettersson via Phabricator via llvm-commits]

bjope updated this revision to Diff 139018.
bjope added a comment.

Basically moved the solution from https://reviews.llvm.org/rL327250 into SimplificationTracker::ReplacePhi. This avoids the need for the DenseSet (with non-deterministic iteration) that was added in https://reviews.llvm.org/rL327250.

I also made sure that we recursively check if the new replacement already have been replaced when doing the simplifications for "already matched" nodes.


Repository:
  rL LLVM

https://reviews.llvm.org/D44571

Files:
  lib/CodeGen/CodeGenPrepare.cpp

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