[PATCH] D35474: SSAUpdater: Add mode when Phi creation is not allowed

[Serguei Katkov via Phabricator via llvm-commits]

skatkov created this revision.

Add one more parameter to SSAUpdater to disable PHI node creation.
SSAUpdater will find a Phi node if it exists but will return undef value if
new Phi node should be created.

By default the behavior is not changed. Phi nodes can be created.

I need this patch for implementation of PR26223.


https://reviews.llvm.org/D35474

Files:
  include/llvm/Transforms/Utils/SSAUpdater.h
  include/llvm/Transforms/Utils/SSAUpdaterImpl.h
  lib/Transforms/Utils/SSAUpdater.cpp

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