[PATCH] D38619: [GVN] Prevent ScalarPRE from hoisting across instructions that don't pass control flow to successors

[Max Kazantsev via Phabricator via llvm-commits]

mkazantsev created this revision.

This is to address a problem similar to those in https://reviews.llvm.org/D37460 for Scalar PRE. We should not
PRE across an instruction that may not pass execution to its successor unless it is safe
to speculatively execute it.


https://reviews.llvm.org/D38619

Files:
  lib/Transforms/Scalar/GVN.cpp
  test/Transforms/GVN/PRE/local-pre.ll

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