[PATCH] D21997: [LCSSA] Post-process PHI-nodes created by SSAUpdate when constructing LCSSA form.

[Michael Zolotukhin via llvm-commits]

mzolotukhin created this revision.
mzolotukhin added reviewers: sanjoy, chandlerc, hfinkel.
mzolotukhin added a subscriber: llvm-commits.

SSAUpdate might insert PHI-nodes inside loops, which can break LCSSA
form unless we fix it up.

This fixes PR28424.

http://reviews.llvm.org/D21997

Files:
  lib/Transforms/Utils/LCSSA.cpp
  test/Transforms/LCSSA/pr28424.ll

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