[PATCH] D46059: [Scalarizer] Remove unreachable blocks before scalarizing a function

[Bjorn Pettersson via Phabricator via llvm-commits]

bjope created this revision.

When scalarizing PHI nodes we might try to examine/rewrite
InsertElement nodes in predecessors. If those predecessors
are unreachable from entry, then the IR in those blocks could
have unexpected properties resulting in infinite loops in
Scatterer::operator[]. So we better remove unreachable blocks
before scalarizing the function.


Repository:
  rL LLVM

https://reviews.llvm.org/D46059

Files:
  lib/Transforms/Scalar/Scalarizer.cpp
  test/Transforms/Scalarizer/phi_unreachable_pred.ll

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