[PATCH] D20807: PR27938: Don't remove valid DebugLoc in Scalarizer

[Karl-Johan Karlsson via llvm-commits]

Ka-Ka created this revision.
Ka-Ka added a reviewer: rsandifo.
Ka-Ka added a subscriber: llvm-commits.

Added checks to make sure the Scalarizer::transferMetadata() don't
remove valid debug location's from instructions. This is important as
the verifier pass require that e.g. inlinable callsites have a valid
debug location.
    
https://llvm.org/bugs/show_bug.cgi?id=27938


http://reviews.llvm.org/D20807

Files:
  lib/Transforms/Scalar/Scalarizer.cpp
  test/Transforms/Scalarizer/dbgloc-bug.ll

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