[PATCH] D14632: [MachineSink] Don't break ImplicitNulls

[Sanjoy Das via llvm-commits]

sanjoy created this revision.
sanjoy added reviewers: aadg, reames.
sanjoy added a subscriber: llvm-commits.

This teaches MachineSink to not sink instructions that might break the
implicit null check optimization that runs later.  This should not
affect frontends that do not use implicit null checks.

http://reviews.llvm.org/D14632

Files:
  lib/CodeGen/MachineSink.cpp
  test/CodeGen/X86/machine-sink-and-implicit-null-checks.ll

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