Sanjoy Das 16901a3e20 [MachineSink] Don't break ImplicitNulls ...

Summary:
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.

Reviewers: aadg, reames, hfinkel, atrick

Subscribers: majnemer, llvm-commits

Differential Revision: http://reviews.llvm.org/D14632

llvm-svn: 258254

2016-01-20 00:06:14 +00:00

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