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
Sanjoy Das