[PATCH] D18625: [Speculation] Add a SpeculativeExecution mode where the pass does nothing unless TTI::hasBranchDivergence() is true.

[Justin Lebar via llvm-commits]

jlebar created this revision.
jlebar added a reviewer: tra.
jlebar added subscribers: chandlerc, rnk, jingyue, llvm-commits.

This lets us add this pass to the IR pass manager unconditionally; it
will simply not do anything on targets without branch divergence.

http://reviews.llvm.org/D18625

Files:
  include/llvm/LinkAllPasses.h
  include/llvm/Transforms/Scalar.h
  lib/Transforms/Scalar/SpeculativeExecution.cpp

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