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Re-commit optimization bisect support (r267022) without new pass manager…

Authored by andrew.w.kaylor on Apr 22 2016, 3:06 PM.

Description

Re-commit optimization bisect support (r267022) without new pass manager support.

The original commit was reverted because of a buildbot problem with LazyCallGraph::SCC handling (not related to the OptBisect handling).

Differential Revision: http://reviews.llvm.org/D19172

llvm-svn: 267231