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archived-llvm/lib/Transforms/IPO
Michael Zolotukhin b084468f7e Add CFG Simplification pass after Loop Unswitching.
Loop unswitching produces conditional branches with constant condition,
and it's beneficial for later passes to clean this up with simplify-cfg.
We do this after the second invocation of loop-unswitch, but not after
the first one. Not doing so might cause problem for passes like
LoopUnroll, whose estimate of loop body size would be less accurate.

Reviewers: hfinkel

Differential Revision: http://reviews.llvm.org/D13064

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@248460 91177308-0d34-0410-b5e6-96231b3b80d8
2015-09-24 03:50:17 +00:00
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