Tom Stellard 57e6b2d1f3 SimplifyCFG: Use parallel-and and parallel-or mode to consolidate branch conditions ...

Merge consecutive if-regions if they contain identical statements.
Both transformations reduce number of branches.  The transformation
is guarded by a target-hook, and is currently enabled only for +R600,
but the correctness has been tested on X86 target using a variety of
CPU benchmarks.

Patch by: Mei Ye

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@187278 91177308-0d34-0410-b5e6-96231b3b80d8

2013-07-27 00:01:07 +00:00

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