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SimplifyCFG: Use parallel-and and parallel-or mode to consolidate branch conditions

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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
This commit is contained in:
Tom Stellard
2013-07-27 00:01:07 +00:00
parent 018696db45
commit 57e6b2d1f3
17 changed files with 628 additions and 39 deletions
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3
tools/opt/opt.cpp
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@ -667,6 +667,9 @@ int main(int argc, char **argv) {
FPasses.reset(new FunctionPassManager(M.get()));
if (TD)
FPasses->add(new DataLayout(*TD));
if (TM.get())
TM->addAnalysisPasses(*FPasses);
}
if (PrintBreakpoints) {