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Jeffrey Yasskin volunteered to benchmark the vectorizer on -O2 or -Os when compiling chrome. This patch adds a new flag to enable vectorization on all levels and not only on -O3. It should go away once we make a decision.
llvm-svn: 183456
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@ -32,6 +32,12 @@ static cl::opt<bool>
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RunLoopVectorization("vectorize-loops",
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cl::desc("Run the Loop vectorization passes"));
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// This is a helper flag that we use for testing the profitability of
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// vectorization on -O2 and -Os. It should go away once we make a decision.
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static cl::opt<bool>
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VectorizeO2("vectorize-o2",
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cl::desc("Enable vectorization on all O levels"));
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static cl::opt<bool>
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RunSLPVectorization("vectorize-slp",
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cl::desc("Run the SLP vectorization passes"));
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@ -192,7 +198,7 @@ void PassManagerBuilder::populateModulePassManager(PassManagerBase &MPM) {
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MPM.add(createLoopIdiomPass()); // Recognize idioms like memset.
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MPM.add(createLoopDeletionPass()); // Delete dead loops
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if (LoopVectorize && OptLevel > 2)
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if (LoopVectorize && (OptLevel > 2 || VectorizeO2))
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MPM.add(createLoopVectorizePass());
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if (!DisableUnrollLoops)
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