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Enable the loop vectorizer only on O2 and above. (Still disabled by default)
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169774 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -188,7 +188,7 @@ 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)
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if (LoopVectorize && OptLevel > 1)
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MPM.add(createLoopVectorizePass());
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if (!DisableUnrollLoops)
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