From 9342b9ccdd3f99ad76cdcb03b4c6f557517dd0d8 Mon Sep 17 00:00:00 2001 From: Nadav Rotem Date: Thu, 6 Jun 2013 22:35:47 +0000 Subject: 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. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@183456 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/Transforms/IPO/PassManagerBuilder.cpp | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) (limited to 'lib/Transforms/IPO/PassManagerBuilder.cpp') diff --git a/lib/Transforms/IPO/PassManagerBuilder.cpp b/lib/Transforms/IPO/PassManagerBuilder.cpp index 986c0b8..8ed7704 100644 --- a/lib/Transforms/IPO/PassManagerBuilder.cpp +++ b/lib/Transforms/IPO/PassManagerBuilder.cpp @@ -32,6 +32,12 @@ static cl::opt RunLoopVectorization("vectorize-loops", cl::desc("Run the Loop vectorization passes")); +// This is a helper flag that we use for testing the profitability of +// vectorization on -O2 and -Os. It should go away once we make a decision. +static cl::opt +VectorizeO2("vectorize-o2", + cl::desc("Enable vectorization on all O levels")); + static cl::opt RunSLPVectorization("vectorize-slp", cl::desc("Run the SLP vectorization passes")); @@ -192,7 +198,7 @@ void PassManagerBuilder::populateModulePassManager(PassManagerBase &MPM) { MPM.add(createLoopIdiomPass()); // Recognize idioms like memset. MPM.add(createLoopDeletionPass()); // Delete dead loops - if (LoopVectorize && OptLevel > 2) + if (LoopVectorize && (OptLevel > 2 || VectorizeO2)) MPM.add(createLoopVectorizePass()); if (!DisableUnrollLoops) -- cgit v1.1