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opt: Mirror vectorization presets of clang

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clang enables vectorization at optimization levels > 1 and size level < 2. opt
should behave similarily.

Loop vectorization and SLP vectorization can be disabled with the flags
-disable-(loop/slp)-vectorization.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@196294 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Arnold Schwaighofer
2013-12-03 16:33:06 +00:00
parent ac07cd54ed
commit df9c9da884
3 changed files with 72 additions and 2 deletions
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16
tools/opt/opt.cpp
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@ -139,6 +139,16 @@ static cl::opt<bool>
DisableLoopUnrolling("disable-loop-unrolling",
cl::desc("Disable loop unrolling in all relevant passes"),
cl::init(false));
static cl::opt<bool>
DisableLoopVectorization("disable-loop-vectorization",
cl::desc("Disable the loop vectorization pass"),
cl::init(false));
static cl::opt<bool>
DisableSLPVectorization("disable-slp-vectorization",
cl::desc("Disable the slp vectorization pass"),
cl::init(false));
static cl::opt<bool>
DisableSimplifyLibCalls("disable-simplify-libcalls",
@ -461,8 +471,10 @@ static void AddOptimizationPasses(PassManagerBase &MPM,FunctionPassManager &FPM,
Builder.DisableUnrollLoops = (DisableLoopUnrolling.getNumOccurrences() > 0) ?
DisableLoopUnrolling : OptLevel == 0;
Builder.LoopVectorize = OptLevel > 1 && SizeLevel < 2;
Builder.SLPVectorize = true;
Builder.LoopVectorize =
DisableLoopVectorization ? false : OptLevel > 1 && SizeLevel < 2;
Builder.SLPVectorize =
DisableSLPVectorization ? false : OptLevel > 1 && SizeLevel < 2;
Builder.populateFunctionPassManager(FPM);
Builder.populateModulePassManager(MPM);