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Mark vector loops as already vectorized

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Make sure we mark all loops (scalar and vector) when vectorizing,
so that we don't try to vectorize them anymore. Also, set unroll
to 1, since this is what we check for on early exit.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@193349 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Renato Golin
2013-10-24 14:50:51 +00:00
parent 43752f2d4f
commit d6aa89eca5
3 changed files with 53 additions and 2 deletions
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4
lib/Transforms/Vectorize/LoopVectorize.cpp
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@ -801,6 +801,7 @@ struct LoopVectorizeHints {
Vals.push_back(LoopID->getOperand(i));
Vals.push_back(createHint(Context, Twine(Prefix(), "width").str(), Width));
Vals.push_back(createHint(Context, Twine(Prefix(), "unroll").str(), 1));
MDNode *NewLoopID = MDNode::get(Context, Vals);
// Set operand 0 to refer to the loop id itself.
@ -1785,6 +1786,9 @@ InnerLoopVectorizer::createEmptyLoop(LoopVectorizationLegality *Legal) {
LoopExitBlock = ExitBlock;
LoopVectorBody = VecBody;
LoopScalarBody = OldBasicBlock;
LoopVectorizeHints Hints(Lp, true);
Hints.setAlreadyVectorized(Lp);
}
/// This function returns the identity element (or neutral element) for