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D3348 - [BUG] "Rotate Loop" pass kills "llvm.vectorizer.enable" metadata

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@206266 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Alexey Bataev
2014-04-15 09:37:30 +00:00
parent 47b284ce35
commit 15cbb64eb4
3 changed files with 110 additions and 6 deletions
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20
lib/Transforms/Vectorize/LoopVectorize.cpp
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@ -1067,7 +1067,8 @@ struct LoopVectorize : public FunctionPass {
return false;
if (DL == NULL) {
DEBUG(dbgs() << "LV: Not vectorizing: Missing data layout\n");
DEBUG(dbgs() << "\nLV: Not vectorizing " << F.getName()
<< ": Missing data layout\n");
return false;
}
@ -1090,13 +1091,20 @@ struct LoopVectorize : public FunctionPass {
bool processLoop(Loop *L) {
assert(L->empty() && "Only process inner loops.");
DEBUG(dbgs() << "LV: Checking a loop in \""
DEBUG(dbgs() << "\nLV: Checking a loop in \""
<< L->getHeader()->getParent()->getName() << "\" from "
<< getDebugLocString(L->getHeader()->getFirstNonPHIOrDbg())
<< "\n");
LoopVectorizeHints Hints(L, DisableUnrolling);
DEBUG(dbgs() << "LV: Loop hints:"
<< " force=" << (Hints.Force == 0
? "disabled"
: (Hints.Force == 1 ? "enabled" : "?"))
<< " width=" << Hints.Width << " unroll=" << Hints.Unroll
<< "\n");
if (Hints.Force == 0) {
DEBUG(dbgs() << "LV: Not vectorizing: #pragma vectorize disable.\n");
return false;
@ -1150,10 +1158,10 @@ struct LoopVectorize : public FunctionPass {
}
// Select the optimal vectorization factor.
LoopVectorizationCostModel::VectorizationFactor VF;
VF = CM.selectVectorizationFactor(OptForSize, Hints.Width);
const LoopVectorizationCostModel::VectorizationFactor VF =
CM.selectVectorizationFactor(OptForSize, Hints.Width);
// Select the unroll factor.
unsigned UF = CM.selectUnrollFactor(OptForSize, Hints.Unroll, VF.Width,
const unsigned UF = CM.selectUnrollFactor(OptForSize, Hints.Unroll, VF.Width,
VF.Cost);
DEBUG(dbgs() << "LV: Found a vectorizable loop ("
@ -5076,7 +5084,7 @@ LoopVectorizationCostModel::selectVectorizationFactor(bool OptForSize,
}
}
DEBUG(dbgs() << "LV: Selecting VF = : "<< Width << ".\n");
DEBUG(dbgs() << "LV: Selecting VF: "<< Width << ".\n");
Factor.Width = Width;
Factor.Cost = Width * Cost;
return Factor;