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[LoopAccesses] Split out LoopAccessReport from VectorizerReport

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The only difference between these two is that VectorizerReport adds a
vectorizer-specific prefix to its messages.  When LAA is used in the
vectorizer context the prefix is added when we promote the
LoopAccessReport into a VectorizerReport via one of the constructors.

This is part of the patchset that converts LoopAccessAnalysis into an
actual analysis pass.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@229632 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Adam Nemet
2015-02-18 03:44:25 +00:00
parent 69c9697fa7
commit c548c640bc
3 changed files with 56 additions and 34 deletions
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33
lib/Transforms/Vectorize/LoopVectorize.cpp
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@ -224,6 +224,21 @@ class LoopVectorizationLegality;
class LoopVectorizationCostModel;
class LoopVectorizeHints;
/// \brief This modifies LoopAccessReport to initialize message with
/// loop-vectorizer-specific part.
class VectorizationReport : public LoopAccessReport {
public:
VectorizationReport(Instruction *I = nullptr)
: LoopAccessReport("loop not vectorized: ", I) {}
/// \brief This allows promotion of the loop-access analysis report into the
/// loop-vectorizer report. It modifies the message to add the
/// loop-vectorizer-specific part of the message.
explicit VectorizationReport(const LoopAccessReport &R)
: LoopAccessReport(Twine("loop not vectorized: ") + R.str(),
R.getInstr()) {}
};
/// InnerLoopVectorizer vectorizes loops which contain only one basic
/// block to a specified vectorization factor (VF).
/// This class performs the widening of scalars into vectors, or multiple
@ -835,9 +850,11 @@ private:
void collectStridedAccess(Value *LoadOrStoreInst);
/// Report an analysis message to assist the user in diagnosing loops that are
/// not vectorized.
void emitAnalysis(const VectorizationReport &Message) {
VectorizationReport::emitAnalysis(Message, TheFunction, TheLoop, LV_NAME);
/// not vectorized. These are handled as LoopAccessReport rather than
/// VectorizationReport because the << operator of VectorizationReport returns
/// LoopAccessReport.
void emitAnalysis(const LoopAccessReport &Message) {
LoopAccessReport::emitAnalysis(Message, TheFunction, TheLoop, LV_NAME);
}
unsigned NumPredStores;
@ -972,9 +989,11 @@ private:
bool isConsecutiveLoadOrStore(Instruction *I);
/// Report an analysis message to assist the user in diagnosing loops that are
/// not vectorized.
void emitAnalysis(const VectorizationReport &Message) {
VectorizationReport::emitAnalysis(Message, TheFunction, TheLoop, LV_NAME);
/// not vectorized. These are handled as LoopAccessReport rather than
/// VectorizationReport because the << operator of VectorizationReport returns
/// LoopAccessReport.
void emitAnalysis(const LoopAccessReport &Message) {
LoopAccessReport::emitAnalysis(Message, TheFunction, TheLoop, LV_NAME);
}
/// Values used only by @llvm.assume calls.
@ -3837,7 +3856,7 @@ bool LoopVectorizationLegality::canVectorizeMemory() {
LAI = &LAA->getInfo(TheLoop, Strides);
auto &OptionalReport = LAI->getReport();
if (OptionalReport)
emitAnalysis(*OptionalReport);
emitAnalysis(VectorizationReport(*OptionalReport));
return LAI->canVectorizeMemory();
}