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Introduce Simple Analysis interface for loop passes.
Right now, this interface provides hooks for only to operations, 1) clone basic block 2) delete value. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40625 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -63,6 +63,21 @@ class LoopPass : public Pass {
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virtual PassManagerType getPotentialPassManagerType() const {
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return PMT_LoopPassManager;
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}
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//===--------------------------------------------------------------------===//
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/// SimpleAnalysis - Provides simple interface to update analysis info
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/// maintained by various passes. Note, if required this interface can
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/// be extracted into a separate abstract class but it would require
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/// additional use of multiple inheritance in Pass class hierarcy, someting
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/// we are trying to avoid.
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/// Each loop pass can override these simple analysis hookss to update
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/// desired analysis information.
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/// cloneBasicBlockAnalysis - Clone analysis info associated with basic block.
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virtual void cloneBasicBlockAnalysis(BasicBlock *F, BasicBlock *T, Loop *L) {}
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/// deletekAnalysisValue - Delete analysis info associated with value V.
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virtual void deleteAnalysisValue(Value *V, Loop *L) {}
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};
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class LPPassManager : public FunctionPass, public PMDataManager {
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@ -115,6 +130,20 @@ public:
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// utility may send LPPassManager into infinite loops so use caution.
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void redoLoop(Loop *L);
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//===--------------------------------------------------------------------===//
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/// SimpleAnalysis - Provides simple interface to update analysis info
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/// maintained by various passes. Note, if required this interface can
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/// be extracted into a separate abstract class but it would require
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/// additional use of multiple inheritance in Pass class hierarcy, someting
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/// we are trying to avoid.
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/// cloneBasicBlockSimpleAnalysis - Invoke cloneBasicBlockAnalysis hook for
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/// all passes that implement simple analysis interface.
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void cloneBasicBlockSimpleAnalysis(BasicBlock *From, BasicBlock *To, Loop *L);
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/// deleteSimpleAnalysisValue - Invoke deleteAnalysisValue hook for all passes
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/// that implement simple analysis interface.
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void deleteSimpleAnalysisValue(Value *V, Loop *L);
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private:
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std::deque<Loop *> LQ;
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bool skipThisLoop;
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@ -140,6 +140,27 @@ void LPPassManager::redoLoop(Loop *L) {
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redoThisLoop = true;
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}
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/// cloneBasicBlockSimpleAnalysis - Invoke cloneBasicBlockAnalysis hook for
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/// all loop passes.
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void LPPassManager::cloneBasicBlockSimpleAnalysis(BasicBlock *From,
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BasicBlock *To, Loop *L) {
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for (unsigned Index = 0; Index < getNumContainedPasses(); ++Index) {
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Pass *P = getContainedPass(Index);
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LoopPass *LP = dynamic_cast<LoopPass *>(P);
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LP->cloneBasicBlockAnalysis(From, To, L);
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}
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}
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/// deleteSimpleAnalysisValue - Invoke deleteAnalysisValue hook for all passes.
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void LPPassManager::deleteSimpleAnalysisValue(Value *V, Loop *L) {
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for (unsigned Index = 0; Index < getNumContainedPasses(); ++Index) {
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Pass *P = getContainedPass(Index);
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LoopPass *LP = dynamic_cast<LoopPass *>(P);
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LP->deleteAnalysisValue(V, L);
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}
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}
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// Recurse through all subloops and all loops into LQ.
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static void addLoopIntoQueue(Loop *L, std::deque<Loop *> &LQ) {
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LQ.push_back(L);
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