X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=include%2Fllvm%2FPassAnalysisSupport.h;h=b09ba45e346d3b9bdfdc44925f273ce4414fa3cc;hb=b6d667403fed489ef92174b3f19d4b87db5c39f7;hp=d2aec0bbc9202b6578c3675c1c7836234c22c04a;hpb=3f2577decba715615597352c4b3e2a551d44b64c;p=oota-llvm.git diff --git a/include/llvm/PassAnalysisSupport.h b/include/llvm/PassAnalysisSupport.h index d2aec0bbc92..b09ba45e346 100644 --- a/include/llvm/PassAnalysisSupport.h +++ b/include/llvm/PassAnalysisSupport.h @@ -2,8 +2,8 @@ // // The LLVM Compiler Infrastructure // -// This file was developed by the LLVM research group and is distributed under -// the University of Illinois Open Source License. See LICENSE.TXT for details. +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. // //===----------------------------------------------------------------------===// // @@ -20,6 +20,7 @@ #define LLVM_PASS_ANALYSIS_SUPPORT_H #include +#include "llvm/ADT/SmallVector.h" namespace llvm { @@ -34,9 +35,14 @@ namespace llvm { // Pass infrastructure through the getAnalysisUsage virtual function. // class AnalysisUsage { +public: + typedef SmallVector VectorType; + +private: // Sets of analyses required and preserved by a pass - std::vector Required, RequiredTransitive, Preserved; + VectorType Required, RequiredTransitive, Preserved; bool PreservesAll; + public: AnalysisUsage() : PreservesAll(false) {} @@ -44,24 +50,26 @@ public: // for a pass. // AnalysisUsage &addRequiredID(AnalysisID ID) { + assert(ID && "Pass class not registered!"); Required.push_back(ID); return *this; } template AnalysisUsage &addRequired() { - assert(Pass::getClassPassInfo() && "Pass class not registered!"); - Required.push_back(Pass::getClassPassInfo()); - return *this; + return addRequiredID(Pass::getClassPassInfo()); } - template - AnalysisUsage &addRequiredTransitive() { - AnalysisID ID = Pass::getClassPassInfo(); + AnalysisUsage &addRequiredTransitiveID(AnalysisID ID) { assert(ID && "Pass class not registered!"); Required.push_back(ID); RequiredTransitive.push_back(ID); return *this; } + template + AnalysisUsage &addRequiredTransitive() { + AnalysisID ID = Pass::getClassPassInfo(); + return addRequiredTransitiveID(ID); + } // addPreserved - Add the specified ID to the set of analyses preserved by // this pass @@ -93,11 +101,11 @@ public: /// void setPreservesCFG(); - const std::vector &getRequiredSet() const { return Required; } - const std::vector &getRequiredTransitiveSet() const { + const VectorType &getRequiredSet() const { return Required; } + const VectorType &getRequiredTransitiveSet() const { return RequiredTransitive; } - const std::vector &getPreservedSet() const { return Preserved; } + const VectorType &getPreservedSet() const { return Preserved; } }; //===----------------------------------------------------------------------===// @@ -106,12 +114,12 @@ public: // the pass. // class PMDataManager; -class AnalysisResolver_New { +class AnalysisResolver { private: - AnalysisResolver_New(); // DO NOT IMPLEMENT + AnalysisResolver(); // DO NOT IMPLEMENT public: - AnalysisResolver_New(PMDataManager &P) : PM(P) { } + explicit AnalysisResolver(PMDataManager &P) : PM(P) { } inline PMDataManager &getPMDataManager() { return PM; } @@ -127,18 +135,25 @@ public: return ResultPass; } + // Find pass that is implementing PI. Initialize pass for Function F. + Pass *findImplPass(Pass *P, const PassInfo *PI, Function &F); + void addAnalysisImplsPair(const PassInfo *PI, Pass *P) { std::pair pir = std::make_pair(PI,P); AnalysisImpls.push_back(pir); } - // getAnalysisToUpdate - Return an analysis result or null if it doesn't exist - Pass *getAnalysisToUpdate(AnalysisID ID, bool Direction) const; + /// clearAnalysisImpls - Clear cache that is used to connect a pass to the + /// the analysis (PassInfo). + void clearAnalysisImpls() { + AnalysisImpls.clear(); + } + + // getAnalysisIfAvailable - Return analysis result or null if it doesn't exist + Pass *getAnalysisIfAvailable(AnalysisID ID, bool Direction) const; // AnalysisImpls - This keeps track of which passes implements the interfaces // that are required by the current pass (to implement getAnalysis()). - // NOTE : Remove AnalysisImpls from class Pass, when AnalysisResolver_New - // replaces AnalysisResolver std::vector > AnalysisImpls; private: @@ -146,53 +161,22 @@ private: PMDataManager ± }; -//===----------------------------------------------------------------------===// -// AnalysisResolver - Simple interface implemented by PassManager objects that -// is used to pull analysis information out of them. -// -struct AnalysisResolver { - virtual ~AnalysisResolver(); - virtual Pass *getAnalysisOrNullUp(AnalysisID ID) const = 0; - virtual Pass *getAnalysisOrNullDown(AnalysisID ID) const = 0; - virtual void addPass(ImmutablePass *IP, AnalysisUsage &AU) = 0; - Pass *getAnalysis(AnalysisID ID) const { - Pass *Result = getAnalysisOrNullUp(ID); - assert(Result && "Pass has an incorrect analysis uses set!"); - return Result; - } - - // getAnalysisToUpdate - Return an analysis result or null if it doesn't exist - Pass *getAnalysisToUpdate(AnalysisID ID) const { - return getAnalysisOrNullUp(ID); - } - - // Methods for introspecting into pass manager objects... - virtual unsigned getDepth() const = 0; - virtual unsigned getNumContainedPasses() const = 0; - virtual const Pass *getContainedPass(unsigned N) const = 0; - - virtual void markPassUsed(AnalysisID P, Pass *User) = 0; - - void startPass(Pass *P) {} - void endPass(Pass *P) {} -protected: - void setAnalysisResolver(Pass *P, AnalysisResolver *AR); -}; - -/// getAnalysisToUpdate() - This function is used by subclasses -/// to get to the analysis information that might be around that needs to be -/// updated. This is different than getAnalysis in that it can fail (ie the -/// analysis results haven't been computed), so should only be used if you -/// provide the capability to update an analysis that exists. This method is -/// often used by transformation APIs to update analysis results for a pass -/// automatically as the transform is performed. +/// getAnalysisIfAvailable() - Subclasses use this function to +/// get analysis information that might be around, for example to update it. +/// This is different than getAnalysis in that it can fail (if the analysis +/// results haven't been computed), so should only be used if you can handle +/// the case when the analysis is not available. This method is often used by +/// transformation APIs to update analysis results for a pass automatically as +/// the transform is performed. /// template -AnalysisType *Pass::getAnalysisToUpdate() const { +AnalysisType *Pass::getAnalysisIfAvailable() const { assert(Resolver && "Pass not resident in a PassManager object!"); + const PassInfo *PI = getClassPassInfo(); if (PI == 0) return 0; - return dynamic_cast(Resolver->getAnalysisToUpdate(PI)); + return dynamic_cast + (Resolver->getAnalysisIfAvailable(PI, true)); } /// getAnalysis() - This function is used by subclasses to get @@ -201,29 +185,53 @@ AnalysisType *Pass::getAnalysisToUpdate() const { /// template AnalysisType &Pass::getAnalysis() const { - assert(Resolver && "Pass has not been inserted into a PassManager object!"); - const PassInfo *PI = getClassPassInfo(); - return getAnalysisID(PI); + assert(Resolver &&"Pass has not been inserted into a PassManager object!"); + + return getAnalysisID(getClassPassInfo()); } template AnalysisType &Pass::getAnalysisID(const PassInfo *PI) const { - assert(Resolver && "Pass has not been inserted into a PassManager object!"); assert(PI && "getAnalysis for unregistered pass!"); - + assert(Resolver&&"Pass has not been inserted into a PassManager object!"); // PI *must* appear in AnalysisImpls. Because the number of passes used // should be a small number, we just do a linear search over a (dense) // vector. - Pass *ResultPass = 0; - for (unsigned i = 0; ; ++i) { - assert(i != AnalysisImpls.size() && - "getAnalysis*() called on an analysis that was not " - "'required' by pass!"); - if (AnalysisImpls[i].first == PI) { - ResultPass = AnalysisImpls[i].second; - break; - } - } + Pass *ResultPass = Resolver->findImplPass(PI); + assert (ResultPass && + "getAnalysis*() called on an analysis that was not " + "'required' by pass!"); + + // Because the AnalysisType may not be a subclass of pass (for + // AnalysisGroups), we must use dynamic_cast here to potentially adjust the + // return pointer (because the class may multiply inherit, once from pass, + // once from AnalysisType). + // + AnalysisType *Result = dynamic_cast(ResultPass); + assert(Result && "Pass does not implement interface required!"); + return *Result; +} + +/// getAnalysis() - This function is used by subclasses to get +/// to the analysis information that they claim to use by overriding the +/// getAnalysisUsage function. +/// +template +AnalysisType &Pass::getAnalysis(Function &F) { + assert(Resolver &&"Pass has not been inserted into a PassManager object!"); + + return getAnalysisID(getClassPassInfo(), F); +} + +template +AnalysisType &Pass::getAnalysisID(const PassInfo *PI, Function &F) { + assert(PI && "getAnalysis for unregistered pass!"); + assert(Resolver && "Pass has not been inserted into a PassManager object!"); + // PI *must* appear in AnalysisImpls. Because the number of passes used + // should be a small number, we just do a linear search over a (dense) + // vector. + Pass *ResultPass = Resolver->findImplPass(this, PI, F); + assert (ResultPass && "Unable to find requested analysis info"); // Because the AnalysisType may not be a subclass of pass (for // AnalysisGroups), we must use dynamic_cast here to potentially adjust the