X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=include%2Fllvm%2FPassAnalysisSupport.h;h=b09ba45e346d3b9bdfdc44925f273ce4414fa3cc;hb=b6d667403fed489ef92174b3f19d4b87db5c39f7;hp=75434a25ef2bbae96cdaf95222e0ad119fbbffc1;hpb=6b1df0e863963929634d769f39cbce68f030f051;p=oota-llvm.git diff --git a/include/llvm/PassAnalysisSupport.h b/include/llvm/PassAnalysisSupport.h index 75434a25ef2..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; } }; //===----------------------------------------------------------------------===// @@ -135,13 +143,17 @@ public: 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 - // replaces AnalysisResolver std::vector > AnalysisImpls; private: @@ -149,22 +161,22 @@ private: PMDataManager ± }; -/// 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, true)); + (Resolver->getAnalysisIfAvailable(PI, true)); } /// getAnalysis() - This function is used by subclasses to get @@ -214,23 +226,21 @@ AnalysisType &Pass::getAnalysis(Function &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 && - "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; + 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 + // 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; } } // End llvm namespace