1894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman//===- llvm/PassAnalysisSupport.h - Analysis Pass Support code --*- C++ -*-===// 2894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman// 3894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman// The LLVM Compiler Infrastructure 4894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman// 5894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman// This file is distributed under the University of Illinois Open Source 6894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman// License. See LICENSE.TXT for details. 7894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman// 8894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman//===----------------------------------------------------------------------===// 9894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman// 10894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman// This file defines stuff that is used to define and "use" Analysis Passes. 11894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman// This file is automatically #included by Pass.h, so: 12894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman// 13894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman// NO .CPP FILES SHOULD INCLUDE THIS FILE DIRECTLY 14894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman// 15894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman// Instead, #include Pass.h 16894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman// 17894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman//===----------------------------------------------------------------------===// 18894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 19894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman#ifndef LLVM_PASS_ANALYSIS_SUPPORT_H 20894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman#define LLVM_PASS_ANALYSIS_SUPPORT_H 21894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 22894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman#include "llvm/ADT/SmallVector.h" 23894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman#include "llvm/ADT/StringRef.h" 24894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman#include <vector> 25894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 26894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Baumannamespace llvm { 27894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 28894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman//===----------------------------------------------------------------------===// 29894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman// AnalysisUsage - Represent the analysis usage information of a pass. This 30894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman// tracks analyses that the pass REQUIRES (must be available when the pass 31894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman// runs), REQUIRES TRANSITIVE (must be available throughout the lifetime of the 32894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman// pass), and analyses that the pass PRESERVES (the pass does not invalidate the 33894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman// results of these analyses). This information is provided by a pass to the 34894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman// Pass infrastructure through the getAnalysisUsage virtual function. 35894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman// 36894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Baumanclass AnalysisUsage { 37894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Baumanpublic: 38894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman typedef SmallVector<AnalysisID, 32> VectorType; 39894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 40894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Baumanprivate: 41894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Sets of analyses required and preserved by a pass 42894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman VectorType Required, RequiredTransitive, Preserved; 43894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman bool PreservesAll; 44894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 45894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Baumanpublic: 46894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman AnalysisUsage() : PreservesAll(false) {} 47894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 48894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // addRequired - Add the specified ID to the required set of the usage info 49894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // for a pass. 50894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // 51894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman AnalysisUsage &addRequiredID(const void *ID); 52894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman AnalysisUsage &addRequiredID(char &ID); 53894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman template<class PassClass> 54894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman AnalysisUsage &addRequired() { 55894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return addRequiredID(PassClass::ID); 56894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 57894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 58894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman AnalysisUsage &addRequiredTransitiveID(char &ID); 59894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman template<class PassClass> 60894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman AnalysisUsage &addRequiredTransitive() { 61894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return addRequiredTransitiveID(PassClass::ID); 62894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 63894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 64894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // addPreserved - Add the specified ID to the set of analyses preserved by 65894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // this pass 66894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // 67894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman AnalysisUsage &addPreservedID(const void *ID) { 68894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Preserved.push_back(ID); 69894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return *this; 70894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 71894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman AnalysisUsage &addPreservedID(char &ID) { 72894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Preserved.push_back(&ID); 73894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return *this; 74894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 75894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 76894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // addPreserved - Add the specified Pass class to the set of analyses 77894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // preserved by this pass. 78894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // 79894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman template<class PassClass> 80894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman AnalysisUsage &addPreserved() { 81894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Preserved.push_back(&PassClass::ID); 82894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return *this; 83894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 84894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 85894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // addPreserved - Add the Pass with the specified argument string to the set 86894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // of analyses preserved by this pass. If no such Pass exists, do nothing. 87894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // This can be useful when a pass is trivially preserved, but may not be 88894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // linked in. Be careful about spelling! 89894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // 90894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman AnalysisUsage &addPreserved(StringRef Arg); 91894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 92894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // setPreservesAll - Set by analyses that do not transform their input at all 93894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman void setPreservesAll() { PreservesAll = true; } 94894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman bool getPreservesAll() const { return PreservesAll; } 95894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 96894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman /// setPreservesCFG - This function should be called by the pass, iff they do 97894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman /// not: 98894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman /// 99894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman /// 1. Add or remove basic blocks from the function 100894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman /// 2. Modify terminator instructions in any way. 101894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman /// 102894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman /// This function annotates the AnalysisUsage info object to say that analyses 103894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman /// that only depend on the CFG are preserved by this pass. 104894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman /// 105894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman void setPreservesCFG(); 106894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 107894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman const VectorType &getRequiredSet() const { return Required; } 108894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman const VectorType &getRequiredTransitiveSet() const { 109894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return RequiredTransitive; 110894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 111894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman const VectorType &getPreservedSet() const { return Preserved; } 112894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman}; 113894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 114894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman//===----------------------------------------------------------------------===// 115894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman// AnalysisResolver - Simple interface used by Pass objects to pull all 116894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman// analysis information out of pass manager that is responsible to manage 117894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman// the pass. 118894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman// 119894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Baumanclass PMDataManager; 120894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Baumanclass AnalysisResolver { 121894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Baumanprivate: 122894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman AnalysisResolver(); // DO NOT IMPLEMENT 123894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 124894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Baumanpublic: 125894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman explicit AnalysisResolver(PMDataManager &P) : PM(P) { } 126894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 127894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman inline PMDataManager &getPMDataManager() { return PM; } 128894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 129894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Find pass that is implementing PI. 130894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Pass *findImplPass(AnalysisID PI) { 131894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Pass *ResultPass = 0; 132894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman for (unsigned i = 0; i < AnalysisImpls.size() ; ++i) { 133894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (AnalysisImpls[i].first == PI) { 134894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman ResultPass = AnalysisImpls[i].second; 135894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman break; 136894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 137894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 138894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return ResultPass; 139894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 140894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 141894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Find pass that is implementing PI. Initialize pass for Function F. 142894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Pass *findImplPass(Pass *P, AnalysisID PI, Function &F); 143894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 144894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman void addAnalysisImplsPair(AnalysisID PI, Pass *P) { 14519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (findImplPass(PI) == P) 14619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return; 147894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman std::pair<AnalysisID, Pass*> pir = std::make_pair(PI,P); 148894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman AnalysisImpls.push_back(pir); 149894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 150894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 151894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman /// clearAnalysisImpls - Clear cache that is used to connect a pass to the 152894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman /// the analysis (PassInfo). 153894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman void clearAnalysisImpls() { 154894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman AnalysisImpls.clear(); 155894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 156894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 157894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // getAnalysisIfAvailable - Return analysis result or null if it doesn't exist 158894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Pass *getAnalysisIfAvailable(AnalysisID ID, bool Direction) const; 159894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 160894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Baumanprivate: 161894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // AnalysisImpls - This keeps track of which passes implements the interfaces 162894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // that are required by the current pass (to implement getAnalysis()). 163894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman std::vector<std::pair<AnalysisID, Pass*> > AnalysisImpls; 164894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 165894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // PassManager that is used to resolve analysis info 166894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman PMDataManager &PM; 167894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman}; 168894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 169894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// getAnalysisIfAvailable<AnalysisType>() - Subclasses use this function to 170894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// get analysis information that might be around, for example to update it. 171894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// This is different than getAnalysis in that it can fail (if the analysis 172894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// results haven't been computed), so should only be used if you can handle 173894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// the case when the analysis is not available. This method is often used by 174894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// transformation APIs to update analysis results for a pass automatically as 175894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// the transform is performed. 176894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// 177894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Baumantemplate<typename AnalysisType> 178894018228b0e0bdbd7aa7e8f47d4a9458789ca82John BaumanAnalysisType *Pass::getAnalysisIfAvailable() const { 179894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman assert(Resolver && "Pass not resident in a PassManager object!"); 180894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 181894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman const void *PI = &AnalysisType::ID; 182894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 183894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Pass *ResultPass = Resolver->getAnalysisIfAvailable(PI, true); 184894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (ResultPass == 0) return 0; 185894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 186894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Because the AnalysisType may not be a subclass of pass (for 187894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // AnalysisGroups), we use getAdjustedAnalysisPointer here to potentially 188894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // adjust the return pointer (because the class may multiply inherit, once 189894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // from pass, once from AnalysisType). 190894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return (AnalysisType*)ResultPass->getAdjustedAnalysisPointer(PI); 191894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman} 192894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 193894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// getAnalysis<AnalysisType>() - This function is used by subclasses to get 194894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// to the analysis information that they claim to use by overriding the 195894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// getAnalysisUsage function. 196894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// 197894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Baumantemplate<typename AnalysisType> 198894018228b0e0bdbd7aa7e8f47d4a9458789ca82John BaumanAnalysisType &Pass::getAnalysis() const { 199894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman assert(Resolver && "Pass has not been inserted into a PassManager object!"); 200894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return getAnalysisID<AnalysisType>(&AnalysisType::ID); 201894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman} 202894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 203894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Baumantemplate<typename AnalysisType> 204894018228b0e0bdbd7aa7e8f47d4a9458789ca82John BaumanAnalysisType &Pass::getAnalysisID(AnalysisID PI) const { 205894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman assert(PI && "getAnalysis for unregistered pass!"); 206894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman assert(Resolver&&"Pass has not been inserted into a PassManager object!"); 207894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // PI *must* appear in AnalysisImpls. Because the number of passes used 208894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // should be a small number, we just do a linear search over a (dense) 209894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // vector. 210894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Pass *ResultPass = Resolver->findImplPass(PI); 211894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman assert (ResultPass && 212894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman "getAnalysis*() called on an analysis that was not " 213894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman "'required' by pass!"); 214894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 215894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Because the AnalysisType may not be a subclass of pass (for 216894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // AnalysisGroups), we use getAdjustedAnalysisPointer here to potentially 217894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // adjust the return pointer (because the class may multiply inherit, once 218894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // from pass, once from AnalysisType). 219894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return *(AnalysisType*)ResultPass->getAdjustedAnalysisPointer(PI); 220894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman} 221894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 222894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// getAnalysis<AnalysisType>() - This function is used by subclasses to get 223894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// to the analysis information that they claim to use by overriding the 224894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// getAnalysisUsage function. 225894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// 226894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Baumantemplate<typename AnalysisType> 227894018228b0e0bdbd7aa7e8f47d4a9458789ca82John BaumanAnalysisType &Pass::getAnalysis(Function &F) { 228894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman assert(Resolver &&"Pass has not been inserted into a PassManager object!"); 229894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 230894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return getAnalysisID<AnalysisType>(&AnalysisType::ID, F); 231894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman} 232894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 233894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Baumantemplate<typename AnalysisType> 234894018228b0e0bdbd7aa7e8f47d4a9458789ca82John BaumanAnalysisType &Pass::getAnalysisID(AnalysisID PI, Function &F) { 235894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman assert(PI && "getAnalysis for unregistered pass!"); 236894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman assert(Resolver && "Pass has not been inserted into a PassManager object!"); 237894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // PI *must* appear in AnalysisImpls. Because the number of passes used 238894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // should be a small number, we just do a linear search over a (dense) 239894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // vector. 240894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Pass *ResultPass = Resolver->findImplPass(this, PI, F); 241894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman assert(ResultPass && "Unable to find requested analysis info"); 242894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 243894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Because the AnalysisType may not be a subclass of pass (for 244894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // AnalysisGroups), we use getAdjustedAnalysisPointer here to potentially 245894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // adjust the return pointer (because the class may multiply inherit, once 246894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // from pass, once from AnalysisType). 247894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return *(AnalysisType*)ResultPass->getAdjustedAnalysisPointer(PI); 248894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman} 249894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 250894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman} // End llvm namespace 251894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 252894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman#endif 253