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annotate include/llvm/PassAnalysisSupport.h @ 92:8a1cd0ffee6e

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Create prototype declaration automatically if prototype was not found when parsing continuation arguments.
author Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
date Fri, 17 Apr 2015 13:54:34 +0900
parents 60c9769439b8
children afa8332a0e37
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1 //===- llvm/PassAnalysisSupport.h - Analysis Pass Support code --*- C++ -*-===//
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2 //
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3 // The LLVM Compiler Infrastructure
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4 //
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5 // This file is distributed under the University of Illinois Open Source
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6 // License. See LICENSE.TXT for details.
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7 //
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8 //===----------------------------------------------------------------------===//
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9 //
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10 // This file defines stuff that is used to define and "use" Analysis Passes.
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11 // This file is automatically #included by Pass.h, so:
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12 //
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13 // NO .CPP FILES SHOULD INCLUDE THIS FILE DIRECTLY
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14 //
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15 // Instead, #include Pass.h
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16 //
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17 //===----------------------------------------------------------------------===//
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18
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19 #ifndef LLVM_PASSANALYSISSUPPORT_H
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20 #define LLVM_PASSANALYSISSUPPORT_H
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21
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22 #include "llvm/ADT/SmallVector.h"
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23 #include "llvm/ADT/StringRef.h"
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24 #include "llvm/Pass.h"
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25 #include <vector>
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26
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27 namespace llvm {
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28
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29 //===----------------------------------------------------------------------===//
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30 // AnalysisUsage - Represent the analysis usage information of a pass. This
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31 // tracks analyses that the pass REQUIRES (must be available when the pass
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32 // runs), REQUIRES TRANSITIVE (must be available throughout the lifetime of the
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33 // pass), and analyses that the pass PRESERVES (the pass does not invalidate the
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34 // results of these analyses). This information is provided by a pass to the
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35 // Pass infrastructure through the getAnalysisUsage virtual function.
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36 //
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37 class AnalysisUsage {
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38 public:
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39 typedef SmallVector<AnalysisID, 32> VectorType;
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40
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41 private:
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42 // Sets of analyses required and preserved by a pass
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43 VectorType Required, RequiredTransitive, Preserved;
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44 bool PreservesAll;
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45
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46 public:
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47 AnalysisUsage() : PreservesAll(false) {}
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48
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49 // addRequired - Add the specified ID to the required set of the usage info
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50 // for a pass.
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51 //
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52 AnalysisUsage &addRequiredID(const void *ID);
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53 AnalysisUsage &addRequiredID(char &ID);
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54 template<class PassClass>
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55 AnalysisUsage &addRequired() {
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56 return addRequiredID(PassClass::ID);
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57 }
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58
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59 AnalysisUsage &addRequiredTransitiveID(char &ID);
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60 template<class PassClass>
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61 AnalysisUsage &addRequiredTransitive() {
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62 return addRequiredTransitiveID(PassClass::ID);
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63 }
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64
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65 // addPreserved - Add the specified ID to the set of analyses preserved by
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66 // this pass
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67 //
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68 AnalysisUsage &addPreservedID(const void *ID) {
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69 Preserved.push_back(ID);
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70 return *this;
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71 }
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72 AnalysisUsage &addPreservedID(char &ID) {
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73 Preserved.push_back(&ID);
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74 return *this;
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75 }
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76
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77 // addPreserved - Add the specified Pass class to the set of analyses
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78 // preserved by this pass.
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79 //
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80 template<class PassClass>
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81 AnalysisUsage &addPreserved() {
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82 Preserved.push_back(&PassClass::ID);
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83 return *this;
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84 }
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85
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86 // addPreserved - Add the Pass with the specified argument string to the set
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87 // of analyses preserved by this pass. If no such Pass exists, do nothing.
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88 // This can be useful when a pass is trivially preserved, but may not be
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89 // linked in. Be careful about spelling!
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90 //
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91 AnalysisUsage &addPreserved(StringRef Arg);
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92
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93 // setPreservesAll - Set by analyses that do not transform their input at all
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94 void setPreservesAll() { PreservesAll = true; }
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95 bool getPreservesAll() const { return PreservesAll; }
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96
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97 /// setPreservesCFG - This function should be called by the pass, iff they do
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98 /// not:
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99 ///
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100 /// 1. Add or remove basic blocks from the function
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101 /// 2. Modify terminator instructions in any way.
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102 ///
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103 /// This function annotates the AnalysisUsage info object to say that analyses
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104 /// that only depend on the CFG are preserved by this pass.
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105 ///
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106 void setPreservesCFG();
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107
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108 const VectorType &getRequiredSet() const { return Required; }
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109 const VectorType &getRequiredTransitiveSet() const {
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110 return RequiredTransitive;
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111 }
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112 const VectorType &getPreservedSet() const { return Preserved; }
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113 };
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114
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115 //===----------------------------------------------------------------------===//
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116 // AnalysisResolver - Simple interface used by Pass objects to pull all
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117 // analysis information out of pass manager that is responsible to manage
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118 // the pass.
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119 //
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120 class PMDataManager;
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121 class AnalysisResolver {
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122 private:
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123 AnalysisResolver() = delete;
0
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124
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125 public:
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126 explicit AnalysisResolver(PMDataManager &P) : PM(P) { }
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127
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128 inline PMDataManager &getPMDataManager() { return PM; }
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129
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130 // Find pass that is implementing PI.
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131 Pass *findImplPass(AnalysisID PI) {
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132 Pass *ResultPass = nullptr;
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133 for (unsigned i = 0; i < AnalysisImpls.size() ; ++i) {
95c75e76d11b LLVM 3.4
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parents:
diff changeset
134 if (AnalysisImpls[i].first == PI) {
95c75e76d11b LLVM 3.4
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parents:
diff changeset
135 ResultPass = AnalysisImpls[i].second;
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
136 break;
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
137 }
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
138 }
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
139 return ResultPass;
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
140 }
95c75e76d11b LLVM 3.4
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parents:
diff changeset
141
95c75e76d11b LLVM 3.4
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parents:
diff changeset
142 // Find pass that is implementing PI. Initialize pass for Function F.
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
143 Pass *findImplPass(Pass *P, AnalysisID PI, Function &F);
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parents:
diff changeset
144
95c75e76d11b LLVM 3.4
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parents:
diff changeset
145 void addAnalysisImplsPair(AnalysisID PI, Pass *P) {
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
146 if (findImplPass(PI) == P)
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
147 return;
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
148 std::pair<AnalysisID, Pass*> pir = std::make_pair(PI,P);
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
149 AnalysisImpls.push_back(pir);
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
150 }
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
151
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parents:
diff changeset
152 /// clearAnalysisImpls - Clear cache that is used to connect a pass to the
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parents:
diff changeset
153 /// the analysis (PassInfo).
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
154 void clearAnalysisImpls() {
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
155 AnalysisImpls.clear();
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
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156 }
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parents:
diff changeset
157
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parents:
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158 // getAnalysisIfAvailable - Return analysis result or null if it doesn't exist
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
159 Pass *getAnalysisIfAvailable(AnalysisID ID, bool Direction) const;
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parents:
diff changeset
160
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parents:
diff changeset
161 private:
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parents:
diff changeset
162 // AnalysisImpls - This keeps track of which passes implements the interfaces
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
163 // that are required by the current pass (to implement getAnalysis()).
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parents:
diff changeset
164 std::vector<std::pair<AnalysisID, Pass*> > AnalysisImpls;
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parents:
diff changeset
165
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parents:
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166 // PassManager that is used to resolve analysis info
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
167 PMDataManager &PM;
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
168 };
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
169
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parents:
diff changeset
170 /// getAnalysisIfAvailable<AnalysisType>() - Subclasses use this function to
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
171 /// get analysis information that might be around, for example to update it.
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
172 /// This is different than getAnalysis in that it can fail (if the analysis
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
173 /// results haven't been computed), so should only be used if you can handle
95c75e76d11b LLVM 3.4
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parents:
diff changeset
174 /// the case when the analysis is not available. This method is often used by
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
175 /// transformation APIs to update analysis results for a pass automatically as
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
176 /// the transform is performed.
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
177 ///
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
178 template<typename AnalysisType>
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
179 AnalysisType *Pass::getAnalysisIfAvailable() const {
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
180 assert(Resolver && "Pass not resident in a PassManager object!");
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parents:
diff changeset
181
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parents:
diff changeset
182 const void *PI = &AnalysisType::ID;
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parents:
diff changeset
183
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parents:
diff changeset
184 Pass *ResultPass = Resolver->getAnalysisIfAvailable(PI, true);
77
54457678186b LLVM 3.6
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents: 0
diff changeset
185 if (!ResultPass) return nullptr;
0
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
186
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parents:
diff changeset
187 // Because the AnalysisType may not be a subclass of pass (for
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
188 // AnalysisGroups), we use getAdjustedAnalysisPointer here to potentially
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
189 // adjust the return pointer (because the class may multiply inherit, once
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
190 // from pass, once from AnalysisType).
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
191 return (AnalysisType*)ResultPass->getAdjustedAnalysisPointer(PI);
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
192 }
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parents:
diff changeset
193
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diff changeset
194 /// getAnalysis<AnalysisType>() - This function is used by subclasses to get
95c75e76d11b LLVM 3.4
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parents:
diff changeset
195 /// to the analysis information that they claim to use by overriding the
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
196 /// getAnalysisUsage function.
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
197 ///
95c75e76d11b LLVM 3.4
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parents:
diff changeset
198 template<typename AnalysisType>
95c75e76d11b LLVM 3.4
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parents:
diff changeset
199 AnalysisType &Pass::getAnalysis() const {
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
200 assert(Resolver && "Pass has not been inserted into a PassManager object!");
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
201 return getAnalysisID<AnalysisType>(&AnalysisType::ID);
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
202 }
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
203
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
204 template<typename AnalysisType>
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
205 AnalysisType &Pass::getAnalysisID(AnalysisID PI) const {
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
206 assert(PI && "getAnalysis for unregistered pass!");
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
207 assert(Resolver&&"Pass has not been inserted into a PassManager object!");
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
208 // PI *must* appear in AnalysisImpls. Because the number of passes used
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
209 // should be a small number, we just do a linear search over a (dense)
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
210 // vector.
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
211 Pass *ResultPass = Resolver->findImplPass(PI);
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
212 assert (ResultPass &&
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
213 "getAnalysis*() called on an analysis that was not "
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
214 "'required' by pass!");
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
215
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
216 // Because the AnalysisType may not be a subclass of pass (for
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
217 // AnalysisGroups), we use getAdjustedAnalysisPointer here to potentially
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
218 // adjust the return pointer (because the class may multiply inherit, once
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
219 // from pass, once from AnalysisType).
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
220 return *(AnalysisType*)ResultPass->getAdjustedAnalysisPointer(PI);
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
221 }
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
222
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
223 /// getAnalysis<AnalysisType>() - This function is used by subclasses to get
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
224 /// to the analysis information that they claim to use by overriding the
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
225 /// getAnalysisUsage function.
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
226 ///
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
227 template<typename AnalysisType>
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
228 AnalysisType &Pass::getAnalysis(Function &F) {
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
229 assert(Resolver &&"Pass has not been inserted into a PassManager object!");
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
230
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
231 return getAnalysisID<AnalysisType>(&AnalysisType::ID, F);
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
232 }
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
233
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
234 template<typename AnalysisType>
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
235 AnalysisType &Pass::getAnalysisID(AnalysisID PI, Function &F) {
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
236 assert(PI && "getAnalysis for unregistered pass!");
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
237 assert(Resolver && "Pass has not been inserted into a PassManager object!");
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
238 // PI *must* appear in AnalysisImpls. Because the number of passes used
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
239 // should be a small number, we just do a linear search over a (dense)
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
240 // vector.
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
241 Pass *ResultPass = Resolver->findImplPass(this, PI, F);
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
242 assert(ResultPass && "Unable to find requested analysis info");
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
243
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
244 // Because the AnalysisType may not be a subclass of pass (for
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
245 // AnalysisGroups), we use getAdjustedAnalysisPointer here to potentially
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
246 // adjust the return pointer (because the class may multiply inherit, once
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
247 // from pass, once from AnalysisType).
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
248 return *(AnalysisType*)ResultPass->getAdjustedAnalysisPointer(PI);
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
249 }
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
250
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
251 } // End llvm namespace
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
252
95c75e76d11b LLVM 3.4
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parents:
diff changeset
253 #endif