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1 //===- Module.cpp - Implement the Module class ----------------------------===//
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2 //
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3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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4 // See https://llvm.org/LICENSE.txt for license information.
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5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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6 //
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7 //===----------------------------------------------------------------------===//
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8 //
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9 // This file implements the Module class for the IR library.
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10 //
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11 //===----------------------------------------------------------------------===//
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12
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13 #include "llvm/IR/Module.h"
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14 #include "SymbolTableListTraitsImpl.h"
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15 #include "llvm/ADT/Optional.h"
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16 #include "llvm/ADT/SmallPtrSet.h"
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17 #include "llvm/ADT/SmallString.h"
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18 #include "llvm/ADT/SmallVector.h"
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19 #include "llvm/ADT/StringMap.h"
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20 #include "llvm/ADT/StringRef.h"
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21 #include "llvm/ADT/Twine.h"
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22 #include "llvm/IR/Attributes.h"
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23 #include "llvm/IR/Comdat.h"
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24 #include "llvm/IR/Constants.h"
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25 #include "llvm/IR/DataLayout.h"
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26 #include "llvm/IR/DebugInfoMetadata.h"
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27 #include "llvm/IR/DerivedTypes.h"
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28 #include "llvm/IR/Function.h"
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29 #include "llvm/IR/GVMaterializer.h"
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30 #include "llvm/IR/GlobalAlias.h"
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31 #include "llvm/IR/GlobalIFunc.h"
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32 #include "llvm/IR/GlobalValue.h"
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33 #include "llvm/IR/GlobalVariable.h"
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34 #include "llvm/IR/LLVMContext.h"
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35 #include "llvm/IR/Metadata.h"
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221
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36 #include "llvm/IR/ModuleSummaryIndex.h"
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150
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37 #include "llvm/IR/SymbolTableListTraits.h"
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38 #include "llvm/IR/Type.h"
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39 #include "llvm/IR/TypeFinder.h"
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40 #include "llvm/IR/Value.h"
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41 #include "llvm/IR/ValueSymbolTable.h"
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42 #include "llvm/Pass.h"
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43 #include "llvm/Support/Casting.h"
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44 #include "llvm/Support/CodeGen.h"
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45 #include "llvm/Support/Error.h"
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46 #include "llvm/Support/MemoryBuffer.h"
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47 #include "llvm/Support/Path.h"
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48 #include "llvm/Support/RandomNumberGenerator.h"
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49 #include "llvm/Support/VersionTuple.h"
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50 #include <algorithm>
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51 #include <cassert>
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52 #include <cstdint>
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53 #include <memory>
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54 #include <utility>
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55 #include <vector>
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56
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57 using namespace llvm;
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58
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59 //===----------------------------------------------------------------------===//
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60 // Methods to implement the globals and functions lists.
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61 //
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62
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63 // Explicit instantiations of SymbolTableListTraits since some of the methods
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64 // are not in the public header file.
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65 template class llvm::SymbolTableListTraits<Function>;
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66 template class llvm::SymbolTableListTraits<GlobalVariable>;
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67 template class llvm::SymbolTableListTraits<GlobalAlias>;
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68 template class llvm::SymbolTableListTraits<GlobalIFunc>;
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69
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70 //===----------------------------------------------------------------------===//
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71 // Primitive Module methods.
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72 //
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73
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74 Module::Module(StringRef MID, LLVMContext &C)
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221
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75 : Context(C), ValSymTab(std::make_unique<ValueSymbolTable>(-1)),
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150
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76 Materializer(), ModuleID(std::string(MID)),
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77 SourceFileName(std::string(MID)), DL("") {
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78 Context.addModule(this);
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79 }
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80
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81 Module::~Module() {
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82 Context.removeModule(this);
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83 dropAllReferences();
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84 GlobalList.clear();
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85 FunctionList.clear();
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86 AliasList.clear();
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87 IFuncList.clear();
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88 }
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89
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90 std::unique_ptr<RandomNumberGenerator>
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91 Module::createRNG(const StringRef Name) const {
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92 SmallString<32> Salt(Name);
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93
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94 // This RNG is guaranteed to produce the same random stream only
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95 // when the Module ID and thus the input filename is the same. This
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96 // might be problematic if the input filename extension changes
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97 // (e.g. from .c to .bc or .ll).
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98 //
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99 // We could store this salt in NamedMetadata, but this would make
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100 // the parameter non-const. This would unfortunately make this
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101 // interface unusable by any Machine passes, since they only have a
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102 // const reference to their IR Module. Alternatively we can always
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103 // store salt metadata from the Module constructor.
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104 Salt += sys::path::filename(getModuleIdentifier());
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105
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106 return std::unique_ptr<RandomNumberGenerator>(
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107 new RandomNumberGenerator(Salt));
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108 }
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109
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110 /// getNamedValue - Return the first global value in the module with
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111 /// the specified name, of arbitrary type. This method returns null
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112 /// if a global with the specified name is not found.
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113 GlobalValue *Module::getNamedValue(StringRef Name) const {
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114 return cast_or_null<GlobalValue>(getValueSymbolTable().lookup(Name));
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115 }
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116
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117 /// getMDKindID - Return a unique non-zero ID for the specified metadata kind.
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118 /// This ID is uniqued across modules in the current LLVMContext.
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119 unsigned Module::getMDKindID(StringRef Name) const {
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120 return Context.getMDKindID(Name);
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121 }
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122
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123 /// getMDKindNames - Populate client supplied SmallVector with the name for
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124 /// custom metadata IDs registered in this LLVMContext. ID #0 is not used,
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125 /// so it is filled in as an empty string.
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126 void Module::getMDKindNames(SmallVectorImpl<StringRef> &Result) const {
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127 return Context.getMDKindNames(Result);
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128 }
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129
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130 void Module::getOperandBundleTags(SmallVectorImpl<StringRef> &Result) const {
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131 return Context.getOperandBundleTags(Result);
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132 }
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133
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134 //===----------------------------------------------------------------------===//
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135 // Methods for easy access to the functions in the module.
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136 //
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137
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138 // getOrInsertFunction - Look up the specified function in the module symbol
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139 // table. If it does not exist, add a prototype for the function and return
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140 // it. This is nice because it allows most passes to get away with not handling
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141 // the symbol table directly for this common task.
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142 //
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143 FunctionCallee Module::getOrInsertFunction(StringRef Name, FunctionType *Ty,
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144 AttributeList AttributeList) {
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145 // See if we have a definition for the specified function already.
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146 GlobalValue *F = getNamedValue(Name);
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147 if (!F) {
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148 // Nope, add it
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149 Function *New = Function::Create(Ty, GlobalVariable::ExternalLinkage,
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150 DL.getProgramAddressSpace(), Name);
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151 if (!New->isIntrinsic()) // Intrinsics get attrs set on construction
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152 New->setAttributes(AttributeList);
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153 FunctionList.push_back(New);
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154 return {Ty, New}; // Return the new prototype.
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155 }
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156
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157 // If the function exists but has the wrong type, return a bitcast to the
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158 // right type.
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159 auto *PTy = PointerType::get(Ty, F->getAddressSpace());
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160 if (F->getType() != PTy)
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161 return {Ty, ConstantExpr::getBitCast(F, PTy)};
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162
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163 // Otherwise, we just found the existing function or a prototype.
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164 return {Ty, F};
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165 }
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166
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167 FunctionCallee Module::getOrInsertFunction(StringRef Name, FunctionType *Ty) {
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168 return getOrInsertFunction(Name, Ty, AttributeList());
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169 }
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170
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171 // getFunction - Look up the specified function in the module symbol table.
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172 // If it does not exist, return null.
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173 //
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174 Function *Module::getFunction(StringRef Name) const {
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175 return dyn_cast_or_null<Function>(getNamedValue(Name));
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176 }
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177
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178 //===----------------------------------------------------------------------===//
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179 // Methods for easy access to the global variables in the module.
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180 //
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181
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182 /// getGlobalVariable - Look up the specified global variable in the module
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183 /// symbol table. If it does not exist, return null. The type argument
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184 /// should be the underlying type of the global, i.e., it should not have
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185 /// the top-level PointerType, which represents the address of the global.
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186 /// If AllowLocal is set to true, this function will return types that
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187 /// have an local. By default, these types are not returned.
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188 ///
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189 GlobalVariable *Module::getGlobalVariable(StringRef Name,
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190 bool AllowLocal) const {
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191 if (GlobalVariable *Result =
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192 dyn_cast_or_null<GlobalVariable>(getNamedValue(Name)))
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193 if (AllowLocal || !Result->hasLocalLinkage())
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194 return Result;
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195 return nullptr;
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196 }
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197
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198 /// getOrInsertGlobal - Look up the specified global in the module symbol table.
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199 /// 1. If it does not exist, add a declaration of the global and return it.
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200 /// 2. Else, the global exists but has the wrong type: return the function
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201 /// with a constantexpr cast to the right type.
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202 /// 3. Finally, if the existing global is the correct declaration, return the
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203 /// existing global.
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204 Constant *Module::getOrInsertGlobal(
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205 StringRef Name, Type *Ty,
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206 function_ref<GlobalVariable *()> CreateGlobalCallback) {
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207 // See if we have a definition for the specified global already.
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208 GlobalVariable *GV = dyn_cast_or_null<GlobalVariable>(getNamedValue(Name));
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209 if (!GV)
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210 GV = CreateGlobalCallback();
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211 assert(GV && "The CreateGlobalCallback is expected to create a global");
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212
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213 // If the variable exists but has the wrong type, return a bitcast to the
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214 // right type.
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215 Type *GVTy = GV->getType();
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216 PointerType *PTy = PointerType::get(Ty, GVTy->getPointerAddressSpace());
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217 if (GVTy != PTy)
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218 return ConstantExpr::getBitCast(GV, PTy);
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219
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220 // Otherwise, we just found the existing function or a prototype.
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221 return GV;
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222 }
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223
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224 // Overload to construct a global variable using its constructor's defaults.
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225 Constant *Module::getOrInsertGlobal(StringRef Name, Type *Ty) {
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226 return getOrInsertGlobal(Name, Ty, [&] {
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227 return new GlobalVariable(*this, Ty, false, GlobalVariable::ExternalLinkage,
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228 nullptr, Name);
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229 });
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230 }
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231
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232 //===----------------------------------------------------------------------===//
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233 // Methods for easy access to the global variables in the module.
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234 //
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235
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236 // getNamedAlias - Look up the specified global in the module symbol table.
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237 // If it does not exist, return null.
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238 //
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239 GlobalAlias *Module::getNamedAlias(StringRef Name) const {
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240 return dyn_cast_or_null<GlobalAlias>(getNamedValue(Name));
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241 }
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242
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243 GlobalIFunc *Module::getNamedIFunc(StringRef Name) const {
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244 return dyn_cast_or_null<GlobalIFunc>(getNamedValue(Name));
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245 }
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246
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247 /// getNamedMetadata - Return the first NamedMDNode in the module with the
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248 /// specified name. This method returns null if a NamedMDNode with the
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249 /// specified name is not found.
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250 NamedMDNode *Module::getNamedMetadata(const Twine &Name) const {
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251 SmallString<256> NameData;
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252 StringRef NameRef = Name.toStringRef(NameData);
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253 return NamedMDSymTab.lookup(NameRef);
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254 }
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255
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256 /// getOrInsertNamedMetadata - Return the first named MDNode in the module
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257 /// with the specified name. This method returns a new NamedMDNode if a
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258 /// NamedMDNode with the specified name is not found.
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259 NamedMDNode *Module::getOrInsertNamedMetadata(StringRef Name) {
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260 NamedMDNode *&NMD = NamedMDSymTab[Name];
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261 if (!NMD) {
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262 NMD = new NamedMDNode(Name);
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263 NMD->setParent(this);
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264 NamedMDList.push_back(NMD);
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265 }
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266 return NMD;
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267 }
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268
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269 /// eraseNamedMetadata - Remove the given NamedMDNode from this module and
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270 /// delete it.
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271 void Module::eraseNamedMetadata(NamedMDNode *NMD) {
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272 NamedMDSymTab.erase(NMD->getName());
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273 NamedMDList.erase(NMD->getIterator());
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274 }
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275
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276 bool Module::isValidModFlagBehavior(Metadata *MD, ModFlagBehavior &MFB) {
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277 if (ConstantInt *Behavior = mdconst::dyn_extract_or_null<ConstantInt>(MD)) {
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278 uint64_t Val = Behavior->getLimitedValue();
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279 if (Val >= ModFlagBehaviorFirstVal && Val <= ModFlagBehaviorLastVal) {
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280 MFB = static_cast<ModFlagBehavior>(Val);
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281 return true;
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282 }
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283 }
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284 return false;
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285 }
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286
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173
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287 bool Module::isValidModuleFlag(const MDNode &ModFlag, ModFlagBehavior &MFB,
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288 MDString *&Key, Metadata *&Val) {
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289 if (ModFlag.getNumOperands() < 3)
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290 return false;
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291 if (!isValidModFlagBehavior(ModFlag.getOperand(0), MFB))
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292 return false;
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293 MDString *K = dyn_cast_or_null<MDString>(ModFlag.getOperand(1));
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294 if (!K)
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295 return false;
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296 Key = K;
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297 Val = ModFlag.getOperand(2);
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298 return true;
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299 }
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300
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150
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301 /// getModuleFlagsMetadata - Returns the module flags in the provided vector.
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302 void Module::
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303 getModuleFlagsMetadata(SmallVectorImpl<ModuleFlagEntry> &Flags) const {
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304 const NamedMDNode *ModFlags = getModuleFlagsMetadata();
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305 if (!ModFlags) return;
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306
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307 for (const MDNode *Flag : ModFlags->operands()) {
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308 ModFlagBehavior MFB;
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173
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309 MDString *Key = nullptr;
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310 Metadata *Val = nullptr;
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311 if (isValidModuleFlag(*Flag, MFB, Key, Val)) {
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150
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312 // Check the operands of the MDNode before accessing the operands.
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313 // The verifier will actually catch these failures.
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314 Flags.push_back(ModuleFlagEntry(MFB, Key, Val));
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315 }
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316 }
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317 }
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318
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319 /// Return the corresponding value if Key appears in module flags, otherwise
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320 /// return null.
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321 Metadata *Module::getModuleFlag(StringRef Key) const {
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322 SmallVector<Module::ModuleFlagEntry, 8> ModuleFlags;
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323 getModuleFlagsMetadata(ModuleFlags);
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324 for (const ModuleFlagEntry &MFE : ModuleFlags) {
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325 if (Key == MFE.Key->getString())
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326 return MFE.Val;
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327 }
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328 return nullptr;
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329 }
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330
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331 /// getModuleFlagsMetadata - Returns the NamedMDNode in the module that
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332 /// represents module-level flags. This method returns null if there are no
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333 /// module-level flags.
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334 NamedMDNode *Module::getModuleFlagsMetadata() const {
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335 return getNamedMetadata("llvm.module.flags");
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336 }
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337
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338 /// getOrInsertModuleFlagsMetadata - Returns the NamedMDNode in the module that
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339 /// represents module-level flags. If module-level flags aren't found, it
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340 /// creates the named metadata that contains them.
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341 NamedMDNode *Module::getOrInsertModuleFlagsMetadata() {
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342 return getOrInsertNamedMetadata("llvm.module.flags");
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343 }
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344
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345 /// addModuleFlag - Add a module-level flag to the module-level flags
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346 /// metadata. It will create the module-level flags named metadata if it doesn't
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347 /// already exist.
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348 void Module::addModuleFlag(ModFlagBehavior Behavior, StringRef Key,
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349 Metadata *Val) {
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350 Type *Int32Ty = Type::getInt32Ty(Context);
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351 Metadata *Ops[3] = {
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352 ConstantAsMetadata::get(ConstantInt::get(Int32Ty, Behavior)),
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353 MDString::get(Context, Key), Val};
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354 getOrInsertModuleFlagsMetadata()->addOperand(MDNode::get(Context, Ops));
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355 }
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356 void Module::addModuleFlag(ModFlagBehavior Behavior, StringRef Key,
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357 Constant *Val) {
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358 addModuleFlag(Behavior, Key, ConstantAsMetadata::get(Val));
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359 }
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360 void Module::addModuleFlag(ModFlagBehavior Behavior, StringRef Key,
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361 uint32_t Val) {
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362 Type *Int32Ty = Type::getInt32Ty(Context);
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363 addModuleFlag(Behavior, Key, ConstantInt::get(Int32Ty, Val));
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364 }
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365 void Module::addModuleFlag(MDNode *Node) {
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366 assert(Node->getNumOperands() == 3 &&
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367 "Invalid number of operands for module flag!");
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368 assert(mdconst::hasa<ConstantInt>(Node->getOperand(0)) &&
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369 isa<MDString>(Node->getOperand(1)) &&
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370 "Invalid operand types for module flag!");
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371 getOrInsertModuleFlagsMetadata()->addOperand(Node);
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372 }
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373
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173
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374 void Module::setModuleFlag(ModFlagBehavior Behavior, StringRef Key,
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375 Metadata *Val) {
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376 NamedMDNode *ModFlags = getOrInsertModuleFlagsMetadata();
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377 // Replace the flag if it already exists.
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378 for (unsigned I = 0, E = ModFlags->getNumOperands(); I != E; ++I) {
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379 MDNode *Flag = ModFlags->getOperand(I);
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380 ModFlagBehavior MFB;
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381 MDString *K = nullptr;
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382 Metadata *V = nullptr;
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383 if (isValidModuleFlag(*Flag, MFB, K, V) && K->getString() == Key) {
|
|
|
384 Flag->replaceOperandWith(2, Val);
|
|
|
385 return;
|
|
|
386 }
|
|
|
387 }
|
|
|
388 addModuleFlag(Behavior, Key, Val);
|
|
|
389 }
|
|
|
390
|
|
150
|
391 void Module::setDataLayout(StringRef Desc) {
|
|
|
392 DL.reset(Desc);
|
|
|
393 }
|
|
|
394
|
|
|
395 void Module::setDataLayout(const DataLayout &Other) { DL = Other; }
|
|
|
396
|
|
|
397 const DataLayout &Module::getDataLayout() const { return DL; }
|
|
|
398
|
|
|
399 DICompileUnit *Module::debug_compile_units_iterator::operator*() const {
|
|
|
400 return cast<DICompileUnit>(CUs->getOperand(Idx));
|
|
|
401 }
|
|
|
402 DICompileUnit *Module::debug_compile_units_iterator::operator->() const {
|
|
|
403 return cast<DICompileUnit>(CUs->getOperand(Idx));
|
|
|
404 }
|
|
|
405
|
|
|
406 void Module::debug_compile_units_iterator::SkipNoDebugCUs() {
|
|
|
407 while (CUs && (Idx < CUs->getNumOperands()) &&
|
|
|
408 ((*this)->getEmissionKind() == DICompileUnit::NoDebug))
|
|
|
409 ++Idx;
|
|
|
410 }
|
|
|
411
|
|
|
412 iterator_range<Module::global_object_iterator> Module::global_objects() {
|
|
|
413 return concat<GlobalObject>(functions(), globals());
|
|
|
414 }
|
|
|
415 iterator_range<Module::const_global_object_iterator>
|
|
|
416 Module::global_objects() const {
|
|
|
417 return concat<const GlobalObject>(functions(), globals());
|
|
|
418 }
|
|
|
419
|
|
|
420 iterator_range<Module::global_value_iterator> Module::global_values() {
|
|
|
421 return concat<GlobalValue>(functions(), globals(), aliases(), ifuncs());
|
|
|
422 }
|
|
|
423 iterator_range<Module::const_global_value_iterator>
|
|
|
424 Module::global_values() const {
|
|
|
425 return concat<const GlobalValue>(functions(), globals(), aliases(), ifuncs());
|
|
|
426 }
|
|
|
427
|
|
|
428 //===----------------------------------------------------------------------===//
|
|
|
429 // Methods to control the materialization of GlobalValues in the Module.
|
|
|
430 //
|
|
|
431 void Module::setMaterializer(GVMaterializer *GVM) {
|
|
|
432 assert(!Materializer &&
|
|
|
433 "Module already has a GVMaterializer. Call materializeAll"
|
|
|
434 " to clear it out before setting another one.");
|
|
|
435 Materializer.reset(GVM);
|
|
|
436 }
|
|
|
437
|
|
|
438 Error Module::materialize(GlobalValue *GV) {
|
|
|
439 if (!Materializer)
|
|
|
440 return Error::success();
|
|
|
441
|
|
|
442 return Materializer->materialize(GV);
|
|
|
443 }
|
|
|
444
|
|
|
445 Error Module::materializeAll() {
|
|
|
446 if (!Materializer)
|
|
|
447 return Error::success();
|
|
|
448 std::unique_ptr<GVMaterializer> M = std::move(Materializer);
|
|
|
449 return M->materializeModule();
|
|
|
450 }
|
|
|
451
|
|
|
452 Error Module::materializeMetadata() {
|
|
|
453 if (!Materializer)
|
|
|
454 return Error::success();
|
|
|
455 return Materializer->materializeMetadata();
|
|
|
456 }
|
|
|
457
|
|
|
458 //===----------------------------------------------------------------------===//
|
|
|
459 // Other module related stuff.
|
|
|
460 //
|
|
|
461
|
|
|
462 std::vector<StructType *> Module::getIdentifiedStructTypes() const {
|
|
|
463 // If we have a materializer, it is possible that some unread function
|
|
|
464 // uses a type that is currently not visible to a TypeFinder, so ask
|
|
|
465 // the materializer which types it created.
|
|
|
466 if (Materializer)
|
|
|
467 return Materializer->getIdentifiedStructTypes();
|
|
|
468
|
|
|
469 std::vector<StructType *> Ret;
|
|
|
470 TypeFinder SrcStructTypes;
|
|
|
471 SrcStructTypes.run(*this, true);
|
|
|
472 Ret.assign(SrcStructTypes.begin(), SrcStructTypes.end());
|
|
|
473 return Ret;
|
|
|
474 }
|
|
|
475
|
|
221
|
476 std::string Module::getUniqueIntrinsicName(StringRef BaseName, Intrinsic::ID Id,
|
|
|
477 const FunctionType *Proto) {
|
|
|
478 auto Encode = [&BaseName](unsigned Suffix) {
|
|
|
479 return (Twine(BaseName) + "." + Twine(Suffix)).str();
|
|
|
480 };
|
|
|
481
|
|
|
482 {
|
|
|
483 // fast path - the prototype is already known
|
|
|
484 auto UinItInserted = UniquedIntrinsicNames.insert({{Id, Proto}, 0});
|
|
|
485 if (!UinItInserted.second)
|
|
|
486 return Encode(UinItInserted.first->second);
|
|
|
487 }
|
|
|
488
|
|
|
489 // Not known yet. A new entry was created with index 0. Check if there already
|
|
|
490 // exists a matching declaration, or select a new entry.
|
|
|
491
|
|
|
492 // Start looking for names with the current known maximum count (or 0).
|
|
|
493 auto NiidItInserted = CurrentIntrinsicIds.insert({BaseName, 0});
|
|
|
494 unsigned Count = NiidItInserted.first->second;
|
|
|
495
|
|
|
496 // This might be slow if a whole population of intrinsics already existed, but
|
|
|
497 // we cache the values for later usage.
|
|
|
498 std::string NewName;
|
|
|
499 while (true) {
|
|
|
500 NewName = Encode(Count);
|
|
|
501 GlobalValue *F = getNamedValue(NewName);
|
|
|
502 if (!F) {
|
|
|
503 // Reserve this entry for the new proto
|
|
|
504 UniquedIntrinsicNames[{Id, Proto}] = Count;
|
|
|
505 break;
|
|
|
506 }
|
|
|
507
|
|
|
508 // A declaration with this name already exists. Remember it.
|
|
|
509 FunctionType *FT = dyn_cast<FunctionType>(F->getType()->getElementType());
|
|
|
510 auto UinItInserted = UniquedIntrinsicNames.insert({{Id, FT}, Count});
|
|
|
511 if (FT == Proto) {
|
|
|
512 // It was a declaration for our prototype. This entry was allocated in the
|
|
|
513 // beginning. Update the count to match the existing declaration.
|
|
|
514 UinItInserted.first->second = Count;
|
|
|
515 break;
|
|
|
516 }
|
|
|
517
|
|
|
518 ++Count;
|
|
|
519 }
|
|
|
520
|
|
|
521 NiidItInserted.first->second = Count + 1;
|
|
|
522
|
|
|
523 return NewName;
|
|
|
524 }
|
|
|
525
|
|
150
|
526 // dropAllReferences() - This function causes all the subelements to "let go"
|
|
|
527 // of all references that they are maintaining. This allows one to 'delete' a
|
|
|
528 // whole module at a time, even though there may be circular references... first
|
|
|
529 // all references are dropped, and all use counts go to zero. Then everything
|
|
|
530 // is deleted for real. Note that no operations are valid on an object that
|
|
|
531 // has "dropped all references", except operator delete.
|
|
|
532 //
|
|
|
533 void Module::dropAllReferences() {
|
|
|
534 for (Function &F : *this)
|
|
|
535 F.dropAllReferences();
|
|
|
536
|
|
|
537 for (GlobalVariable &GV : globals())
|
|
|
538 GV.dropAllReferences();
|
|
|
539
|
|
|
540 for (GlobalAlias &GA : aliases())
|
|
|
541 GA.dropAllReferences();
|
|
|
542
|
|
|
543 for (GlobalIFunc &GIF : ifuncs())
|
|
|
544 GIF.dropAllReferences();
|
|
|
545 }
|
|
|
546
|
|
|
547 unsigned Module::getNumberRegisterParameters() const {
|
|
|
548 auto *Val =
|
|
|
549 cast_or_null<ConstantAsMetadata>(getModuleFlag("NumRegisterParameters"));
|
|
|
550 if (!Val)
|
|
|
551 return 0;
|
|
|
552 return cast<ConstantInt>(Val->getValue())->getZExtValue();
|
|
|
553 }
|
|
|
554
|
|
|
555 unsigned Module::getDwarfVersion() const {
|
|
|
556 auto *Val = cast_or_null<ConstantAsMetadata>(getModuleFlag("Dwarf Version"));
|
|
|
557 if (!Val)
|
|
|
558 return 0;
|
|
|
559 return cast<ConstantInt>(Val->getValue())->getZExtValue();
|
|
|
560 }
|
|
|
561
|
|
221
|
562 bool Module::isDwarf64() const {
|
|
|
563 auto *Val = cast_or_null<ConstantAsMetadata>(getModuleFlag("DWARF64"));
|
|
|
564 return Val && cast<ConstantInt>(Val->getValue())->isOne();
|
|
|
565 }
|
|
|
566
|
|
150
|
567 unsigned Module::getCodeViewFlag() const {
|
|
|
568 auto *Val = cast_or_null<ConstantAsMetadata>(getModuleFlag("CodeView"));
|
|
|
569 if (!Val)
|
|
|
570 return 0;
|
|
|
571 return cast<ConstantInt>(Val->getValue())->getZExtValue();
|
|
|
572 }
|
|
|
573
|
|
221
|
574 unsigned Module::getInstructionCount() const {
|
|
150
|
575 unsigned NumInstrs = 0;
|
|
221
|
576 for (const Function &F : FunctionList)
|
|
150
|
577 NumInstrs += F.getInstructionCount();
|
|
|
578 return NumInstrs;
|
|
|
579 }
|
|
|
580
|
|
|
581 Comdat *Module::getOrInsertComdat(StringRef Name) {
|
|
|
582 auto &Entry = *ComdatSymTab.insert(std::make_pair(Name, Comdat())).first;
|
|
|
583 Entry.second.Name = &Entry;
|
|
|
584 return &Entry.second;
|
|
|
585 }
|
|
|
586
|
|
|
587 PICLevel::Level Module::getPICLevel() const {
|
|
|
588 auto *Val = cast_or_null<ConstantAsMetadata>(getModuleFlag("PIC Level"));
|
|
|
589
|
|
|
590 if (!Val)
|
|
|
591 return PICLevel::NotPIC;
|
|
|
592
|
|
|
593 return static_cast<PICLevel::Level>(
|
|
|
594 cast<ConstantInt>(Val->getValue())->getZExtValue());
|
|
|
595 }
|
|
|
596
|
|
|
597 void Module::setPICLevel(PICLevel::Level PL) {
|
|
|
598 addModuleFlag(ModFlagBehavior::Max, "PIC Level", PL);
|
|
|
599 }
|
|
|
600
|
|
|
601 PIELevel::Level Module::getPIELevel() const {
|
|
|
602 auto *Val = cast_or_null<ConstantAsMetadata>(getModuleFlag("PIE Level"));
|
|
|
603
|
|
|
604 if (!Val)
|
|
|
605 return PIELevel::Default;
|
|
|
606
|
|
|
607 return static_cast<PIELevel::Level>(
|
|
|
608 cast<ConstantInt>(Val->getValue())->getZExtValue());
|
|
|
609 }
|
|
|
610
|
|
|
611 void Module::setPIELevel(PIELevel::Level PL) {
|
|
|
612 addModuleFlag(ModFlagBehavior::Max, "PIE Level", PL);
|
|
|
613 }
|
|
|
614
|
|
|
615 Optional<CodeModel::Model> Module::getCodeModel() const {
|
|
|
616 auto *Val = cast_or_null<ConstantAsMetadata>(getModuleFlag("Code Model"));
|
|
|
617
|
|
|
618 if (!Val)
|
|
|
619 return None;
|
|
|
620
|
|
|
621 return static_cast<CodeModel::Model>(
|
|
|
622 cast<ConstantInt>(Val->getValue())->getZExtValue());
|
|
|
623 }
|
|
|
624
|
|
|
625 void Module::setCodeModel(CodeModel::Model CL) {
|
|
|
626 // Linking object files with different code models is undefined behavior
|
|
|
627 // because the compiler would have to generate additional code (to span
|
|
|
628 // longer jumps) if a larger code model is used with a smaller one.
|
|
|
629 // Therefore we will treat attempts to mix code models as an error.
|
|
|
630 addModuleFlag(ModFlagBehavior::Error, "Code Model", CL);
|
|
|
631 }
|
|
|
632
|
|
|
633 void Module::setProfileSummary(Metadata *M, ProfileSummary::Kind Kind) {
|
|
|
634 if (Kind == ProfileSummary::PSK_CSInstr)
|
|
173
|
635 setModuleFlag(ModFlagBehavior::Error, "CSProfileSummary", M);
|
|
150
|
636 else
|
|
173
|
637 setModuleFlag(ModFlagBehavior::Error, "ProfileSummary", M);
|
|
150
|
638 }
|
|
|
639
|
|
221
|
640 Metadata *Module::getProfileSummary(bool IsCS) const {
|
|
150
|
641 return (IsCS ? getModuleFlag("CSProfileSummary")
|
|
|
642 : getModuleFlag("ProfileSummary"));
|
|
|
643 }
|
|
|
644
|
|
|
645 bool Module::getSemanticInterposition() const {
|
|
|
646 Metadata *MF = getModuleFlag("SemanticInterposition");
|
|
|
647
|
|
|
648 auto *Val = cast_or_null<ConstantAsMetadata>(MF);
|
|
|
649 if (!Val)
|
|
|
650 return false;
|
|
|
651
|
|
|
652 return cast<ConstantInt>(Val->getValue())->getZExtValue();
|
|
|
653 }
|
|
|
654
|
|
|
655 void Module::setSemanticInterposition(bool SI) {
|
|
|
656 addModuleFlag(ModFlagBehavior::Error, "SemanticInterposition", SI);
|
|
|
657 }
|
|
|
658
|
|
|
659 void Module::setOwnedMemoryBuffer(std::unique_ptr<MemoryBuffer> MB) {
|
|
|
660 OwnedMemoryBuffer = std::move(MB);
|
|
|
661 }
|
|
|
662
|
|
|
663 bool Module::getRtLibUseGOT() const {
|
|
|
664 auto *Val = cast_or_null<ConstantAsMetadata>(getModuleFlag("RtLibUseGOT"));
|
|
|
665 return Val && (cast<ConstantInt>(Val->getValue())->getZExtValue() > 0);
|
|
|
666 }
|
|
|
667
|
|
|
668 void Module::setRtLibUseGOT() {
|
|
|
669 addModuleFlag(ModFlagBehavior::Max, "RtLibUseGOT", 1);
|
|
|
670 }
|
|
|
671
|
|
221
|
672 bool Module::getUwtable() const {
|
|
|
673 auto *Val = cast_or_null<ConstantAsMetadata>(getModuleFlag("uwtable"));
|
|
|
674 return Val && (cast<ConstantInt>(Val->getValue())->getZExtValue() > 0);
|
|
|
675 }
|
|
|
676
|
|
|
677 void Module::setUwtable() { addModuleFlag(ModFlagBehavior::Max, "uwtable", 1); }
|
|
|
678
|
|
|
679 FramePointerKind Module::getFramePointer() const {
|
|
|
680 auto *Val = cast_or_null<ConstantAsMetadata>(getModuleFlag("frame-pointer"));
|
|
|
681 return static_cast<FramePointerKind>(
|
|
|
682 Val ? cast<ConstantInt>(Val->getValue())->getZExtValue() : 0);
|
|
|
683 }
|
|
|
684
|
|
|
685 void Module::setFramePointer(FramePointerKind Kind) {
|
|
|
686 addModuleFlag(ModFlagBehavior::Max, "frame-pointer", static_cast<int>(Kind));
|
|
|
687 }
|
|
|
688
|
|
|
689 StringRef Module::getStackProtectorGuard() const {
|
|
|
690 Metadata *MD = getModuleFlag("stack-protector-guard");
|
|
|
691 if (auto *MDS = dyn_cast_or_null<MDString>(MD))
|
|
|
692 return MDS->getString();
|
|
|
693 return {};
|
|
|
694 }
|
|
|
695
|
|
|
696 void Module::setStackProtectorGuard(StringRef Kind) {
|
|
|
697 MDString *ID = MDString::get(getContext(), Kind);
|
|
|
698 addModuleFlag(ModFlagBehavior::Error, "stack-protector-guard", ID);
|
|
|
699 }
|
|
|
700
|
|
|
701 StringRef Module::getStackProtectorGuardReg() const {
|
|
|
702 Metadata *MD = getModuleFlag("stack-protector-guard-reg");
|
|
|
703 if (auto *MDS = dyn_cast_or_null<MDString>(MD))
|
|
|
704 return MDS->getString();
|
|
|
705 return {};
|
|
|
706 }
|
|
|
707
|
|
|
708 void Module::setStackProtectorGuardReg(StringRef Reg) {
|
|
|
709 MDString *ID = MDString::get(getContext(), Reg);
|
|
|
710 addModuleFlag(ModFlagBehavior::Error, "stack-protector-guard-reg", ID);
|
|
|
711 }
|
|
|
712
|
|
|
713 int Module::getStackProtectorGuardOffset() const {
|
|
|
714 Metadata *MD = getModuleFlag("stack-protector-guard-offset");
|
|
|
715 if (auto *CI = mdconst::dyn_extract_or_null<ConstantInt>(MD))
|
|
|
716 return CI->getSExtValue();
|
|
|
717 return INT_MAX;
|
|
|
718 }
|
|
|
719
|
|
|
720 void Module::setStackProtectorGuardOffset(int Offset) {
|
|
|
721 addModuleFlag(ModFlagBehavior::Error, "stack-protector-guard-offset", Offset);
|
|
|
722 }
|
|
|
723
|
|
150
|
724 void Module::setSDKVersion(const VersionTuple &V) {
|
|
|
725 SmallVector<unsigned, 3> Entries;
|
|
|
726 Entries.push_back(V.getMajor());
|
|
|
727 if (auto Minor = V.getMinor()) {
|
|
|
728 Entries.push_back(*Minor);
|
|
|
729 if (auto Subminor = V.getSubminor())
|
|
|
730 Entries.push_back(*Subminor);
|
|
|
731 // Ignore the 'build' component as it can't be represented in the object
|
|
|
732 // file.
|
|
|
733 }
|
|
|
734 addModuleFlag(ModFlagBehavior::Warning, "SDK Version",
|
|
|
735 ConstantDataArray::get(Context, Entries));
|
|
|
736 }
|
|
|
737
|
|
|
738 VersionTuple Module::getSDKVersion() const {
|
|
|
739 auto *CM = dyn_cast_or_null<ConstantAsMetadata>(getModuleFlag("SDK Version"));
|
|
|
740 if (!CM)
|
|
|
741 return {};
|
|
|
742 auto *Arr = dyn_cast_or_null<ConstantDataArray>(CM->getValue());
|
|
|
743 if (!Arr)
|
|
|
744 return {};
|
|
|
745 auto getVersionComponent = [&](unsigned Index) -> Optional<unsigned> {
|
|
|
746 if (Index >= Arr->getNumElements())
|
|
|
747 return None;
|
|
|
748 return (unsigned)Arr->getElementAsInteger(Index);
|
|
|
749 };
|
|
|
750 auto Major = getVersionComponent(0);
|
|
|
751 if (!Major)
|
|
|
752 return {};
|
|
|
753 VersionTuple Result = VersionTuple(*Major);
|
|
|
754 if (auto Minor = getVersionComponent(1)) {
|
|
|
755 Result = VersionTuple(*Major, *Minor);
|
|
|
756 if (auto Subminor = getVersionComponent(2)) {
|
|
|
757 Result = VersionTuple(*Major, *Minor, *Subminor);
|
|
|
758 }
|
|
|
759 }
|
|
|
760 return Result;
|
|
|
761 }
|
|
|
762
|
|
|
763 GlobalVariable *llvm::collectUsedGlobalVariables(
|
|
221
|
764 const Module &M, SmallVectorImpl<GlobalValue *> &Vec, bool CompilerUsed) {
|
|
150
|
765 const char *Name = CompilerUsed ? "llvm.compiler.used" : "llvm.used";
|
|
|
766 GlobalVariable *GV = M.getGlobalVariable(Name);
|
|
|
767 if (!GV || !GV->hasInitializer())
|
|
|
768 return GV;
|
|
|
769
|
|
|
770 const ConstantArray *Init = cast<ConstantArray>(GV->getInitializer());
|
|
|
771 for (Value *Op : Init->operands()) {
|
|
|
772 GlobalValue *G = cast<GlobalValue>(Op->stripPointerCasts());
|
|
221
|
773 Vec.push_back(G);
|
|
150
|
774 }
|
|
|
775 return GV;
|
|
|
776 }
|
|
221
|
777
|
|
|
778 void Module::setPartialSampleProfileRatio(const ModuleSummaryIndex &Index) {
|
|
|
779 if (auto *SummaryMD = getProfileSummary(/*IsCS*/ false)) {
|
|
|
780 std::unique_ptr<ProfileSummary> ProfileSummary(
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781 ProfileSummary::getFromMD(SummaryMD));
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782 if (ProfileSummary) {
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783 if (ProfileSummary->getKind() != ProfileSummary::PSK_Sample ||
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784 !ProfileSummary->isPartialProfile())
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785 return;
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786 uint64_t BlockCount = Index.getBlockCount();
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787 uint32_t NumCounts = ProfileSummary->getNumCounts();
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788 if (!NumCounts)
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789 return;
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790 double Ratio = (double)BlockCount / NumCounts;
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791 ProfileSummary->setPartialProfileRatio(Ratio);
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792 setProfileSummary(ProfileSummary->getMD(getContext()),
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793 ProfileSummary::PSK_Sample);
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794 }
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795 }
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796 }
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