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authorDimitry Andric <dim@FreeBSD.org>2019-12-20 19:53:05 +0000
committerDimitry Andric <dim@FreeBSD.org>2019-12-20 19:53:05 +0000
commit0b57cec536236d46e3dba9bd041533462f33dbb7 (patch)
tree56229dbdbbf76d18580f72f789003db17246c8d9 /contrib/llvm/lib/IR/Module.cpp
parent718ef55ec7785aae63f98f8ca05dc07ed399c16d (diff)
Notes
Diffstat (limited to 'contrib/llvm/lib/IR/Module.cpp')
-rw-r--r--contrib/llvm/lib/IR/Module.cpp611
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diff --git a/contrib/llvm/lib/IR/Module.cpp b/contrib/llvm/lib/IR/Module.cpp
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-//===- Module.cpp - Implement the Module class ----------------------------===//
-//
-// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-// See https://llvm.org/LICENSE.txt for license information.
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-//
-//===----------------------------------------------------------------------===//
-//
-// This file implements the Module class for the IR library.
-//
-//===----------------------------------------------------------------------===//
-
-#include "llvm/IR/Module.h"
-#include "SymbolTableListTraitsImpl.h"
-#include "llvm/ADT/Optional.h"
-#include "llvm/ADT/SmallPtrSet.h"
-#include "llvm/ADT/SmallString.h"
-#include "llvm/ADT/SmallVector.h"
-#include "llvm/ADT/StringMap.h"
-#include "llvm/ADT/StringRef.h"
-#include "llvm/ADT/Twine.h"
-#include "llvm/IR/Attributes.h"
-#include "llvm/IR/Comdat.h"
-#include "llvm/IR/Constants.h"
-#include "llvm/IR/DataLayout.h"
-#include "llvm/IR/DebugInfoMetadata.h"
-#include "llvm/IR/DerivedTypes.h"
-#include "llvm/IR/Function.h"
-#include "llvm/IR/GVMaterializer.h"
-#include "llvm/IR/GlobalAlias.h"
-#include "llvm/IR/GlobalIFunc.h"
-#include "llvm/IR/GlobalValue.h"
-#include "llvm/IR/GlobalVariable.h"
-#include "llvm/IR/LLVMContext.h"
-#include "llvm/IR/Metadata.h"
-#include "llvm/IR/SymbolTableListTraits.h"
-#include "llvm/IR/Type.h"
-#include "llvm/IR/TypeFinder.h"
-#include "llvm/IR/Value.h"
-#include "llvm/IR/ValueSymbolTable.h"
-#include "llvm/Pass.h"
-#include "llvm/Support/Casting.h"
-#include "llvm/Support/CodeGen.h"
-#include "llvm/Support/Error.h"
-#include "llvm/Support/MemoryBuffer.h"
-#include "llvm/Support/Path.h"
-#include "llvm/Support/RandomNumberGenerator.h"
-#include "llvm/Support/VersionTuple.h"
-#include <algorithm>
-#include <cassert>
-#include <cstdint>
-#include <memory>
-#include <utility>
-#include <vector>
-
-using namespace llvm;
-
-//===----------------------------------------------------------------------===//
-// Methods to implement the globals and functions lists.
-//
-
-// Explicit instantiations of SymbolTableListTraits since some of the methods
-// are not in the public header file.
-template class llvm::SymbolTableListTraits<Function>;
-template class llvm::SymbolTableListTraits<GlobalVariable>;
-template class llvm::SymbolTableListTraits<GlobalAlias>;
-template class llvm::SymbolTableListTraits<GlobalIFunc>;
-
-//===----------------------------------------------------------------------===//
-// Primitive Module methods.
-//
-
-Module::Module(StringRef MID, LLVMContext &C)
- : Context(C), Materializer(), ModuleID(MID), SourceFileName(MID), DL("") {
- ValSymTab = new ValueSymbolTable();
- NamedMDSymTab = new StringMap<NamedMDNode *>();
- Context.addModule(this);
-}
-
-Module::~Module() {
- Context.removeModule(this);
- dropAllReferences();
- GlobalList.clear();
- FunctionList.clear();
- AliasList.clear();
- IFuncList.clear();
- NamedMDList.clear();
- delete ValSymTab;
- delete static_cast<StringMap<NamedMDNode *> *>(NamedMDSymTab);
-}
-
-std::unique_ptr<RandomNumberGenerator> Module::createRNG(const Pass* P) const {
- SmallString<32> Salt(P->getPassName());
-
- // This RNG is guaranteed to produce the same random stream only
- // when the Module ID and thus the input filename is the same. This
- // might be problematic if the input filename extension changes
- // (e.g. from .c to .bc or .ll).
- //
- // We could store this salt in NamedMetadata, but this would make
- // the parameter non-const. This would unfortunately make this
- // interface unusable by any Machine passes, since they only have a
- // const reference to their IR Module. Alternatively we can always
- // store salt metadata from the Module constructor.
- Salt += sys::path::filename(getModuleIdentifier());
-
- return std::unique_ptr<RandomNumberGenerator>(new RandomNumberGenerator(Salt));
-}
-
-/// getNamedValue - Return the first global value in the module with
-/// the specified name, of arbitrary type. This method returns null
-/// if a global with the specified name is not found.
-GlobalValue *Module::getNamedValue(StringRef Name) const {
- return cast_or_null<GlobalValue>(getValueSymbolTable().lookup(Name));
-}
-
-/// getMDKindID - Return a unique non-zero ID for the specified metadata kind.
-/// This ID is uniqued across modules in the current LLVMContext.
-unsigned Module::getMDKindID(StringRef Name) const {
- return Context.getMDKindID(Name);
-}
-
-/// getMDKindNames - Populate client supplied SmallVector with the name for
-/// custom metadata IDs registered in this LLVMContext. ID #0 is not used,
-/// so it is filled in as an empty string.
-void Module::getMDKindNames(SmallVectorImpl<StringRef> &Result) const {
- return Context.getMDKindNames(Result);
-}
-
-void Module::getOperandBundleTags(SmallVectorImpl<StringRef> &Result) const {
- return Context.getOperandBundleTags(Result);
-}
-
-//===----------------------------------------------------------------------===//
-// Methods for easy access to the functions in the module.
-//
-
-// getOrInsertFunction - Look up the specified function in the module symbol
-// table. If it does not exist, add a prototype for the function and return
-// it. This is nice because it allows most passes to get away with not handling
-// the symbol table directly for this common task.
-//
-FunctionCallee Module::getOrInsertFunction(StringRef Name, FunctionType *Ty,
- AttributeList AttributeList) {
- // See if we have a definition for the specified function already.
- GlobalValue *F = getNamedValue(Name);
- if (!F) {
- // Nope, add it
- Function *New = Function::Create(Ty, GlobalVariable::ExternalLinkage,
- DL.getProgramAddressSpace(), Name);
- if (!New->isIntrinsic()) // Intrinsics get attrs set on construction
- New->setAttributes(AttributeList);
- FunctionList.push_back(New);
- return {Ty, New}; // Return the new prototype.
- }
-
- // If the function exists but has the wrong type, return a bitcast to the
- // right type.
- auto *PTy = PointerType::get(Ty, F->getAddressSpace());
- if (F->getType() != PTy)
- return {Ty, ConstantExpr::getBitCast(F, PTy)};
-
- // Otherwise, we just found the existing function or a prototype.
- return {Ty, F};
-}
-
-FunctionCallee Module::getOrInsertFunction(StringRef Name, FunctionType *Ty) {
- return getOrInsertFunction(Name, Ty, AttributeList());
-}
-
-// getFunction - Look up the specified function in the module symbol table.
-// If it does not exist, return null.
-//
-Function *Module::getFunction(StringRef Name) const {
- return dyn_cast_or_null<Function>(getNamedValue(Name));
-}
-
-//===----------------------------------------------------------------------===//
-// Methods for easy access to the global variables in the module.
-//
-
-/// getGlobalVariable - Look up the specified global variable in the module
-/// symbol table. If it does not exist, return null. The type argument
-/// should be the underlying type of the global, i.e., it should not have
-/// the top-level PointerType, which represents the address of the global.
-/// If AllowLocal is set to true, this function will return types that
-/// have an local. By default, these types are not returned.
-///
-GlobalVariable *Module::getGlobalVariable(StringRef Name,
- bool AllowLocal) const {
- if (GlobalVariable *Result =
- dyn_cast_or_null<GlobalVariable>(getNamedValue(Name)))
- if (AllowLocal || !Result->hasLocalLinkage())
- return Result;
- return nullptr;
-}
-
-/// getOrInsertGlobal - Look up the specified global in the module symbol table.
-/// 1. If it does not exist, add a declaration of the global and return it.
-/// 2. Else, the global exists but has the wrong type: return the function
-/// with a constantexpr cast to the right type.
-/// 3. Finally, if the existing global is the correct declaration, return the
-/// existing global.
-Constant *Module::getOrInsertGlobal(
- StringRef Name, Type *Ty,
- function_ref<GlobalVariable *()> CreateGlobalCallback) {
- // See if we have a definition for the specified global already.
- GlobalVariable *GV = dyn_cast_or_null<GlobalVariable>(getNamedValue(Name));
- if (!GV)
- GV = CreateGlobalCallback();
- assert(GV && "The CreateGlobalCallback is expected to create a global");
-
- // If the variable exists but has the wrong type, return a bitcast to the
- // right type.
- Type *GVTy = GV->getType();
- PointerType *PTy = PointerType::get(Ty, GVTy->getPointerAddressSpace());
- if (GVTy != PTy)
- return ConstantExpr::getBitCast(GV, PTy);
-
- // Otherwise, we just found the existing function or a prototype.
- return GV;
-}
-
-// Overload to construct a global variable using its constructor's defaults.
-Constant *Module::getOrInsertGlobal(StringRef Name, Type *Ty) {
- return getOrInsertGlobal(Name, Ty, [&] {
- return new GlobalVariable(*this, Ty, false, GlobalVariable::ExternalLinkage,
- nullptr, Name);
- });
-}
-
-//===----------------------------------------------------------------------===//
-// Methods for easy access to the global variables in the module.
-//
-
-// getNamedAlias - Look up the specified global in the module symbol table.
-// If it does not exist, return null.
-//
-GlobalAlias *Module::getNamedAlias(StringRef Name) const {
- return dyn_cast_or_null<GlobalAlias>(getNamedValue(Name));
-}
-
-GlobalIFunc *Module::getNamedIFunc(StringRef Name) const {
- return dyn_cast_or_null<GlobalIFunc>(getNamedValue(Name));
-}
-
-/// getNamedMetadata - Return the first NamedMDNode in the module with the
-/// specified name. This method returns null if a NamedMDNode with the
-/// specified name is not found.
-NamedMDNode *Module::getNamedMetadata(const Twine &Name) const {
- SmallString<256> NameData;
- StringRef NameRef = Name.toStringRef(NameData);
- return static_cast<StringMap<NamedMDNode*> *>(NamedMDSymTab)->lookup(NameRef);
-}
-
-/// getOrInsertNamedMetadata - Return the first named MDNode in the module
-/// with the specified name. This method returns a new NamedMDNode if a
-/// NamedMDNode with the specified name is not found.
-NamedMDNode *Module::getOrInsertNamedMetadata(StringRef Name) {
- NamedMDNode *&NMD =
- (*static_cast<StringMap<NamedMDNode *> *>(NamedMDSymTab))[Name];
- if (!NMD) {
- NMD = new NamedMDNode(Name);
- NMD->setParent(this);
- NamedMDList.push_back(NMD);
- }
- return NMD;
-}
-
-/// eraseNamedMetadata - Remove the given NamedMDNode from this module and
-/// delete it.
-void Module::eraseNamedMetadata(NamedMDNode *NMD) {
- static_cast<StringMap<NamedMDNode *> *>(NamedMDSymTab)->erase(NMD->getName());
- NamedMDList.erase(NMD->getIterator());
-}
-
-bool Module::isValidModFlagBehavior(Metadata *MD, ModFlagBehavior &MFB) {
- if (ConstantInt *Behavior = mdconst::dyn_extract_or_null<ConstantInt>(MD)) {
- uint64_t Val = Behavior->getLimitedValue();
- if (Val >= ModFlagBehaviorFirstVal && Val <= ModFlagBehaviorLastVal) {
- MFB = static_cast<ModFlagBehavior>(Val);
- return true;
- }
- }
- return false;
-}
-
-/// getModuleFlagsMetadata - Returns the module flags in the provided vector.
-void Module::
-getModuleFlagsMetadata(SmallVectorImpl<ModuleFlagEntry> &Flags) const {
- const NamedMDNode *ModFlags = getModuleFlagsMetadata();
- if (!ModFlags) return;
-
- for (const MDNode *Flag : ModFlags->operands()) {
- ModFlagBehavior MFB;
- if (Flag->getNumOperands() >= 3 &&
- isValidModFlagBehavior(Flag->getOperand(0), MFB) &&
- dyn_cast_or_null<MDString>(Flag->getOperand(1))) {
- // Check the operands of the MDNode before accessing the operands.
- // The verifier will actually catch these failures.
- MDString *Key = cast<MDString>(Flag->getOperand(1));
- Metadata *Val = Flag->getOperand(2);
- Flags.push_back(ModuleFlagEntry(MFB, Key, Val));
- }
- }
-}
-
-/// Return the corresponding value if Key appears in module flags, otherwise
-/// return null.
-Metadata *Module::getModuleFlag(StringRef Key) const {
- SmallVector<Module::ModuleFlagEntry, 8> ModuleFlags;
- getModuleFlagsMetadata(ModuleFlags);
- for (const ModuleFlagEntry &MFE : ModuleFlags) {
- if (Key == MFE.Key->getString())
- return MFE.Val;
- }
- return nullptr;
-}
-
-/// getModuleFlagsMetadata - Returns the NamedMDNode in the module that
-/// represents module-level flags. This method returns null if there are no
-/// module-level flags.
-NamedMDNode *Module::getModuleFlagsMetadata() const {
- return getNamedMetadata("llvm.module.flags");
-}
-
-/// getOrInsertModuleFlagsMetadata - Returns the NamedMDNode in the module that
-/// represents module-level flags. If module-level flags aren't found, it
-/// creates the named metadata that contains them.
-NamedMDNode *Module::getOrInsertModuleFlagsMetadata() {
- return getOrInsertNamedMetadata("llvm.module.flags");
-}
-
-/// addModuleFlag - Add a module-level flag to the module-level flags
-/// metadata. It will create the module-level flags named metadata if it doesn't
-/// already exist.
-void Module::addModuleFlag(ModFlagBehavior Behavior, StringRef Key,
- Metadata *Val) {
- Type *Int32Ty = Type::getInt32Ty(Context);
- Metadata *Ops[3] = {
- ConstantAsMetadata::get(ConstantInt::get(Int32Ty, Behavior)),
- MDString::get(Context, Key), Val};
- getOrInsertModuleFlagsMetadata()->addOperand(MDNode::get(Context, Ops));
-}
-void Module::addModuleFlag(ModFlagBehavior Behavior, StringRef Key,
- Constant *Val) {
- addModuleFlag(Behavior, Key, ConstantAsMetadata::get(Val));
-}
-void Module::addModuleFlag(ModFlagBehavior Behavior, StringRef Key,
- uint32_t Val) {
- Type *Int32Ty = Type::getInt32Ty(Context);
- addModuleFlag(Behavior, Key, ConstantInt::get(Int32Ty, Val));
-}
-void Module::addModuleFlag(MDNode *Node) {
- assert(Node->getNumOperands() == 3 &&
- "Invalid number of operands for module flag!");
- assert(mdconst::hasa<ConstantInt>(Node->getOperand(0)) &&
- isa<MDString>(Node->getOperand(1)) &&
- "Invalid operand types for module flag!");
- getOrInsertModuleFlagsMetadata()->addOperand(Node);
-}
-
-void Module::setDataLayout(StringRef Desc) {
- DL.reset(Desc);
-}
-
-void Module::setDataLayout(const DataLayout &Other) { DL = Other; }
-
-const DataLayout &Module::getDataLayout() const { return DL; }
-
-DICompileUnit *Module::debug_compile_units_iterator::operator*() const {
- return cast<DICompileUnit>(CUs->getOperand(Idx));
-}
-DICompileUnit *Module::debug_compile_units_iterator::operator->() const {
- return cast<DICompileUnit>(CUs->getOperand(Idx));
-}
-
-void Module::debug_compile_units_iterator::SkipNoDebugCUs() {
- while (CUs && (Idx < CUs->getNumOperands()) &&
- ((*this)->getEmissionKind() == DICompileUnit::NoDebug))
- ++Idx;
-}
-
-//===----------------------------------------------------------------------===//
-// Methods to control the materialization of GlobalValues in the Module.
-//
-void Module::setMaterializer(GVMaterializer *GVM) {
- assert(!Materializer &&
- "Module already has a GVMaterializer. Call materializeAll"
- " to clear it out before setting another one.");
- Materializer.reset(GVM);
-}
-
-Error Module::materialize(GlobalValue *GV) {
- if (!Materializer)
- return Error::success();
-
- return Materializer->materialize(GV);
-}
-
-Error Module::materializeAll() {
- if (!Materializer)
- return Error::success();
- std::unique_ptr<GVMaterializer> M = std::move(Materializer);
- return M->materializeModule();
-}
-
-Error Module::materializeMetadata() {
- if (!Materializer)
- return Error::success();
- return Materializer->materializeMetadata();
-}
-
-//===----------------------------------------------------------------------===//
-// Other module related stuff.
-//
-
-std::vector<StructType *> Module::getIdentifiedStructTypes() const {
- // If we have a materializer, it is possible that some unread function
- // uses a type that is currently not visible to a TypeFinder, so ask
- // the materializer which types it created.
- if (Materializer)
- return Materializer->getIdentifiedStructTypes();
-
- std::vector<StructType *> Ret;
- TypeFinder SrcStructTypes;
- SrcStructTypes.run(*this, true);
- Ret.assign(SrcStructTypes.begin(), SrcStructTypes.end());
- return Ret;
-}
-
-// dropAllReferences() - This function causes all the subelements to "let go"
-// of all references that they are maintaining. This allows one to 'delete' a
-// whole module at a time, even though there may be circular references... first
-// all references are dropped, and all use counts go to zero. Then everything
-// is deleted for real. Note that no operations are valid on an object that
-// has "dropped all references", except operator delete.
-//
-void Module::dropAllReferences() {
- for (Function &F : *this)
- F.dropAllReferences();
-
- for (GlobalVariable &GV : globals())
- GV.dropAllReferences();
-
- for (GlobalAlias &GA : aliases())
- GA.dropAllReferences();
-
- for (GlobalIFunc &GIF : ifuncs())
- GIF.dropAllReferences();
-}
-
-unsigned Module::getNumberRegisterParameters() const {
- auto *Val =
- cast_or_null<ConstantAsMetadata>(getModuleFlag("NumRegisterParameters"));
- if (!Val)
- return 0;
- return cast<ConstantInt>(Val->getValue())->getZExtValue();
-}
-
-unsigned Module::getDwarfVersion() const {
- auto *Val = cast_or_null<ConstantAsMetadata>(getModuleFlag("Dwarf Version"));
- if (!Val)
- return 0;
- return cast<ConstantInt>(Val->getValue())->getZExtValue();
-}
-
-unsigned Module::getCodeViewFlag() const {
- auto *Val = cast_or_null<ConstantAsMetadata>(getModuleFlag("CodeView"));
- if (!Val)
- return 0;
- return cast<ConstantInt>(Val->getValue())->getZExtValue();
-}
-
-unsigned Module::getInstructionCount() {
- unsigned NumInstrs = 0;
- for (Function &F : FunctionList)
- NumInstrs += F.getInstructionCount();
- return NumInstrs;
-}
-
-Comdat *Module::getOrInsertComdat(StringRef Name) {
- auto &Entry = *ComdatSymTab.insert(std::make_pair(Name, Comdat())).first;
- Entry.second.Name = &Entry;
- return &Entry.second;
-}
-
-PICLevel::Level Module::getPICLevel() const {
- auto *Val = cast_or_null<ConstantAsMetadata>(getModuleFlag("PIC Level"));
-
- if (!Val)
- return PICLevel::NotPIC;
-
- return static_cast<PICLevel::Level>(
- cast<ConstantInt>(Val->getValue())->getZExtValue());
-}
-
-void Module::setPICLevel(PICLevel::Level PL) {
- addModuleFlag(ModFlagBehavior::Max, "PIC Level", PL);
-}
-
-PIELevel::Level Module::getPIELevel() const {
- auto *Val = cast_or_null<ConstantAsMetadata>(getModuleFlag("PIE Level"));
-
- if (!Val)
- return PIELevel::Default;
-
- return static_cast<PIELevel::Level>(
- cast<ConstantInt>(Val->getValue())->getZExtValue());
-}
-
-void Module::setPIELevel(PIELevel::Level PL) {
- addModuleFlag(ModFlagBehavior::Max, "PIE Level", PL);
-}
-
-Optional<CodeModel::Model> Module::getCodeModel() const {
- auto *Val = cast_or_null<ConstantAsMetadata>(getModuleFlag("Code Model"));
-
- if (!Val)
- return None;
-
- return static_cast<CodeModel::Model>(
- cast<ConstantInt>(Val->getValue())->getZExtValue());
-}
-
-void Module::setCodeModel(CodeModel::Model CL) {
- // Linking object files with different code models is undefined behavior
- // because the compiler would have to generate additional code (to span
- // longer jumps) if a larger code model is used with a smaller one.
- // Therefore we will treat attempts to mix code models as an error.
- addModuleFlag(ModFlagBehavior::Error, "Code Model", CL);
-}
-
-void Module::setProfileSummary(Metadata *M, ProfileSummary::Kind Kind) {
- if (Kind == ProfileSummary::PSK_CSInstr)
- addModuleFlag(ModFlagBehavior::Error, "CSProfileSummary", M);
- else
- addModuleFlag(ModFlagBehavior::Error, "ProfileSummary", M);
-}
-
-Metadata *Module::getProfileSummary(bool IsCS) {
- return (IsCS ? getModuleFlag("CSProfileSummary")
- : getModuleFlag("ProfileSummary"));
-}
-
-void Module::setOwnedMemoryBuffer(std::unique_ptr<MemoryBuffer> MB) {
- OwnedMemoryBuffer = std::move(MB);
-}
-
-bool Module::getRtLibUseGOT() const {
- auto *Val = cast_or_null<ConstantAsMetadata>(getModuleFlag("RtLibUseGOT"));
- return Val && (cast<ConstantInt>(Val->getValue())->getZExtValue() > 0);
-}
-
-void Module::setRtLibUseGOT() {
- addModuleFlag(ModFlagBehavior::Max, "RtLibUseGOT", 1);
-}
-
-void Module::setSDKVersion(const VersionTuple &V) {
- SmallVector<unsigned, 3> Entries;
- Entries.push_back(V.getMajor());
- if (auto Minor = V.getMinor()) {
- Entries.push_back(*Minor);
- if (auto Subminor = V.getSubminor())
- Entries.push_back(*Subminor);
- // Ignore the 'build' component as it can't be represented in the object
- // file.
- }
- addModuleFlag(ModFlagBehavior::Warning, "SDK Version",
- ConstantDataArray::get(Context, Entries));
-}
-
-VersionTuple Module::getSDKVersion() const {
- auto *CM = dyn_cast_or_null<ConstantAsMetadata>(getModuleFlag("SDK Version"));
- if (!CM)
- return {};
- auto *Arr = dyn_cast_or_null<ConstantDataArray>(CM->getValue());
- if (!Arr)
- return {};
- auto getVersionComponent = [&](unsigned Index) -> Optional<unsigned> {
- if (Index >= Arr->getNumElements())
- return None;
- return (unsigned)Arr->getElementAsInteger(Index);
- };
- auto Major = getVersionComponent(0);
- if (!Major)
- return {};
- VersionTuple Result = VersionTuple(*Major);
- if (auto Minor = getVersionComponent(1)) {
- Result = VersionTuple(*Major, *Minor);
- if (auto Subminor = getVersionComponent(2)) {
- Result = VersionTuple(*Major, *Minor, *Subminor);
- }
- }
- return Result;
-}
-
-GlobalVariable *llvm::collectUsedGlobalVariables(
- const Module &M, SmallPtrSetImpl<GlobalValue *> &Set, bool CompilerUsed) {
- const char *Name = CompilerUsed ? "llvm.compiler.used" : "llvm.used";
- GlobalVariable *GV = M.getGlobalVariable(Name);
- if (!GV || !GV->hasInitializer())
- return GV;
-
- const ConstantArray *Init = cast<ConstantArray>(GV->getInitializer());
- for (Value *Op : Init->operands()) {
- GlobalValue *G = cast<GlobalValue>(Op->stripPointerCastsNoFollowAliases());
- Set.insert(G);
- }
- return GV;
-}