#include "llvm/IR/Module.h"
#include "SymbolTableListTraitsImpl.h"
#include "llvm/ADT/DenseSet.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/ADT/SmallPtrSet.h"
#include "llvm/ADT/SmallString.h"
#include "llvm/ADT/StringExtras.h"
#include "llvm/IR/Constants.h"
#include "llvm/IR/DerivedTypes.h"
#include "llvm/IR/DebugInfoMetadata.h"
#include "llvm/IR/GVMaterializer.h"
#include "llvm/IR/InstrTypes.h"
#include "llvm/IR/LLVMContext.h"
#include "llvm/IR/TypeFinder.h"
#include "llvm/Support/Dwarf.h"
#include "llvm/Support/Path.h"
#include "llvm/Support/RandomNumberGenerator.h"
#include <algorithm>
#include <cstdarg>
#include <cstdlib>
using namespace llvm;
template class llvm::SymbolTableListTraits<Function>;
template class llvm::SymbolTableListTraits<GlobalVariable>;
template class llvm::SymbolTableListTraits<GlobalAlias>;
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();
NamedMDList.clear();
delete ValSymTab;
delete static_cast<StringMap<NamedMDNode *> *>(NamedMDSymTab);
}
RandomNumberGenerator *Module::createRNG(const Pass* P) const {
SmallString<32> Salt(P->getPassName());
Salt += sys::path::filename(getModuleIdentifier());
return new RandomNumberGenerator(Salt);
}
GlobalValue *Module::getNamedValue(StringRef Name) const {
return cast_or_null<GlobalValue>(getValueSymbolTable().lookup(Name));
}
unsigned Module::getMDKindID(StringRef Name) const {
return Context.getMDKindID(Name);
}
void Module::getMDKindNames(SmallVectorImpl<StringRef> &Result) const {
return Context.getMDKindNames(Result);
}
void Module::getOperandBundleTags(SmallVectorImpl<StringRef> &Result) const {
return Context.getOperandBundleTags(Result);
}
Constant *Module::getOrInsertFunction(StringRef Name,
FunctionType *Ty,
AttributeSet AttributeList) {
GlobalValue *F = getNamedValue(Name);
if (!F) {
Function *New = Function::Create(Ty, GlobalVariable::ExternalLinkage, Name);
if (!New->isIntrinsic()) New->setAttributes(AttributeList);
FunctionList.push_back(New);
return New; }
if (F->getType() != PointerType::getUnqual(Ty))
return ConstantExpr::getBitCast(F, PointerType::getUnqual(Ty));
return F;
}
Constant *Module::getOrInsertFunction(StringRef Name,
FunctionType *Ty) {
return getOrInsertFunction(Name, Ty, AttributeSet());
}
Constant *Module::getOrInsertFunction(StringRef Name,
AttributeSet AttributeList,
Type *RetTy, ...) {
va_list Args;
va_start(Args, RetTy);
std::vector<Type*> ArgTys;
while (Type *ArgTy = va_arg(Args, Type*))
ArgTys.push_back(ArgTy);
va_end(Args);
return getOrInsertFunction(Name,
FunctionType::get(RetTy, ArgTys, false),
AttributeList);
}
Constant *Module::getOrInsertFunction(StringRef Name,
Type *RetTy, ...) {
va_list Args;
va_start(Args, RetTy);
std::vector<Type*> ArgTys;
while (Type *ArgTy = va_arg(Args, Type*))
ArgTys.push_back(ArgTy);
va_end(Args);
return getOrInsertFunction(Name,
FunctionType::get(RetTy, ArgTys, false),
AttributeSet());
}
Function *Module::getFunction(StringRef Name) const {
return dyn_cast_or_null<Function>(getNamedValue(Name));
}
GlobalVariable *Module::getGlobalVariable(StringRef Name, bool AllowLocal) {
if (GlobalVariable *Result =
dyn_cast_or_null<GlobalVariable>(getNamedValue(Name)))
if (AllowLocal || !Result->hasLocalLinkage())
return Result;
return nullptr;
}
Constant *Module::getOrInsertGlobal(StringRef Name, Type *Ty) {
GlobalVariable *GV = dyn_cast_or_null<GlobalVariable>(getNamedValue(Name));
if (!GV) {
GlobalVariable *New =
new GlobalVariable(*this, Ty, false, GlobalVariable::ExternalLinkage,
nullptr, Name);
return New; }
Type *GVTy = GV->getType();
PointerType *PTy = PointerType::get(Ty, GVTy->getPointerAddressSpace());
if (GVTy != PTy)
return ConstantExpr::getBitCast(GV, PTy);
return GV;
}
GlobalAlias *Module::getNamedAlias(StringRef Name) const {
return dyn_cast_or_null<GlobalAlias>(getNamedValue(Name));
}
NamedMDNode *Module::getNamedMetadata(const Twine &Name) const {
SmallString<256> NameData;
StringRef NameRef = Name.toStringRef(NameData);
return static_cast<StringMap<NamedMDNode*> *>(NamedMDSymTab)->lookup(NameRef);
}
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;
}
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;
}
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))) {
MDString *Key = cast<MDString>(Flag->getOperand(1));
Metadata *Val = Flag->getOperand(2);
Flags.push_back(ModuleFlagEntry(MFB, Key, Val));
}
}
}
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;
}
NamedMDNode *Module::getModuleFlagsMetadata() const {
return getNamedMetadata("llvm.module.flags");
}
NamedMDNode *Module::getOrInsertModuleFlagsMetadata() {
return getOrInsertNamedMetadata("llvm.module.flags");
}
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;
}
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);
}
std::error_code Module::materialize(GlobalValue *GV) {
if (!Materializer)
return std::error_code();
return Materializer->materialize(GV);
}
std::error_code Module::materializeAll() {
if (!Materializer)
return std::error_code();
std::unique_ptr<GVMaterializer> M = std::move(Materializer);
return M->materializeModule();
}
std::error_code Module::materializeMetadata() {
if (!Materializer)
return std::error_code();
return Materializer->materializeMetadata();
}
std::vector<StructType *> Module::getIdentifiedStructTypes() const {
if (Materializer)
return Materializer->getIdentifiedStructTypes();
std::vector<StructType *> Ret;
TypeFinder SrcStructTypes;
SrcStructTypes.run(*this, true);
Ret.assign(SrcStructTypes.begin(), SrcStructTypes.end());
return Ret;
}
void Module::dropAllReferences() {
for (Function &F : *this)
F.dropAllReferences();
for (GlobalVariable &GV : globals())
GV.dropAllReferences();
for (GlobalAlias &GA : aliases())
GA.dropAllReferences();
}
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();
}
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::Default;
return static_cast<PICLevel::Level>(
cast<ConstantInt>(Val->getValue())->getZExtValue());
}
void Module::setPICLevel(PICLevel::Level PL) {
addModuleFlag(ModFlagBehavior::Error, "PIC Level", PL);
}
void Module::setMaximumFunctionCount(uint64_t Count) {
addModuleFlag(ModFlagBehavior::Error, "MaxFunctionCount", Count);
}
Optional<uint64_t> Module::getMaximumFunctionCount() {
auto *Val =
cast_or_null<ConstantAsMetadata>(getModuleFlag("MaxFunctionCount"));
if (!Val)
return None;
return cast<ConstantInt>(Val->getValue())->getZExtValue();
}
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;
}