#include "llvm/ADT/STLExtras.h"
#include "llvm/ADT/SmallString.h"
#include "llvm/ADT/StringExtras.h"
-#include "llvm/GVMaterializer.h"
#include "llvm/IR/Constants.h"
#include "llvm/IR/DerivedTypes.h"
+#include "llvm/IR/GVMaterializer.h"
#include "llvm/IR/InstrTypes.h"
#include "llvm/IR/LLVMContext.h"
-#include "llvm/Support/LeakDetector.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>
// Primitive Module methods.
//
-Module::Module(StringRef MID, LLVMContext& C)
- : Context(C), Materializer(NULL), ModuleID(MID) {
+Module::Module(StringRef MID, LLVMContext &C)
+ : Context(C), Materializer(), ModuleID(MID), DL("") {
ValSymTab = new ValueSymbolTable();
NamedMDSymTab = new StringMap<NamedMDNode *>();
Context.addModule(this);
delete static_cast<StringMap<NamedMDNode *> *>(NamedMDSymTab);
}
-/// Target endian information.
-Module::Endianness Module::getEndianness() const {
- StringRef temp = DataLayout;
- Module::Endianness ret = BigEndian;
+RandomNumberGenerator *Module::createRNG(const Pass* P) const {
+ SmallString<32> Salt(P->getPassName());
- while (!temp.empty()) {
- std::pair<StringRef, StringRef> P = getToken(temp, "-");
+ // 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());
- StringRef token = P.first;
- temp = P.second;
-
- if (token[0] == 'e') {
- ret = LittleEndian;
- } else if (token[0] == 'E') {
- ret = BigEndian;
- }
- }
-
- return ret;
+ return new RandomNumberGenerator(Salt);
}
-/// Target Pointer Size information.
-Module::PointerSize Module::getPointerSize() const {
- StringRef temp = DataLayout;
- Module::PointerSize ret = Pointer64;
-
- while (!temp.empty()) {
- std::pair<StringRef, StringRef> TmpP = getToken(temp, "-");
- temp = TmpP.second;
- TmpP = getToken(TmpP.first, ":");
- StringRef token = TmpP.second, signalToken = TmpP.first;
-
- if (signalToken[0] == 'p') {
- int size = 0;
- getToken(token, ":").first.getAsInteger(10, size);
- if (size == 32)
- ret = Pointer32;
- else if (size == 64)
- ret = Pointer64;
- }
- }
-
- return ret;
-}
/// getNamedValue - Return the first global value in the module with
/// the specified name, of arbitrary type. This method returns null
AttributeSet AttributeList) {
// See if we have a definition for the specified function already.
GlobalValue *F = getNamedValue(Name);
- if (F == 0) {
+ if (!F) {
// Nope, add it
Function *New = Function::Create(Ty, GlobalVariable::ExternalLinkage, Name);
if (!New->isIntrinsic()) // Intrinsics get attrs set on construction
return New; // Return the new prototype.
}
- // Okay, the function exists. Does it have externally visible linkage?
- if (F->hasLocalLinkage()) {
- // Clear the function's name.
- F->setName("");
- // Retry, now there won't be a conflict.
- Constant *NewF = getOrInsertFunction(Name, Ty);
- F->setName(Name);
- return NewF;
- }
-
// If the function exists but has the wrong type, return a bitcast to the
// right type.
if (F->getType() != PointerType::getUnqual(Ty))
dyn_cast_or_null<GlobalVariable>(getNamedValue(Name)))
if (AllowLocal || !Result->hasLocalLinkage())
return Result;
- return 0;
+ return nullptr;
}
/// getOrInsertGlobal - Look up the specified global in the module symbol table.
Constant *Module::getOrInsertGlobal(StringRef Name, Type *Ty) {
// See if we have a definition for the specified global already.
GlobalVariable *GV = dyn_cast_or_null<GlobalVariable>(getNamedValue(Name));
- if (GV == 0) {
+ if (!GV) {
// Nope, add it
GlobalVariable *New =
new GlobalVariable(*this, Ty, false, GlobalVariable::ExternalLinkage,
- 0, Name);
+ nullptr, Name);
return New; // Return the new declaration.
}
NamedMDList.erase(NMD);
}
+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 (unsigned i = 0, e = ModFlags->getNumOperands(); i != e; ++i) {
- MDNode *Flag = ModFlags->getOperand(i);
- if (Flag->getNumOperands() >= 3 && isa<ConstantInt>(Flag->getOperand(0)) &&
- isa<MDString>(Flag->getOperand(1))) {
+ 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.
- ConstantInt *Behavior = cast<ConstantInt>(Flag->getOperand(0));
MDString *Key = cast<MDString>(Flag->getOperand(1));
- Value *Val = Flag->getOperand(2);
- Flags.push_back(ModuleFlagEntry(ModFlagBehavior(Behavior->getZExtValue()),
- Key, Val));
+ 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.
-Value *Module::getModuleFlag(StringRef Key) const {
+Metadata *Module::getModuleFlag(StringRef Key) const {
SmallVector<Module::ModuleFlagEntry, 8> ModuleFlags;
getModuleFlagsMetadata(ModuleFlags);
- for (unsigned I = 0, E = ModuleFlags.size(); I < E; ++I) {
- const ModuleFlagEntry &MFE = ModuleFlags[I];
+ for (const ModuleFlagEntry &MFE : ModuleFlags) {
if (Key == MFE.Key->getString())
return MFE.Val;
}
- return 0;
+ return nullptr;
}
/// getModuleFlagsMetadata - Returns the NamedMDNode in the module that
/// metadata. It will create the module-level flags named metadata if it doesn't
/// already exist.
void Module::addModuleFlag(ModFlagBehavior Behavior, StringRef Key,
- Value *Val) {
+ Metadata *Val) {
Type *Int32Ty = Type::getInt32Ty(Context);
- Value *Ops[3] = {
- ConstantInt::get(Int32Ty, Behavior), MDString::get(Context, Key), Val
- };
+ 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);
void Module::addModuleFlag(MDNode *Node) {
assert(Node->getNumOperands() == 3 &&
"Invalid number of operands for module flag!");
- assert(isa<ConstantInt>(Node->getOperand(0)) &&
+ 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; }
+
//===----------------------------------------------------------------------===//
// Methods to control the materialization of GlobalValues in the Module.
//
Materializer.reset(GVM);
}
-bool Module::isMaterializable(const GlobalValue *GV) const {
- if (Materializer)
- return Materializer->isMaterializable(GV);
- return false;
-}
-
bool Module::isDematerializable(const GlobalValue *GV) const {
if (Materializer)
return Materializer->isDematerializable(GV);
return false;
}
-bool Module::Materialize(GlobalValue *GV, std::string *ErrInfo) {
+std::error_code Module::materialize(GlobalValue *GV) {
if (!Materializer)
- return false;
+ return std::error_code();
- error_code EC = Materializer->Materialize(GV);
- if (!EC)
- return false;
- if (ErrInfo)
- *ErrInfo = EC.message();
- return true;
+ return Materializer->materialize(GV);
}
-void Module::Dematerialize(GlobalValue *GV) {
+void Module::dematerialize(GlobalValue *GV) {
if (Materializer)
- return Materializer->Dematerialize(GV);
+ return Materializer->dematerialize(GV);
}
-bool Module::MaterializeAll(std::string *ErrInfo) {
+std::error_code Module::materializeAll() {
if (!Materializer)
- return false;
- error_code EC = Materializer->MaterializeModule(this);
- if (!EC)
- return false;
- if (ErrInfo)
- *ErrInfo = EC.message();
- return true;
-}
-
-bool Module::MaterializeAllPermanently(std::string *ErrInfo) {
- if (MaterializeAll(ErrInfo))
- return true;
+ return std::error_code();
+ return Materializer->materializeModule(this);
+}
+
+std::error_code Module::materializeAllPermanently() {
+ if (std::error_code EC = materializeAll())
+ return EC;
+
Materializer.reset();
- return false;
+ return std::error_code();
+}
+
+std::error_code Module::materializeMetadata() {
+ if (!Materializer)
+ return std::error_code();
+ 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
// has "dropped all references", except operator delete.
//
void Module::dropAllReferences() {
- for(Module::iterator I = begin(), E = end(); I != E; ++I)
- I->dropAllReferences();
+ for (Function &F : *this)
+ F.dropAllReferences();
- for(Module::global_iterator I = global_begin(), E = global_end(); I != E; ++I)
- I->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 == NULL)
+ return PICLevel::Default;
+
+ return static_cast<PICLevel::Level>(
+ cast<ConstantInt>(Val->getValue())->getZExtValue());
+}
- for(Module::alias_iterator I = alias_begin(), E = alias_end(); I != E; ++I)
- I->dropAllReferences();
+void Module::setPICLevel(PICLevel::Level PL) {
+ addModuleFlag(ModFlagBehavior::Error, "PIC Level", PL);
}
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