//===-- Module.cpp - Implement the Module class ---------------------------===//
-//
+//
// The LLVM Compiler Infrastructure
//
-// This file was developed by the LLVM research group and is distributed under
-// the University of Illinois Open Source License. See LICENSE.TXT for details.
-//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
//===----------------------------------------------------------------------===//
//
// This file implements the Module class for the VMCore library.
#include "llvm/InstrTypes.h"
#include "llvm/Constants.h"
#include "llvm/DerivedTypes.h"
-#include "Support/STLExtras.h"
-#include "Support/LeakDetector.h"
+#include "llvm/GVMaterializer.h"
+#include "llvm/LLVMContext.h"
+#include "llvm/ADT/DenseSet.h"
+#include "llvm/ADT/SmallString.h"
+#include "llvm/ADT/STLExtras.h"
+#include "llvm/ADT/StringExtras.h"
+#include "llvm/Support/LeakDetector.h"
#include "SymbolTableListTraitsImpl.h"
#include <algorithm>
#include <cstdarg>
-#include <map>
+#include <cstdlib>
using namespace llvm;
//===----------------------------------------------------------------------===//
// Methods to implement the globals and functions lists.
//
-Function *ilist_traits<Function>::createNode() {
- FunctionType *FTy =
- FunctionType::get(Type::VoidTy, std::vector<const Type*>(), false);
- Function *Ret = new Function(FTy, GlobalValue::ExternalLinkage);
- // This should not be garbage monitored.
- LeakDetector::removeGarbageObject(Ret);
- return Ret;
-}
-GlobalVariable *ilist_traits<GlobalVariable>::createNode() {
- GlobalVariable *Ret = new GlobalVariable(Type::IntTy, false,
- GlobalValue::ExternalLinkage);
- // This should not be garbage monitored.
- LeakDetector::removeGarbageObject(Ret);
- return Ret;
-}
-
-iplist<Function> &ilist_traits<Function>::getList(Module *M) {
- return M->getFunctionList();
-}
-iplist<GlobalVariable> &ilist_traits<GlobalVariable>::getList(Module *M) {
- return M->getGlobalList();
-}
-
// Explicit instantiations of SymbolTableListTraits since some of the methods
-// are not in the public header file...
-template class SymbolTableListTraits<GlobalVariable, Module, Module>;
-template class SymbolTableListTraits<Function, Module, Module>;
-
-// Define the GlobalValueRefMap as a struct that wraps a map so that we don't
-// have Module.h depend on <map>
-//
-namespace llvm {
- struct GlobalValueRefMap {
- typedef std::map<GlobalValue*, ConstantPointerRef*> MapTy;
- typedef MapTy::iterator iterator;
- std::map<GlobalValue*, ConstantPointerRef*> Map;
- };
-}
+// are not in the public header file.
+template class llvm::SymbolTableListTraits<Function, Module>;
+template class llvm::SymbolTableListTraits<GlobalVariable, Module>;
+template class llvm::SymbolTableListTraits<GlobalAlias, Module>;
//===----------------------------------------------------------------------===//
// Primitive Module methods.
//
-Module::Module(const std::string &MID)
- : ModuleID(MID), Endian(AnyEndianness), PtrSize(AnyPointerSize) {
- FunctionList.setItemParent(this);
- FunctionList.setParent(this);
- GlobalList.setItemParent(this);
- GlobalList.setParent(this);
- GVRefMap = 0;
- SymTab = new SymbolTable();
+Module::Module(StringRef MID, LLVMContext& C)
+ : Context(C), Materializer(NULL), ModuleID(MID) {
+ ValSymTab = new ValueSymbolTable();
+ NamedMDSymTab = new StringMap<NamedMDNode *>();
+ Context.addModule(this);
}
Module::~Module() {
+ Context.removeModule(this);
dropAllReferences();
GlobalList.clear();
- GlobalList.setParent(0);
FunctionList.clear();
- FunctionList.setParent(0);
- delete SymTab;
+ AliasList.clear();
+ LibraryList.clear();
+ NamedMDList.clear();
+ delete ValSymTab;
+ delete static_cast<StringMap<NamedMDNode *> *>(NamedMDSymTab);
+}
+
+/// Target endian information.
+Module::Endianness Module::getEndianness() const {
+ StringRef temp = DataLayout;
+ Module::Endianness ret = AnyEndianness;
+
+ while (!temp.empty()) {
+ std::pair<StringRef, StringRef> P = getToken(temp, "-");
+
+ StringRef token = P.first;
+ temp = P.second;
+
+ if (token[0] == 'e') {
+ ret = LittleEndian;
+ } else if (token[0] == 'E') {
+ ret = BigEndian;
+ }
+ }
+
+ return ret;
+}
+
+/// Target Pointer Size information.
+Module::PointerSize Module::getPointerSize() const {
+ StringRef temp = DataLayout;
+ Module::PointerSize ret = AnyPointerSize;
+
+ 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;
}
-// Module::dump() - Allow printing from debugger
-void Module::dump() const {
- print(std::cerr);
+/// 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);
+}
+
+
//===----------------------------------------------------------------------===//
// Methods for easy access to the functions in the module.
//
// it. This is nice because it allows most passes to get away with not handling
// the symbol table directly for this common task.
//
-Function *Module::getOrInsertFunction(const std::string &Name,
- const FunctionType *Ty) {
- SymbolTable &SymTab = getSymbolTable();
-
- // See if we have a definitions for the specified function already...
- if (Value *V = SymTab.lookup(PointerType::get(Ty), Name)) {
- return cast<Function>(V); // Yup, got it
- } else { // Nope, add one
- Function *New = new Function(Ty, GlobalVariable::ExternalLinkage, Name);
+Constant *Module::getOrInsertFunction(StringRef Name,
+ FunctionType *Ty,
+ AttrListPtr AttributeList) {
+ // See if we have a definition for the specified function already.
+ GlobalValue *F = getNamedValue(Name);
+ if (F == 0) {
+ // Nope, add it
+ Function *New = Function::Create(Ty, GlobalVariable::ExternalLinkage, Name);
+ if (!New->isIntrinsic()) // Intrinsics get attrs set on construction
+ New->setAttributes(AttributeList);
FunctionList.push_back(New);
- return New; // Return the new prototype...
+ 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))
+ return ConstantExpr::getBitCast(F, PointerType::getUnqual(Ty));
+
+ // Otherwise, we just found the existing function or a prototype.
+ return F;
+}
+
+Constant *Module::getOrInsertTargetIntrinsic(StringRef Name,
+ FunctionType *Ty,
+ AttrListPtr AttributeList) {
+ // See if we have a definition for the specified function already.
+ GlobalValue *F = getNamedValue(Name);
+ if (F == 0) {
+ // Nope, add it
+ Function *New = Function::Create(Ty, GlobalVariable::ExternalLinkage, Name);
+ New->setAttributes(AttributeList);
+ FunctionList.push_back(New);
+ return New; // Return the new prototype.
+ }
+
+ // Otherwise, we just found the existing function or a prototype.
+ return F;
+}
+
+Constant *Module::getOrInsertFunction(StringRef Name,
+ FunctionType *Ty) {
+ AttrListPtr AttributeList = AttrListPtr::get((AttributeWithIndex *)0, 0);
+ return getOrInsertFunction(Name, Ty, AttributeList);
}
// getOrInsertFunction - Look up the specified function in the module symbol
// This version of the method takes a null terminated list of function
// arguments, which makes it easier for clients to use.
//
-Function *Module::getOrInsertFunction(const std::string &Name,
- const Type *RetTy, ...) {
+Constant *Module::getOrInsertFunction(StringRef Name,
+ AttrListPtr AttributeList,
+ Type *RetTy, ...) {
va_list Args;
va_start(Args, RetTy);
// Build the list of argument types...
- std::vector<const Type*> ArgTys;
- while (const Type *ArgTy = va_arg(Args, const Type*))
+ std::vector<Type*> ArgTys;
+ while (Type *ArgTy = va_arg(Args, Type*))
ArgTys.push_back(ArgTy);
va_end(Args);
// Build the function type and chain to the other getOrInsertFunction...
- return getOrInsertFunction(Name, FunctionType::get(RetTy, ArgTys, false));
+ return getOrInsertFunction(Name,
+ FunctionType::get(RetTy, ArgTys, false),
+ AttributeList);
}
+Constant *Module::getOrInsertFunction(StringRef Name,
+ Type *RetTy, ...) {
+ va_list Args;
+ va_start(Args, RetTy);
-// getFunction - Look up the specified function in the module symbol table.
-// If it does not exist, return null.
-//
-Function *Module::getFunction(const std::string &Name, const FunctionType *Ty) {
- SymbolTable &SymTab = getSymbolTable();
- return cast_or_null<Function>(SymTab.lookup(PointerType::get(Ty), Name));
-}
-
+ // Build the list of argument types...
+ std::vector<Type*> ArgTys;
+ while (Type *ArgTy = va_arg(Args, Type*))
+ ArgTys.push_back(ArgTy);
-/// getMainFunction - This function looks up main efficiently. This is such a
-/// common case, that it is a method in Module. If main cannot be found, a
-/// null pointer is returned.
-///
-Function *Module::getMainFunction() {
- std::vector<const Type*> Params;
-
- // int main(void)...
- if (Function *F = getFunction("main", FunctionType::get(Type::IntTy,
- Params, false)))
- return F;
-
- // void main(void)...
- if (Function *F = getFunction("main", FunctionType::get(Type::VoidTy,
- Params, false)))
- return F;
-
- Params.push_back(Type::IntTy);
-
- // int main(int argc)...
- if (Function *F = getFunction("main", FunctionType::get(Type::IntTy,
- Params, false)))
- return F;
-
- // void main(int argc)...
- if (Function *F = getFunction("main", FunctionType::get(Type::VoidTy,
- Params, false)))
- return F;
-
- for (unsigned i = 0; i != 2; ++i) { // Check argv and envp
- Params.push_back(PointerType::get(PointerType::get(Type::SByteTy)));
-
- // int main(int argc, char **argv)...
- if (Function *F = getFunction("main", FunctionType::get(Type::IntTy,
- Params, false)))
- return F;
-
- // void main(int argc, char **argv)...
- if (Function *F = getFunction("main", FunctionType::get(Type::VoidTy,
- Params, false)))
- return F;
- }
+ va_end(Args);
- // Ok, try to find main the hard way...
- return getNamedFunction("main");
+ // Build the function type and chain to the other getOrInsertFunction...
+ return getOrInsertFunction(Name,
+ FunctionType::get(RetTy, ArgTys, false),
+ AttrListPtr::get((AttributeWithIndex *)0, 0));
}
-/// getNamedFunction - Return the first function in the module with the
-/// specified name, of arbitrary type. This method returns null if a function
-/// with the specified name is not found.
-///
-Function *Module::getNamedFunction(const std::string &Name) {
- // Loop over all of the functions, looking for the function desired
- Function *Found = 0;
- for (iterator I = begin(), E = end(); I != E; ++I)
- if (I->getName() == Name)
- if (I->isExternal())
- Found = I;
- else
- return I;
- return Found; // Non-external function not found...
+// 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));
}
//===----------------------------------------------------------------------===//
//
/// getGlobalVariable - Look up the specified global variable in the module
-/// symbol table. If it does not exist, return null. Note that this only
-/// returns a global variable if it does not have internal linkage. The type
-/// argument should be the underlying type of the global, ie, it should not
-/// have the top-level PointerType, which represents the address of the
-/// global.
+/// 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(const std::string &Name,
- const Type *Ty) {
- if (Value *V = getSymbolTable().lookup(PointerType::get(Ty), Name)) {
- GlobalVariable *Result = cast<GlobalVariable>(V);
- if (!Result->hasInternalLinkage())
+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 0;
}
+/// 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 delclaration, return the
+/// existing global.
+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) {
+ // Nope, add it
+ GlobalVariable *New =
+ new GlobalVariable(*this, Ty, false, GlobalVariable::ExternalLinkage,
+ 0, Name);
+ return New; // Return the new declaration.
+ }
+ // If the variable exists but has the wrong type, return a bitcast to the
+ // right type.
+ if (GV->getType() != PointerType::getUnqual(Ty))
+ return ConstantExpr::getBitCast(GV, PointerType::getUnqual(Ty));
+
+ // Otherwise, we just found the existing function or a prototype.
+ return GV;
+}
//===----------------------------------------------------------------------===//
-// Methods for easy access to the types in the module.
+// Methods for easy access to the global variables in the module.
//
-
-// addTypeName - Insert an entry in the symbol table mapping Str to Type. If
-// there is already an entry for this name, true is returned and the symbol
-// table is not modified.
+// getNamedAlias - Look up the specified global in the module symbol table.
+// If it does not exist, return null.
//
-bool Module::addTypeName(const std::string &Name, const Type *Ty) {
- SymbolTable &ST = getSymbolTable();
+GlobalAlias *Module::getNamedAlias(StringRef Name) const {
+ return dyn_cast_or_null<GlobalAlias>(getNamedValue(Name));
+}
- if (ST.lookupType(Name)) return true; // Already in symtab...
-
- // Not in symbol table? Set the name with the Symtab as an argument so the
- // type knows what to update...
- ((Value*)Ty)->setName(Name, &ST);
+/// 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);
+}
- return false;
+/// 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;
}
-/// getTypeByName - Return the type with the specified name in this module, or
-/// null if there is none by that name.
-const Type *Module::getTypeByName(const std::string &Name) const {
- const SymbolTable &ST = getSymbolTable();
- return cast_or_null<Type>(ST.lookupType(Name));
+void Module::eraseNamedMetadata(NamedMDNode *NMD) {
+ static_cast<StringMap<NamedMDNode *> *>(NamedMDSymTab)->erase(NMD->getName());
+ NamedMDList.erase(NMD);
}
-// getTypeName - If there is at least one entry in the symbol table for the
-// specified type, return it.
+
+//===----------------------------------------------------------------------===//
+// Methods to control the materialization of GlobalValues in the Module.
//
-std::string Module::getTypeName(const Type *Ty) const {
- const SymbolTable &ST = getSymbolTable();
+void Module::setMaterializer(GVMaterializer *GVM) {
+ assert(!Materializer &&
+ "Module already has a GVMaterializer. Call MaterializeAllPermanently"
+ " to clear it out before setting another one.");
+ Materializer.reset(GVM);
+}
+
+bool Module::isMaterializable(const GlobalValue *GV) const {
+ if (Materializer)
+ return Materializer->isMaterializable(GV);
+ return false;
+}
- SymbolTable::type_const_iterator TI = ST.type_begin();
- SymbolTable::type_const_iterator TE = ST.type_end();
- if ( TI == TE ) return ""; // No names for types
+bool Module::isDematerializable(const GlobalValue *GV) const {
+ if (Materializer)
+ return Materializer->isDematerializable(GV);
+ return false;
+}
- while (TI != TE && TI->second != Ty)
- ++TI;
+bool Module::Materialize(GlobalValue *GV, std::string *ErrInfo) {
+ if (Materializer)
+ return Materializer->Materialize(GV, ErrInfo);
+ return false;
+}
- if (TI != TE) // Must have found an entry!
- return TI->first;
- return ""; // Must not have found anything...
+void Module::Dematerialize(GlobalValue *GV) {
+ if (Materializer)
+ return Materializer->Dematerialize(GV);
}
+bool Module::MaterializeAll(std::string *ErrInfo) {
+ if (!Materializer)
+ return false;
+ return Materializer->MaterializeModule(this, ErrInfo);
+}
+
+bool Module::MaterializeAllPermanently(std::string *ErrInfo) {
+ if (MaterializeAll(ErrInfo))
+ return true;
+ Materializer.reset();
+ return false;
+}
//===----------------------------------------------------------------------===//
// Other module related stuff.
for(Module::iterator I = begin(), E = end(); I != E; ++I)
I->dropAllReferences();
- for(Module::giterator I = gbegin(), E = gend(); I != E; ++I)
+ for(Module::global_iterator I = global_begin(), E = global_end(); I != E; ++I)
I->dropAllReferences();
- // If there are any GlobalVariable references still out there, nuke them now.
- // Since all references are hereby dropped, nothing could possibly reference
- // them still. Note that destroying all of the constant pointer refs will
- // eventually cause the GVRefMap field to be set to null (by
- // destroyConstantPointerRef, below).
- //
- while (GVRefMap)
- // Delete the ConstantPointerRef node...
- GVRefMap->Map.begin()->second->destroyConstant();
+ for(Module::alias_iterator I = alias_begin(), E = alias_end(); I != E; ++I)
+ I->dropAllReferences();
}
-// Accessor for the underlying GlobalValRefMap...
-ConstantPointerRef *Module::getConstantPointerRef(GlobalValue *V){
- // Create ref map lazily on demand...
- if (GVRefMap == 0) GVRefMap = new GlobalValueRefMap();
-
- GlobalValueRefMap::iterator I = GVRefMap->Map.find(V);
- if (I != GVRefMap->Map.end()) return I->second;
+void Module::addLibrary(StringRef Lib) {
+ for (Module::lib_iterator I = lib_begin(), E = lib_end(); I != E; ++I)
+ if (*I == Lib)
+ return;
+ LibraryList.push_back(Lib);
+}
- ConstantPointerRef *Ref = new ConstantPointerRef(V);
- GVRefMap->Map[V] = Ref;
- return Ref;
+void Module::removeLibrary(StringRef Lib) {
+ LibraryListType::iterator I = LibraryList.begin();
+ LibraryListType::iterator E = LibraryList.end();
+ for (;I != E; ++I)
+ if (*I == Lib) {
+ LibraryList.erase(I);
+ return;
+ }
}
-void Module::destroyConstantPointerRef(ConstantPointerRef *CPR) {
- assert(GVRefMap && "No map allocated, but we have a CPR?");
- if (!GVRefMap->Map.erase(CPR->getValue())) // Remove it from the map...
- assert(0 && "ConstantPointerRef not found in module CPR map!");
-
- if (GVRefMap->Map.empty()) { // If the map is empty, delete it.
- delete GVRefMap;
- GVRefMap = 0;
- }
+//===----------------------------------------------------------------------===//
+// Type finding functionality.
+//===----------------------------------------------------------------------===//
+
+namespace {
+ /// TypeFinder - Walk over a module, identifying all of the types that are
+ /// used by the module.
+ class TypeFinder {
+ // To avoid walking constant expressions multiple times and other IR
+ // objects, we keep several helper maps.
+ DenseSet<const Value*> VisitedConstants;
+ DenseSet<Type*> VisitedTypes;
+
+ std::vector<StructType*> &StructTypes;
+ public:
+ TypeFinder(std::vector<StructType*> &structTypes)
+ : StructTypes(structTypes) {}
+
+ void run(const Module &M) {
+ // Get types from global variables.
+ for (Module::const_global_iterator I = M.global_begin(),
+ E = M.global_end(); I != E; ++I) {
+ incorporateType(I->getType());
+ if (I->hasInitializer())
+ incorporateValue(I->getInitializer());
+ }
+
+ // Get types from aliases.
+ for (Module::const_alias_iterator I = M.alias_begin(),
+ E = M.alias_end(); I != E; ++I) {
+ incorporateType(I->getType());
+ if (const Value *Aliasee = I->getAliasee())
+ incorporateValue(Aliasee);
+ }
+
+ SmallVector<std::pair<unsigned, MDNode*>, 4> MDForInst;
+
+ // Get types from functions.
+ for (Module::const_iterator FI = M.begin(), E = M.end(); FI != E; ++FI) {
+ incorporateType(FI->getType());
+
+ for (Function::const_iterator BB = FI->begin(), E = FI->end();
+ BB != E;++BB)
+ for (BasicBlock::const_iterator II = BB->begin(),
+ E = BB->end(); II != E; ++II) {
+ const Instruction &I = *II;
+ // Incorporate the type of the instruction and all its operands.
+ incorporateType(I.getType());
+ for (User::const_op_iterator OI = I.op_begin(), OE = I.op_end();
+ OI != OE; ++OI)
+ incorporateValue(*OI);
+
+ // Incorporate types hiding in metadata.
+ I.getAllMetadataOtherThanDebugLoc(MDForInst);
+ for (unsigned i = 0, e = MDForInst.size(); i != e; ++i)
+ incorporateMDNode(MDForInst[i].second);
+ MDForInst.clear();
+ }
+ }
+
+ for (Module::const_named_metadata_iterator I = M.named_metadata_begin(),
+ E = M.named_metadata_end(); I != E; ++I) {
+ const NamedMDNode *NMD = I;
+ for (unsigned i = 0, e = NMD->getNumOperands(); i != e; ++i)
+ incorporateMDNode(NMD->getOperand(i));
+ }
+ }
+
+ private:
+ void incorporateType(Type *Ty) {
+ // Check to see if we're already visited this type.
+ if (!VisitedTypes.insert(Ty).second)
+ return;
+
+ // If this is a structure or opaque type, add a name for the type.
+ if (StructType *STy = dyn_cast<StructType>(Ty))
+ StructTypes.push_back(STy);
+
+ // Recursively walk all contained types.
+ for (Type::subtype_iterator I = Ty->subtype_begin(),
+ E = Ty->subtype_end(); I != E; ++I)
+ incorporateType(*I);
+ }
+
+ /// incorporateValue - This method is used to walk operand lists finding
+ /// types hiding in constant expressions and other operands that won't be
+ /// walked in other ways. GlobalValues, basic blocks, instructions, and
+ /// inst operands are all explicitly enumerated.
+ void incorporateValue(const Value *V) {
+ if (const MDNode *M = dyn_cast<MDNode>(V))
+ return incorporateMDNode(M);
+ if (!isa<Constant>(V) || isa<GlobalValue>(V)) return;
+
+ // Already visited?
+ if (!VisitedConstants.insert(V).second)
+ return;
+
+ // Check this type.
+ incorporateType(V->getType());
+
+ // Look in operands for types.
+ const User *U = cast<User>(V);
+ for (Constant::const_op_iterator I = U->op_begin(),
+ E = U->op_end(); I != E;++I)
+ incorporateValue(*I);
+ }
+
+ void incorporateMDNode(const MDNode *V) {
+
+ // Already visited?
+ if (!VisitedConstants.insert(V).second)
+ return;
+
+ // Look in operands for types.
+ for (unsigned i = 0, e = V->getNumOperands(); i != e; ++i)
+ if (Value *Op = V->getOperand(i))
+ incorporateValue(Op);
+ }
+ };
+} // end anonymous namespace
+
+void Module::findUsedStructTypes(std::vector<StructType*> &StructTypes) const {
+ TypeFinder(StructTypes).run(*this);
}
projects / oota-llvm.git / blobdiff