//===- CloneModule.cpp - Clone an entire module ---------------------------===//
//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
// This file implements the CloneModule interface which makes a copy of an
// entire module.
//
#include "llvm/Transforms/Utils/Cloning.h"
#include "llvm/Module.h"
#include "llvm/DerivedTypes.h"
+#include "llvm/TypeSymbolTable.h"
#include "llvm/Constant.h"
-#include "ValueMapper.h"
+#include "llvm/Transforms/Utils/ValueMapper.h"
+using namespace llvm;
/// CloneModule - Return an exact copy of the specified module. This is not as
/// easy as it might seem because we have to worry about making copies of global
-/// variables and functions, and making their (intializers and references,
+/// variables and functions, and making their (initializers and references,
/// respectively) refer to the right globals.
///
-Module *CloneModule(const Module *M) {
- // First off, we need to create the new module...
- Module *New = new Module();
-
+Module *llvm::CloneModule(const Module *M) {
// Create the value map that maps things from the old module over to the new
// module.
- std::map<const Value*, Value*> ValueMap;
+ DenseMap<const Value*, Value*> ValueMap;
+ return CloneModule(M, ValueMap);
+}
+
+Module *llvm::CloneModule(const Module *M,
+ DenseMap<const Value*, Value*> &ValueMap) {
+ // First off, we need to create the new module...
+ Module *New = new Module(M->getModuleIdentifier(), M->getContext());
+ New->setDataLayout(M->getDataLayout());
+ New->setTargetTriple(M->getTargetTriple());
+ New->setModuleInlineAsm(M->getModuleInlineAsm());
+
+ // Copy all of the type symbol table entries over.
+ const TypeSymbolTable &TST = M->getTypeSymbolTable();
+ for (TypeSymbolTable::const_iterator TI = TST.begin(), TE = TST.end();
+ TI != TE; ++TI)
+ New->addTypeName(TI->first, TI->second);
+
+ // Copy all of the dependent libraries over.
+ for (Module::lib_iterator I = M->lib_begin(), E = M->lib_end(); I != E; ++I)
+ New->addLibrary(*I);
// Loop over all of the global variables, making corresponding globals in the
// new module. Here we add them to the ValueMap and to the new Module. We
// don't worry about attributes or initializers, they will come later.
//
- for (Module::const_giterator I = M->gbegin(), E = M->gend(); I != E; ++I)
- ValueMap[I] = new GlobalVariable(I->getType()->getElementType(), false,
- GlobalValue::ExternalLinkage, 0,
- I->getName(), New);
+ for (Module::const_global_iterator I = M->global_begin(), E = M->global_end();
+ I != E; ++I) {
+ GlobalVariable *GV = new GlobalVariable(*New,
+ I->getType()->getElementType(),
+ false,
+ GlobalValue::ExternalLinkage, 0,
+ I->getName());
+ GV->setAlignment(I->getAlignment());
+ ValueMap[I] = GV;
+ }
// Loop over the functions in the module, making external functions as before
- for (Module::const_iterator I = M->begin(), E = M->end(); I != E; ++I)
- ValueMap[I]=new Function(cast<FunctionType>(I->getType()->getElementType()),
- GlobalValue::ExternalLinkage, I->getName(), New);
+ for (Module::const_iterator I = M->begin(), E = M->end(); I != E; ++I) {
+ Function *NF =
+ Function::Create(cast<FunctionType>(I->getType()->getElementType()),
+ GlobalValue::ExternalLinkage, I->getName(), New);
+ NF->copyAttributesFrom(I);
+ ValueMap[I] = NF;
+ }
+ // Loop over the aliases in the module
+ for (Module::const_alias_iterator I = M->alias_begin(), E = M->alias_end();
+ I != E; ++I)
+ ValueMap[I] = new GlobalAlias(I->getType(), GlobalAlias::ExternalLinkage,
+ I->getName(), NULL, New);
+
// Now that all of the things that global variable initializer can refer to
// have been created, loop through and copy the global variable referrers
// over... We also set the attributes on the global now.
//
- for (Module::const_giterator I = M->gbegin(), E = M->gend(); I != E; ++I) {
+ for (Module::const_global_iterator I = M->global_begin(), E = M->global_end();
+ I != E; ++I) {
GlobalVariable *GV = cast<GlobalVariable>(ValueMap[I]);
if (I->hasInitializer())
GV->setInitializer(cast<Constant>(MapValue(I->getInitializer(),
ValueMap)));
GV->setLinkage(I->getLinkage());
+ GV->setThreadLocal(I->isThreadLocal());
+ GV->setConstant(I->isConstant());
}
// Similarly, copy over function bodies now...
//
for (Module::const_iterator I = M->begin(), E = M->end(); I != E; ++I) {
Function *F = cast<Function>(ValueMap[I]);
- if (!I->isExternal()) {
- Function::aiterator DestI = F->abegin();
- for (Function::const_aiterator J = I->abegin(); J != I->aend(); ++J) {
+ if (!I->isDeclaration()) {
+ Function::arg_iterator DestI = F->arg_begin();
+ for (Function::const_arg_iterator J = I->arg_begin(); J != I->arg_end();
+ ++J) {
DestI->setName(J->getName());
ValueMap[J] = DestI++;
}
- std::vector<ReturnInst*> Returns; // Ignore returns cloned...
+ SmallVector<ReturnInst*, 8> Returns; // Ignore returns cloned.
CloneFunctionInto(F, I, ValueMap, Returns);
}
F->setLinkage(I->getLinkage());
}
+ // And aliases
+ for (Module::const_alias_iterator I = M->alias_begin(), E = M->alias_end();
+ I != E; ++I) {
+ GlobalAlias *GA = cast<GlobalAlias>(ValueMap[I]);
+ GA->setLinkage(I->getLinkage());
+ if (const Constant* C = I->getAliasee())
+ GA->setAliasee(cast<Constant>(MapValue(C, ValueMap)));
+ }
+
return New;
}
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