//===- 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/Constant.h"
-#include "ValueMapper.h"
+#include "llvm/IR/Constant.h"
+#include "llvm/IR/DerivedTypes.h"
+#include "llvm/IR/Module.h"
+#include "llvm/Transforms/Utils/ValueMapper.h"
+#include "llvm-c/Core.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;
+ ValueToValueMapTy VMap;
+ return CloneModule(M, VMap);
+}
+Module *llvm::CloneModule(const Module *M, ValueToValueMapTy &VMap) {
+ // 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());
+
// 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
+ // new module. Here we add them to the VMap 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, false, 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(),
+ I->isConstant(), I->getLinkage(),
+ (Constant*) nullptr, I->getName(),
+ (GlobalVariable*) nullptr,
+ I->getThreadLocalMode(),
+ I->getType()->getAddressSpace());
+ GV->copyAttributesFrom(I);
+ VMap[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()),
- false, 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()),
+ I->getLinkage(), I->getName(), New);
+ NF->copyAttributesFrom(I);
+ VMap[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) {
+ auto *PTy = cast<PointerType>(I->getType());
+ auto *GA =
+ GlobalAlias::create(PTy->getElementType(), PTy->getAddressSpace(),
+ I->getLinkage(), I->getName(), New);
+ GA->copyAttributesFrom(I);
+ VMap[I] = GA;
+ }
+
// 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) {
- GlobalVariable *GV = cast<GlobalVariable>(ValueMap[I]);
+ for (Module::const_global_iterator I = M->global_begin(), E = M->global_end();
+ I != E; ++I) {
+ GlobalVariable *GV = cast<GlobalVariable>(VMap[I]);
if (I->hasInitializer())
- GV->setInitializer(cast<Constant>(MapValue(I->getInitializer(),
- ValueMap)));
- if (I->hasInternalLinkage())
- GV->setInternalLinkage(true);
+ GV->setInitializer(MapValue(I->getInitializer(), VMap));
}
// 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) {
+ Function *F = cast<Function>(VMap[I]);
+ 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++;
+ VMap[J] = DestI++;
}
- std::vector<ReturnInst*> Returns; // Ignore returns cloned...
- CloneFunctionInto(F, I, ValueMap, Returns);
+ SmallVector<ReturnInst*, 8> Returns; // Ignore returns cloned.
+ CloneFunctionInto(F, I, VMap, /*ModuleLevelChanges=*/true, Returns);
}
+ }
- if (I->hasInternalLinkage())
- F->setInternalLinkage(true);
+ // And aliases
+ for (Module::const_alias_iterator I = M->alias_begin(), E = M->alias_end();
+ I != E; ++I) {
+ GlobalAlias *GA = cast<GlobalAlias>(VMap[I]);
+ if (const Constant *C = I->getAliasee())
+ GA->setAliasee(MapValue(C, VMap));
+ }
+
+ // And named metadata....
+ for (Module::const_named_metadata_iterator I = M->named_metadata_begin(),
+ E = M->named_metadata_end(); I != E; ++I) {
+ const NamedMDNode &NMD = *I;
+ NamedMDNode *NewNMD = New->getOrInsertNamedMetadata(NMD.getName());
+ for (unsigned i = 0, e = NMD.getNumOperands(); i != e; ++i)
+ NewNMD->addOperand(MapMetadata(NMD.getOperand(i), VMap));
}
return New;
}
+
+extern "C" {
+
+LLVMModuleRef LLVMCloneModule(LLVMModuleRef M) {
+ return wrap(CloneModule(unwrap(M)));
+}
+
+}
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