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 VMap and to the new Module. We
// don't worry about attributes or initializers, they will come later.
//
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*) 0, I->getName(),
(GlobalVariable*) 0,
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) {
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) {
GlobalAlias *GA = new GlobalAlias(I->getType(), I->getLinkage(),
I->getName(), NULL, 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_global_iterator I = M->global_begin(), E = M->global_end();
I != E; ++I) {
GlobalVariable *GV = cast<GlobalVariable>(VMap[I]);
if (I->hasInitializer())
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>(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());
VMap[J] = DestI++;
}
SmallVector<ReturnInst*, 8> Returns; // Ignore returns cloned.
CloneFunctionInto(F, I, VMap, /*ModuleLevelChanges=*/true, Returns);
}
}
// 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(MapValue(NMD.getOperand(i), VMap));
}
return New;
}
void
link(llvm::Module *krn, const llvm::Module *lib)
{
assert(krn);
assert(lib);
ValueToValueMapTy vvm;
std::list<llvm::StringRef> declared;
// Inspect the kernel, find undefined functions
llvm::Module::iterator fi,fe;
for (fi=krn->begin(), fe=krn->end();
fi != fe;
fi++) {
if ((*fi).isDeclaration()) {
DB_PRINT("%s is not defined\n", fi->getName().data());
declared.push_back(fi->getName());
continue;
}
// Find all functions the kernel source calls
// TODO: is there no direct way?
find_called_functions(fi, declared);
}
declared.sort(stringref_cmp);
declared.unique(stringref_equal);
// copy all the globals from lib to krn.
// it probably is faster to just copy them all, than to inspect
// both krn and lib to find which actually are used.
DB_PRINT("cloning the global variables:\n");
llvm::Module::const_global_iterator gi,ge;
for (gi=lib->global_begin(), ge=lib->global_end();
gi != ge;
gi++) {
DB_PRINT(" %s\n", gi->getName().data());
GlobalVariable *GV=new GlobalVariable(*krn,
gi->getType()->getElementType(),
gi->isConstant(),
gi->getLinkage(),
(Constant*) 0, gi->getName(),
(GlobalVariable*) 0,
gi->getThreadLocalMode(),
gi->getType()->getAddressSpace());
GV->copyAttributesFrom(gi);
vvm[gi]=GV;
}
// For each undefined function in krn, clone it from the lib to the krn module,
// if found in lib
std::list<llvm::StringRef>::iterator di,de;
for (di=declared.begin(), de=declared.end();
di != de;
di++) {
copy_func_callgraph( *di, lib, krn, vvm);
}
// copy any aliases to krn
DB_PRINT("cloning the aliases:\n");
llvm::Module::const_alias_iterator ai, ae;
for (ai = lib->alias_begin(), ae = lib->alias_end();
ai != ae;
ai++) {
DB_PRINT(" %s\n", ai->getName().data());
GlobalAlias *GA =
#if (defined LLVM_3_2 || defined LLVM_3_3 || defined LLVM_3_4)
new GlobalAlias(ai->getType(), ai->getLinkage(),
ai->getName(), NULL, krn);
#elif (defined LLVM_OLDER_THAN_3_7)
GlobalAlias::create(ai->getType(),
ai->getType()->getAddressSpace(),
ai->getLinkage(), ai->getName(), NULL, krn);
#else
GlobalAlias::create(ai->getType(),
ai->getLinkage(), ai->getName(), NULL, krn);
#endif
GA->copyAttributesFrom(ai);
vvm[ai]=GA;
}
// initialize the globals that were copied
for (gi=lib->global_begin(), ge=lib->global_end();
gi != ge;
gi++) {
GlobalVariable *GV=cast<GlobalVariable>(vvm[gi]);
if (gi->hasInitializer())
GV->setInitializer(MapValue(gi->getInitializer(), vvm));
}
// copy metadata
DB_PRINT("cloning metadata:\n");
llvm::Module::const_named_metadata_iterator mi,me;
for (mi=lib->named_metadata_begin(), me=lib->named_metadata_end();
mi != me;
mi++) {
const NamedMDNode &NMD=*mi;
DB_PRINT(" %s:\n", NMD.getName().data());
NamedMDNode *NewNMD=krn->getOrInsertNamedMetadata(NMD.getName());
for (unsigned i=0, e=NMD.getNumOperands(); i != e; ++i)
#ifdef LLVM_OLDER_THAN_3_6
NewNMD->addOperand(MapValue(NMD.getOperand(i), vvm));
#else
NewNMD->addOperand(MapMetadata(NMD.getOperand(i), vvm));
#endif
}
}