+#include "llvm/ExecutionEngine/Orc/CloneSubModule.h"
+#include "llvm/IR/Function.h"
+#include "llvm/IR/GlobalVariable.h"
+#include "llvm/IR/Module.h"
+#include "llvm/Transforms/Utils/Cloning.h"
+
+namespace llvm {
+namespace orc {
+
+void copyGVInitializer(GlobalVariable &New, const GlobalVariable &Orig,
+ ValueToValueMapTy &VMap) {
+ if (Orig.hasInitializer())
+ New.setInitializer(MapValue(Orig.getInitializer(), VMap));
+}
+
+void copyFunctionBody(Function &New, const Function &Orig,
+ ValueToValueMapTy &VMap) {
+ if (!Orig.isDeclaration()) {
+ Function::arg_iterator DestI = New.arg_begin();
+ for (Function::const_arg_iterator J = Orig.arg_begin(); J != Orig.arg_end();
+ ++J) {
+ DestI->setName(J->getName());
+ VMap[J] = DestI++;
+ }
+
+ SmallVector<ReturnInst *, 8> Returns; // Ignore returns cloned.
+ CloneFunctionInto(&New, &Orig, VMap, /*ModuleLevelChanges=*/true, Returns);
+ }
+}
+
+void CloneSubModule(llvm::Module &Dst, const Module &Src,
+ HandleGlobalVariableFtor HandleGlobalVariable,
+ HandleFunctionFtor HandleFunction, bool CloneInlineAsm) {
+
+ ValueToValueMapTy VMap;
+
+ if (CloneInlineAsm)
+ Dst.appendModuleInlineAsm(Src.getModuleInlineAsm());
+
+ // Copy global variables (but not initializers, yet).
+ for (Module::const_global_iterator I = Src.global_begin(), E = Src.global_end();
+ I != E; ++I) {
+ GlobalVariable *GV = new GlobalVariable(
+ Dst, 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 = Src.begin(), E = Src.end(); I != E; ++I) {
+ Function *NF =
+ Function::Create(cast<FunctionType>(I->getType()->getElementType()),
+ I->getLinkage(), I->getName(), &Dst);
+ NF->copyAttributesFrom(I);
+ VMap[I] = NF;
+ }
+
+ // Loop over the aliases in the module
+ for (Module::const_alias_iterator I = Src.alias_begin(), E = Src.alias_end();
+ I != E; ++I) {
+ auto *PTy = cast<PointerType>(I->getType());
+ auto *GA = GlobalAlias::create(PTy, I->getLinkage(), I->getName(), &Dst);
+ 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 = Src.global_begin(), E = Src.global_end();
+ I != E; ++I) {
+ GlobalVariable &GV = *cast<GlobalVariable>(VMap[I]);
+ HandleGlobalVariable(GV, *I, VMap);
+ }
+
+ // Similarly, copy over function bodies now...
+ //
+ for (Module::const_iterator I = Src.begin(), E = Src.end(); I != E; ++I) {
+ Function &F = *cast<Function>(VMap[I]);
+ HandleFunction(F, *I, VMap);
+ }
+
+ // And aliases
+ for (Module::const_alias_iterator I = Src.alias_begin(), E = Src.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 = Src.named_metadata_begin(),
+ E = Src.named_metadata_end();
+ I != E; ++I) {
+ const NamedMDNode &NMD = *I;
+ NamedMDNode *NewNMD = Dst.getOrInsertNamedMetadata(NMD.getName());
+ for (unsigned i = 0, e = NMD.getNumOperands(); i != e; ++i)
+ NewNMD->addOperand(MapMetadata(NMD.getOperand(i), VMap));
+ }
+
+}
+
+} // End namespace orc.
+} // End namespace llvm.