1 #include "llvm/ExecutionEngine/Orc/CloneSubModule.h"
2 #include "llvm/IR/Function.h"
3 #include "llvm/IR/GlobalVariable.h"
4 #include "llvm/IR/Module.h"
5 #include "llvm/Transforms/Utils/Cloning.h"
9 void llvm::copyGVInitializer(GlobalVariable &New, const GlobalVariable &Orig,
10 ValueToValueMapTy &VMap) {
11 if (Orig.hasInitializer())
12 New.setInitializer(MapValue(Orig.getInitializer(), VMap));
15 void llvm::copyFunctionBody(Function &New, const Function &Orig,
16 ValueToValueMapTy &VMap) {
17 if (!Orig.isDeclaration()) {
18 Function::arg_iterator DestI = New.arg_begin();
19 for (Function::const_arg_iterator J = Orig.arg_begin(); J != Orig.arg_end();
21 DestI->setName(J->getName());
25 SmallVector<ReturnInst *, 8> Returns; // Ignore returns cloned.
26 CloneFunctionInto(&New, &Orig, VMap, /*ModuleLevelChanges=*/true, Returns);
30 std::unique_ptr<Module>
31 llvm::CloneSubModule(const Module &M,
32 HandleGlobalVariableFtor HandleGlobalVariable,
33 HandleFunctionFtor HandleFunction, bool KeepInlineAsm) {
35 ValueToValueMapTy VMap;
37 // First off, we need to create the new module.
38 std::unique_ptr<Module> New =
39 llvm::make_unique<Module>(M.getModuleIdentifier(), M.getContext());
41 New->setDataLayout(M.getDataLayout());
42 New->setTargetTriple(M.getTargetTriple());
44 New->setModuleInlineAsm(M.getModuleInlineAsm());
46 // Copy global variables (but not initializers, yet).
47 for (Module::const_global_iterator I = M.global_begin(), E = M.global_end();
49 GlobalVariable *GV = new GlobalVariable(
50 *New, I->getType()->getElementType(), I->isConstant(), I->getLinkage(),
51 (Constant *)nullptr, I->getName(), (GlobalVariable *)nullptr,
52 I->getThreadLocalMode(), I->getType()->getAddressSpace());
53 GV->copyAttributesFrom(I);
57 // Loop over the functions in the module, making external functions as before
58 for (Module::const_iterator I = M.begin(), E = M.end(); I != E; ++I) {
60 Function::Create(cast<FunctionType>(I->getType()->getElementType()),
61 I->getLinkage(), I->getName(), &*New);
62 NF->copyAttributesFrom(I);
66 // Loop over the aliases in the module
67 for (Module::const_alias_iterator I = M.alias_begin(), E = M.alias_end();
69 auto *PTy = cast<PointerType>(I->getType());
71 GlobalAlias::create(PTy->getElementType(), PTy->getAddressSpace(),
72 I->getLinkage(), I->getName(), &*New);
73 GA->copyAttributesFrom(I);
77 // Now that all of the things that global variable initializer can refer to
78 // have been created, loop through and copy the global variable referrers
79 // over... We also set the attributes on the global now.
80 for (Module::const_global_iterator I = M.global_begin(), E = M.global_end();
82 GlobalVariable &GV = *cast<GlobalVariable>(VMap[I]);
83 HandleGlobalVariable(GV, *I, VMap);
86 // Similarly, copy over function bodies now...
88 for (Module::const_iterator I = M.begin(), E = M.end(); I != E; ++I) {
89 Function &F = *cast<Function>(VMap[I]);
90 HandleFunction(F, *I, VMap);
94 for (Module::const_alias_iterator I = M.alias_begin(), E = M.alias_end();
96 GlobalAlias *GA = cast<GlobalAlias>(VMap[I]);
97 if (const Constant *C = I->getAliasee())
98 GA->setAliasee(MapValue(C, VMap));
101 // And named metadata....
102 for (Module::const_named_metadata_iterator I = M.named_metadata_begin(),
103 E = M.named_metadata_end();
105 const NamedMDNode &NMD = *I;
106 NamedMDNode *NewNMD = New->getOrInsertNamedMetadata(NMD.getName());
107 for (unsigned i = 0, e = NMD.getNumOperands(); i != e; ++i)
108 NewNMD->addOperand(MapMetadata(NMD.getOperand(i), VMap));