//
//===----------------------------------------------------------------------===//
-#include "llvm/Linker/Linker.h"
+#include "llvm/AsmParser/Parser.h"
#include "llvm/IR/BasicBlock.h"
#include "llvm/IR/DataLayout.h"
#include "llvm/IR/Function.h"
#include "llvm/IR/IRBuilder.h"
#include "llvm/IR/Module.h"
+#include "llvm/Linker/Linker.h"
+#include "llvm/Support/SourceMgr.h"
+#include "llvm-c/Linker.h"
#include "gtest/gtest.h"
using namespace llvm;
class LinkModuleTest : public testing::Test {
protected:
- virtual void SetUp() {
- LLVMContext &Ctx = getGlobalContext();
+ void SetUp() override {
M.reset(new Module("MyModule", Ctx));
- FunctionType *FTy = FunctionType::get(Type::getInt8PtrTy(Ctx),
- Type::getInt32Ty(Ctx),
- false /*=isVarArg*/);
+ FunctionType *FTy = FunctionType::get(
+ Type::getInt8PtrTy(Ctx), Type::getInt32Ty(Ctx), false /*=isVarArg*/);
F = Function::Create(FTy, Function::ExternalLinkage, "ba_func", M.get());
F->setCallingConv(CallingConv::C);
SwitchCase2BB = BasicBlock::Create(Ctx, "switch.case.2", F);
ExitBB = BasicBlock::Create(Ctx, "exit", F);
- ArrayType *AT = ArrayType::get(Type::getInt8PtrTy(Ctx), 3);
+ AT = ArrayType::get(Type::getInt8PtrTy(Ctx), 3);
GV = new GlobalVariable(*M.get(), AT, false /*=isConstant*/,
- GlobalValue::InternalLinkage,
- 0, "switch.bas");
-
+ GlobalValue::InternalLinkage, nullptr,"switch.bas");
// Global Initializer
- std::vector<Constant*> Init;
+ std::vector<Constant *> Init;
Constant *SwitchCase1BA = BlockAddress::get(SwitchCase1BB);
Init.push_back(SwitchCase1BA);
Init.push_back(SwitchCase2BA);
ConstantInt *One = ConstantInt::get(Type::getInt32Ty(Ctx), 1);
- Constant *OnePtr = ConstantExpr::getCast(Instruction::IntToPtr,
- One, Type::getInt8PtrTy(Ctx));
+ Constant *OnePtr = ConstantExpr::getCast(Instruction::IntToPtr, One,
+ Type::getInt8PtrTy(Ctx));
Init.push_back(OnePtr);
GV->setInitializer(ConstantArray::get(AT, Init));
}
- virtual void TearDown() {
- M.reset();
- }
+ void TearDown() override { M.reset(); }
- OwningPtr<Module> M;
+ LLVMContext Ctx;
+ std::unique_ptr<Module> M;
Function *F;
+ ArrayType *AT;
GlobalVariable *GV;
BasicBlock *EntryBB;
BasicBlock *SwitchCase1BB;
};
TEST_F(LinkModuleTest, BlockAddress) {
- LLVMContext &Ctx = getGlobalContext();
IRBuilder<> Builder(EntryBB);
- std::vector<Value*> GEPIndices;
+ std::vector<Value *> GEPIndices;
GEPIndices.push_back(ConstantInt::get(Type::getInt32Ty(Ctx), 0));
GEPIndices.push_back(F->arg_begin());
- Value *GEP = Builder.CreateGEP(GV, GEPIndices, "switch.gep");
+ Value *GEP = Builder.CreateGEP(AT, GV, GEPIndices, "switch.gep");
Value *Load = Builder.CreateLoad(GEP, "switch.load");
Builder.CreateRet(Load);
Builder.SetInsertPoint(ExitBB);
Builder.CreateRet(ConstantPointerNull::get(Type::getInt8PtrTy(Ctx)));
- Module *LinkedModule = new Module("MyModuleLinked", getGlobalContext());
- Linker::LinkModules(LinkedModule, M.get(), Linker::PreserveSource, 0);
+ Module *LinkedModule = new Module("MyModuleLinked", Ctx);
+ Linker::LinkModules(LinkedModule, M.get());
// Delete the original module.
M.reset();
LinkedModule->getFunction("ba_func"));
EXPECT_EQ(cast<BlockAddress>(Elem)->getBasicBlock()->getParent(),
LinkedModule->getFunction("ba_func"));
-
+
Elem = Init->getOperand(1);
ASSERT_TRUE(isa<BlockAddress>(Elem));
EXPECT_EQ(cast<BlockAddress>(Elem)->getFunction(),
delete LinkedModule;
}
-TEST_F(LinkModuleTest, EmptyModule) {
- LLVMContext &Ctx = getGlobalContext();
+static Module *getExternal(LLVMContext &Ctx, StringRef FuncName) {
+ // Create a module with an empty externally-linked function
+ Module *M = new Module("ExternalModule", Ctx);
+ FunctionType *FTy = FunctionType::get(
+ Type::getVoidTy(Ctx), Type::getInt8PtrTy(Ctx), false /*=isVarArgs*/);
+
+ Function *F =
+ Function::Create(FTy, Function::ExternalLinkage, FuncName, M);
+ F->setCallingConv(CallingConv::C);
+
+ BasicBlock *BB = BasicBlock::Create(Ctx, "", F);
+ IRBuilder<> Builder(BB);
+ Builder.CreateRetVoid();
+ return M;
+}
+
+static Module *getInternal(LLVMContext &Ctx) {
Module *InternalM = new Module("InternalModule", Ctx);
- FunctionType *FTy = FunctionType::get(Type::getVoidTy(Ctx),
- Type::getInt8PtrTy(Ctx),
- false /*=isVarArgs*/);
+ FunctionType *FTy = FunctionType::get(
+ Type::getVoidTy(Ctx), Type::getInt8PtrTy(Ctx), false /*=isVarArgs*/);
- F = Function::Create(FTy, Function::InternalLinkage, "bar", InternalM);
+ Function *F =
+ Function::Create(FTy, Function::InternalLinkage, "bar", InternalM);
F->setCallingConv(CallingConv::C);
BasicBlock *BB = BasicBlock::Create(Ctx, "", F);
StructType *STy = StructType::create(Ctx, PointerType::get(FTy, 0));
GlobalVariable *GV =
- new GlobalVariable(*InternalM, STy, false /*=isConstant*/,
- GlobalValue::InternalLinkage, 0, "g");
+ new GlobalVariable(*InternalM, STy, false /*=isConstant*/,
+ GlobalValue::InternalLinkage, nullptr, "g");
GV->setInitializer(ConstantStruct::get(STy, F));
+ return InternalM;
+}
+
+TEST_F(LinkModuleTest, EmptyModule) {
+ std::unique_ptr<Module> InternalM(getInternal(Ctx));
+ std::unique_ptr<Module> EmptyM(new Module("EmptyModule1", Ctx));
+ Linker::LinkModules(EmptyM.get(), InternalM.get());
+}
+
+TEST_F(LinkModuleTest, EmptyModule2) {
+ std::unique_ptr<Module> InternalM(getInternal(Ctx));
+ std::unique_ptr<Module> EmptyM(new Module("EmptyModule1", Ctx));
+ Linker::LinkModules(InternalM.get(), EmptyM.get());
+}
+
+TEST_F(LinkModuleTest, TypeMerge) {
+ LLVMContext C;
+ SMDiagnostic Err;
+
+ const char *M1Str = "%t = type {i32}\n"
+ "@t1 = weak global %t zeroinitializer\n";
+ std::unique_ptr<Module> M1 = parseAssemblyString(M1Str, Err, C);
+ const char *M2Str = "%t = type {i32}\n"
+ "@t2 = weak global %t zeroinitializer\n";
+ std::unique_ptr<Module> M2 = parseAssemblyString(M2Str, Err, C);
- Module *EmptyM = new Module("EmptyModule1", Ctx);
- Linker::LinkModules(EmptyM, InternalM, Linker::PreserveSource, 0);
+ Linker::LinkModules(M1.get(), M2.get(), [](const llvm::DiagnosticInfo &){});
- delete EmptyM;
- EmptyM = new Module("EmptyModule2", Ctx);
- Linker::LinkModules(InternalM, EmptyM, Linker::PreserveSource, 0);
+ EXPECT_EQ(M1->getNamedGlobal("t1")->getType(),
+ M1->getNamedGlobal("t2")->getType());
+}
+
+TEST_F(LinkModuleTest, CAPISuccess) {
+ std::unique_ptr<Module> DestM(getExternal(Ctx, "foo"));
+ std::unique_ptr<Module> SourceM(getExternal(Ctx, "bar"));
+ char *errout = nullptr;
+ LLVMBool result = LLVMLinkModules(wrap(DestM.get()), wrap(SourceM.get()),
+ LLVMLinkerDestroySource, &errout);
+ EXPECT_EQ(0, result);
+ EXPECT_EQ(nullptr, errout);
+ // "bar" is present in destination module
+ EXPECT_NE(nullptr, DestM->getFunction("bar"));
+}
- delete EmptyM;
- delete InternalM;
+TEST_F(LinkModuleTest, CAPIFailure) {
+ // Symbol clash between two modules
+ std::unique_ptr<Module> DestM(getExternal(Ctx, "foo"));
+ std::unique_ptr<Module> SourceM(getExternal(Ctx, "foo"));
+ char *errout = nullptr;
+ LLVMBool result = LLVMLinkModules(wrap(DestM.get()), wrap(SourceM.get()),
+ LLVMLinkerDestroySource, &errout);
+ EXPECT_EQ(1, result);
+ EXPECT_STREQ("Linking globals named 'foo': symbol multiply defined!", errout);
+ std::free(errout);
}
} // end anonymous namespace
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