//
//===----------------------------------------------------------------------===//
-#include "llvm/Linker.h"
-#include "llvm/IR/IRBuilder.h"
+#include "llvm/ADT/STLExtras.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*/);
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;
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;
BasicBlock *ExitBB;
};
+static void expectNoDiags(const DiagnosticInfo &DI, void *C) {
+ EXPECT_TRUE(false);
+}
+
TEST_F(LinkModuleTest, BlockAddress) {
- LLVMContext &Ctx = getGlobalContext();
IRBuilder<> Builder(EntryBB);
std::vector<Value *> GEPIndices;
GEPIndices.push_back(ConstantInt::get(Type::getInt32Ty(Ctx), 0));
- GEPIndices.push_back(F->arg_begin());
+ 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);
+ Ctx.setDiagnosticHandler(expectNoDiags);
+ Linker::linkModules(*LinkedModule, *M);
// Delete the original module.
M.reset();
delete LinkedModule;
}
+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*/);
+
+ Function *F =
+ Function::Create(FTy, Function::InternalLinkage, "bar", InternalM);
+ F->setCallingConv(CallingConv::C);
+
+ BasicBlock *BB = BasicBlock::Create(Ctx, "", F);
+ IRBuilder<> Builder(BB);
+ Builder.CreateRetVoid();
+
+ StructType *STy = StructType::create(Ctx, PointerType::get(FTy, 0));
+
+ GlobalVariable *GV =
+ 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));
+ Ctx.setDiagnosticHandler(expectNoDiags);
+ Linker::linkModules(*EmptyM, *InternalM);
+}
+
+TEST_F(LinkModuleTest, EmptyModule2) {
+ std::unique_ptr<Module> InternalM(getInternal(Ctx));
+ std::unique_ptr<Module> EmptyM(new Module("EmptyModule1", Ctx));
+ Ctx.setDiagnosticHandler(expectNoDiags);
+ Linker::linkModules(*InternalM, *EmptyM);
+}
+
+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);
+
+ Ctx.setDiagnosticHandler(expectNoDiags);
+ Linker::linkModules(*M1, *M2);
+
+ 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"));
+}
+
+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);
+ LLVMDisposeMessage(errout);
+}
+
+TEST_F(LinkModuleTest, MoveDistinctMDs) {
+ LLVMContext C;
+ SMDiagnostic Err;
+
+ const char *SrcStr = "define void @foo() !attach !0 {\n"
+ "entry:\n"
+ " call void @llvm.md(metadata !1)\n"
+ " ret void, !attach !2\n"
+ "}\n"
+ "declare void @llvm.md(metadata)\n"
+ "!named = !{!3, !4}\n"
+ "!0 = distinct !{}\n"
+ "!1 = distinct !{}\n"
+ "!2 = distinct !{}\n"
+ "!3 = distinct !{}\n"
+ "!4 = !{!3}\n";
+
+ std::unique_ptr<Module> Src = parseAssemblyString(SrcStr, Err, C);
+ assert(Src);
+ ASSERT_TRUE(Src.get());
+
+ // Get the addresses of the Metadata before merging.
+ Function *F = &*Src->begin();
+ ASSERT_EQ("foo", F->getName());
+ BasicBlock *BB = &F->getEntryBlock();
+ auto *CI = cast<CallInst>(&BB->front());
+ auto *RI = cast<ReturnInst>(BB->getTerminator());
+ NamedMDNode *NMD = &*Src->named_metadata_begin();
+
+ MDNode *M0 = F->getMetadata("attach");
+ MDNode *M1 =
+ cast<MDNode>(cast<MetadataAsValue>(CI->getArgOperand(0))->getMetadata());
+ MDNode *M2 = RI->getMetadata("attach");
+ MDNode *M3 = NMD->getOperand(0);
+ MDNode *M4 = NMD->getOperand(1);
+
+ // Confirm a few things about the IR.
+ EXPECT_TRUE(M0->isDistinct());
+ EXPECT_TRUE(M1->isDistinct());
+ EXPECT_TRUE(M2->isDistinct());
+ EXPECT_TRUE(M3->isDistinct());
+ EXPECT_TRUE(M4->isUniqued());
+ EXPECT_EQ(M3, M4->getOperand(0));
+
+ // Link into destination module.
+ auto Dst = llvm::make_unique<Module>("Linked", C);
+ ASSERT_TRUE(Dst.get());
+ Ctx.setDiagnosticHandler(expectNoDiags);
+ Linker::linkModules(*Dst, *Src);
+
+ // Check that distinct metadata was moved, not cloned. Even !4, the uniqued
+ // node, should effectively be moved, since its only operand hasn't changed.
+ F = &*Dst->begin();
+ BB = &F->getEntryBlock();
+ CI = cast<CallInst>(&BB->front());
+ RI = cast<ReturnInst>(BB->getTerminator());
+ NMD = &*Dst->named_metadata_begin();
+
+ EXPECT_EQ(M0, F->getMetadata("attach"));
+ EXPECT_EQ(M1, cast<MetadataAsValue>(CI->getArgOperand(0))->getMetadata());
+ EXPECT_EQ(M2, RI->getMetadata("attach"));
+ EXPECT_EQ(M3, NMD->getOperand(0));
+ EXPECT_EQ(M4, NMD->getOperand(1));
+
+ // Confirm a few things about the IR. This shouldn't have changed.
+ EXPECT_TRUE(M0->isDistinct());
+ EXPECT_TRUE(M1->isDistinct());
+ EXPECT_TRUE(M2->isDistinct());
+ EXPECT_TRUE(M3->isDistinct());
+ EXPECT_TRUE(M4->isUniqued());
+ EXPECT_EQ(M3, M4->getOperand(0));
+}
+
} // end anonymous namespace
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