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132 lines
4.2 KiB
C++
132 lines
4.2 KiB
C++
//===- llvm/unittest/Linker/LinkModulesTest.cpp - IRBuilder tests ---------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/Linker.h"
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#include "llvm/IR/IRBuilder.h"
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#include "llvm/IR/BasicBlock.h"
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#include "llvm/IR/DataLayout.h"
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#include "llvm/IR/Function.h"
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#include "llvm/IR/Module.h"
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#include "gtest/gtest.h"
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using namespace llvm;
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namespace {
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class LinkModuleTest : public testing::Test {
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protected:
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virtual void SetUp() {
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LLVMContext &Ctx = getGlobalContext();
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M.reset(new Module("MyModule", Ctx));
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FunctionType *FTy = FunctionType::get(Type::getInt8PtrTy(Ctx),
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Type::getInt32Ty(Ctx),
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false /*=isVarArg*/);
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F = Function::Create(FTy, Function::ExternalLinkage, "ba_func", M.get());
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F->setCallingConv(CallingConv::C);
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EntryBB = BasicBlock::Create(Ctx, "entry", F);
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SwitchCase1BB = BasicBlock::Create(Ctx, "switch.case.1", F);
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SwitchCase2BB = BasicBlock::Create(Ctx, "switch.case.2", F);
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ExitBB = BasicBlock::Create(Ctx, "exit", F);
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ArrayType *AT = ArrayType::get(Type::getInt8PtrTy(Ctx), 3);
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GV = new GlobalVariable(*M.get(), AT, false /*=isConstant*/,
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GlobalValue::InternalLinkage,
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0, "switch.bas");
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// Global Initializer
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std::vector<Constant*> Init;
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Constant *SwitchCase1BA = BlockAddress::get(SwitchCase1BB);
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Init.push_back(SwitchCase1BA);
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Constant *SwitchCase2BA = BlockAddress::get(SwitchCase2BB);
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Init.push_back(SwitchCase2BA);
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ConstantInt *One = ConstantInt::get(Type::getInt32Ty(Ctx), 1);
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Constant *OnePtr = ConstantExpr::getCast(Instruction::IntToPtr,
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One, Type::getInt8PtrTy(Ctx));
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Init.push_back(OnePtr);
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GV->setInitializer(ConstantArray::get(AT, Init));
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}
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virtual void TearDown() {
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M.reset();
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}
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OwningPtr<Module> M;
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Function *F;
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GlobalVariable *GV;
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BasicBlock *EntryBB;
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BasicBlock *SwitchCase1BB;
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BasicBlock *SwitchCase2BB;
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BasicBlock *ExitBB;
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};
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TEST_F(LinkModuleTest, BlockAddress) {
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LLVMContext &Ctx = getGlobalContext();
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IRBuilder<> Builder(EntryBB);
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std::vector<Value*> GEPIndices;
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GEPIndices.push_back(ConstantInt::get(Type::getInt32Ty(Ctx), 0));
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GEPIndices.push_back(F->arg_begin());
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Value *GEP = Builder.CreateGEP(GV, GEPIndices, "switch.gep");
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Value *Load = Builder.CreateLoad(GEP, "switch.load");
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Builder.CreateRet(Load);
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Builder.SetInsertPoint(SwitchCase1BB);
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Builder.CreateBr(ExitBB);
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Builder.SetInsertPoint(SwitchCase2BB);
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Builder.CreateBr(ExitBB);
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Builder.SetInsertPoint(ExitBB);
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Builder.CreateRet(ConstantPointerNull::get(Type::getInt8PtrTy(Ctx)));
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Module *LinkedModule = new Module("MyModuleLinked", getGlobalContext());
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Linker::LinkModules(LinkedModule, M.get(), Linker::PreserveSource, 0);
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// Delete the original module.
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M.reset();
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// Check that the global "@switch.bas" is well-formed.
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const GlobalVariable *LinkedGV = LinkedModule->getNamedGlobal("switch.bas");
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const Constant *Init = LinkedGV->getInitializer();
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// @switch.bas = internal global [3 x i8*]
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// [i8* blockaddress(@ba_func, %switch.case.1),
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// i8* blockaddress(@ba_func, %switch.case.2),
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// i8* inttoptr (i32 1 to i8*)]
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ArrayType *AT = ArrayType::get(Type::getInt8PtrTy(Ctx), 3);
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EXPECT_EQ(AT, Init->getType());
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Value *Elem = Init->getOperand(0);
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ASSERT_TRUE(isa<BlockAddress>(Elem));
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EXPECT_EQ(cast<BlockAddress>(Elem)->getFunction(),
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LinkedModule->getFunction("ba_func"));
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EXPECT_EQ(cast<BlockAddress>(Elem)->getBasicBlock()->getParent(),
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LinkedModule->getFunction("ba_func"));
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Elem = Init->getOperand(1);
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ASSERT_TRUE(isa<BlockAddress>(Elem));
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EXPECT_EQ(cast<BlockAddress>(Elem)->getFunction(),
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LinkedModule->getFunction("ba_func"));
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EXPECT_EQ(cast<BlockAddress>(Elem)->getBasicBlock()->getParent(),
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LinkedModule->getFunction("ba_func"));
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delete LinkedModule;
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}
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} // end anonymous namespace
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