InstructionsTest.cpp

//===- llvm/unittest/IR/InstructionsTest.cpp - Instructions unit tests ----===//
//
//                     The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//

#include "llvm/IR/Instructions.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/Analysis/ValueTracking.h"
#include "llvm/IR/BasicBlock.h"
#include "llvm/IR/Constants.h"
#include "llvm/IR/DataLayout.h"
#include "llvm/IR/DerivedTypes.h"
#include "llvm/IR/Function.h"
#include "llvm/IR/IRBuilder.h"
#include "llvm/IR/LLVMContext.h"
#include "llvm/IR/MDBuilder.h"
#include "llvm/IR/Module.h"
#include "llvm/IR/Operator.h"
#include "gtest/gtest.h"
#include <memory>

namespace llvm {
namespace {

TEST(InstructionsTest, ReturnInst) {
  LLVMContext &C(getGlobalContext());

  // test for PR6589
  const ReturnInst* r0 = ReturnInst::Create(C);
  EXPECT_EQ(r0->getNumOperands(), 0U);
  EXPECT_EQ(r0->op_begin(), r0->op_end());

  IntegerType* Int1 = IntegerType::get(C, 1);
  Constant* One = ConstantInt::get(Int1, 1, true);
  const ReturnInst* r1 = ReturnInst::Create(C, One);
  EXPECT_EQ(1U, r1->getNumOperands());
  User::const_op_iterator b(r1->op_begin());
  EXPECT_NE(r1->op_end(), b);
  EXPECT_EQ(One, *b);
  EXPECT_EQ(One, r1->getOperand(0));
  ++b;
  EXPECT_EQ(r1->op_end(), b);

  // clean up
  delete r0;
  delete r1;
}

// Test fixture that provides a module and a single function within it. Useful
// for tests that need to refer to the function in some way.
class ModuleWithFunctionTest : public testing::Test {
protected:
  ModuleWithFunctionTest() : M(new Module("MyModule", Ctx)) {
	FArgTypes.push_back(Type::getInt8Ty(Ctx));
	FArgTypes.push_back(Type::getInt32Ty(Ctx));
	FArgTypes.push_back(Type::getInt64Ty(Ctx));
    FunctionType *FTy =
        FunctionType::get(Type::getVoidTy(Ctx), FArgTypes, false);
    F = Function::Create(FTy, Function::ExternalLinkage, "", M.get());
  }

  LLVMContext Ctx;
  std::unique_ptr<Module> M;
  SmallVector<Type *, 3> FArgTypes;
  Function *F;
};