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//===- llvm/unittest/VMCore/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/Instructions.h"
#include "llvm/BasicBlock.h"
#include "llvm/DerivedTypes.h"
#include "llvm/LLVMContext.h"
#include "llvm/ADT/STLExtras.h"
#include "gtest/gtest.h"
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());
const IntegerType* Int1 = IntegerType::get(C, 1);
Constant* One = ConstantInt::get(Int1, 1, true);
const ReturnInst* r1 = ReturnInst::Create(C, One);
EXPECT_EQ(r1->getNumOperands(), 1U);
User::const_op_iterator b(r1->op_begin());
EXPECT_NE(b, r1->op_end());
EXPECT_EQ(*b, One);
EXPECT_EQ(r1->getOperand(0), One);
++b;
EXPECT_EQ(b, r1->op_end());
// clean up
delete r0;
delete r1;
}
TEST(InstructionsTest, BranchInst) {
LLVMContext &C(getGlobalContext());
// Make a BasicBlocks
BasicBlock* bb0 = BasicBlock::Create(C);
BasicBlock* bb1 = BasicBlock::Create(C);
// Mandatory BranchInst
const BranchInst* b0 = BranchInst::Create(bb0);
EXPECT_TRUE(b0->isUnconditional());
EXPECT_FALSE(b0->isConditional());
EXPECT_EQ(b0->getNumSuccessors(), 1U);
// check num operands
EXPECT_EQ(b0->getNumOperands(), 1U);
EXPECT_NE(b0->op_begin(), b0->op_end());
EXPECT_EQ(b0->op_begin() + 1, b0->op_end());
EXPECT_EQ(next(b0->op_begin()), b0->op_end());
const IntegerType* Int1 = IntegerType::get(C, 1);
Constant* One = ConstantInt::get(Int1, 1, true);
// Conditional BranchInst
BranchInst* b1 = BranchInst::Create(bb0, bb1, One);
EXPECT_FALSE(b1->isUnconditional());
EXPECT_TRUE(b1->isConditional());
EXPECT_EQ(b1->getNumSuccessors(), 2U);
// check num operands
EXPECT_EQ(b1->getNumOperands(), 3U);
User::const_op_iterator b(b1->op_begin());
// check COND
EXPECT_NE(b, b1->op_end());
EXPECT_EQ(*b, One);
EXPECT_EQ(b1->getOperand(0), One);
EXPECT_EQ(b1->getCondition(), One);
++b;
// check ELSE
EXPECT_EQ(*b, bb1);
EXPECT_EQ(b1->getOperand(1), bb1);
EXPECT_EQ(b1->getSuccessor(1), bb1);
++b;
// check THEN
EXPECT_EQ(*b, bb0);
EXPECT_EQ(b1->getOperand(2), bb0);
EXPECT_EQ(b1->getSuccessor(0), bb0);
++b;
EXPECT_EQ(b, b1->op_end());
// shrink it
b1->setUnconditionalDest(bb1);
// check num operands
EXPECT_EQ(b1->getNumOperands(), 1U);
User::const_op_iterator c(b1->op_begin());
EXPECT_NE(c, b1->op_end());
// check THEN
EXPECT_EQ(*c, bb1);
EXPECT_EQ(b1->getOperand(0), bb1);
EXPECT_EQ(b1->getSuccessor(0), bb1);
++c;
EXPECT_EQ(c, b1->op_end());
// clean up
delete b0;
delete b1;
delete bb0;
delete bb1;
}
} // end anonymous namespace
} // end namespace llvm
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