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82 lines
2.6 KiB
C++
82 lines
2.6 KiB
C++
//===- llvm/unittest/IR/BasicBlockTest.cpp - BasicBlock unit 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/IR/BasicBlock.h"
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#include "llvm/ADT/STLExtras.h"
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#include "llvm/IR/Function.h"
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#include "llvm/IR/IRBuilder.h"
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#include "llvm/IR/LLVMContext.h"
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#include "llvm/IR/Module.h"
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#include "llvm/IR/NoFolder.h"
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#include "gmock/gmock-matchers.h"
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#include "gtest/gtest.h"
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#include <memory>
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namespace llvm {
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namespace {
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TEST(BasicBlockTest, PhiRange) {
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LLVMContext Context;
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// Create the main block.
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std::unique_ptr<BasicBlock> BB(BasicBlock::Create(Context));
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// Create some predecessors of it.
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std::unique_ptr<BasicBlock> BB1(BasicBlock::Create(Context));
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BranchInst::Create(BB.get(), BB1.get());
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std::unique_ptr<BasicBlock> BB2(BasicBlock::Create(Context));
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BranchInst::Create(BB.get(), BB2.get());
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// Make sure this doesn't crash if there are no phis.
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for (auto &PN : BB->phis()) {
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(void)PN;
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EXPECT_TRUE(false) << "empty block should have no phis";
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}
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// Make it a cycle.
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auto *BI = BranchInst::Create(BB.get(), BB.get());
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// Now insert some PHI nodes.
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auto *Int32Ty = Type::getInt32Ty(Context);
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auto *P1 = PHINode::Create(Int32Ty, /*NumReservedValues*/ 3, "phi.1", BI);
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auto *P2 = PHINode::Create(Int32Ty, /*NumReservedValues*/ 3, "phi.2", BI);
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auto *P3 = PHINode::Create(Int32Ty, /*NumReservedValues*/ 3, "phi.3", BI);
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// Some non-PHI nodes.
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auto *Sum = BinaryOperator::CreateAdd(P1, P2, "sum", BI);
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// Now wire up the incoming values that are interesting.
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P1->addIncoming(P2, BB.get());
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P2->addIncoming(P1, BB.get());
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P3->addIncoming(Sum, BB.get());
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// Finally, let's iterate them, which is the thing we're trying to test.
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// We'll use this to wire up the rest of the incoming values.
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for (auto &PN : BB->phis()) {
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PN.addIncoming(UndefValue::get(Int32Ty), BB1.get());
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PN.addIncoming(UndefValue::get(Int32Ty), BB2.get());
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}
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// Test that we can use const iterators and generally that the iterators
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// behave like iterators.
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BasicBlock::const_phi_iterator CI;
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CI = BB->phis().begin();
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EXPECT_NE(CI, BB->phis().end());
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// And iterate a const range.
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for (const auto &PN : const_cast<const BasicBlock *>(BB.get())->phis()) {
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EXPECT_EQ(BB.get(), PN.getIncomingBlock(0));
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EXPECT_EQ(BB1.get(), PN.getIncomingBlock(1));
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EXPECT_EQ(BB2.get(), PN.getIncomingBlock(2));
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}
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}
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} // End anonymous namespace.
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} // End llvm namespace.
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