133 lines
4.8 KiB
C++
133 lines
4.8 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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// Test that filtering iterators work with basic blocks.
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auto isPhi = [](Instruction &I) { return isa<PHINode>(&I); };
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auto Phis = make_filter_range(*BB, isPhi);
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auto ReversedPhis = reverse(make_filter_range(*BB, isPhi));
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EXPECT_EQ(std::distance(Phis.begin(), Phis.end()), 3);
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EXPECT_EQ(&*Phis.begin(), P1);
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EXPECT_EQ(std::distance(ReversedPhis.begin(), ReversedPhis.end()), 3);
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EXPECT_EQ(&*ReversedPhis.begin(), P3);
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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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#define CHECK_ITERATORS(Range1, Range2) \
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EXPECT_EQ(std::distance(Range1.begin(), Range1.end()), \
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std::distance(Range2.begin(), Range2.end())); \
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for (auto Pair : zip(Range1, Range2)) \
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EXPECT_EQ(&std::get<0>(Pair), std::get<1>(Pair));
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TEST(BasicBlockTest, TestInstructionsWithoutDebug) {
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LLVMContext Ctx;
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Module *M = new Module("MyModule", Ctx);
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Type *ArgTy1[] = {Type::getInt32PtrTy(Ctx)};
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FunctionType *FT = FunctionType::get(Type::getVoidTy(Ctx), ArgTy1, false);
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Argument *V = new Argument(Type::getInt32Ty(Ctx));
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Function *F = Function::Create(FT, Function::ExternalLinkage, "", M);
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Value *DbgAddr = Intrinsic::getDeclaration(M, Intrinsic::dbg_addr);
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Value *DbgDeclare =
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Intrinsic::getDeclaration(M, Intrinsic::dbg_declare);
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Value *DbgValue = Intrinsic::getDeclaration(M, Intrinsic::dbg_value);
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Value *DIV = MetadataAsValue::get(Ctx, (Metadata *)nullptr);
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SmallVector<Value *, 3> Args = {DIV, DIV, DIV};
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BasicBlock *BB1 = BasicBlock::Create(Ctx, "", F);
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const BasicBlock *BBConst = BB1;
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IRBuilder<> Builder1(BB1);
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AllocaInst *Var = Builder1.CreateAlloca(Builder1.getInt8Ty());
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Builder1.CreateCall(DbgValue, Args);
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Instruction *AddInst = cast<Instruction>(Builder1.CreateAdd(V, V));
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Instruction *MulInst = cast<Instruction>(Builder1.CreateMul(AddInst, V));
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Builder1.CreateCall(DbgDeclare, Args);
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Instruction *SubInst = cast<Instruction>(Builder1.CreateSub(MulInst, V));
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Builder1.CreateCall(DbgAddr, Args);
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SmallVector<Instruction *, 4> Exp = {Var, AddInst, MulInst, SubInst};
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CHECK_ITERATORS(BB1->instructionsWithoutDebug(), Exp);
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CHECK_ITERATORS(BBConst->instructionsWithoutDebug(), Exp);
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delete M;
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delete V;
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}
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} // End anonymous namespace.
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} // End llvm namespace.
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