243 lines
8.2 KiB
C++
243 lines
8.2 KiB
C++
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//===- llvm/unittest/IR/VerifierTest.cpp - Verifier unit tests --*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/IR/Verifier.h"
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#include "llvm/IR/Constants.h"
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#include "llvm/IR/DIBuilder.h"
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#include "llvm/IR/DerivedTypes.h"
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#include "llvm/IR/Function.h"
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#include "llvm/IR/GlobalAlias.h"
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#include "llvm/IR/GlobalVariable.h"
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#include "llvm/IR/IRBuilder.h"
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#include "llvm/IR/Instructions.h"
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#include "llvm/IR/LLVMContext.h"
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#include "llvm/IR/Module.h"
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#include "gtest/gtest.h"
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namespace llvm {
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namespace {
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TEST(VerifierTest, Branch_i1) {
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LLVMContext C;
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Module M("M", C);
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FunctionType *FTy = FunctionType::get(Type::getVoidTy(C), /*isVarArg=*/false);
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Function *F = Function::Create(FTy, Function::ExternalLinkage, "foo", M);
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BasicBlock *Entry = BasicBlock::Create(C, "entry", F);
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BasicBlock *Exit = BasicBlock::Create(C, "exit", F);
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ReturnInst::Create(C, Exit);
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// To avoid triggering an assertion in BranchInst::Create, we first create
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// a branch with an 'i1' condition ...
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Constant *False = ConstantInt::getFalse(C);
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BranchInst *BI = BranchInst::Create(Exit, Exit, False, Entry);
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// ... then use setOperand to redirect it to a value of different type.
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Constant *Zero32 = ConstantInt::get(IntegerType::get(C, 32), 0);
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BI->setOperand(0, Zero32);
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EXPECT_TRUE(verifyFunction(*F));
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}
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TEST(VerifierTest, Freeze) {
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LLVMContext C;
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Module M("M", C);
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FunctionType *FTy = FunctionType::get(Type::getVoidTy(C), /*isVarArg=*/false);
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Function *F = Function::Create(FTy, Function::ExternalLinkage, "foo", M);
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BasicBlock *Entry = BasicBlock::Create(C, "entry", F);
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ReturnInst *RI = ReturnInst::Create(C, Entry);
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IntegerType *ITy = IntegerType::get(C, 32);
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ConstantInt *CI = ConstantInt::get(ITy, 0);
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// Valid type : freeze(<2 x i32>)
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Constant *CV = ConstantVector::getSplat(ElementCount::getFixed(2), CI);
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FreezeInst *FI_vec = new FreezeInst(CV);
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FI_vec->insertBefore(RI);
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EXPECT_FALSE(verifyFunction(*F));
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FI_vec->eraseFromParent();
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// Valid type : freeze(float)
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Constant *CFP = ConstantFP::get(Type::getDoubleTy(C), 0.0);
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FreezeInst *FI_dbl = new FreezeInst(CFP);
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FI_dbl->insertBefore(RI);
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EXPECT_FALSE(verifyFunction(*F));
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FI_dbl->eraseFromParent();
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// Valid type : freeze(i32*)
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PointerType *PT = PointerType::get(ITy, 0);
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ConstantPointerNull *CPN = ConstantPointerNull::get(PT);
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FreezeInst *FI_ptr = new FreezeInst(CPN);
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FI_ptr->insertBefore(RI);
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EXPECT_FALSE(verifyFunction(*F));
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FI_ptr->eraseFromParent();
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// Valid type : freeze(int)
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FreezeInst *FI = new FreezeInst(CI);
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FI->insertBefore(RI);
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EXPECT_FALSE(verifyFunction(*F));
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FI->eraseFromParent();
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}
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TEST(VerifierTest, InvalidRetAttribute) {
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LLVMContext C;
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Module M("M", C);
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FunctionType *FTy = FunctionType::get(Type::getInt32Ty(C), /*isVarArg=*/false);
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Function *F = Function::Create(FTy, Function::ExternalLinkage, "foo", M);
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AttributeList AS = F->getAttributes();
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F->setAttributes(
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AS.addAttribute(C, AttributeList::ReturnIndex, Attribute::UWTable));
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std::string Error;
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raw_string_ostream ErrorOS(Error);
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EXPECT_TRUE(verifyModule(M, &ErrorOS));
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EXPECT_TRUE(StringRef(ErrorOS.str()).startswith(
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"Attribute 'uwtable' only applies to functions!"));
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}
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TEST(VerifierTest, CrossModuleRef) {
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LLVMContext C;
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Module M1("M1", C);
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Module M2("M2", C);
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Module M3("M3", C);
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FunctionType *FTy = FunctionType::get(Type::getInt32Ty(C), /*isVarArg=*/false);
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Function *F1 = Function::Create(FTy, Function::ExternalLinkage, "foo1", M1);
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Function *F2 = Function::Create(FTy, Function::ExternalLinkage, "foo2", M2);
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Function *F3 = Function::Create(FTy, Function::ExternalLinkage, "foo3", M3);
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BasicBlock *Entry1 = BasicBlock::Create(C, "entry", F1);
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BasicBlock *Entry3 = BasicBlock::Create(C, "entry", F3);
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// BAD: Referencing function in another module
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CallInst::Create(F2,"call",Entry1);
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// BAD: Referencing personality routine in another module
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F3->setPersonalityFn(F2);
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// Fill in the body
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Constant *ConstZero = ConstantInt::get(Type::getInt32Ty(C), 0);
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ReturnInst::Create(C, ConstZero, Entry1);
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ReturnInst::Create(C, ConstZero, Entry3);
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std::string Error;
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raw_string_ostream ErrorOS(Error);
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EXPECT_TRUE(verifyModule(M2, &ErrorOS));
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EXPECT_TRUE(StringRef(ErrorOS.str())
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.equals("Global is used by function in a different module\n"
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"i32 ()* @foo2\n"
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"; ModuleID = 'M2'\n"
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"i32 ()* @foo3\n"
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"; ModuleID = 'M3'\n"
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"Global is referenced in a different module!\n"
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"i32 ()* @foo2\n"
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"; ModuleID = 'M2'\n"
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" %call = call i32 @foo2()\n"
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"i32 ()* @foo1\n"
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"; ModuleID = 'M1'\n"));
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Error.clear();
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EXPECT_TRUE(verifyModule(M1, &ErrorOS));
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EXPECT_TRUE(StringRef(ErrorOS.str()).equals(
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"Referencing function in another module!\n"
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" %call = call i32 @foo2()\n"
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"; ModuleID = 'M1'\n"
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"i32 ()* @foo2\n"
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"; ModuleID = 'M2'\n"));
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Error.clear();
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EXPECT_TRUE(verifyModule(M3, &ErrorOS));
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EXPECT_TRUE(StringRef(ErrorOS.str()).startswith(
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"Referencing personality function in another module!"));
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// Erase bad methods to avoid triggering an assertion failure on destruction
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F1->eraseFromParent();
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F3->eraseFromParent();
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}
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TEST(VerifierTest, InvalidVariableLinkage) {
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LLVMContext C;
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Module M("M", C);
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new GlobalVariable(M, Type::getInt8Ty(C), false,
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GlobalValue::LinkOnceODRLinkage, nullptr, "Some Global");
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std::string Error;
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raw_string_ostream ErrorOS(Error);
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EXPECT_TRUE(verifyModule(M, &ErrorOS));
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EXPECT_TRUE(
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StringRef(ErrorOS.str()).startswith("Global is external, but doesn't "
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"have external or weak linkage!"));
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}
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TEST(VerifierTest, InvalidFunctionLinkage) {
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LLVMContext C;
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Module M("M", C);
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FunctionType *FTy = FunctionType::get(Type::getVoidTy(C), /*isVarArg=*/false);
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Function::Create(FTy, GlobalValue::LinkOnceODRLinkage, "foo", &M);
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std::string Error;
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raw_string_ostream ErrorOS(Error);
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EXPECT_TRUE(verifyModule(M, &ErrorOS));
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EXPECT_TRUE(
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StringRef(ErrorOS.str()).startswith("Global is external, but doesn't "
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"have external or weak linkage!"));
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}
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TEST(VerifierTest, DetectInvalidDebugInfo) {
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{
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LLVMContext C;
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Module M("M", C);
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DIBuilder DIB(M);
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DIB.createCompileUnit(dwarf::DW_LANG_C89, DIB.createFile("broken.c", "/"),
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"unittest", false, "", 0);
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DIB.finalize();
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EXPECT_FALSE(verifyModule(M));
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// Now break it by inserting non-CU node to the list of CUs.
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auto *File = DIB.createFile("not-a-CU.f", ".");
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NamedMDNode *NMD = M.getOrInsertNamedMetadata("llvm.dbg.cu");
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NMD->addOperand(File);
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EXPECT_TRUE(verifyModule(M));
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}
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{
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LLVMContext C;
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Module M("M", C);
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DIBuilder DIB(M);
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auto *CU = DIB.createCompileUnit(dwarf::DW_LANG_C89,
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DIB.createFile("broken.c", "/"),
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"unittest", false, "", 0);
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new GlobalVariable(M, Type::getInt8Ty(C), false,
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GlobalValue::ExternalLinkage, nullptr, "g");
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auto *F = Function::Create(FunctionType::get(Type::getVoidTy(C), false),
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Function::ExternalLinkage, "f", M);
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IRBuilder<> Builder(BasicBlock::Create(C, "", F));
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Builder.CreateUnreachable();
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F->setSubprogram(DIB.createFunction(
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CU, "f", "f", DIB.createFile("broken.c", "/"), 1, nullptr, 1,
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DINode::FlagZero,
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DISubprogram::SPFlagLocalToUnit | DISubprogram::SPFlagDefinition));
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DIB.finalize();
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EXPECT_FALSE(verifyModule(M));
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// Now break it by not listing the CU at all.
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M.eraseNamedMetadata(M.getOrInsertNamedMetadata("llvm.dbg.cu"));
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EXPECT_TRUE(verifyModule(M));
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}
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}
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} // end anonymous namespace
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} // end namespace llvm
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