1 //===- llvm/unittest/IR/VerifierTest.cpp - Verifier unit tests --*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 #include "llvm/IR/Verifier.h"
11 #include "llvm/IR/Constants.h"
12 #include "llvm/IR/DIBuilder.h"
13 #include "llvm/IR/DerivedTypes.h"
14 #include "llvm/IR/Function.h"
15 #include "llvm/IR/GlobalAlias.h"
16 #include "llvm/IR/GlobalVariable.h"
17 #include "llvm/IR/IRBuilder.h"
18 #include "llvm/IR/Instructions.h"
19 #include "llvm/IR/LLVMContext.h"
20 #include "llvm/IR/Module.h"
21 #include "gtest/gtest.h"
26 TEST(VerifierTest, Branch_i1) {
29 FunctionType *FTy = FunctionType::get(Type::getVoidTy(C), /*isVarArg=*/false);
30 Function *F = cast<Function>(M.getOrInsertFunction("foo", FTy));
31 BasicBlock *Entry = BasicBlock::Create(C, "entry", F);
32 BasicBlock *Exit = BasicBlock::Create(C, "exit", F);
33 ReturnInst::Create(C, Exit);
35 // To avoid triggering an assertion in BranchInst::Create, we first create
36 // a branch with an 'i1' condition ...
38 Constant *False = ConstantInt::getFalse(C);
39 BranchInst *BI = BranchInst::Create(Exit, Exit, False, Entry);
41 // ... then use setOperand to redirect it to a value of different type.
43 Constant *Zero32 = ConstantInt::get(IntegerType::get(C, 32), 0);
44 BI->setOperand(0, Zero32);
46 EXPECT_TRUE(verifyFunction(*F));
49 TEST(VerifierTest, InvalidRetAttribute) {
52 FunctionType *FTy = FunctionType::get(Type::getInt32Ty(C), /*isVarArg=*/false);
53 Function *F = cast<Function>(M.getOrInsertFunction("foo", FTy));
54 AttributeList AS = F->getAttributes();
56 AS.addAttribute(C, AttributeList::ReturnIndex, Attribute::UWTable));
59 raw_string_ostream ErrorOS(Error);
60 EXPECT_TRUE(verifyModule(M, &ErrorOS));
61 EXPECT_TRUE(StringRef(ErrorOS.str()).startswith(
62 "Attribute 'uwtable' only applies to functions!"));
65 TEST(VerifierTest, CrossModuleRef) {
70 FunctionType *FTy = FunctionType::get(Type::getInt32Ty(C), /*isVarArg=*/false);
71 Function *F1 = cast<Function>(M1.getOrInsertFunction("foo1", FTy));
72 Function *F2 = cast<Function>(M2.getOrInsertFunction("foo2", FTy));
73 Function *F3 = cast<Function>(M3.getOrInsertFunction("foo3", FTy));
75 BasicBlock *Entry1 = BasicBlock::Create(C, "entry", F1);
76 BasicBlock *Entry3 = BasicBlock::Create(C, "entry", F3);
78 // BAD: Referencing function in another module
79 CallInst::Create(F2,"call",Entry1);
81 // BAD: Referencing personality routine in another module
82 F3->setPersonalityFn(F2);
85 Constant *ConstZero = ConstantInt::get(Type::getInt32Ty(C), 0);
86 ReturnInst::Create(C, ConstZero, Entry1);
87 ReturnInst::Create(C, ConstZero, Entry3);
90 raw_string_ostream ErrorOS(Error);
91 EXPECT_TRUE(verifyModule(M2, &ErrorOS));
92 EXPECT_TRUE(StringRef(ErrorOS.str())
93 .equals("Global is used by function in a different module\n"
98 "Global is referenced in a different module!\n"
100 "; ModuleID = 'M2'\n"
101 " %call = call i32 @foo2()\n"
103 "; ModuleID = 'M1'\n"));
106 EXPECT_TRUE(verifyModule(M1, &ErrorOS));
107 EXPECT_TRUE(StringRef(ErrorOS.str()).equals(
108 "Referencing function in another module!\n"
109 " %call = call i32 @foo2()\n"
110 "; ModuleID = 'M1'\n"
112 "; ModuleID = 'M2'\n"));
115 EXPECT_TRUE(verifyModule(M3, &ErrorOS));
116 EXPECT_TRUE(StringRef(ErrorOS.str()).startswith(
117 "Referencing personality function in another module!"));
119 // Erase bad methods to avoid triggering an assertion failure on destruction
120 F1->eraseFromParent();
121 F3->eraseFromParent();
124 TEST(VerifierTest, InvalidVariableLinkage) {
127 new GlobalVariable(M, Type::getInt8Ty(C), false,
128 GlobalValue::LinkOnceODRLinkage, nullptr, "Some Global");
130 raw_string_ostream ErrorOS(Error);
131 EXPECT_TRUE(verifyModule(M, &ErrorOS));
133 StringRef(ErrorOS.str()).startswith("Global is external, but doesn't "
134 "have external or weak linkage!"));
137 TEST(VerifierTest, InvalidFunctionLinkage) {
141 FunctionType *FTy = FunctionType::get(Type::getVoidTy(C), /*isVarArg=*/false);
142 Function::Create(FTy, GlobalValue::LinkOnceODRLinkage, "foo", &M);
144 raw_string_ostream ErrorOS(Error);
145 EXPECT_TRUE(verifyModule(M, &ErrorOS));
147 StringRef(ErrorOS.str()).startswith("Global is external, but doesn't "
148 "have external or weak linkage!"));
151 TEST(VerifierTest, DetectInvalidDebugInfo) {
156 DIB.createCompileUnit(dwarf::DW_LANG_C89, DIB.createFile("broken.c", "/"),
157 "unittest", false, "", 0);
159 EXPECT_FALSE(verifyModule(M));
161 // Now break it by inserting non-CU node to the list of CUs.
162 auto *File = DIB.createFile("not-a-CU.f", ".");
163 NamedMDNode *NMD = M.getOrInsertNamedMetadata("llvm.dbg.cu");
164 NMD->addOperand(File);
165 EXPECT_TRUE(verifyModule(M));
171 auto *CU = DIB.createCompileUnit(dwarf::DW_LANG_C89,
172 DIB.createFile("broken.c", "/"),
173 "unittest", false, "", 0);
174 new GlobalVariable(M, Type::getInt8Ty(C), false,
175 GlobalValue::ExternalLinkage, nullptr, "g");
177 auto *F = cast<Function>(M.getOrInsertFunction(
178 "f", FunctionType::get(Type::getVoidTy(C), false)));
179 IRBuilder<> Builder(BasicBlock::Create(C, "", F));
180 Builder.CreateUnreachable();
181 F->setSubprogram(DIB.createFunction(CU, "f", "f",
182 DIB.createFile("broken.c", "/"), 1,
183 nullptr, true, true, 1));
185 EXPECT_FALSE(verifyModule(M));
187 // Now break it by not listing the CU at all.
188 M.eraseNamedMetadata(M.getOrInsertNamedMetadata("llvm.dbg.cu"));
189 EXPECT_TRUE(verifyModule(M));
193 } // end anonymous namespace
194 } // end namespace llvm