1 //===- llvm/unittest/IR/VerifierTest.cpp - Verifier unit tests ------------===//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9
10 #include "llvm/IR/Verifier.h"
11 #include "llvm/IR/Constants.h"
12 #include "llvm/IR/DerivedTypes.h"
13 #include "llvm/IR/Function.h"
14 #include "llvm/IR/GlobalAlias.h"
15 #include "llvm/IR/GlobalVariable.h"
16 #include "llvm/IR/Instructions.h"
17 #include "llvm/IR/LLVMContext.h"
18 #include "llvm/IR/Module.h"
19 #include "gtest/gtest.h"
20
21 namespace llvm {
22 namespace {
23
TEST(VerifierTest,Branch_i1)24 TEST(VerifierTest, Branch_i1) {
25 LLVMContext &C = getGlobalContext();
26 Module M("M", C);
27 FunctionType *FTy = FunctionType::get(Type::getVoidTy(C), /*isVarArg=*/false);
28 Function *F = cast<Function>(M.getOrInsertFunction("foo", FTy));
29 BasicBlock *Entry = BasicBlock::Create(C, "entry", F);
30 BasicBlock *Exit = BasicBlock::Create(C, "exit", F);
31 ReturnInst::Create(C, Exit);
32
33 // To avoid triggering an assertion in BranchInst::Create, we first create
34 // a branch with an 'i1' condition ...
35
36 Constant *False = ConstantInt::getFalse(C);
37 BranchInst *BI = BranchInst::Create(Exit, Exit, False, Entry);
38
39 // ... then use setOperand to redirect it to a value of different type.
40
41 Constant *Zero32 = ConstantInt::get(IntegerType::get(C, 32), 0);
42 BI->setOperand(0, Zero32);
43
44 EXPECT_TRUE(verifyFunction(*F));
45 }
46
TEST(VerifierTest,InvalidRetAttribute)47 TEST(VerifierTest, InvalidRetAttribute) {
48 LLVMContext &C = getGlobalContext();
49 Module M("M", C);
50 FunctionType *FTy = FunctionType::get(Type::getInt32Ty(C), /*isVarArg=*/false);
51 Function *F = cast<Function>(M.getOrInsertFunction("foo", FTy));
52 AttributeSet AS = F->getAttributes();
53 F->setAttributes(AS.addAttribute(C, AttributeSet::ReturnIndex,
54 Attribute::UWTable));
55
56 std::string Error;
57 raw_string_ostream ErrorOS(Error);
58 EXPECT_TRUE(verifyModule(M, &ErrorOS));
59 EXPECT_TRUE(StringRef(ErrorOS.str()).startswith(
60 "Attribute 'uwtable' only applies to functions!"));
61 }
62
TEST(VerifierTest,CrossModuleRef)63 TEST(VerifierTest, CrossModuleRef) {
64 LLVMContext &C = getGlobalContext();
65 Module M1("M1", C);
66 Module M2("M2", C);
67 Module M3("M2", C);
68 FunctionType *FTy = FunctionType::get(Type::getInt32Ty(C), /*isVarArg=*/false);
69 Function *F1 = cast<Function>(M1.getOrInsertFunction("foo1", FTy));
70 Function *F2 = cast<Function>(M2.getOrInsertFunction("foo2", FTy));
71 Function *F3 = cast<Function>(M3.getOrInsertFunction("foo3", FTy));
72
73 BasicBlock *Entry1 = BasicBlock::Create(C, "entry", F1);
74 BasicBlock *Entry3 = BasicBlock::Create(C, "entry", F3);
75
76 // BAD: Referencing function in another module
77 CallInst::Create(F2,"call",Entry1);
78
79 // BAD: Referencing personality routine in another module
80 F3->setPersonalityFn(F2);
81
82 // Fill in the body
83 Constant *ConstZero = ConstantInt::get(Type::getInt32Ty(C), 0);
84 ReturnInst::Create(C, ConstZero, Entry1);
85 ReturnInst::Create(C, ConstZero, Entry3);
86
87 std::string Error;
88 raw_string_ostream ErrorOS(Error);
89 EXPECT_FALSE(verifyModule(M2, &ErrorOS));
90 EXPECT_TRUE(verifyModule(M1, &ErrorOS));
91 EXPECT_TRUE(StringRef(ErrorOS.str()).equals(
92 "Referencing function in another module!\n"
93 " %call = call i32 @foo2()\n"
94 "; ModuleID = 'M1'\n"
95 "i32 ()* @foo2\n"
96 "; ModuleID = 'M2'\n"));
97
98 Error.clear();
99 EXPECT_TRUE(verifyModule(M3, &ErrorOS));
100 EXPECT_TRUE(StringRef(ErrorOS.str()).startswith(
101 "Referencing personality function in another module!"));
102
103 // Erase bad methods to avoid triggering an assertion failure on destruction
104 F1->eraseFromParent();
105 F3->eraseFromParent();
106 }
107
108
109
110 }
111 }
112