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
21namespace llvm {
22namespace {
23
24TEST(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
47TEST(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
63TEST(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