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/ADT/OwningPtr.h"
12 #include "llvm/IR/Constants.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/Instructions.h"
18 #include "llvm/IR/LLVMContext.h"
19 #include "llvm/IR/Module.h"
20 #include "gtest/gtest.h"
21 
22 namespace llvm {
23 namespace {
24 
25 TEST(VerifierTest, Branch_i1) {
26   LLVMContext &C = getGlobalContext();
27   Module M("M", C);
28   FunctionType *FTy = FunctionType::get(Type::getVoidTy(C), /*isVarArg=*/false);
29   Function *F = cast<Function>(M.getOrInsertFunction("foo", FTy));
30   BasicBlock *Entry = BasicBlock::Create(C, "entry", F);
31   BasicBlock *Exit = BasicBlock::Create(C, "exit", F);
32   ReturnInst::Create(C, Exit);
33 
34   // To avoid triggering an assertion in BranchInst::Create, we first create
35   // a branch with an 'i1' condition ...
36 
37   Constant *False = ConstantInt::getFalse(C);
38   BranchInst *BI = BranchInst::Create(Exit, Exit, False, Entry);
39 
40   // ... then use setOperand to redirect it to a value of different type.
41 
42   Constant *Zero32 = ConstantInt::get(IntegerType::get(C, 32), 0);
43   BI->setOperand(0, Zero32);
44 
45   EXPECT_TRUE(verifyFunction(*F));
46 }
47 
48 TEST(VerifierTest, AliasUnnamedAddr) {
49   LLVMContext &C = getGlobalContext();
50   Module M("M", C);
51   Type *Ty = Type::getInt8Ty(C);
52   Constant *Init = Constant::getNullValue(Ty);
53   GlobalVariable *Aliasee = new GlobalVariable(M, Ty, true,
54                                                GlobalValue::ExternalLinkage,
55                                                Init, "foo");
56   GlobalAlias *GA = new GlobalAlias(Type::getInt8PtrTy(C),
57                                     GlobalValue::ExternalLinkage,
58                                     "bar", Aliasee, &M);
59   GA->setUnnamedAddr(true);
60   std::string Error;
61   raw_string_ostream ErrorOS(Error);
62   EXPECT_TRUE(verifyModule(M, &ErrorOS));
63   EXPECT_TRUE(
64       StringRef(ErrorOS.str()).startswith("Alias cannot have unnamed_addr"));
65 }
66 
67 TEST(VerifierTest, InvalidRetAttribute) {
68   LLVMContext &C = getGlobalContext();
69   Module M("M", C);
70   FunctionType *FTy = FunctionType::get(Type::getInt32Ty(C), /*isVarArg=*/false);
71   Function *F = cast<Function>(M.getOrInsertFunction("foo", FTy));
72   AttributeSet AS = F->getAttributes();
73   F->setAttributes(AS.addAttribute(C, AttributeSet::ReturnIndex,
74                                    Attribute::UWTable));
75 
76   std::string Error;
77   raw_string_ostream ErrorOS(Error);
78   EXPECT_TRUE(verifyModule(M, &ErrorOS));
79   EXPECT_TRUE(StringRef(ErrorOS.str()).startswith(
80       "Attribute 'uwtable' only applies to functions!"));
81 }
82 
83 }
84 }
85