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      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/Analysis/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   FunctionType *FTy = FunctionType::get(Type::getVoidTy(C), /*isVarArg=*/false);
     28   OwningPtr<Function> F(Function::Create(FTy, GlobalValue::ExternalLinkage));
     29   BasicBlock *Entry = BasicBlock::Create(C, "entry", F.get());
     30   BasicBlock *Exit = BasicBlock::Create(C, "exit", F.get());
     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, ReturnStatusAction));
     45 }
     46 
     47 TEST(VerifierTest, AliasUnnamedAddr) {
     48   LLVMContext &C = getGlobalContext();
     49   Module M("M", C);
     50   Type *Ty = Type::getInt8Ty(C);
     51   Constant *Init = Constant::getNullValue(Ty);
     52   GlobalVariable *Aliasee = new GlobalVariable(M, Ty, true,
     53                                                GlobalValue::ExternalLinkage,
     54                                                Init, "foo");
     55   GlobalAlias *GA = new GlobalAlias(Type::getInt8PtrTy(C),
     56                                     GlobalValue::ExternalLinkage,
     57                                     "bar", Aliasee, &M);
     58   GA->setUnnamedAddr(true);
     59   std::string Error;
     60   EXPECT_TRUE(verifyModule(M, ReturnStatusAction, &Error));
     61   EXPECT_TRUE(StringRef(Error).startswith("Alias cannot have unnamed_addr"));
     62 }
     63 }
     64 }
     65