unittests/VMCore/VerifierTest.cpp

   1 //===- llvm/unittest/VMCore/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/Constants.h"
  11 #include "llvm/DerivedTypes.h"
  12 #include "llvm/Function.h"
  13 #include "llvm/GlobalAlias.h"
  14 #include "llvm/GlobalVariable.h"
  15 #include "llvm/Instructions.h"
  16 #include "llvm/LLVMContext.h"
  17 #include "llvm/Module.h"
  18 #include "llvm/ADT/OwningPtr.h"
  19 #include "llvm/Analysis/Verifier.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   const 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 }