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/Instructions.h"
  14 #include "llvm/LLVMContext.h"
  15 #include "llvm/Analysis/Verifier.h"
  16 #include "gtest/gtest.h"
  17
  18 namespace llvm {
  19 namespace {
  20
  21 TEST(VerifierTest, Branch_i1) {
  22   LLVMContext &C = getGlobalContext();
  23   FunctionType *FTy = FunctionType::get(Type::getVoidTy(C), /*isVarArg=*/false);
  24   Function *F = Function::Create(FTy, GlobalValue::ExternalLinkage);
  25   BasicBlock *Entry = BasicBlock::Create(C, "entry", F);
  26   BasicBlock *Exit = BasicBlock::Create(C, "exit", F);
  27   ReturnInst::Create(C, Exit);
  28
  29   // To avoid triggering an assertion in BranchInst::Create, we first create
  30   // a branch with an 'i1' condition ...
  31
  32   Constant *False = ConstantInt::getFalse(C);
  33   BranchInst *BI = BranchInst::Create(Exit, Exit, False, Entry);
  34
  35   // ... then use setOperand to redirect it to a value of different type.
  36
  37   Constant *Zero32 = ConstantInt::get(IntegerType::get(C, 32), 0);
  38   BI->setOperand(0, Zero32);
  39
  40   EXPECT_TRUE(verifyFunction(*F, ReturnStatusAction));
  41 }
  42
  43 }
  44 }