llvm-6502/unittests/IR/VerifierTest.cpp
Chandler Carruth e608d695de [PM] Make the verifier work independently of any pass manager.
This makes the 'verifyFunction' and 'verifyModule' functions totally
independent operations on the LLVM IR. It also cleans up their API a bit
by lifting the abort behavior into their clients and just using an
optional raw_ostream parameter to control printing.

The implementation of the verifier is now just an InstVisitor with no
multiple inheritance. It also is significantly more const-correct, and
hides the const violations internally. The two layers that force us to
break const correctness are building a DomTree and dispatching through
the InstVisitor.

A new VerifierPass is used to implement the legacy pass manager
interface in terms of the other pieces.

The error messages produced may be slightly different now, and we may
have slightly different short circuiting behavior with different usage
models of the verifier, but generally everything works equivalently and
this unblocks wiring the verifier up to the new pass manager.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@199569 91177308-0d34-0410-b5e6-96231b3b80d8
2014-01-19 02:22:18 +00:00

85 lines
2.9 KiB
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//===- llvm/unittest/IR/VerifierTest.cpp - Verifier unit tests ------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "llvm/IR/Verifier.h"
#include "llvm/ADT/OwningPtr.h"
#include "llvm/IR/Constants.h"
#include "llvm/IR/DerivedTypes.h"
#include "llvm/IR/Function.h"
#include "llvm/IR/GlobalAlias.h"
#include "llvm/IR/GlobalVariable.h"
#include "llvm/IR/Instructions.h"
#include "llvm/IR/LLVMContext.h"
#include "llvm/IR/Module.h"
#include "gtest/gtest.h"
namespace llvm {
namespace {
TEST(VerifierTest, Branch_i1) {
LLVMContext &C = getGlobalContext();
Module M("M", C);
FunctionType *FTy = FunctionType::get(Type::getVoidTy(C), /*isVarArg=*/false);
Function *F = cast<Function>(M.getOrInsertFunction("foo", FTy));
BasicBlock *Entry = BasicBlock::Create(C, "entry", F);
BasicBlock *Exit = BasicBlock::Create(C, "exit", F);
ReturnInst::Create(C, Exit);
// To avoid triggering an assertion in BranchInst::Create, we first create
// a branch with an 'i1' condition ...
Constant *False = ConstantInt::getFalse(C);
BranchInst *BI = BranchInst::Create(Exit, Exit, False, Entry);
// ... then use setOperand to redirect it to a value of different type.
Constant *Zero32 = ConstantInt::get(IntegerType::get(C, 32), 0);
BI->setOperand(0, Zero32);
EXPECT_TRUE(verifyFunction(*F));
}
TEST(VerifierTest, AliasUnnamedAddr) {
LLVMContext &C = getGlobalContext();
Module M("M", C);
Type *Ty = Type::getInt8Ty(C);
Constant *Init = Constant::getNullValue(Ty);
GlobalVariable *Aliasee = new GlobalVariable(M, Ty, true,
GlobalValue::ExternalLinkage,
Init, "foo");
GlobalAlias *GA = new GlobalAlias(Type::getInt8PtrTy(C),
GlobalValue::ExternalLinkage,
"bar", Aliasee, &M);
GA->setUnnamedAddr(true);
std::string Error;
raw_string_ostream ErrorOS(Error);
EXPECT_TRUE(verifyModule(M, &ErrorOS));
EXPECT_TRUE(
StringRef(ErrorOS.str()).startswith("Alias cannot have unnamed_addr"));
}
TEST(VerifierTest, InvalidRetAttribute) {
LLVMContext &C = getGlobalContext();
Module M("M", C);
FunctionType *FTy = FunctionType::get(Type::getInt32Ty(C), /*isVarArg=*/false);
Function *F = cast<Function>(M.getOrInsertFunction("foo", FTy));
AttributeSet AS = F->getAttributes();
F->setAttributes(AS.addAttribute(C, AttributeSet::ReturnIndex,
Attribute::UWTable));
std::string Error;
raw_string_ostream ErrorOS(Error);
EXPECT_TRUE(verifyModule(M, &ErrorOS));
EXPECT_TRUE(StringRef(ErrorOS.str()).startswith(
"Attribute 'uwtable' only applies to functions!"));
}
}
}