llvm-6502/unittests/IR/VerifierTest.cpp
Rafael Espindola 6fd1b8ee48 Allow aliases to be unnamed_addr.
Alias with unnamed_addr were in a strange state. It is stored in GlobalValue,
the language reference talks about "unnamed_addr aliases" but the verifier
was rejecting them.

It seems natural to allow unnamed_addr in aliases:

* It is a property of how it is accessed, not of the data itself.
* It is perfectly possible to write code that depends on the address
of an alias.

This patch then makes unname_addr legal for aliases. One side effect is that
the syntax changes for a corner case: In globals, unnamed_addr is now printed
before the address space.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210302 91177308-0d34-0410-b5e6-96231b3b80d8
2014-06-06 01:20:28 +00:00

65 lines
2.1 KiB
C++

//===- 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/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, 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!"));
}
}
}