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llvm-mirror/unittests/Support/ValueHandleTest.cpp
Chandler Carruth 4c1f3c24db Move all of the header files which are involved in modelling the LLVM IR 
into their new header subdirectory: include/llvm/IR. This matches the
directory structure of lib, and begins to correct a long standing point
of file layout clutter in LLVM.

There are still more header files to move here, but I wanted to handle
them in separate commits to make tracking what files make sense at each
layer easier.

The only really questionable files here are the target intrinsic
tablegen files. But that's a battle I'd rather not fight today.

I've updated both CMake and Makefile build systems (I think, and my
tests think, but I may have missed something).

I've also re-sorted the includes throughout the project. I'll be
committing updates to Clang, DragonEgg, and Polly momentarily.

llvm-svn: 171366
2013-01-02 11:36:10 +00:00

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//===- llvm/unittest/Support/ValueHandleTest.cpp - ValueHandle tests --------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "llvm/Support/ValueHandle.h"
#include "llvm/ADT/OwningPtr.h"
#include "llvm/IR/Constants.h"
#include "llvm/IR/Instructions.h"
#include "llvm/IR/LLVMContext.h"
#include "gtest/gtest.h"
#include <memory>
using namespace llvm;
namespace {
class ValueHandle : public testing::Test {
protected:
Constant *ConstantV;
std::auto_ptr<BitCastInst> BitcastV;
ValueHandle() :
ConstantV(ConstantInt::get(Type::getInt32Ty(getGlobalContext()), 0)),
BitcastV(new BitCastInst(ConstantV, Type::getInt32Ty(getGlobalContext()))) {
}
};
class ConcreteCallbackVH : public CallbackVH {
public:
ConcreteCallbackVH(Value *V) : CallbackVH(V) {}
};
TEST_F(ValueHandle, WeakVH_BasicOperation) {
WeakVH WVH(BitcastV.get());
EXPECT_EQ(BitcastV.get(), WVH);
WVH = ConstantV;
EXPECT_EQ(ConstantV, WVH);
// Make sure I can call a method on the underlying Value. It
// doesn't matter which method.
EXPECT_EQ(Type::getInt32Ty(getGlobalContext()), WVH->getType());
EXPECT_EQ(Type::getInt32Ty(getGlobalContext()), (*WVH).getType());
}
TEST_F(ValueHandle, WeakVH_Comparisons) {
WeakVH BitcastWVH(BitcastV.get());
WeakVH ConstantWVH(ConstantV);
EXPECT_TRUE(BitcastWVH == BitcastWVH);
EXPECT_TRUE(BitcastV.get() == BitcastWVH);
EXPECT_TRUE(BitcastWVH == BitcastV.get());
EXPECT_FALSE(BitcastWVH == ConstantWVH);
EXPECT_TRUE(BitcastWVH != ConstantWVH);
EXPECT_TRUE(BitcastV.get() != ConstantWVH);
EXPECT_TRUE(BitcastWVH != ConstantV);
EXPECT_FALSE(BitcastWVH != BitcastWVH);
// Cast to Value* so comparisons work.
Value *BV = BitcastV.get();
Value *CV = ConstantV;
EXPECT_EQ(BV < CV, BitcastWVH < ConstantWVH);
EXPECT_EQ(BV <= CV, BitcastWVH <= ConstantWVH);
EXPECT_EQ(BV > CV, BitcastWVH > ConstantWVH);
EXPECT_EQ(BV >= CV, BitcastWVH >= ConstantWVH);
EXPECT_EQ(BV < CV, BitcastV.get() < ConstantWVH);
EXPECT_EQ(BV <= CV, BitcastV.get() <= ConstantWVH);
EXPECT_EQ(BV > CV, BitcastV.get() > ConstantWVH);
EXPECT_EQ(BV >= CV, BitcastV.get() >= ConstantWVH);
EXPECT_EQ(BV < CV, BitcastWVH < ConstantV);
EXPECT_EQ(BV <= CV, BitcastWVH <= ConstantV);
EXPECT_EQ(BV > CV, BitcastWVH > ConstantV);
EXPECT_EQ(BV >= CV, BitcastWVH >= ConstantV);
}
TEST_F(ValueHandle, WeakVH_FollowsRAUW) {
WeakVH WVH(BitcastV.get());
WeakVH WVH_Copy(WVH);
WeakVH WVH_Recreated(BitcastV.get());
BitcastV->replaceAllUsesWith(ConstantV);
EXPECT_EQ(ConstantV, WVH);
EXPECT_EQ(ConstantV, WVH_Copy);
EXPECT_EQ(ConstantV, WVH_Recreated);
}
TEST_F(ValueHandle, WeakVH_NullOnDeletion) {
WeakVH WVH(BitcastV.get());
WeakVH WVH_Copy(WVH);
WeakVH WVH_Recreated(BitcastV.get());
BitcastV.reset();
Value *null_value = NULL;
EXPECT_EQ(null_value, WVH);
EXPECT_EQ(null_value, WVH_Copy);
EXPECT_EQ(null_value, WVH_Recreated);
}
TEST_F(ValueHandle, AssertingVH_BasicOperation) {
AssertingVH<CastInst> AVH(BitcastV.get());
CastInst *implicit_to_exact_type = AVH;
(void)implicit_to_exact_type; // Avoid warning.
AssertingVH<Value> GenericAVH(BitcastV.get());
EXPECT_EQ(BitcastV.get(), GenericAVH);
GenericAVH = ConstantV;
EXPECT_EQ(ConstantV, GenericAVH);
// Make sure I can call a method on the underlying CastInst. It
// doesn't matter which method.
EXPECT_FALSE(AVH->mayWriteToMemory());
EXPECT_FALSE((*AVH).mayWriteToMemory());
}
TEST_F(ValueHandle, AssertingVH_Const) {
const CastInst *ConstBitcast = BitcastV.get();
AssertingVH<const CastInst> AVH(ConstBitcast);
const CastInst *implicit_to_exact_type = AVH;
(void)implicit_to_exact_type; // Avoid warning.
}
TEST_F(ValueHandle, AssertingVH_Comparisons) {
AssertingVH<Value> BitcastAVH(BitcastV.get());
AssertingVH<Value> ConstantAVH(ConstantV);
EXPECT_TRUE(BitcastAVH == BitcastAVH);
EXPECT_TRUE(BitcastV.get() == BitcastAVH);
EXPECT_TRUE(BitcastAVH == BitcastV.get());
EXPECT_FALSE(BitcastAVH == ConstantAVH);
EXPECT_TRUE(BitcastAVH != ConstantAVH);
EXPECT_TRUE(BitcastV.get() != ConstantAVH);
EXPECT_TRUE(BitcastAVH != ConstantV);
EXPECT_FALSE(BitcastAVH != BitcastAVH);
// Cast to Value* so comparisons work.
Value *BV = BitcastV.get();
Value *CV = ConstantV;
EXPECT_EQ(BV < CV, BitcastAVH < ConstantAVH);
EXPECT_EQ(BV <= CV, BitcastAVH <= ConstantAVH);
EXPECT_EQ(BV > CV, BitcastAVH > ConstantAVH);
EXPECT_EQ(BV >= CV, BitcastAVH >= ConstantAVH);
EXPECT_EQ(BV < CV, BitcastV.get() < ConstantAVH);
EXPECT_EQ(BV <= CV, BitcastV.get() <= ConstantAVH);
EXPECT_EQ(BV > CV, BitcastV.get() > ConstantAVH);
EXPECT_EQ(BV >= CV, BitcastV.get() >= ConstantAVH);
EXPECT_EQ(BV < CV, BitcastAVH < ConstantV);
EXPECT_EQ(BV <= CV, BitcastAVH <= ConstantV);
EXPECT_EQ(BV > CV, BitcastAVH > ConstantV);
EXPECT_EQ(BV >= CV, BitcastAVH >= ConstantV);
}
TEST_F(ValueHandle, AssertingVH_DoesNotFollowRAUW) {
AssertingVH<Value> AVH(BitcastV.get());
BitcastV->replaceAllUsesWith(ConstantV);
EXPECT_EQ(BitcastV.get(), AVH);
}
#ifdef NDEBUG
TEST_F(ValueHandle, AssertingVH_ReducesToPointer) {
EXPECT_EQ(sizeof(CastInst *), sizeof(AssertingVH<CastInst>));
}
#else // !NDEBUG
#ifdef GTEST_HAS_DEATH_TEST
TEST_F(ValueHandle, AssertingVH_Asserts) {
AssertingVH<Value> AVH(BitcastV.get());
EXPECT_DEATH({BitcastV.reset();},
"An asserting value handle still pointed to this value!");
AssertingVH<Value> Copy(AVH);
AVH = NULL;
EXPECT_DEATH({BitcastV.reset();},
"An asserting value handle still pointed to this value!");
Copy = NULL;
BitcastV.reset();
}
#endif // GTEST_HAS_DEATH_TEST
#endif // NDEBUG
TEST_F(ValueHandle, CallbackVH_BasicOperation) {
ConcreteCallbackVH CVH(BitcastV.get());
EXPECT_EQ(BitcastV.get(), CVH);
CVH = ConstantV;
EXPECT_EQ(ConstantV, CVH);
// Make sure I can call a method on the underlying Value. It
// doesn't matter which method.
EXPECT_EQ(Type::getInt32Ty(getGlobalContext()), CVH->getType());
EXPECT_EQ(Type::getInt32Ty(getGlobalContext()), (*CVH).getType());
}
TEST_F(ValueHandle, CallbackVH_Comparisons) {
ConcreteCallbackVH BitcastCVH(BitcastV.get());
ConcreteCallbackVH ConstantCVH(ConstantV);
EXPECT_TRUE(BitcastCVH == BitcastCVH);
EXPECT_TRUE(BitcastV.get() == BitcastCVH);
EXPECT_TRUE(BitcastCVH == BitcastV.get());
EXPECT_FALSE(BitcastCVH == ConstantCVH);
EXPECT_TRUE(BitcastCVH != ConstantCVH);
EXPECT_TRUE(BitcastV.get() != ConstantCVH);
EXPECT_TRUE(BitcastCVH != ConstantV);
EXPECT_FALSE(BitcastCVH != BitcastCVH);
// Cast to Value* so comparisons work.
Value *BV = BitcastV.get();
Value *CV = ConstantV;
EXPECT_EQ(BV < CV, BitcastCVH < ConstantCVH);
EXPECT_EQ(BV <= CV, BitcastCVH <= ConstantCVH);
EXPECT_EQ(BV > CV, BitcastCVH > ConstantCVH);
EXPECT_EQ(BV >= CV, BitcastCVH >= ConstantCVH);
EXPECT_EQ(BV < CV, BitcastV.get() < ConstantCVH);
EXPECT_EQ(BV <= CV, BitcastV.get() <= ConstantCVH);
EXPECT_EQ(BV > CV, BitcastV.get() > ConstantCVH);
EXPECT_EQ(BV >= CV, BitcastV.get() >= ConstantCVH);
EXPECT_EQ(BV < CV, BitcastCVH < ConstantV);
EXPECT_EQ(BV <= CV, BitcastCVH <= ConstantV);
EXPECT_EQ(BV > CV, BitcastCVH > ConstantV);
EXPECT_EQ(BV >= CV, BitcastCVH >= ConstantV);
}
TEST_F(ValueHandle, CallbackVH_CallbackOnDeletion) {
class RecordingVH : public CallbackVH {
public:
int DeletedCalls;
int AURWCalls;
RecordingVH() : DeletedCalls(0), AURWCalls(0) {}
RecordingVH(Value *V) : CallbackVH(V), DeletedCalls(0), AURWCalls(0) {}
private:
virtual void deleted() { DeletedCalls++; CallbackVH::deleted(); }
virtual void allUsesReplacedWith(Value *) { AURWCalls++; }
};
RecordingVH RVH;
RVH = BitcastV.get();
EXPECT_EQ(0, RVH.DeletedCalls);
EXPECT_EQ(0, RVH.AURWCalls);
BitcastV.reset();
EXPECT_EQ(1, RVH.DeletedCalls);
EXPECT_EQ(0, RVH.AURWCalls);
}
TEST_F(ValueHandle, CallbackVH_CallbackOnRAUW) {
class RecordingVH : public CallbackVH {
public:
int DeletedCalls;
Value *AURWArgument;
RecordingVH() : DeletedCalls(0), AURWArgument(NULL) {}
RecordingVH(Value *V)
: CallbackVH(V), DeletedCalls(0), AURWArgument(NULL) {}
private:
virtual void deleted() { DeletedCalls++; CallbackVH::deleted(); }
virtual void allUsesReplacedWith(Value *new_value) {
EXPECT_EQ(NULL, AURWArgument);
AURWArgument = new_value;
}
};
RecordingVH RVH;
RVH = BitcastV.get();
EXPECT_EQ(0, RVH.DeletedCalls);
EXPECT_EQ(NULL, RVH.AURWArgument);
BitcastV->replaceAllUsesWith(ConstantV);
EXPECT_EQ(0, RVH.DeletedCalls);
EXPECT_EQ(ConstantV, RVH.AURWArgument);
}
TEST_F(ValueHandle, CallbackVH_DeletionCanRAUW) {
class RecoveringVH : public CallbackVH {
public:
int DeletedCalls;
Value *AURWArgument;
LLVMContext *Context;
RecoveringVH() : DeletedCalls(0), AURWArgument(NULL),
Context(&getGlobalContext()) {}
RecoveringVH(Value *V)
: CallbackVH(V), DeletedCalls(0), AURWArgument(NULL),
Context(&getGlobalContext()) {}
private:
virtual void deleted() {
getValPtr()->replaceAllUsesWith(Constant::getNullValue(Type::getInt32Ty(getGlobalContext())));
setValPtr(NULL);
}
virtual void allUsesReplacedWith(Value *new_value) {
ASSERT_TRUE(NULL != getValPtr());
EXPECT_EQ(1U, getValPtr()->getNumUses());
EXPECT_EQ(NULL, AURWArgument);
AURWArgument = new_value;
}
};
// Normally, if a value has uses, deleting it will crash. However, we can use
// a CallbackVH to remove the uses before the check for no uses.
RecoveringVH RVH;
RVH = BitcastV.get();
std::auto_ptr<BinaryOperator> BitcastUser(
BinaryOperator::CreateAdd(RVH,
Constant::getNullValue(Type::getInt32Ty(getGlobalContext()))));
EXPECT_EQ(BitcastV.get(), BitcastUser->getOperand(0));
BitcastV.reset(); // Would crash without the ValueHandler.
EXPECT_EQ(Constant::getNullValue(Type::getInt32Ty(getGlobalContext())), RVH.AURWArgument);
EXPECT_EQ(Constant::getNullValue(Type::getInt32Ty(getGlobalContext())),
BitcastUser->getOperand(0));
}
TEST_F(ValueHandle, DestroyingOtherVHOnSameValueDoesntBreakIteration) {
// When a CallbackVH modifies other ValueHandles in its callbacks,
// that shouldn't interfere with non-modified ValueHandles receiving
// their appropriate callbacks.
//
// We create the active CallbackVH in the middle of a palindromic
// arrangement of other VHs so that the bad behavior would be
// triggered in whichever order callbacks run.
class DestroyingVH : public CallbackVH {
public:
OwningPtr<WeakVH> ToClear[2];
DestroyingVH(Value *V) {
ToClear[0].reset(new WeakVH(V));
setValPtr(V);
ToClear[1].reset(new WeakVH(V));
}
virtual void deleted() {
ToClear[0].reset();
ToClear[1].reset();
CallbackVH::deleted();
}
virtual void allUsesReplacedWith(Value *) {
ToClear[0].reset();
ToClear[1].reset();
}
};
{
WeakVH ShouldBeVisited1(BitcastV.get());
DestroyingVH C(BitcastV.get());
WeakVH ShouldBeVisited2(BitcastV.get());
BitcastV->replaceAllUsesWith(ConstantV);
EXPECT_EQ(ConstantV, static_cast<Value*>(ShouldBeVisited1));
EXPECT_EQ(ConstantV, static_cast<Value*>(ShouldBeVisited2));
}
{
WeakVH ShouldBeVisited1(BitcastV.get());
DestroyingVH C(BitcastV.get());
WeakVH ShouldBeVisited2(BitcastV.get());
BitcastV.reset();
EXPECT_EQ(NULL, static_cast<Value*>(ShouldBeVisited1));
EXPECT_EQ(NULL, static_cast<Value*>(ShouldBeVisited2));
}
}
TEST_F(ValueHandle, AssertingVHCheckedLast) {
// If a CallbackVH exists to clear out a group of AssertingVHs on
// Value deletion, the CallbackVH should get a chance to do so
// before the AssertingVHs assert.
class ClearingVH : public CallbackVH {
public:
AssertingVH<Value> *ToClear[2];
ClearingVH(Value *V,
AssertingVH<Value> &A0, AssertingVH<Value> &A1)
: CallbackVH(V) {
ToClear[0] = &A0;
ToClear[1] = &A1;
}
virtual void deleted() {
*ToClear[0] = 0;
*ToClear[1] = 0;
CallbackVH::deleted();
}
};
AssertingVH<Value> A1, A2;
A1 = BitcastV.get();
ClearingVH C(BitcastV.get(), A1, A2);
A2 = BitcastV.get();
// C.deleted() should run first, clearing the two AssertingVHs,
// which should prevent them from asserting.
BitcastV.reset();
}
}
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