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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/Constants.h"
#include "llvm/Instructions.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::Int32Ty, 0)),
BitcastV(new BitCastInst(ConstantV, Type::Int32Ty)) {
}
};
class ConcreteCallbackVH : public CallbackVH {
public:
ConcreteCallbackVH() : CallbackVH() {}
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::Int32Ty, WVH->getType());
EXPECT_EQ(Type::Int32Ty, (*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;
implicit_to_exact_type = 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;
implicit_to_exact_type = 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::Int32Ty, CVH->getType());
EXPECT_EQ(Type::Int32Ty, (*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::Int32Ty));
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::Int32Ty)));
EXPECT_EQ(BitcastV.get(), BitcastUser->getOperand(0));
BitcastV.reset(); // Would crash without the ValueHandler.
EXPECT_EQ(Constant::getNullValue(Type::Int32Ty), RVH.AURWArgument);
EXPECT_EQ(Constant::getNullValue(Type::Int32Ty),
BitcastUser->getOperand(0));
}
}
|
