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// Copyright 2014 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef V8_COMPILER_NODE_MATCHERS_H_
#define V8_COMPILER_NODE_MATCHERS_H_
#include "src/compiler/node.h"
#include "src/compiler/operator.h"
#include "src/unique.h"
namespace v8 {
namespace internal {
namespace compiler {
// A pattern matcher for nodes.
struct NodeMatcher {
explicit NodeMatcher(Node* node) : node_(node) {}
Node* node() const { return node_; }
const Operator* op() const { return node()->op(); }
IrOpcode::Value opcode() const { return node()->opcode(); }
bool HasProperty(Operator::Property property) const {
return op()->HasProperty(property);
}
Node* InputAt(int index) const { return node()->InputAt(index); }
#define DEFINE_IS_OPCODE(Opcode) \
bool Is##Opcode() const { return opcode() == IrOpcode::k##Opcode; }
ALL_OP_LIST(DEFINE_IS_OPCODE)
#undef DEFINE_IS_OPCODE
private:
Node* node_;
};
// A pattern matcher for abitrary value constants.
template <typename T, IrOpcode::Value kOpcode>
struct ValueMatcher : public NodeMatcher {
explicit ValueMatcher(Node* node)
: NodeMatcher(node), value_(), has_value_(opcode() == kOpcode) {
if (has_value_) {
value_ = OpParameter<T>(node);
}
}
bool HasValue() const { return has_value_; }
const T& Value() const {
DCHECK(HasValue());
return value_;
}
bool Is(const T& value) const {
return this->HasValue() && this->Value() == value;
}
bool IsInRange(const T& low, const T& high) const {
return this->HasValue() && low <= this->Value() && this->Value() <= high;
}
private:
T value_;
bool has_value_;
};
// A pattern matcher for integer constants.
template <typename T, IrOpcode::Value kOpcode>
struct IntMatcher FINAL : public ValueMatcher<T, kOpcode> {
explicit IntMatcher(Node* node) : ValueMatcher<T, kOpcode>(node) {}
bool IsPowerOf2() const {
return this->HasValue() && this->Value() > 0 &&
(this->Value() & (this->Value() - 1)) == 0;
}
};
typedef IntMatcher<int32_t, IrOpcode::kInt32Constant> Int32Matcher;
typedef IntMatcher<uint32_t, IrOpcode::kInt32Constant> Uint32Matcher;
typedef IntMatcher<int64_t, IrOpcode::kInt64Constant> Int64Matcher;
typedef IntMatcher<uint64_t, IrOpcode::kInt64Constant> Uint64Matcher;
#if V8_HOST_ARCH_32_BIT
typedef Int32Matcher IntPtrMatcher;
typedef Uint32Matcher UintPtrMatcher;
#else
typedef Int64Matcher IntPtrMatcher;
typedef Uint64Matcher UintPtrMatcher;
#endif
// A pattern matcher for floating point constants.
template <typename T, IrOpcode::Value kOpcode>
struct FloatMatcher FINAL : public ValueMatcher<T, kOpcode> {
explicit FloatMatcher(Node* node) : ValueMatcher<T, kOpcode>(node) {}
bool IsNaN() const { return this->HasValue() && std::isnan(this->Value()); }
};
typedef FloatMatcher<float, IrOpcode::kFloat32Constant> Float32Matcher;
typedef FloatMatcher<double, IrOpcode::kFloat64Constant> Float64Matcher;
typedef FloatMatcher<double, IrOpcode::kNumberConstant> NumberMatcher;
// A pattern matcher for heap object constants.
template <typename T>
struct HeapObjectMatcher FINAL
: public ValueMatcher<Unique<T>, IrOpcode::kHeapConstant> {
explicit HeapObjectMatcher(Node* node)
: ValueMatcher<Unique<T>, IrOpcode::kHeapConstant>(node) {}
};
// For shorter pattern matching code, this struct matches both the left and
// right hand sides of a binary operation and can put constants on the right
// if they appear on the left hand side of a commutative operation.
template <typename Left, typename Right>
struct BinopMatcher FINAL : public NodeMatcher {
explicit BinopMatcher(Node* node)
: NodeMatcher(node), left_(InputAt(0)), right_(InputAt(1)) {
if (HasProperty(Operator::kCommutative)) PutConstantOnRight();
}
const Left& left() const { return left_; }
const Right& right() const { return right_; }
bool IsFoldable() const { return left().HasValue() && right().HasValue(); }
bool LeftEqualsRight() const { return left().node() == right().node(); }
private:
void PutConstantOnRight() {
if (left().HasValue() && !right().HasValue()) {
std::swap(left_, right_);
node()->ReplaceInput(0, left().node());
node()->ReplaceInput(1, right().node());
}
}
Left left_;
Right right_;
};
typedef BinopMatcher<Int32Matcher, Int32Matcher> Int32BinopMatcher;
typedef BinopMatcher<Uint32Matcher, Uint32Matcher> Uint32BinopMatcher;
typedef BinopMatcher<Int64Matcher, Int64Matcher> Int64BinopMatcher;
typedef BinopMatcher<Uint64Matcher, Uint64Matcher> Uint64BinopMatcher;
typedef BinopMatcher<IntPtrMatcher, IntPtrMatcher> IntPtrBinopMatcher;
typedef BinopMatcher<UintPtrMatcher, UintPtrMatcher> UintPtrBinopMatcher;
typedef BinopMatcher<Float64Matcher, Float64Matcher> Float64BinopMatcher;
typedef BinopMatcher<NumberMatcher, NumberMatcher> NumberBinopMatcher;
} // namespace compiler
} // namespace internal
} // namespace v8
#endif // V8_COMPILER_NODE_MATCHERS_H_
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