94f651bc1b
(Does not yet use common AST expression type field.) R=jkummerow@chromium.org BUG= Review URL: https://codereview.chromium.org/16361015 git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@15093 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
356 lines
11 KiB
C++
356 lines
11 KiB
C++
// Copyright 2012 the V8 project authors. All rights reserved.
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following
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// disclaimer in the documentation and/or other materials provided
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// with the distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived
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// from this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#ifndef V8_TYPE_INFO_H_
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#define V8_TYPE_INFO_H_
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#include "allocation.h"
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#include "globals.h"
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#include "types.h"
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#include "zone-inl.h"
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namespace v8 {
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namespace internal {
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const int kMaxKeyedPolymorphism = 4;
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// Unknown
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// | \____________
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// | |
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// Primitive Non-primitive
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// | \_______ |
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// | | |
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// Number String |
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// / \ | |
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// Double Integer32 | /
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// | | / /
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// | Smi / /
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// | | / __/
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// Uninitialized.
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class TypeInfo {
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public:
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TypeInfo() : type_(kUninitialized) { }
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static TypeInfo Unknown() { return TypeInfo(kUnknown); }
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// We know it's a primitive type.
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static TypeInfo Primitive() { return TypeInfo(kPrimitive); }
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// We know it's a number of some sort.
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static TypeInfo Number() { return TypeInfo(kNumber); }
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// We know it's a signed 32 bit integer.
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static TypeInfo Integer32() { return TypeInfo(kInteger32); }
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// We know it's a Smi.
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static TypeInfo Smi() { return TypeInfo(kSmi); }
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// We know it's a heap number.
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static TypeInfo Double() { return TypeInfo(kDouble); }
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// We know it's a string.
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static TypeInfo String() { return TypeInfo(kString); }
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// We know it's an internalized string.
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static TypeInfo InternalizedString() { return TypeInfo(kInternalizedString); }
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// We know it's a non-primitive (object) type.
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static TypeInfo NonPrimitive() { return TypeInfo(kNonPrimitive); }
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// We haven't started collecting info yet.
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static TypeInfo Uninitialized() { return TypeInfo(kUninitialized); }
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int ToInt() {
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return type_;
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}
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static TypeInfo FromInt(int bit_representation) {
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Type t = static_cast<Type>(bit_representation);
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ASSERT(t == kUnknown ||
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t == kPrimitive ||
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t == kNumber ||
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t == kInteger32 ||
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t == kSmi ||
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t == kDouble ||
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t == kString ||
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t == kNonPrimitive);
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return TypeInfo(t);
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}
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// Return the weakest (least precise) common type.
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static TypeInfo Combine(TypeInfo a, TypeInfo b) {
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return TypeInfo(static_cast<Type>(a.type_ & b.type_));
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}
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// Integer32 is an integer that can be represented as a signed
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// 32-bit integer. It has to be
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// in the range [-2^31, 2^31 - 1]. We also have to check for negative 0
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// as it is not an Integer32.
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static inline bool IsInt32Double(double value) {
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const DoubleRepresentation minus_zero(-0.0);
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DoubleRepresentation rep(value);
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if (rep.bits == minus_zero.bits) return false;
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if (value >= kMinInt && value <= kMaxInt &&
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value == static_cast<int32_t>(value)) {
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return true;
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}
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return false;
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}
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static TypeInfo FromValue(Handle<Object> value);
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bool Equals(const TypeInfo& other) {
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return type_ == other.type_;
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}
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inline bool IsUnknown() {
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ASSERT(type_ != kUninitialized);
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return type_ == kUnknown;
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}
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inline bool IsPrimitive() {
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ASSERT(type_ != kUninitialized);
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return ((type_ & kPrimitive) == kPrimitive);
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}
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inline bool IsNumber() {
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ASSERT(type_ != kUninitialized);
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return ((type_ & kNumber) == kNumber);
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}
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inline bool IsSmi() {
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ASSERT(type_ != kUninitialized);
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return ((type_ & kSmi) == kSmi);
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}
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inline bool IsInternalizedString() {
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ASSERT(type_ != kUninitialized);
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return ((type_ & kInternalizedString) == kInternalizedString);
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}
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inline bool IsNonInternalizedString() {
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ASSERT(type_ != kUninitialized);
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return ((type_ & kInternalizedString) == kString);
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}
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inline bool IsInteger32() {
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ASSERT(type_ != kUninitialized);
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return ((type_ & kInteger32) == kInteger32);
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}
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inline bool IsDouble() {
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ASSERT(type_ != kUninitialized);
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return ((type_ & kDouble) == kDouble);
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}
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inline bool IsString() {
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ASSERT(type_ != kUninitialized);
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return ((type_ & kString) == kString);
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}
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inline bool IsNonPrimitive() {
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ASSERT(type_ != kUninitialized);
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return ((type_ & kNonPrimitive) == kNonPrimitive);
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}
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inline bool IsUninitialized() {
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return type_ == kUninitialized;
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}
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const char* ToString() {
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switch (type_) {
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case kUnknown: return "Unknown";
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case kPrimitive: return "Primitive";
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case kNumber: return "Number";
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case kInteger32: return "Integer32";
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case kSmi: return "Smi";
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case kInternalizedString: return "InternalizedString";
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case kDouble: return "Double";
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case kString: return "String";
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case kNonPrimitive: return "Object";
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case kUninitialized: return "Uninitialized";
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}
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UNREACHABLE();
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return "Unreachable code";
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}
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private:
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enum Type {
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kUnknown = 0, // 0000000
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kPrimitive = 0x10, // 0010000
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kNumber = 0x11, // 0010001
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kInteger32 = 0x13, // 0010011
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kSmi = 0x17, // 0010111
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kDouble = 0x19, // 0011001
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kString = 0x30, // 0110000
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kInternalizedString = 0x32, // 0110010
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kNonPrimitive = 0x40, // 1000000
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kUninitialized = 0x7f // 1111111
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};
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explicit inline TypeInfo(Type t) : type_(t) { }
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Type type_;
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};
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enum StringStubFeedback {
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DEFAULT_STRING_STUB = 0,
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STRING_INDEX_OUT_OF_BOUNDS = 1
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};
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// Forward declarations.
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// TODO(rossberg): these should all go away eventually.
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class Assignment;
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class BinaryOperation;
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class Call;
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class CallNew;
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class CaseClause;
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class CompilationInfo;
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class CountOperation;
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class Expression;
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class ForInStatement;
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class ICStub;
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class Property;
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class SmallMapList;
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class UnaryOperation;
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class ObjectLiteral;
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class ObjectLiteralProperty;
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class TypeFeedbackOracle: public ZoneObject {
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public:
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TypeFeedbackOracle(Handle<Code> code,
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Handle<Context> native_context,
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Isolate* isolate,
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Zone* zone);
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bool LoadIsMonomorphicNormal(Property* expr);
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bool LoadIsUninitialized(Property* expr);
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bool LoadIsPolymorphic(Property* expr);
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bool StoreIsMonomorphicNormal(TypeFeedbackId ast_id);
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bool StoreIsPolymorphic(TypeFeedbackId ast_id);
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bool CallIsMonomorphic(Call* expr);
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bool CallNewIsMonomorphic(CallNew* expr);
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bool ObjectLiteralStoreIsMonomorphic(ObjectLiteralProperty* prop);
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// TODO(1571) We can't use ForInStatement::ForInType as the return value due
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// to various cycles in our headers.
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byte ForInType(ForInStatement* expr);
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Handle<Map> LoadMonomorphicReceiverType(Property* expr);
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Handle<Map> StoreMonomorphicReceiverType(TypeFeedbackId id);
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KeyedAccessStoreMode GetStoreMode(TypeFeedbackId ast_id);
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void LoadReceiverTypes(Property* expr,
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Handle<String> name,
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SmallMapList* types);
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void StoreReceiverTypes(Assignment* expr,
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Handle<String> name,
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SmallMapList* types);
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void CallReceiverTypes(Call* expr,
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Handle<String> name,
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CallKind call_kind,
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SmallMapList* types);
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void CollectKeyedReceiverTypes(TypeFeedbackId ast_id,
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SmallMapList* types);
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static bool CanRetainOtherContext(Map* map, Context* native_context);
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static bool CanRetainOtherContext(JSFunction* function,
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Context* native_context);
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void CollectPolymorphicMaps(Handle<Code> code, SmallMapList* types);
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CheckType GetCallCheckType(Call* expr);
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Handle<JSFunction> GetCallTarget(Call* expr);
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Handle<JSFunction> GetCallNewTarget(CallNew* expr);
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Handle<Cell> GetCallNewAllocationInfoCell(CallNew* expr);
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Handle<Map> GetObjectLiteralStoreMap(ObjectLiteralProperty* prop);
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bool LoadIsBuiltin(Property* expr, Builtins::Name id);
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bool LoadIsStub(Property* expr, ICStub* stub);
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// TODO(1571) We can't use ToBooleanStub::Types as the return value because
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// of various cycles in our headers. Death to tons of implementations in
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// headers!! :-P
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byte ToBooleanTypes(TypeFeedbackId id);
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// Get type information for arithmetic operations and compares.
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TypeInfo UnaryType(UnaryOperation* expr);
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void BinaryType(BinaryOperation* expr,
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TypeInfo* left,
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TypeInfo* right,
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TypeInfo* result,
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bool* has_fixed_right_arg,
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int* fixed_right_arg_value);
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void CompareTypes(TypeFeedbackId id,
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Handle<Type>* left_type,
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Handle<Type>* right_type,
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Handle<Type>* overall_type,
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Handle<Type>* compare_nil_type);
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Handle<Type> ClauseType(TypeFeedbackId id);
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TypeInfo IncrementType(CountOperation* expr);
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Zone* zone() const { return zone_; }
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Isolate* isolate() const { return isolate_; }
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private:
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void CollectReceiverTypes(TypeFeedbackId ast_id,
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Handle<String> name,
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Code::Flags flags,
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SmallMapList* types);
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void SetInfo(TypeFeedbackId ast_id, Object* target);
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void BuildDictionary(Handle<Code> code);
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void GetRelocInfos(Handle<Code> code, ZoneList<RelocInfo>* infos);
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void CreateDictionary(Handle<Code> code, ZoneList<RelocInfo>* infos);
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void RelocateRelocInfos(ZoneList<RelocInfo>* infos,
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byte* old_start,
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byte* new_start);
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void ProcessRelocInfos(ZoneList<RelocInfo>* infos);
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void ProcessTypeFeedbackCells(Handle<Code> code);
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// Returns an element from the backing store. Returns undefined if
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// there is no information.
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Handle<Object> GetInfo(TypeFeedbackId ast_id);
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// Return the cell that contains type feedback.
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Handle<Cell> GetInfoCell(TypeFeedbackId ast_id);
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private:
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Handle<Context> native_context_;
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Isolate* isolate_;
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Zone* zone_;
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Handle<UnseededNumberDictionary> dictionary_;
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DISALLOW_COPY_AND_ASSIGN(TypeFeedbackOracle);
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};
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} } // namespace v8::internal
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#endif // V8_TYPE_INFO_H_
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