2012-01-25 16:31:25 +00:00
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// Copyright 2012 the V8 project authors. All rights reserved.
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2010-02-15 14:24:38 +00:00
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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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2010-03-25 12:44:15 +00:00
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#ifndef V8_TYPE_INFO_H_
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#define V8_TYPE_INFO_H_
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2010-02-15 14:24:38 +00:00
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2011-05-06 06:50:20 +00:00
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#include "allocation.h"
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2012-03-13 12:11:46 +00:00
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#include "ast.h"
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2010-03-24 15:55:15 +00:00
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#include "globals.h"
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2010-12-07 11:31:57 +00:00
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#include "zone-inl.h"
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2010-03-24 15:55:15 +00:00
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2010-02-15 14:24:38 +00:00
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namespace v8 {
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namespace internal {
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2011-06-20 10:19:00 +00:00
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const int kMaxKeyedPolymorphism = 4;
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2010-12-07 11:31:57 +00:00
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// Unknown
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2011-04-27 15:02:59 +00:00
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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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2010-03-05 23:54:13 +00:00
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2010-03-25 12:44:15 +00:00
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class TypeInfo {
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public:
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TypeInfo() : type_(kUninitialized) { }
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2010-12-07 11:31:57 +00:00
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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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2010-02-15 14:24:38 +00:00
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// Return the weakest (least precise) common type.
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2010-03-25 12:44:15 +00:00
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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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2010-03-05 23:54:13 +00:00
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}
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2010-03-24 15:29:41 +00:00
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2011-02-03 15:36:44 +00:00
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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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2010-12-07 11:31:57 +00:00
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// as it is not an Integer32.
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2010-03-24 15:29:41 +00:00
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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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2010-12-07 11:31:57 +00:00
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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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2010-03-24 15:29:41 +00:00
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}
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return false;
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}
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2010-03-26 11:34:00 +00:00
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static TypeInfo TypeFromValue(Handle<Object> value);
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2010-03-24 15:29:41 +00:00
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2010-12-07 11:31:57 +00:00
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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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2010-03-05 23:54:13 +00:00
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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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2010-03-05 23:54:13 +00:00
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}
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inline bool IsSmi() {
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2010-12-07 11:31:57 +00:00
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ASSERT(type_ != kUninitialized);
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return ((type_ & kSmi) == kSmi);
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2010-03-05 23:54:13 +00:00
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}
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2013-02-28 17:03:34 +00:00
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inline bool IsInternalizedString() {
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2011-11-17 13:57:55 +00:00
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ASSERT(type_ != kUninitialized);
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2013-02-28 17:03:34 +00:00
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return ((type_ & kInternalizedString) == kInternalizedString);
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2011-11-17 13:57:55 +00:00
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}
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2013-02-28 17:03:34 +00:00
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inline bool IsNonInternalizedString() {
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2011-11-17 13:57:55 +00:00
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ASSERT(type_ != kUninitialized);
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2013-02-28 17:03:34 +00:00
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return ((type_ & kInternalizedString) == kString);
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2011-11-17 13:57:55 +00:00
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}
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2010-03-05 23:54:13 +00:00
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inline bool IsInteger32() {
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2010-12-07 11:31:57 +00:00
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ASSERT(type_ != kUninitialized);
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return ((type_ & kInteger32) == kInteger32);
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2010-03-05 23:54:13 +00:00
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}
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2010-03-24 15:29:41 +00:00
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inline bool IsDouble() {
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2010-12-07 11:31:57 +00:00
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ASSERT(type_ != kUninitialized);
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return ((type_ & kDouble) == kDouble);
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2010-02-15 14:24:38 +00:00
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}
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2010-02-16 13:03:16 +00:00
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2010-03-29 11:48:57 +00:00
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inline bool IsString() {
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2010-12-07 11:31:57 +00:00
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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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2010-03-29 11:48:57 +00:00
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}
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2010-03-05 23:54:13 +00:00
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inline bool IsUninitialized() {
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return type_ == kUninitialized;
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2010-02-16 13:03:16 +00:00
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}
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2010-03-05 23:54:13 +00:00
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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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2013-02-28 17:03:34 +00:00
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case kInternalizedString: return "InternalizedString";
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2010-12-07 11:31:57 +00:00
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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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2010-02-16 13:03:16 +00:00
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}
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UNREACHABLE();
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return "Unreachable code";
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}
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2010-03-05 23:54:13 +00:00
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private:
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enum Type {
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2013-02-28 17:03:34 +00:00
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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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2010-03-05 23:54:13 +00:00
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};
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2012-11-14 15:59:45 +00:00
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2010-03-25 12:44:15 +00:00
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explicit inline TypeInfo(Type t) : type_(t) { }
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2010-03-05 23:54:13 +00:00
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Type type_;
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2010-02-15 14:24:38 +00:00
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};
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2010-03-05 23:54:13 +00:00
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2011-01-18 16:54:48 +00:00
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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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2010-12-07 11:31:57 +00:00
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// Forward declarations.
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class Assignment;
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class BinaryOperation;
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class Call;
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2012-01-27 13:03:19 +00:00
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class CallNew;
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2011-08-22 14:23:37 +00:00
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class CaseClause;
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2010-12-07 11:31:57 +00:00
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class CompareOperation;
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class CompilationInfo;
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2011-08-22 14:23:37 +00:00
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class CountOperation;
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2012-01-25 16:31:25 +00:00
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class Expression;
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2013-01-21 14:53:29 +00:00
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class ForInStatement;
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class ICStub;
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2010-12-07 11:31:57 +00:00
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class Property;
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2011-08-22 14:23:37 +00:00
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class SmallMapList;
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class UnaryOperation;
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2010-03-05 23:54:13 +00:00
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2012-07-17 16:24:40 +00:00
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class TypeFeedbackOracle: public ZoneObject {
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2010-12-07 11:31:57 +00:00
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public:
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2011-10-10 09:21:48 +00:00
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TypeFeedbackOracle(Handle<Code> code,
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2012-08-17 09:03:08 +00:00
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Handle<Context> native_context,
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2012-06-11 12:42:31 +00:00
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Isolate* isolate,
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Zone* zone);
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2010-03-24 12:34:27 +00:00
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2011-06-16 06:37:49 +00:00
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bool LoadIsMonomorphicNormal(Property* expr);
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2012-03-19 15:54:37 +00:00
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bool LoadIsUninitialized(Property* expr);
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2013-01-08 12:01:51 +00:00
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bool LoadIsPolymorphic(Property* expr);
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2012-08-06 14:13:09 +00:00
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bool StoreIsMonomorphicNormal(TypeFeedbackId ast_id);
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2013-01-08 12:01:51 +00:00
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bool StoreIsPolymorphic(TypeFeedbackId ast_id);
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2010-12-07 11:31:57 +00:00
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bool CallIsMonomorphic(Call* expr);
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2012-01-27 13:03:19 +00:00
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bool CallNewIsMonomorphic(CallNew* expr);
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2012-03-13 12:11:46 +00:00
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bool ObjectLiteralStoreIsMonomorphic(ObjectLiteral::Property* prop);
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2010-03-24 12:34:27 +00:00
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2012-03-02 11:33:33 +00:00
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bool IsForInFastCase(ForInStatement* expr);
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2010-12-07 11:31:57 +00:00
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Handle<Map> LoadMonomorphicReceiverType(Property* expr);
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2012-08-06 14:13:09 +00:00
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Handle<Map> StoreMonomorphicReceiverType(TypeFeedbackId ast_id);
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2010-03-05 23:54:13 +00:00
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2013-03-06 21:51:07 +00:00
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KeyedAccessStoreMode GetStoreMode(TypeFeedbackId ast_id);
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2011-08-22 14:23:37 +00:00
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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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2012-08-06 14:13:09 +00:00
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void CollectKeyedReceiverTypes(TypeFeedbackId ast_id,
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2011-08-22 14:23:37 +00:00
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SmallMapList* types);
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2010-03-05 23:54:13 +00:00
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2012-08-17 09:03:08 +00:00
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static bool CanRetainOtherContext(Map* map, Context* native_context);
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2011-12-14 14:01:54 +00:00
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static bool CanRetainOtherContext(JSFunction* function,
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2012-08-17 09:03:08 +00:00
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Context* native_context);
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2011-12-14 14:01:54 +00:00
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2013-03-04 14:03:27 +00:00
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void CollectPolymorphicMaps(Handle<Code> code, SmallMapList* types);
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2011-01-13 14:16:08 +00:00
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CheckType GetCallCheckType(Call* expr);
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Handle<JSObject> GetPrototypeForPrimitiveCheck(CheckType check);
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2011-09-27 11:42:02 +00:00
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Handle<JSFunction> GetCallTarget(Call* expr);
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2012-02-28 09:05:55 +00:00
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Handle<JSFunction> GetCallNewTarget(CallNew* expr);
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2013-03-01 16:06:34 +00:00
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ElementsKind GetCallNewElementsKind(CallNew* expr);
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2011-09-27 11:42:02 +00:00
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|
2012-03-13 12:11:46 +00:00
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Handle<Map> GetObjectLiteralStoreMap(ObjectLiteral::Property* prop);
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2010-12-07 11:31:57 +00:00
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bool LoadIsBuiltin(Property* expr, Builtins::Name id);
|
2013-01-21 14:53:29 +00:00
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bool LoadIsStub(Property* expr, ICStub* stub);
|
2010-03-05 23:54:13 +00:00
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2011-07-25 14:08:36 +00:00
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// TODO(1571) We can't use ToBooleanStub::Types as the return value because
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// of various cylces in our headers. Death to tons of implementations in
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// headers!! :-P
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2012-08-06 14:13:09 +00:00
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byte ToBooleanTypes(TypeFeedbackId ast_id);
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2011-07-25 14:08:36 +00:00
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2010-12-07 11:31:57 +00:00
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// Get type information for arithmetic operations and compares.
|
2011-04-28 17:49:55 +00:00
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TypeInfo UnaryType(UnaryOperation* expr);
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2012-11-14 15:59:45 +00:00
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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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void CompareType(CompareOperation* expr,
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TypeInfo* left_type,
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TypeInfo* right_type,
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TypeInfo* overall_type);
|
2011-12-09 09:26:14 +00:00
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Handle<Map> GetCompareMap(CompareOperation* expr);
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2010-12-07 11:31:57 +00:00
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TypeInfo SwitchType(CaseClause* clause);
|
2011-04-29 09:21:18 +00:00
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TypeInfo IncrementType(CountOperation* expr);
|
2010-03-05 23:54:13 +00:00
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2012-06-11 12:42:31 +00:00
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Zone* zone() const { return zone_; }
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2010-12-07 11:31:57 +00:00
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private:
|
2012-08-06 14:13:09 +00:00
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void CollectReceiverTypes(TypeFeedbackId ast_id,
|
2011-08-22 14:23:37 +00:00
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Handle<String> name,
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Code::Flags flags,
|
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|
|
SmallMapList* types);
|
2010-03-05 23:54:13 +00:00
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|
2012-08-06 14:13:09 +00:00
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void SetInfo(TypeFeedbackId ast_id, Object* target);
|
2011-03-30 15:31:16 +00:00
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|
2011-06-20 12:33:08 +00:00
|
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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,
|
|
|
|
byte* new_start);
|
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|
|
void ProcessRelocInfos(ZoneList<RelocInfo>* infos);
|
2012-01-27 13:03:19 +00:00
|
|
|
void ProcessTypeFeedbackCells(Handle<Code> code);
|
2010-03-24 12:34:27 +00:00
|
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|
|
2011-03-07 16:09:56 +00:00
|
|
|
// Returns an element from the backing store. Returns undefined if
|
|
|
|
// there is no information.
|
2013-03-01 16:06:34 +00:00
|
|
|
public:
|
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|
|
// TODO(mvstanton): how to get this information without making the method
|
|
|
|
// public?
|
2012-08-06 14:13:09 +00:00
|
|
|
Handle<Object> GetInfo(TypeFeedbackId ast_id);
|
2011-03-07 16:09:56 +00:00
|
|
|
|
2013-03-01 16:06:34 +00:00
|
|
|
private:
|
2012-08-17 09:03:08 +00:00
|
|
|
Handle<Context> native_context_;
|
2011-10-10 09:21:48 +00:00
|
|
|
Isolate* isolate_;
|
2012-01-16 09:44:35 +00:00
|
|
|
Handle<UnseededNumberDictionary> dictionary_;
|
2012-06-11 12:42:31 +00:00
|
|
|
Zone* zone_;
|
2010-03-24 12:34:27 +00:00
|
|
|
|
2010-12-07 11:31:57 +00:00
|
|
|
DISALLOW_COPY_AND_ASSIGN(TypeFeedbackOracle);
|
|
|
|
};
|
2010-03-05 23:54:13 +00:00
|
|
|
|
2010-02-15 14:24:38 +00:00
|
|
|
} } // namespace v8::internal
|
|
|
|
|
2010-03-25 12:44:15 +00:00
|
|
|
#endif // V8_TYPE_INFO_H_
|