diff options
Diffstat (limited to 'chromium/v8/src/type-info.h')
| -rw-r--r-- | chromium/v8/src/type-info.h | 270 |
1 files changed, 29 insertions, 241 deletions
diff --git a/chromium/v8/src/type-info.h b/chromium/v8/src/type-info.h index 0ff99e994d9..706921adb08 100644 --- a/chromium/v8/src/type-info.h +++ b/chromium/v8/src/type-info.h @@ -1,224 +1,19 @@ // Copyright 2012 the V8 project authors. All rights reserved. -// Redistribution and use in source and binary forms, with or without -// modification, are permitted provided that the following conditions are -// met: -// -// * Redistributions of source code must retain the above copyright -// notice, this list of conditions and the following disclaimer. -// * Redistributions in binary form must reproduce the above -// copyright notice, this list of conditions and the following -// disclaimer in the documentation and/or other materials provided -// with the distribution. -// * Neither the name of Google Inc. nor the names of its -// contributors may be used to endorse or promote products derived -// from this software without specific prior written permission. -// -// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS -// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT -// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR -// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT -// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, -// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT -// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, -// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY -// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT -// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE -// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. +// Use of this source code is governed by a BSD-style license that can be +// found in the LICENSE file. #ifndef V8_TYPE_INFO_H_ #define V8_TYPE_INFO_H_ -#include "allocation.h" -#include "globals.h" -#include "types.h" -#include "zone-inl.h" +#include "src/allocation.h" +#include "src/globals.h" +#include "src/types.h" +#include "src/zone-inl.h" namespace v8 { namespace internal { -const int kMaxKeyedPolymorphism = 4; - -// Unknown -// | \____________ -// | | -// Primitive Non-primitive -// | \_______ | -// | | | -// Number String | -// / \ | | -// Double Integer32 | / -// | | / / -// | Smi / / -// | | / __/ -// Uninitialized. - -class TypeInfo { - public: - TypeInfo() : type_(kUninitialized) { } - - static TypeInfo Unknown() { return TypeInfo(kUnknown); } - // We know it's a primitive type. - static TypeInfo Primitive() { return TypeInfo(kPrimitive); } - // We know it's a number of some sort. - static TypeInfo Number() { return TypeInfo(kNumber); } - // We know it's a signed 32 bit integer. - static TypeInfo Integer32() { return TypeInfo(kInteger32); } - // We know it's a Smi. - static TypeInfo Smi() { return TypeInfo(kSmi); } - // We know it's a heap number. - static TypeInfo Double() { return TypeInfo(kDouble); } - // We know it's a string. - static TypeInfo String() { return TypeInfo(kString); } - // We know it's an internalized string. - static TypeInfo InternalizedString() { return TypeInfo(kInternalizedString); } - // We know it's a non-primitive (object) type. - static TypeInfo NonPrimitive() { return TypeInfo(kNonPrimitive); } - // We haven't started collecting info yet. - static TypeInfo Uninitialized() { return TypeInfo(kUninitialized); } - - int ToInt() { - return type_; - } - - static TypeInfo FromInt(int bit_representation) { - Type t = static_cast<Type>(bit_representation); - ASSERT(t == kUnknown || - t == kPrimitive || - t == kNumber || - t == kInteger32 || - t == kSmi || - t == kDouble || - t == kString || - t == kNonPrimitive); - return TypeInfo(t); - } - - // Return the weakest (least precise) common type. - static TypeInfo Combine(TypeInfo a, TypeInfo b) { - return TypeInfo(static_cast<Type>(a.type_ & b.type_)); - } - - - // Integer32 is an integer that can be represented as a signed - // 32-bit integer. It has to be - // in the range [-2^31, 2^31 - 1]. We also have to check for negative 0 - // as it is not an Integer32. - static inline bool IsInt32Double(double value) { - const DoubleRepresentation minus_zero(-0.0); - DoubleRepresentation rep(value); - if (rep.bits == minus_zero.bits) return false; - if (value >= kMinInt && value <= kMaxInt && - value == static_cast<int32_t>(value)) { - return true; - } - return false; - } - - static TypeInfo FromValue(Handle<Object> value); - - bool Equals(const TypeInfo& other) { - return type_ == other.type_; - } - - inline bool IsUnknown() { - ASSERT(type_ != kUninitialized); - return type_ == kUnknown; - } - - inline bool IsPrimitive() { - ASSERT(type_ != kUninitialized); - return ((type_ & kPrimitive) == kPrimitive); - } - - inline bool IsNumber() { - ASSERT(type_ != kUninitialized); - return ((type_ & kNumber) == kNumber); - } - - inline bool IsSmi() { - ASSERT(type_ != kUninitialized); - return ((type_ & kSmi) == kSmi); - } - - inline bool IsInternalizedString() { - ASSERT(type_ != kUninitialized); - return ((type_ & kInternalizedString) == kInternalizedString); - } - - inline bool IsNonInternalizedString() { - ASSERT(type_ != kUninitialized); - return ((type_ & kInternalizedString) == kString); - } - - inline bool IsInteger32() { - ASSERT(type_ != kUninitialized); - return ((type_ & kInteger32) == kInteger32); - } - - inline bool IsDouble() { - ASSERT(type_ != kUninitialized); - return ((type_ & kDouble) == kDouble); - } - - inline bool IsString() { - ASSERT(type_ != kUninitialized); - return ((type_ & kString) == kString); - } - - inline bool IsNonPrimitive() { - ASSERT(type_ != kUninitialized); - return ((type_ & kNonPrimitive) == kNonPrimitive); - } - - inline bool IsUninitialized() { - return type_ == kUninitialized; - } - - const char* ToString() { - switch (type_) { - case kUnknown: return "Unknown"; - case kPrimitive: return "Primitive"; - case kNumber: return "Number"; - case kInteger32: return "Integer32"; - case kSmi: return "Smi"; - case kInternalizedString: return "InternalizedString"; - case kDouble: return "Double"; - case kString: return "String"; - case kNonPrimitive: return "Object"; - case kUninitialized: return "Uninitialized"; - } - UNREACHABLE(); - return "Unreachable code"; - } - - private: - enum Type { - kUnknown = 0, // 0000000 - kPrimitive = 0x10, // 0010000 - kNumber = 0x11, // 0010001 - kInteger32 = 0x13, // 0010011 - kSmi = 0x17, // 0010111 - kDouble = 0x19, // 0011001 - kString = 0x30, // 0110000 - kInternalizedString = 0x32, // 0110010 - kNonPrimitive = 0x40, // 1000000 - kUninitialized = 0x7f // 1111111 - }; - - explicit inline TypeInfo(Type t) : type_(t) { } - - Type type_; -}; - - -enum StringStubFeedback { - DEFAULT_STRING_STUB = 0, - STRING_INDEX_OUT_OF_BOUNDS = 1 -}; - - // Forward declarations. -class CompilationInfo; class ICStub; class SmallMapList; @@ -226,32 +21,26 @@ class SmallMapList; class TypeFeedbackOracle: public ZoneObject { public: TypeFeedbackOracle(Handle<Code> code, + Handle<FixedArray> feedback_vector, Handle<Context> native_context, - Isolate* isolate, Zone* zone); bool LoadIsUninitialized(TypeFeedbackId id); - bool LoadIsPreMonomorphic(TypeFeedbackId id); bool StoreIsUninitialized(TypeFeedbackId id); - bool StoreIsPreMonomorphic(TypeFeedbackId id); bool StoreIsKeyedPolymorphic(TypeFeedbackId id); + bool CallIsMonomorphic(int slot); bool CallIsMonomorphic(TypeFeedbackId aid); bool KeyedArrayCallIsHoley(TypeFeedbackId id); - bool CallNewIsMonomorphic(TypeFeedbackId id); + bool CallNewIsMonomorphic(int slot); // TODO(1571) We can't use ForInStatement::ForInType as the return value due // to various cycles in our headers. // TODO(rossberg): once all oracle access is removed from ast.cc, it should // be possible. - byte ForInType(TypeFeedbackId id); + byte ForInType(int feedback_vector_slot); KeyedAccessStoreMode GetStoreMode(TypeFeedbackId id); - void CallReceiverTypes(TypeFeedbackId id, - Handle<String> name, - int arity, - CallKind call_kind, - SmallMapList* types); void PropertyReceiverTypes(TypeFeedbackId id, Handle<String> name, SmallMapList* receiver_types, @@ -275,10 +64,10 @@ class TypeFeedbackOracle: public ZoneObject { static bool CanRetainOtherContext(JSFunction* function, Context* native_context); - CheckType GetCallCheckType(TypeFeedbackId id); - Handle<JSFunction> GetCallTarget(TypeFeedbackId id); - Handle<JSFunction> GetCallNewTarget(TypeFeedbackId id); - Handle<Cell> GetCallNewAllocationInfoCell(TypeFeedbackId id); + Handle<JSFunction> GetCallTarget(int slot); + Handle<AllocationSite> GetCallAllocationSite(int slot); + Handle<JSFunction> GetCallNewTarget(int slot); + Handle<AllocationSite> GetCallNewAllocationSite(int slot); bool LoadIsBuiltin(TypeFeedbackId id, Builtins::Name builtin_id); bool LoadIsStub(TypeFeedbackId id, ICStub* stub); @@ -290,23 +79,22 @@ class TypeFeedbackOracle: public ZoneObject { // Get type information for arithmetic operations and compares. void BinaryType(TypeFeedbackId id, - Handle<Type>* left, - Handle<Type>* right, - Handle<Type>* result, + Type** left, + Type** right, + Type** result, Maybe<int>* fixed_right_arg, + Handle<AllocationSite>* allocation_site, Token::Value operation); void CompareType(TypeFeedbackId id, - Handle<Type>* left, - Handle<Type>* right, - Handle<Type>* combined); - - Handle<Type> CountType(TypeFeedbackId id); + Type** left, + Type** right, + Type** combined); - Handle<Type> ClauseType(TypeFeedbackId id); + Type* CountType(TypeFeedbackId id); Zone* zone() const { return zone_; } - Isolate* isolate() const { return isolate_; } + Isolate* isolate() const { return zone_->isolate(); } private: void CollectReceiverTypes(TypeFeedbackId id, @@ -320,23 +108,23 @@ class TypeFeedbackOracle: public ZoneObject { void GetRelocInfos(Handle<Code> code, ZoneList<RelocInfo>* infos); void CreateDictionary(Handle<Code> code, ZoneList<RelocInfo>* infos); void RelocateRelocInfos(ZoneList<RelocInfo>* infos, - byte* old_start, - byte* new_start); + Code* old_code, + Code* new_code); void ProcessRelocInfos(ZoneList<RelocInfo>* infos); - void ProcessTypeFeedbackCells(Handle<Code> code); // Returns an element from the backing store. Returns undefined if // there is no information. Handle<Object> GetInfo(TypeFeedbackId id); - // Return the cell that contains type feedback. - Handle<Cell> GetInfoCell(TypeFeedbackId id); + // Returns an element from the type feedback vector. Returns undefined + // if there is no information. + Handle<Object> GetInfo(int slot); private: Handle<Context> native_context_; - Isolate* isolate_; Zone* zone_; Handle<UnseededNumberDictionary> dictionary_; + Handle<FixedArray> feedback_vector_; DISALLOW_COPY_AND_ASSIGN(TypeFeedbackOracle); }; |