| // Copyright 2006-2008 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. |
| |
| #ifndef V8_STUB_CACHE_H_ |
| #define V8_STUB_CACHE_H_ |
| |
| #include "macro-assembler.h" |
| |
| namespace v8 { |
| namespace internal { |
| |
| |
| // The stub cache is used for megamorphic calls and property accesses. |
| // It maps (map, name, type)->Code* |
| |
| // The design of the table uses the inline cache stubs used for |
| // mono-morphic calls. The beauty of this, we do not have to |
| // invalidate the cache whenever a prototype map is changed. The stub |
| // validates the map chain as in the mono-morphic case. |
| |
| class SCTableReference; |
| |
| class StubCache : public AllStatic { |
| public: |
| struct Entry { |
| String* key; |
| Code* value; |
| }; |
| |
| |
| static void Initialize(bool create_heap_objects); |
| |
| // Computes the right stub matching. Inserts the result in the |
| // cache before returning. This might compile a stub if needed. |
| MUST_USE_RESULT static Object* ComputeLoadNonexistent(String* name, |
| JSObject* receiver); |
| |
| MUST_USE_RESULT static Object* ComputeLoadField(String* name, |
| JSObject* receiver, |
| JSObject* holder, |
| int field_index); |
| |
| MUST_USE_RESULT static Object* ComputeLoadCallback(String* name, |
| JSObject* receiver, |
| JSObject* holder, |
| AccessorInfo* callback); |
| |
| MUST_USE_RESULT static Object* ComputeLoadConstant(String* name, |
| JSObject* receiver, |
| JSObject* holder, |
| Object* value); |
| |
| MUST_USE_RESULT static Object* ComputeLoadInterceptor(String* name, |
| JSObject* receiver, |
| JSObject* holder); |
| |
| MUST_USE_RESULT static Object* ComputeLoadNormal(); |
| |
| |
| MUST_USE_RESULT static Object* ComputeLoadGlobal(String* name, |
| JSObject* receiver, |
| GlobalObject* holder, |
| JSGlobalPropertyCell* cell, |
| bool is_dont_delete); |
| |
| |
| // --- |
| |
| MUST_USE_RESULT static Object* ComputeKeyedLoadField(String* name, |
| JSObject* receiver, |
| JSObject* holder, |
| int field_index); |
| |
| MUST_USE_RESULT static Object* ComputeKeyedLoadCallback( |
| String* name, |
| JSObject* receiver, |
| JSObject* holder, |
| AccessorInfo* callback); |
| |
| MUST_USE_RESULT static Object* ComputeKeyedLoadConstant(String* name, |
| JSObject* receiver, |
| JSObject* holder, |
| Object* value); |
| |
| MUST_USE_RESULT static Object* ComputeKeyedLoadInterceptor(String* name, |
| JSObject* receiver, |
| JSObject* holder); |
| |
| MUST_USE_RESULT static Object* ComputeKeyedLoadArrayLength(String* name, |
| JSArray* receiver); |
| |
| MUST_USE_RESULT static Object* ComputeKeyedLoadStringLength(String* name, |
| String* receiver); |
| |
| MUST_USE_RESULT static Object* ComputeKeyedLoadFunctionPrototype( |
| String* name, |
| JSFunction* receiver); |
| |
| // --- |
| |
| MUST_USE_RESULT static Object* ComputeStoreField(String* name, |
| JSObject* receiver, |
| int field_index, |
| Map* transition = NULL); |
| |
| MUST_USE_RESULT static Object* ComputeStoreNormal(); |
| |
| MUST_USE_RESULT static Object* ComputeStoreGlobal(String* name, |
| GlobalObject* receiver, |
| JSGlobalPropertyCell* cell); |
| |
| MUST_USE_RESULT static Object* ComputeStoreCallback(String* name, |
| JSObject* receiver, |
| AccessorInfo* callback); |
| |
| MUST_USE_RESULT static Object* ComputeStoreInterceptor(String* name, |
| JSObject* receiver); |
| |
| // --- |
| |
| MUST_USE_RESULT static Object* ComputeKeyedStoreField(String* name, |
| JSObject* receiver, |
| int field_index, |
| Map* transition = NULL); |
| |
| // --- |
| |
| MUST_USE_RESULT static Object* ComputeCallField(int argc, |
| InLoopFlag in_loop, |
| Code::Kind, |
| String* name, |
| Object* object, |
| JSObject* holder, |
| int index); |
| |
| MUST_USE_RESULT static Object* ComputeCallConstant(int argc, |
| InLoopFlag in_loop, |
| Code::Kind, |
| String* name, |
| Object* object, |
| JSObject* holder, |
| JSFunction* function); |
| |
| MUST_USE_RESULT static Object* ComputeCallNormal(int argc, |
| InLoopFlag in_loop, |
| Code::Kind, |
| String* name, |
| JSObject* receiver); |
| |
| MUST_USE_RESULT static Object* ComputeCallInterceptor(int argc, |
| Code::Kind, |
| String* name, |
| Object* object, |
| JSObject* holder); |
| |
| MUST_USE_RESULT static Object* ComputeCallGlobal(int argc, |
| InLoopFlag in_loop, |
| Code::Kind, |
| String* name, |
| JSObject* receiver, |
| GlobalObject* holder, |
| JSGlobalPropertyCell* cell, |
| JSFunction* function); |
| |
| // --- |
| |
| MUST_USE_RESULT static Object* ComputeCallInitialize(int argc, |
| InLoopFlag in_loop, |
| Code::Kind kind); |
| |
| MUST_USE_RESULT static Object* ComputeCallPreMonomorphic(int argc, |
| InLoopFlag in_loop, |
| Code::Kind kind); |
| |
| MUST_USE_RESULT static Object* ComputeCallNormal(int argc, |
| InLoopFlag in_loop, |
| Code::Kind kind); |
| |
| MUST_USE_RESULT static Object* ComputeCallMegamorphic(int argc, |
| InLoopFlag in_loop, |
| Code::Kind kind); |
| |
| MUST_USE_RESULT static Object* ComputeCallMiss(int argc, Code::Kind kind); |
| |
| // Finds the Code object stored in the Heap::non_monomorphic_cache(). |
| MUST_USE_RESULT static Code* FindCallInitialize(int argc, |
| InLoopFlag in_loop, |
| Code::Kind kind); |
| |
| #ifdef ENABLE_DEBUGGER_SUPPORT |
| MUST_USE_RESULT static Object* ComputeCallDebugBreak(int argc, |
| Code::Kind kind); |
| |
| MUST_USE_RESULT static Object* ComputeCallDebugPrepareStepIn(int argc, |
| Code::Kind kind); |
| #endif |
| |
| // Update cache for entry hash(name, map). |
| static Code* Set(String* name, Map* map, Code* code); |
| |
| // Clear the lookup table (@ mark compact collection). |
| static void Clear(); |
| |
| // Generate code for probing the stub cache table. |
| // If extra != no_reg it might be used as am extra scratch register. |
| static void GenerateProbe(MacroAssembler* masm, |
| Code::Flags flags, |
| Register receiver, |
| Register name, |
| Register scratch, |
| Register extra); |
| |
| enum Table { |
| kPrimary, |
| kSecondary |
| }; |
| |
| private: |
| friend class SCTableReference; |
| static const int kPrimaryTableSize = 2048; |
| static const int kSecondaryTableSize = 512; |
| static Entry primary_[]; |
| static Entry secondary_[]; |
| |
| // Computes the hashed offsets for primary and secondary caches. |
| static int PrimaryOffset(String* name, Code::Flags flags, Map* map) { |
| // This works well because the heap object tag size and the hash |
| // shift are equal. Shifting down the length field to get the |
| // hash code would effectively throw away two bits of the hash |
| // code. |
| ASSERT(kHeapObjectTagSize == String::kHashShift); |
| // Compute the hash of the name (use entire hash field). |
| ASSERT(name->HasHashCode()); |
| uint32_t field = name->hash_field(); |
| // Using only the low bits in 64-bit mode is unlikely to increase the |
| // risk of collision even if the heap is spread over an area larger than |
| // 4Gb (and not at all if it isn't). |
| uint32_t map_low32bits = |
| static_cast<uint32_t>(reinterpret_cast<uintptr_t>(map)); |
| // We always set the in_loop bit to zero when generating the lookup code |
| // so do it here too so the hash codes match. |
| uint32_t iflags = |
| (static_cast<uint32_t>(flags) & ~Code::kFlagsNotUsedInLookup); |
| // Base the offset on a simple combination of name, flags, and map. |
| uint32_t key = (map_low32bits + field) ^ iflags; |
| return key & ((kPrimaryTableSize - 1) << kHeapObjectTagSize); |
| } |
| |
| static int SecondaryOffset(String* name, Code::Flags flags, int seed) { |
| // Use the seed from the primary cache in the secondary cache. |
| uint32_t string_low32bits = |
| static_cast<uint32_t>(reinterpret_cast<uintptr_t>(name)); |
| // We always set the in_loop bit to zero when generating the lookup code |
| // so do it here too so the hash codes match. |
| uint32_t iflags = |
| (static_cast<uint32_t>(flags) & ~Code::kFlagsICInLoopMask); |
| uint32_t key = seed - string_low32bits + iflags; |
| return key & ((kSecondaryTableSize - 1) << kHeapObjectTagSize); |
| } |
| |
| // Compute the entry for a given offset in exactly the same way as |
| // we do in generated code. We generate an hash code that already |
| // ends in String::kHashShift 0s. Then we shift it so it is a multiple |
| // of sizeof(Entry). This makes it easier to avoid making mistakes |
| // in the hashed offset computations. |
| static Entry* entry(Entry* table, int offset) { |
| const int shift_amount = kPointerSizeLog2 + 1 - String::kHashShift; |
| return reinterpret_cast<Entry*>( |
| reinterpret_cast<Address>(table) + (offset << shift_amount)); |
| } |
| }; |
| |
| |
| class SCTableReference { |
| public: |
| static SCTableReference keyReference(StubCache::Table table) { |
| return SCTableReference( |
| reinterpret_cast<Address>(&first_entry(table)->key)); |
| } |
| |
| |
| static SCTableReference valueReference(StubCache::Table table) { |
| return SCTableReference( |
| reinterpret_cast<Address>(&first_entry(table)->value)); |
| } |
| |
| Address address() const { return address_; } |
| |
| private: |
| explicit SCTableReference(Address address) : address_(address) {} |
| |
| static StubCache::Entry* first_entry(StubCache::Table table) { |
| switch (table) { |
| case StubCache::kPrimary: return StubCache::primary_; |
| case StubCache::kSecondary: return StubCache::secondary_; |
| } |
| UNREACHABLE(); |
| return NULL; |
| } |
| |
| Address address_; |
| }; |
| |
| // ------------------------------------------------------------------------ |
| |
| |
| // Support functions for IC stubs for callbacks. |
| Object* LoadCallbackProperty(Arguments args); |
| Object* StoreCallbackProperty(Arguments args); |
| |
| |
| // Support functions for IC stubs for interceptors. |
| Object* LoadPropertyWithInterceptorOnly(Arguments args); |
| Object* LoadPropertyWithInterceptorForLoad(Arguments args); |
| Object* LoadPropertyWithInterceptorForCall(Arguments args); |
| Object* StoreInterceptorProperty(Arguments args); |
| Object* CallInterceptorProperty(Arguments args); |
| Object* KeyedLoadPropertyWithInterceptor(Arguments args); |
| |
| |
| // The stub compiler compiles stubs for the stub cache. |
| class StubCompiler BASE_EMBEDDED { |
| public: |
| enum CheckType { |
| RECEIVER_MAP_CHECK, |
| STRING_CHECK, |
| NUMBER_CHECK, |
| BOOLEAN_CHECK |
| }; |
| |
| StubCompiler() : scope_(), masm_(NULL, 256), failure_(NULL) { } |
| |
| Object* CompileCallInitialize(Code::Flags flags); |
| Object* CompileCallPreMonomorphic(Code::Flags flags); |
| Object* CompileCallNormal(Code::Flags flags); |
| Object* CompileCallMegamorphic(Code::Flags flags); |
| Object* CompileCallMiss(Code::Flags flags); |
| #ifdef ENABLE_DEBUGGER_SUPPORT |
| Object* CompileCallDebugBreak(Code::Flags flags); |
| Object* CompileCallDebugPrepareStepIn(Code::Flags flags); |
| #endif |
| |
| // Static functions for generating parts of stubs. |
| static void GenerateLoadGlobalFunctionPrototype(MacroAssembler* masm, |
| int index, |
| Register prototype); |
| |
| // Generates prototype loading code that uses the objects from the |
| // context we were in when this function was called. If the context |
| // has changed, a jump to miss is performed. This ties the generated |
| // code to a particular context and so must not be used in cases |
| // where the generated code is not allowed to have references to |
| // objects from a context. |
| static void GenerateDirectLoadGlobalFunctionPrototype(MacroAssembler* masm, |
| int index, |
| Register prototype, |
| Label* miss); |
| |
| static void GenerateFastPropertyLoad(MacroAssembler* masm, |
| Register dst, Register src, |
| JSObject* holder, int index); |
| |
| static void GenerateLoadArrayLength(MacroAssembler* masm, |
| Register receiver, |
| Register scratch, |
| Label* miss_label); |
| |
| static void GenerateLoadStringLength(MacroAssembler* masm, |
| Register receiver, |
| Register scratch1, |
| Register scratch2, |
| Label* miss_label); |
| |
| static void GenerateLoadFunctionPrototype(MacroAssembler* masm, |
| Register receiver, |
| Register scratch1, |
| Register scratch2, |
| Label* miss_label); |
| |
| static void GenerateStoreField(MacroAssembler* masm, |
| JSObject* object, |
| int index, |
| Map* transition, |
| Register receiver_reg, |
| Register name_reg, |
| Register scratch, |
| Label* miss_label); |
| |
| static void GenerateLoadMiss(MacroAssembler* masm, Code::Kind kind); |
| |
| // Generates code that verifies that the property holder has not changed |
| // (checking maps of objects in the prototype chain for fast and global |
| // objects or doing negative lookup for slow objects, ensures that the |
| // property cells for global objects are still empty) and checks that the map |
| // of the holder has not changed. If necessary the function also generates |
| // code for security check in case of global object holders. Helps to make |
| // sure that the current IC is still valid. |
| // |
| // The scratch and holder registers are always clobbered, but the object |
| // register is only clobbered if it the same as the holder register. The |
| // function returns a register containing the holder - either object_reg or |
| // holder_reg. |
| // The function can optionally (when save_at_depth != |
| // kInvalidProtoDepth) save the object at the given depth by moving |
| // it to [esp + kPointerSize]. |
| |
| Register CheckPrototypes(JSObject* object, |
| Register object_reg, |
| JSObject* holder, |
| Register holder_reg, |
| Register scratch1, |
| Register scratch2, |
| String* name, |
| Label* miss) { |
| return CheckPrototypes(object, object_reg, holder, holder_reg, scratch1, |
| scratch2, name, kInvalidProtoDepth, miss); |
| } |
| |
| Register CheckPrototypes(JSObject* object, |
| Register object_reg, |
| JSObject* holder, |
| Register holder_reg, |
| Register scratch1, |
| Register scratch2, |
| String* name, |
| int save_at_depth, |
| Label* miss); |
| |
| protected: |
| Object* GetCodeWithFlags(Code::Flags flags, const char* name); |
| Object* GetCodeWithFlags(Code::Flags flags, String* name); |
| |
| MacroAssembler* masm() { return &masm_; } |
| void set_failure(Failure* failure) { failure_ = failure; } |
| |
| void GenerateLoadField(JSObject* object, |
| JSObject* holder, |
| Register receiver, |
| Register scratch1, |
| Register scratch2, |
| Register scratch3, |
| int index, |
| String* name, |
| Label* miss); |
| |
| bool GenerateLoadCallback(JSObject* object, |
| JSObject* holder, |
| Register receiver, |
| Register name_reg, |
| Register scratch1, |
| Register scratch2, |
| Register scratch3, |
| AccessorInfo* callback, |
| String* name, |
| Label* miss, |
| Failure** failure); |
| |
| void GenerateLoadConstant(JSObject* object, |
| JSObject* holder, |
| Register receiver, |
| Register scratch1, |
| Register scratch2, |
| Register scratch3, |
| Object* value, |
| String* name, |
| Label* miss); |
| |
| void GenerateLoadInterceptor(JSObject* object, |
| JSObject* holder, |
| LookupResult* lookup, |
| Register receiver, |
| Register name_reg, |
| Register scratch1, |
| Register scratch2, |
| Register scratch3, |
| String* name, |
| Label* miss); |
| |
| static void LookupPostInterceptor(JSObject* holder, |
| String* name, |
| LookupResult* lookup); |
| |
| private: |
| HandleScope scope_; |
| MacroAssembler masm_; |
| Failure* failure_; |
| }; |
| |
| |
| class LoadStubCompiler: public StubCompiler { |
| public: |
| Object* CompileLoadNonexistent(String* name, |
| JSObject* object, |
| JSObject* last); |
| |
| Object* CompileLoadField(JSObject* object, |
| JSObject* holder, |
| int index, |
| String* name); |
| |
| Object* CompileLoadCallback(String* name, |
| JSObject* object, |
| JSObject* holder, |
| AccessorInfo* callback); |
| |
| Object* CompileLoadConstant(JSObject* object, |
| JSObject* holder, |
| Object* value, |
| String* name); |
| |
| Object* CompileLoadInterceptor(JSObject* object, |
| JSObject* holder, |
| String* name); |
| |
| Object* CompileLoadGlobal(JSObject* object, |
| GlobalObject* holder, |
| JSGlobalPropertyCell* cell, |
| String* name, |
| bool is_dont_delete); |
| |
| private: |
| Object* GetCode(PropertyType type, String* name); |
| }; |
| |
| |
| class KeyedLoadStubCompiler: public StubCompiler { |
| public: |
| Object* CompileLoadField(String* name, |
| JSObject* object, |
| JSObject* holder, |
| int index); |
| |
| Object* CompileLoadCallback(String* name, |
| JSObject* object, |
| JSObject* holder, |
| AccessorInfo* callback); |
| |
| Object* CompileLoadConstant(String* name, |
| JSObject* object, |
| JSObject* holder, |
| Object* value); |
| |
| Object* CompileLoadInterceptor(JSObject* object, |
| JSObject* holder, |
| String* name); |
| |
| Object* CompileLoadArrayLength(String* name); |
| Object* CompileLoadStringLength(String* name); |
| Object* CompileLoadFunctionPrototype(String* name); |
| |
| private: |
| Object* GetCode(PropertyType type, String* name); |
| }; |
| |
| |
| class StoreStubCompiler: public StubCompiler { |
| public: |
| Object* CompileStoreField(JSObject* object, |
| int index, |
| Map* transition, |
| String* name); |
| Object* CompileStoreCallback(JSObject* object, |
| AccessorInfo* callbacks, |
| String* name); |
| Object* CompileStoreInterceptor(JSObject* object, String* name); |
| Object* CompileStoreGlobal(GlobalObject* object, |
| JSGlobalPropertyCell* holder, |
| String* name); |
| |
| |
| private: |
| Object* GetCode(PropertyType type, String* name); |
| }; |
| |
| |
| class KeyedStoreStubCompiler: public StubCompiler { |
| public: |
| Object* CompileStoreField(JSObject* object, |
| int index, |
| Map* transition, |
| String* name); |
| |
| private: |
| Object* GetCode(PropertyType type, String* name); |
| }; |
| |
| |
| // List of functions with custom constant call IC stubs. |
| // |
| // Installation of custom call generators for the selected builtins is |
| // handled by the bootstrapper. |
| // |
| // Each entry has a name of a global object property holding an object |
| // optionally followed by ".prototype" (this controls whether the |
| // generator is set on the object itself or, in case it's a function, |
| // on the its instance prototype), a name of a builtin function on the |
| // object (the one the generator is set for), and a name of the |
| // generator (used to build ids and generator function names). |
| #define CUSTOM_CALL_IC_GENERATORS(V) \ |
| V(Array.prototype, push, ArrayPush) \ |
| V(Array.prototype, pop, ArrayPop) \ |
| V(String.prototype, charCodeAt, StringCharCodeAt) \ |
| V(String.prototype, charAt, StringCharAt) \ |
| V(String, fromCharCode, StringFromCharCode) \ |
| V(Math, floor, MathFloor) \ |
| V(Math, abs, MathAbs) |
| |
| |
| class CallStubCompiler: public StubCompiler { |
| public: |
| enum { |
| #define DECLARE_CALL_GENERATOR_ID(ignored1, ignore2, name) \ |
| k##name##CallGenerator, |
| CUSTOM_CALL_IC_GENERATORS(DECLARE_CALL_GENERATOR_ID) |
| #undef DECLARE_CALL_GENERATOR_ID |
| kNumCallGenerators |
| }; |
| |
| CallStubCompiler(int argc, |
| InLoopFlag in_loop, |
| Code::Kind kind, |
| InlineCacheHolderFlag cache_holder); |
| |
| Object* CompileCallField(JSObject* object, |
| JSObject* holder, |
| int index, |
| String* name); |
| Object* CompileCallConstant(Object* object, |
| JSObject* holder, |
| JSFunction* function, |
| String* name, |
| CheckType check); |
| Object* CompileCallInterceptor(JSObject* object, |
| JSObject* holder, |
| String* name); |
| Object* CompileCallGlobal(JSObject* object, |
| GlobalObject* holder, |
| JSGlobalPropertyCell* cell, |
| JSFunction* function, |
| String* name); |
| |
| // Compiles a custom call constant/global IC using the generator |
| // with given id. For constant calls cell is NULL. |
| Object* CompileCustomCall(int generator_id, |
| Object* object, |
| JSObject* holder, |
| JSGlobalPropertyCell* cell, |
| JSFunction* function, |
| String* name); |
| |
| #define DECLARE_CALL_GENERATOR(ignored1, ignored2, name) \ |
| Object* Compile##name##Call(Object* object, \ |
| JSObject* holder, \ |
| JSGlobalPropertyCell* cell, \ |
| JSFunction* function, \ |
| String* fname); |
| CUSTOM_CALL_IC_GENERATORS(DECLARE_CALL_GENERATOR) |
| #undef DECLARE_CALL_GENERATOR |
| |
| private: |
| const ParameterCount arguments_; |
| const InLoopFlag in_loop_; |
| const Code::Kind kind_; |
| const InlineCacheHolderFlag cache_holder_; |
| |
| const ParameterCount& arguments() { return arguments_; } |
| |
| Object* GetCode(PropertyType type, String* name); |
| |
| // Convenience function. Calls GetCode above passing |
| // CONSTANT_FUNCTION type and the name of the given function. |
| Object* GetCode(JSFunction* function); |
| |
| void GenerateNameCheck(String* name, Label* miss); |
| |
| void GenerateGlobalReceiverCheck(JSObject* object, |
| JSObject* holder, |
| String* name, |
| Label* miss); |
| |
| // Generates code to load the function from the cell checking that |
| // it still contains the same function. |
| void GenerateLoadFunctionFromCell(JSGlobalPropertyCell* cell, |
| JSFunction* function, |
| Label* miss); |
| |
| // Generates a jump to CallIC miss stub. Returns Failure if the jump cannot |
| // be generated. |
| Object* GenerateMissBranch(); |
| }; |
| |
| |
| class ConstructStubCompiler: public StubCompiler { |
| public: |
| explicit ConstructStubCompiler() {} |
| |
| Object* CompileConstructStub(SharedFunctionInfo* shared); |
| |
| private: |
| Object* GetCode(); |
| }; |
| |
| |
| // Holds information about possible function call optimizations. |
| class CallOptimization BASE_EMBEDDED { |
| public: |
| explicit CallOptimization(LookupResult* lookup); |
| |
| explicit CallOptimization(JSFunction* function); |
| |
| bool is_constant_call() const { |
| return constant_function_ != NULL; |
| } |
| |
| JSFunction* constant_function() const { |
| ASSERT(constant_function_ != NULL); |
| return constant_function_; |
| } |
| |
| bool is_simple_api_call() const { |
| return is_simple_api_call_; |
| } |
| |
| FunctionTemplateInfo* expected_receiver_type() const { |
| ASSERT(is_simple_api_call_); |
| return expected_receiver_type_; |
| } |
| |
| CallHandlerInfo* api_call_info() const { |
| ASSERT(is_simple_api_call_); |
| return api_call_info_; |
| } |
| |
| // Returns the depth of the object having the expected type in the |
| // prototype chain between the two arguments. |
| int GetPrototypeDepthOfExpectedType(JSObject* object, |
| JSObject* holder) const; |
| |
| private: |
| void Initialize(JSFunction* function); |
| |
| // Determines whether the given function can be called using the |
| // fast api call builtin. |
| void AnalyzePossibleApiFunction(JSFunction* function); |
| |
| JSFunction* constant_function_; |
| bool is_simple_api_call_; |
| FunctionTemplateInfo* expected_receiver_type_; |
| CallHandlerInfo* api_call_info_; |
| }; |
| |
| } } // namespace v8::internal |
| |
| #endif // V8_STUB_CACHE_H_ |
