src/v8/src/ic/handler-compiler.h

   1 // Copyright 2014 the V8 project authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef V8_IC_HANDLER_COMPILER_H_
   6 #define V8_IC_HANDLER_COMPILER_H_
   7
   8 #include "src/ic/access-compiler.h"
   9 #include "src/ic/ic-state.h"
  10
  11 namespace v8 {
  12 namespace internal {
  13
  14 class CallOptimization;
  15
  16 enum PrototypeCheckType { CHECK_ALL_MAPS, SKIP_RECEIVER };
  17
  18 class PropertyHandlerCompiler : public PropertyAccessCompiler {
  19  public:
  20   static Handle<Code> Find(Handle<Name> name, Handle<Map> map, Code::Kind kind,
  21                            CacheHolderFlag cache_holder, Code::StubType type);
  22
  23  protected:
  24   PropertyHandlerCompiler(Isolate* isolate, Code::Kind kind,
  25                           Handle<HeapType> type, Handle<JSObject> holder,
  26                           CacheHolderFlag cache_holder)
  27       : PropertyAccessCompiler(isolate, kind, cache_holder),
  28         type_(type),
  29         holder_(holder) {}
  30
  31   virtual ~PropertyHandlerCompiler() {}
  32
  33   virtual Register FrontendHeader(Register object_reg, Handle<Name> name,
  34                                   Label* miss) {
  35     UNREACHABLE();
  36     return receiver();
  37   }
  38
  39   virtual void FrontendFooter(Handle<Name> name, Label* miss) { UNREACHABLE(); }
  40
  41   Register Frontend(Register object_reg, Handle<Name> name);
  42   void NonexistentFrontendHeader(Handle<Name> name, Label* miss,
  43                                  Register scratch1, Register scratch2);
  44
  45   // TODO(verwaest): Make non-static.
  46   static void GenerateFastApiCall(MacroAssembler* masm,
  47                                   const CallOptimization& optimization,
  48                                   Handle<Map> receiver_map, Register receiver,
  49                                   Register scratch, bool is_store, int argc,
  50                                   Register* values);
  51
  52   // Helper function used to check that the dictionary doesn't contain
  53   // the property. This function may return false negatives, so miss_label
  54   // must always call a backup property check that is complete.
  55   // This function is safe to call if the receiver has fast properties.
  56   // Name must be unique and receiver must be a heap object.
  57   static void GenerateDictionaryNegativeLookup(MacroAssembler* masm,
  58                                                Label* miss_label,
  59                                                Register receiver,
  60                                                Handle<Name> name, Register r0,
  61                                                Register r1);
  62
  63   // Generate code to check that a global property cell is empty. Create
  64   // the property cell at compilation time if no cell exists for the
  65   // property.
  66   static void GenerateCheckPropertyCell(MacroAssembler* masm,
  67                                         Handle<JSGlobalObject> global,
  68                                         Handle<Name> name, Register scratch,
  69                                         Label* miss);
  70
  71   // Generates code that verifies that the property holder has not changed
  72   // (checking maps of objects in the prototype chain for fast and global
  73   // objects or doing negative lookup for slow objects, ensures that the
  74   // property cells for global objects are still empty) and checks that the map
  75   // of the holder has not changed. If necessary the function also generates
  76   // code for security check in case of global object holders. Helps to make
  77   // sure that the current IC is still valid.
  78   //
  79   // The scratch and holder registers are always clobbered, but the object
  80   // register is only clobbered if it the same as the holder register. The
  81   // function returns a register containing the holder - either object_reg or
  82   // holder_reg.
  83   Register CheckPrototypes(Register object_reg, Register holder_reg,
  84                            Register scratch1, Register scratch2,
  85                            Handle<Name> name, Label* miss,
  86                            PrototypeCheckType check = CHECK_ALL_MAPS);
  87
  88   Handle<Code> GetCode(Code::Kind kind, Code::StubType type, Handle<Name> name);
  89   void set_type_for_object(Handle<Object> object);
  90   void set_holder(Handle<JSObject> holder) { holder_ = holder; }
  91   Handle<HeapType> type() const { return type_; }
  92   Handle<JSObject> holder() const { return holder_; }
  93
  94  private:
  95   Handle<HeapType> type_;
  96   Handle<JSObject> holder_;
  97 };
  98
  99
 100 class NamedLoadHandlerCompiler : public PropertyHandlerCompiler {
 101  public:
 102   NamedLoadHandlerCompiler(Isolate* isolate, Handle<HeapType> type,
 103                            Handle<JSObject> holder,
 104                            CacheHolderFlag cache_holder)
 105       : PropertyHandlerCompiler(isolate, Code::LOAD_IC, type, holder,
 106                                 cache_holder) {}
 107
 108   virtual ~NamedLoadHandlerCompiler() {}
 109
 110   Handle<Code> CompileLoadField(Handle<Name> name, FieldIndex index);
 111
 112   Handle<Code> CompileLoadCallback(Handle<Name> name,
 113                                    Handle<ExecutableAccessorInfo> callback);
 114
 115   Handle<Code> CompileLoadCallback(Handle<Name> name,
 116                                    const CallOptimization& call_optimization);
 117
 118   Handle<Code> CompileLoadConstant(Handle<Name> name, int constant_index);
 119
 120   // The LookupIterator is used to perform a lookup behind the interceptor. If
 121   // the iterator points to a LookupIterator::PROPERTY, its access will be
 122   // inlined.
 123   Handle<Code> CompileLoadInterceptor(LookupIterator* it);
 124
 125   Handle<Code> CompileLoadViaGetter(Handle<Name> name,
 126                                     Handle<JSFunction> getter);
 127
 128   Handle<Code> CompileLoadGlobal(Handle<PropertyCell> cell, Handle<Name> name,
 129                                  bool is_configurable);
 130
 131   // Static interface
 132   static Handle<Code> ComputeLoadNonexistent(Handle<Name> name,
 133                                              Handle<HeapType> type);
 134
 135   static void GenerateLoadViaGetter(MacroAssembler* masm, Handle<HeapType> type,
 136                                     Register receiver,
 137                                     Handle<JSFunction> getter);
 138
 139   static void GenerateLoadViaGetterForDeopt(MacroAssembler* masm) {
 140     GenerateLoadViaGetter(masm, Handle<HeapType>::null(), no_reg,
 141                           Handle<JSFunction>());
 142   }
 143
 144   static void GenerateLoadFunctionPrototype(MacroAssembler* masm,
 145                                             Register receiver,
 146                                             Register scratch1,
 147                                             Register scratch2,
 148                                             Label* miss_label);
 149
 150   // These constants describe the structure of the interceptor arguments on the
 151   // stack. The arguments are pushed by the (platform-specific)
 152   // PushInterceptorArguments and read by LoadPropertyWithInterceptorOnly and
 153   // LoadWithInterceptor.
 154   static const int kInterceptorArgsNameIndex = 0;
 155   static const int kInterceptorArgsInfoIndex = 1;
 156   static const int kInterceptorArgsThisIndex = 2;
 157   static const int kInterceptorArgsHolderIndex = 3;
 158   static const int kInterceptorArgsLength = 4;
 159
 160  protected:
 161   virtual Register FrontendHeader(Register object_reg, Handle<Name> name,
 162                                   Label* miss);
 163
 164   virtual void FrontendFooter(Handle<Name> name, Label* miss);
 165
 166  private:
 167   Handle<Code> CompileLoadNonexistent(Handle<Name> name);
 168   void GenerateLoadConstant(Handle<Object> value);
 169   void GenerateLoadCallback(Register reg,
 170                             Handle<ExecutableAccessorInfo> callback);
 171   void GenerateLoadCallback(const CallOptimization& call_optimization,
 172                             Handle<Map> receiver_map);
 173   void GenerateLoadInterceptor(Register holder_reg);
 174   void GenerateLoadInterceptorWithFollowup(LookupIterator* it,
 175                                            Register holder_reg);
 176   void GenerateLoadPostInterceptor(LookupIterator* it, Register reg);
 177
 178   // Generates prototype loading code that uses the objects from the
 179   // context we were in when this function was called. If the context
 180   // has changed, a jump to miss is performed. This ties the generated
 181   // code to a particular context and so must not be used in cases
 182   // where the generated code is not allowed to have references to
 183   // objects from a context.
 184   static void GenerateDirectLoadGlobalFunctionPrototype(MacroAssembler* masm,
 185                                                         int index,
 186                                                         Register prototype,
 187                                                         Label* miss);
 188
 189
 190   Register scratch4() { return registers_[5]; }
 191 };
 192
 193
 194 class NamedStoreHandlerCompiler : public PropertyHandlerCompiler {
 195  public:
 196   explicit NamedStoreHandlerCompiler(Isolate* isolate, Handle<HeapType> type,
 197                                      Handle<JSObject> holder)
 198       : PropertyHandlerCompiler(isolate, Code::STORE_IC, type, holder,
 199                                 kCacheOnReceiver) {}
 200
 201   virtual ~NamedStoreHandlerCompiler() {}
 202
 203   Handle<Code> CompileStoreTransition(Handle<Map> transition,
 204                                       Handle<Name> name);
 205   Handle<Code> CompileStoreField(LookupIterator* it);
 206   Handle<Code> CompileStoreCallback(Handle<JSObject> object, Handle<Name> name,
 207                                     Handle<ExecutableAccessorInfo> callback);
 208   Handle<Code> CompileStoreCallback(Handle<JSObject> object, Handle<Name> name,
 209                                     const CallOptimization& call_optimization);
 210   Handle<Code> CompileStoreViaSetter(Handle<JSObject> object, Handle<Name> name,
 211                                      Handle<JSFunction> setter);
 212   Handle<Code> CompileStoreInterceptor(Handle<Name> name);
 213
 214   static void GenerateStoreViaSetter(MacroAssembler* masm,
 215                                      Handle<HeapType> type, Register receiver,
 216                                      Handle<JSFunction> setter);
 217
 218   static void GenerateStoreViaSetterForDeopt(MacroAssembler* masm) {
 219     GenerateStoreViaSetter(masm, Handle<HeapType>::null(), no_reg,
 220                            Handle<JSFunction>());
 221   }
 222
 223   static void GenerateSlow(MacroAssembler* masm);
 224
 225  protected:
 226   virtual Register FrontendHeader(Register object_reg, Handle<Name> name,
 227                                   Label* miss);
 228
 229   virtual void FrontendFooter(Handle<Name> name, Label* miss);
 230   void GenerateRestoreName(Label* label, Handle<Name> name);
 231
 232  private:
 233   void GenerateStoreTransition(Handle<Map> transition, Handle<Name> name,
 234                                Register receiver_reg, Register name_reg,
 235                                Register value_reg, Register scratch1,
 236                                Register scratch2, Register scratch3,
 237                                Label* miss_label, Label* slow);
 238
 239   void GenerateStoreField(LookupIterator* lookup, Register value_reg,
 240                           Label* miss_label);
 241
 242   static Builtins::Name SlowBuiltin(Code::Kind kind) {
 243     switch (kind) {
 244       case Code::STORE_IC:
 245         return Builtins::kStoreIC_Slow;
 246       case Code::KEYED_STORE_IC:
 247         return Builtins::kKeyedStoreIC_Slow;
 248       default:
 249         UNREACHABLE();
 250     }
 251     return Builtins::kStoreIC_Slow;
 252   }
 253
 254   static Register value();
 255 };
 256
 257
 258 class ElementHandlerCompiler : public PropertyHandlerCompiler {
 259  public:
 260   explicit ElementHandlerCompiler(Isolate* isolate)
 261       : PropertyHandlerCompiler(isolate, Code::KEYED_LOAD_IC,
 262                                 Handle<HeapType>::null(),
 263                                 Handle<JSObject>::null(), kCacheOnReceiver) {}
 264
 265   virtual ~ElementHandlerCompiler() {}
 266
 267   void CompileElementHandlers(MapHandleList* receiver_maps,
 268                               CodeHandleList* handlers);
 269
 270   static void GenerateStoreSlow(MacroAssembler* masm);
 271 };
 272 }
 273 }  // namespace v8::internal
 274
 275 #endif  // V8_IC_HANDLER_COMPILER_H_