Cache IC handlers on the prototype's map if possible

src/globals.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_GLOBALS_H_
 #define V8_GLOBALS_H_
 
 #include "include/v8stdint.h"
 
 #include "src/base/build_config.h"
@@ skipping 402 matching lines @@
 
 
 // State for inline cache call sites. Aliased as IC::State.
 enum InlineCacheState {
   // Has never been executed.
   UNINITIALIZED,
   // Has been executed but monomorhic state has been delayed.
   PREMONOMORPHIC,
   // Has been executed and only one receiver type has been seen.
   MONOMORPHIC,
-  // Like MONOMORPHIC but check failed due to prototype.
-  MONOMORPHIC_PROTOTYPE_FAILURE,
+  // Check failed due to prototype (or map deprecation).
+  PROTOTYPE_FAILURE,
   // Multiple receiver types have been seen.
   POLYMORPHIC,
   // Many receiver types have been seen.
   MEGAMORPHIC,
   // A generic handler is installed and no extra typefeedback is recorded.
   GENERIC,
   // Special state for debug break or step in prepare stubs.
   DEBUG_STUB
 };
 
 
 enum CallFunctionFlags {
   NO_CALL_FUNCTION_FLAGS,
   CALL_AS_METHOD,
   // Always wrap the receiver and call to the JSFunction. Only use this flag
   // both the receiver type and the target method are statically known.
   WRAP_AND_CALL
 };
 
 
 enum CallConstructorFlags {
   NO_CALL_CONSTRUCTOR_FLAGS,
   // The call target is cached in the instruction stream.
   RECORD_CONSTRUCTOR_TARGET
 };
 
 
-enum InlineCacheHolderFlag {
-  OWN_MAP,  // For fast properties objects.
-  PROTOTYPE_MAP  // For slow properties objects (except GlobalObjects).
+enum CacheHolderFlag {
+  kCacheOnPrototype,
+  kCacheOnPrototypeReceiverIsDictionary,
+  kCacheOnPrototypeReceiverIsPrimitive,
+  kCacheOnReceiver
 };
 
 
 // The Store Buffer (GC).
 typedef enum {
   kStoreBufferFullEvent,
   kStoreBufferStartScanningPagesEvent,
   kStoreBufferScanningPageEvent
 } StoreBufferEvent;
 
@@ skipping 260 matching lines @@
 enum MinusZeroMode {
   TREAT_MINUS_ZERO_AS_ZERO,
   FAIL_ON_MINUS_ZERO
 };
 
 } }  // namespace v8::internal
 
 namespace i = v8::internal;
 
 #endif  // V8_GLOBALS_H_