New approach to Crankshaft decision-making

src/objects.h

 // Copyright 2011 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
@@ skipping 4976 matching lines @@
   // Bit field containing various information collected by the compiler to
   // drive optimization.
   inline int compiler_hints();
   inline void set_compiler_hints(int value);
 
   // A counter used to determine when to stress the deoptimizer with a
   // deopt.
   inline Smi* deopt_counter();
   inline void set_deopt_counter(Smi* counter);
 
+  inline int call_counter();
+  inline void set_call_counter(int count);
+
   // Add information on assignments of the form this.x = ...;
   void SetThisPropertyAssignmentsInfo(
       bool has_only_simple_this_property_assignments,
       FixedArray* this_property_assignments);
 
   // Clear information on assignments of the form this.x = ...;
   void ClearThisPropertyAssignmentsInfo();
 
   // Indicate that this function only consists of assignments of the form
   // this.x = y; where y is either a constant or refers to an argument.
@@ skipping 140 matching lines @@
                              ClearExceptionFlag flag);
   static bool CompileLazy(Handle<SharedFunctionInfo> shared,
                           ClearExceptionFlag flag);
 
   // Casting.
   static inline SharedFunctionInfo* cast(Object* obj);
 
   // Constants.
   static const int kDontAdaptArgumentsSentinel = -1;
 
+  // Number of calls until a "primitive" function triggers its own optimization.
+#if defined(V8_TARGET_ARCH_IA32) || defined(V8_TARGET_ARCH_X64)
+  static const int kCallsUntilPrimitiveOptimization = 20000;
+#elif defined(V8_TARGET_ARCH_ARM) || defined(V8_TARGET_ARCH_MIPS)
+  static const int kCallsUntilPrimitiveOptimization = 1000;
+#endif
+
   // Layout description.
   // Pointer fields.
   static const int kNameOffset = HeapObject::kHeaderSize;
   static const int kCodeOffset = kNameOffset + kPointerSize;
   static const int kScopeInfoOffset = kCodeOffset + kPointerSize;
   static const int kConstructStubOffset = kScopeInfoOffset + kPointerSize;
   static const int kInstanceClassNameOffset =
       kConstructStubOffset + kPointerSize;
   static const int kFunctionDataOffset =
       kInstanceClassNameOffset + kPointerSize;
   static const int kScriptOffset = kFunctionDataOffset + kPointerSize;
   static const int kDebugInfoOffset = kScriptOffset + kPointerSize;
   static const int kInferredNameOffset = kDebugInfoOffset + kPointerSize;
   static const int kInitialMapOffset =
       kInferredNameOffset + kPointerSize;
   static const int kThisPropertyAssignmentsOffset =
       kInitialMapOffset + kPointerSize;
+  static const int kCallCounterOffset =
+      kThisPropertyAssignmentsOffset + kPointerSize;
   static const int kDeoptCounterOffset =
-      kThisPropertyAssignmentsOffset + kPointerSize;
+      kCallCounterOffset + kPointerSize;
 #if V8_HOST_ARCH_32_BIT
   // Smi fields.
   static const int kLengthOffset =
       kDeoptCounterOffset + kPointerSize;
   static const int kFormalParameterCountOffset = kLengthOffset + kPointerSize;
   static const int kExpectedNofPropertiesOffset =
       kFormalParameterCountOffset + kPointerSize;
   static const int kNumLiteralsOffset =
       kExpectedNofPropertiesOffset + kPointerSize;
   static const int kStartPositionAndTypeOffset =
@@ skipping 268 matching lines @@
   // before.
   Object* SetInstanceClassName(String* name);
 
   // Returns if this function has been compiled to native code yet.
   inline bool is_compiled();
 
   // [next_function_link]: Field for linking functions. This list is treated as
   // a weak list by the GC.
   DECL_ACCESSORS(next_function_link, Object)
 
+  inline int profiler_ticks();
+  inline void set_profiler_ticks(int ticks);
+
   // Prints the name of the function using PrintF.
   inline void PrintName() {
     PrintName(stdout);
   }
   void PrintName(FILE* out);
 
   // Casting.
   static inline JSFunction* cast(Object* obj);
 
   // Iterates the objects, including code objects indirectly referenced
@@ skipping 19 matching lines @@
 
   // Layout descriptors. The last property (from kNonWeakFieldsEndOffset to
   // kSize) is weak and has special handling during garbage collection.
   static const int kCodeEntryOffset = JSObject::kHeaderSize;
   static const int kPrototypeOrInitialMapOffset =
       kCodeEntryOffset + kPointerSize;
   static const int kSharedFunctionInfoOffset =
       kPrototypeOrInitialMapOffset + kPointerSize;
   static const int kContextOffset = kSharedFunctionInfoOffset + kPointerSize;
   static const int kLiteralsOffset = kContextOffset + kPointerSize;
-  static const int kNonWeakFieldsEndOffset = kLiteralsOffset + kPointerSize;
+  static const int kProfilerTicksOffset = kLiteralsOffset + kPointerSize;
+  static const int kNonWeakFieldsEndOffset =
+      kProfilerTicksOffset + kPointerSize;
   static const int kNextFunctionLinkOffset = kNonWeakFieldsEndOffset;
   static const int kSize = kNextFunctionLinkOffset + kPointerSize;
 
   // Layout of the literals array.
   static const int kLiteralsPrefixSize = 1;
   static const int kLiteralGlobalContextIndex = 0;
 
   // Layout of the bound-function binding array.
   static const int kBoundFunctionIndex = 0;
   static const int kBoundThisIndex = 1;
@@ skipping 2469 matching lines @@
     } else {
       value &= ~(1 << bit_position);
     }
     return value;
   }
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_H_