New approach to Crankshaft decision-making

src/objects.h

Index: src/objects.h
diff --git a/src/objects.h b/src/objects.h
index 5af771828999fc9b9a0370c6e2736e298f93c019..a65d9ac45e8a2d164056ed86ec76c232dc483f38 100644
--- a/src/objects.h
+++ b/src/objects.h
@@ -4994,6 +4994,9 @@ class SharedFunctionInfo: public HeapObject {
   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,
@@ -5154,6 +5157,13 @@ class SharedFunctionInfo: public HeapObject {
   // 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;
@@ -5171,8 +5181,10 @@ class SharedFunctionInfo: public HeapObject {
       kInferredNameOffset + kPointerSize;
   static const int kThisPropertyAssignmentsOffset =
       kInitialMapOffset + kPointerSize;
-  static const int kDeoptCounterOffset =
+  static const int kCallCounterOffset =
       kThisPropertyAssignmentsOffset + kPointerSize;
+  static const int kDeoptCounterOffset =
+      kCallCounterOffset + kPointerSize;
 #if V8_HOST_ARCH_32_BIT
   // Smi fields.
   static const int kLengthOffset =
@@ -5461,6 +5473,9 @@ class JSFunction: public JSObject {
   // 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);
@@ -5500,7 +5515,9 @@ class JSFunction: public JSObject {
       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;