Count-based profiling for primitive functions (hidden behind a flag)

src/compiler.h

Index: src/compiler.h
diff --git a/src/compiler.h b/src/compiler.h
index 47eaeea3bcbe9231ae1cee1ae97a9085dc5034d8..38252871eabfd112b1f4ce8702cb69d34382beef 100644
--- a/src/compiler.h
+++ b/src/compiler.h
@@ -168,6 +168,9 @@ class CompilationInfo BASE_EMBEDDED {
     return V8::UseCrankshaft() && !closure_.is_null();
   }
 
+  // Determines whether or not to insert a self-optimization header.
+  bool ShouldSelfOptimize();
+
   // Disable all optimization attempts of this info for the rest of the
   // current compilation pipeline.
   void AbortOptimization();
@@ -280,6 +283,9 @@ class Compiler : public AllStatic {
 
   static const int kMaxInliningLevels = 3;
 
+  // Call count before primitive functions trigger their own optimization.
+  static const int kCallsUntilPrimitiveOpt = 200;
+
   // All routines return a SharedFunctionInfo.
   // If an error occurs an exception is raised and the return handle
   // contains NULL.