New approach to Crankshaft decision-making

src/x64/code-stubs-x64.cc

 // 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 72 matching lines @@
   // write barrier because the allocated object is in new space.
   __ LoadRoot(rbx, Heap::kEmptyFixedArrayRootIndex);
   __ LoadRoot(rcx, Heap::kTheHoleValueRootIndex);
   __ LoadRoot(rdi, Heap::kUndefinedValueRootIndex);
   __ movq(FieldOperand(rax, JSObject::kPropertiesOffset), rbx);
   __ movq(FieldOperand(rax, JSObject::kElementsOffset), rbx);
   __ movq(FieldOperand(rax, JSFunction::kPrototypeOrInitialMapOffset), rcx);
   __ movq(FieldOperand(rax, JSFunction::kSharedFunctionInfoOffset), rdx);
   __ movq(FieldOperand(rax, JSFunction::kContextOffset), rsi);
   __ movq(FieldOperand(rax, JSFunction::kLiteralsOffset), rbx);
+  __ movq(FieldOperand(rax, JSFunction::kProfilerTicksOffset), Immediate(0));
   __ movq(FieldOperand(rax, JSFunction::kNextFunctionLinkOffset), rdi);
 
   // Initialize the code pointer in the function to be the one
   // found in the shared function info object.
   __ movq(rdx, FieldOperand(rdx, SharedFunctionInfo::kCodeOffset));
   __ lea(rdx, FieldOperand(rdx, Code::kHeaderSize));
   __ movq(FieldOperand(rax, JSFunction::kCodeEntryOffset), rdx);
 
 
   // Return and remove the on-stack parameter.
@@ skipping 5990 matching lines @@
                                  xmm0,
                                  &slow_elements);
   __ ret(0);
 }
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_X64