Don't inline functions above the deoptimization threshold.

runtime/vm/deopt_instructions.cc

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/deopt_instructions.h"
 
 #include "vm/assembler_macros.h"
 #include "vm/intermediate_language.h"
 #include "vm/locations.h"
 #include "vm/parser.h"
@@ skipping 403 matching lines @@
 
   void Execute(DeoptimizationContext* deopt_context, intptr_t to_index) {
     Function& function = Function::Handle(deopt_context->isolate());
     function ^= deopt_context->ObjectAt(object_table_index_);
     const Code& code =
         Code::Handle(deopt_context->isolate(), function.unoptimized_code());
     intptr_t pc_marker = code.EntryPoint() +
                          AssemblerMacros::kOffsetOfSavedPCfromEntrypoint;
     intptr_t* to_addr = deopt_context->GetToFrameAddressAt(to_index);
     *to_addr = pc_marker;
+    // Increment the deoptimization counter. This effectively increments each
+    // function occurring in the optimized frame.
+    function.set_deoptimization_counter(function.deoptimization_counter() + 1);
+    // Clear invocation counter so that the function gets optimized only after

[Kevin Millikin (Google), 2012/10/04 11:37:59]

Comment should say 'reoptimized'.  Maybe we should say 'hopefully' in there
somewhere :)

[zerny-google, 2012/10/04 12:18:41]

Done. :)

+    // more feedback has been collected.
+    function.set_usage_counter(0);
+    if (function.HasOptimizedCode()) function.SwitchToUnoptimizedCode();
   }
 
  private:
   intptr_t object_table_index_;
 
   DISALLOW_COPY_AND_ASSIGN(DeoptPcMarkerInstr);
 };
 
 
 // Deoptimization instruction copying the caller saved FP from optimized frame.
@@ skipping 198 matching lines @@
                           Smi* offset,
                           DeoptInfo* info,
                           Smi* reason) {
   intptr_t i = index * kEntrySize;
   *offset ^= table.At(i);
   *info ^= table.At(i + 1);
   *reason ^= table.At(i + 2);
 }
 
 }  // namespace dart