Add a deoptimization count to each function to limit number of re-compilations.

src/runtime.cc

Index: src/runtime.cc
===================================================================
--- src/runtime.cc	(revision 10399)
+++ src/runtime.cc	(working copy)
@@ -8464,6 +8464,9 @@
       PrintF("]\n");
     }
     function->ReplaceCode(function->shared()->code());
+
+    // Limit the number of times we re-compile a functions after deoptimization.
+    function->shared()->IncrementAndCheckDeoptCount();
   } else {
     Deoptimizer::DeoptimizeFunction(*function);
   }
@@ -8526,11 +8529,11 @@
 }
 
 
-RUNTIME_FUNCTION(MaybeObject*, Runtime_GetOptimizationCount) {
+RUNTIME_FUNCTION(MaybeObject*, Runtime_GetDeoptimizationCount) {
   HandleScope scope(isolate);
   ASSERT(args.length() == 1);
   CONVERT_ARG_CHECKED(JSFunction, function, 0);
-  return Smi::FromInt(function->shared()->opt_count());
+  return Smi::FromInt(function->shared()->deopt_count());
 }