Classify small functions platform-dependently.

src/runtime-profiler.cc

Index: src/runtime-profiler.cc
diff --git a/src/runtime-profiler.cc b/src/runtime-profiler.cc
index 1856359f764143c686fd8d68a10ac83ebf03f4b9..e0e981271205b5016b9d56eb4b57b8c29c505012 100644
--- a/src/runtime-profiler.cc
+++ b/src/runtime-profiler.cc
@@ -34,6 +34,7 @@
 #include "compilation-cache.h"
 #include "deoptimizer.h"
 #include "execution.h"
+#include "full-codegen.h"
 #include "global-handles.h"
 #include "isolate-inl.h"
 #include "mark-compact.h"
@@ -81,7 +82,8 @@ STATIC_ASSERT(kTicksWhenNotEnoughTypeInfo < 256);
 
 // Maximum size in bytes of generated code for a function to be optimized
 // the very first time it is seen on the stack.
-static const int kMaxSizeEarlyOpt = 500;
+static const int kMaxSizeEarlyOpt =
+    5 * FullCodeGenerator::kBackEdgeDistanceUnit;
 
 
 Atomic32 RuntimeProfiler::state_ = 0;
@@ -317,8 +319,6 @@ void RuntimeProfiler::OptimizeNow() {
     }
     if (!function->IsOptimizable()) continue;
 
-
-
     if (FLAG_watch_ic_patching) {
       int ticks = shared_code->profiler_ticks();
 
@@ -341,7 +341,7 @@ void RuntimeProfiler::OptimizeNow() {
           }
         }
       } else if (!any_ic_changed_ &&
-          shared_code->instruction_size() < kMaxSizeEarlyOpt) {
+                 shared_code->instruction_size() < kMaxSizeEarlyOpt) {
         // If no IC was patched since the last tick and this function is very
         // small, optimistically optimize it now.
         Optimize(function, "small function");