Count ICs that have type information.

src/runtime-profiler.cc

Index: src/runtime-profiler.cc
diff --git a/src/runtime-profiler.cc b/src/runtime-profiler.cc
index 7c24ae6adcb9b3a4b4f270f4f758eed12d83eb5a..dcca30ba7ee2dda8caf5fbe782dadb795b7852a9 100644
--- a/src/runtime-profiler.cc
+++ b/src/runtime-profiler.cc
@@ -109,6 +109,10 @@ void RuntimeProfiler::Optimize(JSFunction* function, const char* reason) {
     function->PrintName();
     PrintF(" 0x%" V8PRIxPTR, reinterpret_cast<intptr_t>(function->address()));
     PrintF(" for recompilation, reason: %s", reason);
+    int typeinfo = function->shared()->ic_typeinfo_count();
+    int total = function->shared()->ic_total_count();
+    PrintF(", ICs with typeinfo: %d/%d (%d%%)",

[Vyacheslav Egorov (Chromium), 2012/02/15 12:07:39]

I sense SIGFPE here for code objects without ICs.

[Jakob Kummerow, 2012/02/17 16:07:52]

Done.

+           typeinfo, total, (100*typeinfo/total));
     PrintF("]\n");
   }
 
@@ -258,9 +262,21 @@ void RuntimeProfiler::OptimizeNow() {
       int ticks = function->shared()->profiler_ticks();
 
       if (ticks >= kProfilerTicksBeforeOptimization) {
-        // If this particular function hasn't had any ICs patched for enough
-        // ticks, optimize it now.
-        Optimize(function, "hot and stable");
+        int ic_typeinfo = function->shared()->ic_typeinfo_count();

[Vyacheslav Egorov (Chromium), 2012/02/15 12:07:39]

I would rename ic_typeinfo_count into ic_with_typeinfo_count

[Jakob Kummerow, 2012/02/17 16:07:52]

Done.

+        int ic_total = function->shared()->ic_total_count();
+        int percentage = 100 * ic_typeinfo / ic_total;

[Vyacheslav Egorov (Chromium), 2012/02/15 12:07:39]

I sense SIGFPE here for code objects without ICs.

[Jakob Kummerow, 2012/02/17 16:07:52]

Done.

+        if (percentage >= FLAG_type_info_threshold) {
+          // If this particular function hasn't had any ICs patched for enough
+          // ticks, optimize it now.
+          Optimize(function, "hot and stable");
+        } else {
+          if (FLAG_trace_opt_verbose) {
+            PrintF("[not yet optimizing ");
+            function->PrintName();
+            PrintF(", not enough type info: %d/%d (%d%%)]\n",
+                   ic_typeinfo, ic_total, percentage);
+          }
+        }
       } else if (!any_ic_changed_ &&
           function->shared()->code()->instruction_size() < kMaxSizeEarlyOpt) {
         // If no IC was patched since the last tick and this function is very