Augment trace-ic to provide information on patching inlined loads.

src/ic.cc

 // Copyright 2006-2009 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 716 matching lines @@
     Map* map = lookup.holder()->map();
     // Property's index in the properties array.  If negative we have
     // an inobject property.
     int index = lookup.GetFieldIndex() - map->inobject_properties();
     if (index < 0) {
       // Index is an offset from the end of the object.
       int offset = map->instance_size() + (index * kPointerSize);
       if (PatchInlinedLoad(address(), map, offset)) {
         set_target(megamorphic_stub());
         return lookup.holder()->FastPropertyAt(lookup.GetFieldIndex());
+#ifdef DEBUG
+        if (FLAG_trace_ic) {
+          PrintF("[LoadIC : inline patch %s]\n", *name->ToCString());
+        }
+      } else {
+        if (FLAG_trace_ic) {
+          PrintF("[LoadIC : no inline patch %s (patching failed)]\n",
+                 *name->ToCString());
+        }
+      }
+    } else {
+      if (FLAG_trace_ic) {
+        PrintF("[LoadIC : no inline patch %s (not inobject)]\n",
+               *name->ToCString());
+      }
+    }
+  } else {
+    if (FLAG_use_ic && state == PREMONOMORPHIC) {
+      if (FLAG_trace_ic) {
+        PrintF("[LoadIC : no inline patch %s (not inlinable)]\n",
+               *name->ToCString());
+#endif
       }
     }
   }
 
   // Update inline cache and stub cache.
   if (FLAG_use_ic) {
     UpdateCaches(&lookup, state, object, name);
   }
 
   PropertyAttributes attr;
@@ skipping 848 matching lines @@
 #undef ADDR
 };
 
 
 Address IC::AddressFromUtilityId(IC::UtilityId id) {
   return IC_utilities[id];
 }
 
 
 } }  // namespace v8::internal