Perform string add in generated code on IA-32 platforms...

src/v8-counters.h

 // Copyright 2007-2008 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 135 matching lines @@
   SC(array_function_runtime, V8.ArrayFunctionRuntime)               \
   SC(array_function_native, V8.ArrayFunctionNative)                 \
   SC(for_in, V8.ForIn)                                              \
   SC(enum_cache_hits, V8.EnumCacheHits)                             \
   SC(enum_cache_misses, V8.EnumCacheMisses)                         \
   SC(reloc_info_count, V8.RelocInfoCount)                           \
   SC(reloc_info_size, V8.RelocInfoSize)                             \
   SC(zone_segment_bytes, V8.ZoneSegmentBytes)                       \
   SC(compute_entry_frame, V8.ComputeEntryFrame)                     \
   SC(generic_binary_stub_calls, V8.GenericBinaryStubCalls)          \
-  SC(generic_binary_stub_calls_regs, V8.GenericBinaryStubCallsRegs)
-
+  SC(generic_binary_stub_calls_regs, V8.GenericBinaryStubCallsRegs) \
+  SC(string_add_runtime, V8.StringAddRuntime)                       \
+  SC(string_add_native, V8.StringAddNative)
 
 // This file contains all the v8 counters that are in use.
 class Counters : AllStatic {
  public:
 #define HT(name, caption) \
   static HistogramTimer name;
   HISTOGRAM_TIMER_LIST(HT)
 #undef HT
 
 #define SC(name, caption) \
@@ skipping 16 matching lines @@
     stats_counter_count
   };
 
   // Sliding state window counters.
   static StatsCounter state_counters[];
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_V8_COUNTERS_H_