Faster IC stubs by specializing them for Binary Smi operations

runtime/vm/stub_code.h

Index: runtime/vm/stub_code.h
===================================================================
--- runtime/vm/stub_code.h	(revision 39307)
+++ runtime/vm/stub_code.h	(working copy)
@@ -57,6 +57,9 @@
   V(OneArgCheckInlineCache)                                                    \
   V(TwoArgsCheckInlineCache)                                                   \
   V(ThreeArgsCheckInlineCache)                                                 \
+  V(SmiAddInlineCache)                                                         \
+  V(SmiSubInlineCache)                                                         \
+  V(SmiEqualInlineCache)                                                       \
   V(OneArgOptimizedCheckInlineCache)                                           \
   V(TwoArgsOptimizedCheckInlineCache)                                          \
   V(ThreeArgsOptimizedCheckInlineCache)                                        \
@@ -199,7 +202,8 @@
   static void GenerateNArgsCheckInlineCacheStub(
       Assembler* assembler,
       intptr_t num_args,
-      const RuntimeEntry& handle_ic_miss);
+      const RuntimeEntry& handle_ic_miss,
+      Token::Kind kind);
   static void GenerateUsageCounterIncrement(Assembler* assembler,
                                             Register temp_reg);
   static void GenerateOptimizedUsageCounterIncrement(Assembler* assembler);