Improve our type feedback by recogizining never-executed IC calls for binary ...

src/ic.cc

Index: src/ic.cc
===================================================================
--- src/ic.cc	(revision 5952)
+++ src/ic.cc	(working copy)
@@ -1951,7 +1951,7 @@
 
 
 TRBinaryOpIC::TypeInfo TRBinaryOpIC::JoinTypes(TRBinaryOpIC::TypeInfo x,
-                                           TRBinaryOpIC::TypeInfo y) {
+                                               TRBinaryOpIC::TypeInfo y) {
   if (x == UNINITIALIZED) return y;
   if (y == UNINITIALIZED) return x;
   if (x == STRING && y == STRING) return STRING;
@@ -2041,6 +2041,11 @@
              TRBinaryOpIC::GetName(result_type),
              Token::Name(op));
     }
+
+    // Activate inlined smi code.
+    if (previous_type == TRBinaryOpIC::UNINITIALIZED) {
+      ic.PatchInlinedSmiCode(ic.address());
+    }
   }
 
   Handle<JSBuiltinsObject> builtins = Top::builtins();