Optionally use 31-bits SMI value for 64-bit system

src/ic.cc

 // Copyright 2012 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 2597 matching lines @@
   UnaryOpIC ic(isolate);
   return ic.Transition(object);
 }
 
 
 static BinaryOpIC::TypeInfo TypeInfoFromValue(Handle<Object> value,
                                               Token::Value op) {
   v8::internal::TypeInfo type = v8::internal::TypeInfo::FromValue(value);
   if (type.IsSmi()) return BinaryOpIC::SMI;
   if (type.IsInteger32()) {
-    if (kSmiValueSize == 32) return BinaryOpIC::SMI;
+    if (SmiValuesAre32Bits()) return BinaryOpIC::SMI;
     return BinaryOpIC::INT32;
   }
   if (type.IsNumber()) return BinaryOpIC::NUMBER;
   if (type.IsString()) return BinaryOpIC::STRING;
   if (value->IsUndefined()) {
     if (op == Token::BIT_AND ||
         op == Token::BIT_OR ||
         op == Token::BIT_XOR ||
         op == Token::SAR ||
         op == Token::SHL ||
         op == Token::SHR) {
-      if (kSmiValueSize == 32) return BinaryOpIC::SMI;
+      if (SmiValuesAre32Bits()) return BinaryOpIC::SMI;
       return BinaryOpIC::INT32;
     }
     return BinaryOpIC::ODDBALL;
   }
   return BinaryOpIC::GENERIC;
 }
 
 
 static BinaryOpIC::TypeInfo InputState(BinaryOpIC::TypeInfo old_type,
                                        Handle<Object> value,
@@ skipping 57 matching lines @@
        (previous_fixed_right_arg.has_value &&
         previous_fixed_right_arg.value == value));
   Maybe<int32_t> new_fixed_right_arg(
       new_has_fixed_right_arg, new_has_fixed_right_arg ? value : 1);
 
   if (previous_fixed_right_arg.has_value == new_fixed_right_arg.has_value) {
     if (new_overall == BinaryOpIC::SMI && previous_overall == BinaryOpIC::SMI) {
       if (op == Token::DIV ||
           op == Token::MUL ||
           op == Token::SHR ||
-          kSmiValueSize == 32) {
+          SmiValuesAre32Bits()) {
         // Arithmetic on two Smi inputs has yielded a heap number.
         // That is the only way to get here from the Smi stub.
         // With 32-bit Smis, all overflows give heap numbers, but with
         // 31-bit Smis, most operations overflow to int32 results.
         result_type = BinaryOpIC::NUMBER;
       } else {
         // Other operations on SMIs that overflow yield int32s.
         result_type = BinaryOpIC::INT32;
       }
     }
@@ skipping 409 matching lines @@
 #undef ADDR
 };
 
 
 Address IC::AddressFromUtilityId(IC::UtilityId id) {
   return IC_utilities[id];
 }
 
 
 } }  // namespace v8::internal