Introduce representation types

src/code-stubs-hydrogen.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 912 matching lines @@
   } else {
     result = BuildBinaryOperation(
             state.op(), left, right,
             left_type, right_type, result_type,
             state.fixed_right_arg(), allocation_mode);
   }
 
   // If we encounter a generic argument, the number conversion is
   // observable, thus we cannot afford to bail out after the fact.
   if (!state.HasSideEffects()) {
-    if (result_type->Is(Type::Smi())) {
+    if (result_type->Is(Type::SignedSmall())) {
       if (state.op() == Token::SHR) {
         // TODO(olivf) Replace this by a SmiTagU Instruction.
         // 0x40000000: this number would convert to negative when interpreting
         // the register as signed value;
         IfBuilder if_of(this);
         if_of.IfNot<HCompareNumericAndBranch>(result,
             Add<HConstant>(static_cast<int>(SmiValuesAre32Bits()
                 ? 0x80000000 : 0x40000000)), Token::EQ_STRICT);
         if_of.Then();
         if_of.ElseDeopt("UInt->Smi oveflow");
@@ skipping 471 matching lines @@
   return BuildRegExpConstructResult(length, index, input);
 }
 
 
 Handle<Code> RegExpConstructResultStub::GenerateCode(Isolate* isolate) {
   return DoGenerateCode(isolate, this);
 }
 
 
 } }  // namespace v8::internal