Specialized string equality based on representation

src/codegen-ia32.cc

 // Copyright 2006-2008 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 3152 matching lines @@
   ASSERT(kSeqStringTag == 0);
   __ test(ecx, Immediate(kStringRepresentationMask));
   __ j(not_zero, &not_a_flat_string, not_taken);
 
   // Check for 1-byte or 2-byte string.
   __ test(ecx, Immediate(kStringEncodingMask));
   __ j(not_zero, &ascii_string, taken);
 
   // 2-byte string.
   // Load the 2-byte character code.
-  __ movzx_w(eax, FieldOperand(eax, ebx, times_2, TwoByteString::kHeaderSize));
+  __ movzx_w(eax,
+             FieldOperand(eax, ebx, times_2, SeqTwoByteString::kHeaderSize));
   __ jmp(&got_char_code);
 
   // ASCII string.
   __ bind(&ascii_string);
   // Load the byte.
-  __ movzx_b(eax, FieldOperand(eax, ebx, times_1, AsciiString::kHeaderSize));
+  __ movzx_b(eax, FieldOperand(eax, ebx, times_1, SeqAsciiString::kHeaderSize));
 
   __ bind(&got_char_code);
   ASSERT(kSmiTag == 0);
   __ shl(eax, kSmiTagSize);
   __ push(eax);
   __ jmp(&end);
 
 
   // Handle non-flat strings.
   __ bind(&not_a_flat_string);
@@ skipping 2112 matching lines @@
                                      bool is_eval) {
   Handle<Code> code = Ia32CodeGenerator::MakeCode(fun, script, is_eval);
   if (!code.is_null()) {
     Counters::total_compiled_code_size.Increment(code->instruction_size());
   }
   return code;
 }
 
 
 } }  // namespace v8::internal