Refactoring of RegExp interface to better support calling several times in a row.

src/ia32/macro-assembler-ia32.h

 // Copyright 2006-2009 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 164 matching lines @@
                                Register map,
                                Register instance_type);
 
   // FCmp is similar to integer cmp, but requires unsigned
   // jcc instructions (je, ja, jae, jb, jbe, je, and jz).
   void FCmp();
 
   // Smi tagging support.
   void SmiTag(Register reg) {
     ASSERT(kSmiTag == 0);
-    shl(reg, kSmiTagSize);
+    ASSERT(kSmiTagSize == 1);
+    add(reg, Operand(reg));
   }
   void SmiUntag(Register reg) {
     sar(reg, kSmiTagSize);
   }
 
   // Abort execution if argument is not a number. Used in debug code.
   void AbortIfNotNumber(Register object, const char* msg);
 
   // Abort execution if argument is not a smi. Used in debug code.
   void AbortIfNotSmi(Register object, const char* msg);
@@ skipping 383 matching lines @@
   }                                                                       \
   masm->
 #else
 #define ACCESS_MASM(masm) masm->
 #endif
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_IA32_MACRO_ASSEMBLER_IA32_H_