Microoptimization to regexps.

src/ia32/code-stubs-ia32.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 4152 matching lines @@
   // Fill out the elements FixedArray.
   // eax: JSArray.
   // ebx: FixedArray.
   // ecx: Number of elements in array, as smi.
 
   // Set map.
   __ mov(FieldOperand(ebx, HeapObject::kMapOffset),
          Immediate(factory->fixed_array_map()));
   // Set length.
   __ mov(FieldOperand(ebx, FixedArray::kLengthOffset), ecx);
-  // Fill contents of fixed-array with the-hole.
+  // Fill contents of fixed-array with undefined.
   __ SmiUntag(ecx);
-  __ mov(edx, Immediate(factory->the_hole_value()));
+  __ mov(edx, Immediate(factory->undefined_value()));
   __ lea(ebx, FieldOperand(ebx, FixedArray::kHeaderSize));
-  // Fill fixed array elements with hole.
+  // Fill fixed array elements with undefined.
   // eax: JSArray.
   // ecx: Number of elements to fill.
   // ebx: Start of elements in FixedArray.
-  // edx: the hole.
+  // edx: undefined.
   Label loop;
   __ test(ecx, ecx);
   __ bind(&loop);
   __ j(less_equal, &done, Label::kNear);  // Jump if ecx is negative or zero.
   __ sub(ecx, Immediate(1));
   __ mov(Operand(ebx, ecx, times_pointer_size, 0), edx);
   __ jmp(&loop);
 
   __ bind(&done);
   __ ret(3 * kPointerSize);
@@ skipping 3312 matching lines @@
   // Restore ecx.
   __ pop(ecx);
   __ ret(0);
 }
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_IA32