Revert "Add signed/unsigned 8-bit and 16-bit Representations to Crankshaft"

src/ia32/lithium-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 2414 matching lines @@
     obj = needs_write_barrier_for_map
         ? UseRegister(instr->object())
         : UseRegisterAtStart(instr->object());
   }
 
   bool can_be_constant = instr->value()->IsConstant() &&
       HConstant::cast(instr->value())->NotInNewSpace() &&
       !(FLAG_track_double_fields && instr->field_representation().IsDouble());
 
   LOperand* val;
-  if (instr->field_representation().IsInteger8() ||
-      instr->field_representation().IsUInteger8()) {
+  if (instr->field_representation().IsByte()) {
     // mov_b requires a byte register (i.e. any of eax, ebx, ecx, edx).
     // Just force the value to be in eax and we're safe here.
     val = UseFixed(instr->value(), eax);
   } else if (needs_write_barrier) {
     val = UseTempRegister(instr->value());
   } else if (can_be_constant) {
     val = UseRegisterOrConstant(instr->value());
   } else if (FLAG_track_fields && instr->field_representation().IsSmi()) {
     val = UseTempRegister(instr->value());
   } else if (FLAG_track_double_fields &&
@@ skipping 300 matching lines @@
 LInstruction* LChunkBuilder::DoLoadFieldByIndex(HLoadFieldByIndex* instr) {
   LOperand* object = UseRegister(instr->object());
   LOperand* index = UseTempRegister(instr->index());
   return DefineSameAsFirst(new(zone()) LLoadFieldByIndex(object, index));
 }
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_IA32