X64: Change some smi operations to work on untagged integers instead.

src/x64/assembler-x64.cc

 // Copyright 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 1130 matching lines @@
 
 void Assembler::incl(const Operand& dst) {
   EnsureSpace ensure_space(this);
   last_pc_ = pc_;
   emit_optional_rex_32(dst);
   emit(0xFF);
   emit_operand(0, dst);
 }
 
 
+void Assembler::incl(Register dst) {
+  EnsureSpace ensure_space(this);
+  last_pc_ = pc_;
+  emit_optional_rex_32(dst);
+  emit(0xFF);
+  emit_modrm(0, dst);
+}
+
+
 void Assembler::int3() {
   EnsureSpace ensure_space(this);
   last_pc_ = pc_;
   emit(0xCC);
 }
 
 
 void Assembler::j(Condition cc, Label* L) {
   if (cc == always) {
     jmp(L);
@@ skipping 1694 matching lines @@
   // specially coded on x64 means that it is a relative 32 bit address, as used
   // by branch instructions.
   return (1 << rmode_) & kApplyMask;
 }
 
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_X64