Optimize one byte string comparisons.

runtime/vm/il_printer.cc

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/il_printer.h"
 
 #include "vm/intermediate_language.h"
 #include "vm/os.h"
 #include "vm/parser.h"
 
@@ skipping 959 matching lines @@
   f->Print("%s ", DebugName());
   for (intptr_t i = 0; i < moves_.length(); i++) {
     if (i != 0) f->Print(", ");
     moves_[i]->dest().PrintTo(f);
     f->Print(" <- ");
     moves_[i]->src().PrintTo(f);
   }
 }
 
 
+void StringCharCodeInstr::PrintTo(BufferFormatter* f) const {
+  PrintUse(f, *this);
+  if (is_used()) {
+    if (HasSSATemp() || (temp_index() != -1)) f->Print(" <- ");
+  }
+  f->Print("%s:%" Pd "(",
+      (kind() == kToCharCode) ? "StringToCharCode" : "StringFromCharCode",
+      GetDeoptId());
+  PrintOperandsTo(f);
+  f->Print(")");
+  if (range_ != NULL) {
+    f->Print(" ");
+    range_->PrintTo(f);
+  }
+
+  if (type_ != NULL) {
+    f->Print(" ");
+    type_->PrintTo(f);
+  }
+}
+
+
 void Environment::PrintTo(BufferFormatter* f) const {
   f->Print(" env={ ");
   int arg_count = 0;
   for (intptr_t i = 0; i < values_.length(); ++i) {
     if (i > 0) f->Print(", ");
     if (values_[i]->definition()->IsPushArgument()) {
       f->Print("a%d", arg_count++);
     } else {
       values_[i]->PrintTo(f);
     }
     if ((locations_ != NULL) && !locations_[i].IsInvalid()) {
       f->Print(" [");
       locations_[i].PrintTo(f);
       f->Print("]");
     }
   }
   f->Print(" }");
   if (outer_ != NULL) outer_->PrintTo(f);
 }
 
 }  // namespace dart