Inline [] operator on one-byte strings.

runtime/vm/intermediate_language.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/intermediate_language.h"
 
 #include "vm/bit_vector.h"
 #include "vm/dart_entry.h"
 #include "vm/flow_graph_allocator.h"
 #include "vm/flow_graph_builder.h"
@@ skipping 1111 matching lines @@
 RawAbstractType* StringCharCodeAtInstr::CompileType() const {
   return Type::IntType();
 }
 
 
 intptr_t StringCharCodeAtInstr::ResultCid() const {
   return kSmiCid;
 }
 
 
+RawAbstractType* StringFromCharCodeInstr::CompileType() const {
+  return Type::StringType();
+}
+
+
+intptr_t StringFromCharCodeInstr::ResultCid() const {
+  return kDynamicCid;
+}
+
+
 RawAbstractType* LoadIndexedInstr::CompileType() const {
   switch (class_id_) {
     case kArrayCid:
     case kGrowableObjectArrayCid:
     case kImmutableArrayCid:
       return Type::DynamicType();
     case kFloat32ArrayCid :
     case kFloat64ArrayCid :
       return Type::Double();
     default:
@@ skipping 1512 matching lines @@
       return Array::length_offset();
     default:
       UNREACHABLE();
       return -1;
   }
 }
 
 #undef __
 
 }  // namespace dart