Optimize TypedData operators [] and []= in the same way as ScalarList.

runtime/vm/flow_graph_compiler_x64.cc

 // Copyright (c) 2013, 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/globals.h"  // Needed here to get TARGET_ARCH_X64.
 #if defined(TARGET_ARCH_X64)
 
 #include "vm/flow_graph_compiler.h"
 
 #include "lib/error.h"
@@ skipping 1524 matching lines @@
                                                           Register array,
                                                           Register index) {
   return FieldAddress(array,
                       index,
                       ToScaleFactor(index_scale),
                       DataOffsetFor(cid));
 }
 
 
 Address FlowGraphCompiler::ExternalElementAddressForIntIndex(
-    intptr_t cid,
     intptr_t index_scale,
     Register array,
     intptr_t index) {
   return Address(array, index * index_scale);
 }
 
 
 Address FlowGraphCompiler::ExternalElementAddressForRegIndex(
-    intptr_t cid,
     intptr_t index_scale,
     Register array,
     Register index) {
-  switch (cid) {
-    case kExternalUint8ArrayCid:
-    case kExternalUint8ClampedArrayCid:
-      return Address(array, index, ToScaleFactor(index_scale), 0);
-    default:
-      UNIMPLEMENTED();
-      return Address(SPREG, 0);
-  }
+  return Address(array, index, ToScaleFactor(index_scale), 0);
 }
 
 
 #undef __
 #define __ compiler_->assembler()->
 
 
 void ParallelMoveResolver::EmitMove(int index) {
   MoveOperands* move = moves_[index];
   const Location source = move->src();
@@ skipping 119 matching lines @@
 void ParallelMoveResolver::Exchange(const Address& mem1, const Address& mem2) {
   __ Exchange(mem1, mem2);
 }
 
 
 #undef __
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_X64