Cross-platform cleanup in preparation of better ARM code for indexed load/store.

runtime/vm/flow_graph_compiler_arm64.cc

 // Copyright (c) 2014, 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_ARM64.
 #if defined(TARGET_ARCH_ARM64)
 
 #include "vm/flow_graph_compiler.h"
 
 #include "vm/ast_printer.h"
@@ skipping 1509 matching lines @@
     __ Drop(argument_count);
     if (!is_last_check) {
       __ b(&match_found);
     }
     __ Bind(&next_test);
   }
   __ Bind(&match_found);
 }
 
 
-// Do not implement or use this function.
-FieldAddress FlowGraphCompiler::ElementAddressForIntIndex(intptr_t cid,
-                                                          intptr_t index_scale,
-                                                          Register array,
-                                                          intptr_t index) {
+Address FlowGraphCompiler::ElementAddressForIntIndex(intptr_t cid,
+                                                     intptr_t index_scale,
+                                                     Register array,
+                                                     intptr_t index) {
   UNREACHABLE();
   return FieldAddress(array, index);
 }
 
 
-// Do not implement or use this function.
-FieldAddress FlowGraphCompiler::ElementAddressForRegIndex(intptr_t cid,
-                                                          intptr_t index_scale,
-                                                          Register array,
-                                                          Register index) {
-  UNREACHABLE();  // No register indexed with offset addressing mode on ARM.
+Address FlowGraphCompiler::ElementAddressForRegIndex(intptr_t cid,
+                                                     intptr_t index_scale,
+                                                     Register array,
+                                                     Register index) {
+  UNREACHABLE();
   return FieldAddress(array, index);
 }
 
 
 Address FlowGraphCompiler::ExternalElementAddressForIntIndex(
     intptr_t index_scale,
     Register array,
     intptr_t index) {
   UNREACHABLE();
   return FieldAddress(array, index);
@@ skipping 221 matching lines @@
 void ParallelMoveResolver::RestoreFpuScratch(FpuRegister reg) {
   UNIMPLEMENTED();
 }
 
 
 #undef __
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_ARM64