Convert CurrentContext and StoreContext to locations code generation scheme

runtime/vm/flow_graph_compiler_x64.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/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 571 matching lines @@
 
   GenerateCall(token_index,
                try_index,
                &StubCode::CallStaticFunctionLabel(),
                PcDescriptors::kFuncCall);
   __ Drop(argument_count);
 }
 
 
 void FlowGraphCompiler::VisitCurrentContext(CurrentContextComp* comp) {
-  __ movq(RAX, CTX);
+  // Moved to intermediate_language_x64.cc.
+  UNREACHABLE();
 }
 
 
 void FlowGraphCompiler::VisitStoreContext(StoreContextComp* comp) {
-  LoadValue(CTX, comp->value());
+  // Moved to intermediate_language_x64.cc.
+  UNREACHABLE();
 }
 
 
 void FlowGraphCompiler::VisitClosureCall(ClosureCallComp* comp) {
   // Moved to intermediate_language_x64.cc.
   UNREACHABLE();
 }
 
 
 void FlowGraphCompiler::VisitInstanceCall(InstanceCallComp* comp) {
@@ skipping 1191 matching lines @@
 
 
 void FlowGraphCompiler::FinalizeComments(const Code& code) {
   code.set_comments(assembler_->GetCodeComments());
 }
 
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_X64