Convert CurrentContext and StoreContext to locations code generation scheme

runtime/vm/intermediate_language_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 "vm/locations.h"
 #include "vm/stub_code.h"
@@ skipping 28 matching lines @@
     intptr_t input_count, Location out) {
   LocationSummary* summary = new LocationSummary(input_count);
   for (intptr_t i = 0; i < input_count; i++) {
     summary->set_in(i, Location::RequiresRegister());
   }
   summary->set_out(out);
   return summary;
 }
 
 
+LocationSummary* CurrentContextComp::MakeLocationSummary() {
+  return MakeSimpleLocationSummary(0, Location::RequiresRegister());
+}
+
+
+void CurrentContextComp::EmitNativeCode(FlowGraphCompiler* compiler) {
+  __ movq(locs()->out().reg(), CTX);
+}
+
+
+LocationSummary* StoreContextComp::MakeLocationSummary() {
+  LocationSummary* summary = new LocationSummary(1);
+  summary->set_in(0, Location::RegisterLocation(CTX));
+  return summary;
+}
+
+
+void StoreContextComp::EmitNativeCode(FlowGraphCompiler* compiler) {
+  // Nothing to do.  Context register were loaded by register allocator.
+  ASSERT(locs()->in(0).reg() == CTX);
+}
+
+
 LocationSummary* StrictCompareComp::MakeLocationSummary() {
   return MakeSimpleLocationSummary(2, Location::SameAsFirstInput());
 }
 
 
 void StrictCompareComp::EmitNativeCode(FlowGraphCompiler* compiler) {
   const Bool& bool_true = Bool::ZoneHandle(Bool::True());
   const Bool& bool_false = Bool::ZoneHandle(Bool::False());
 
   Register left = locs()->in(0).reg();
@@ skipping 84 matching lines @@
   computation()->EmitNativeCode(compiler);
   __ pushq(locs()->out().reg());
 }
 
 
 }  // namespace dart
 
 #undef __
 
 #endif  // defined TARGET_ARCH_X64