Convert CurrentContext and StoreContext to locations code generation scheme

runtime/vm/intermediate_language.h

 // 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.
 
 #ifndef VM_INTERMEDIATE_LANGUAGE_H_
 #define VM_INTERMEDIATE_LANGUAGE_H_
 
 #include "vm/allocation.h"
 #include "vm/ast.h"
 #include "vm/growable_array.h"
@@ skipping 344 matching lines @@
   const intptr_t try_index_;
 
   DISALLOW_COPY_AND_ASSIGN(AssertBooleanComp);
 };
 
 
 // Denotes the current context, normally held in a register.  This is
 // a computation, not a value, because it's mutable.
 class CurrentContextComp : public TemplateComputation<0> {
  public:
-  CurrentContextComp() { }
+  CurrentContextComp() : location_summary_(MakeLocationSummary()) { }
 
   DECLARE_COMPUTATION(CurrentContext)
 
+  virtual LocationSummary* locs() const {
+    return location_summary_;
+  }
+
+  static LocationSummary* MakeLocationSummary();
+
+  virtual void EmitNativeCode(FlowGraphCompiler* compiler);
+
  private:
+  LocationSummary* location_summary_;
   DISALLOW_COPY_AND_ASSIGN(CurrentContextComp);
 };
 
 
 class StoreContextComp : public TemplateComputation<1> {
  public:
-  explicit StoreContextComp(Value* value) {
+  explicit StoreContextComp(Value* value)
+      : location_summary_(MakeLocationSummary()) {
     ASSERT(value != NULL);
     inputs_[0] = value;
   }
 
   DECLARE_COMPUTATION(StoreContext);
 
+  virtual LocationSummary* locs() const {
+    return location_summary_;
+  }
+
+  static LocationSummary* MakeLocationSummary();
+
+  virtual void EmitNativeCode(FlowGraphCompiler* compiler);
+
   Value* value() const { return inputs_[0]; }
 
  private:
+  LocationSummary* location_summary_;
   DISALLOW_COPY_AND_ASSIGN(StoreContextComp);
 };
 
 
 class ClosureCallComp : public Computation {
  public:
   ClosureCallComp(ClosureCallNode* node,
                   intptr_t try_index,
                   ZoneGrowableArray<Value*>* arguments)
       : ast_node_(*node),
@@ skipping 1503 matching lines @@
   const GrowableArray<BlockEntryInstr*>& block_order_;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(FlowGraphVisitor);
 };
 
 
 }  // namespace dart
 
 #endif  // VM_INTERMEDIATE_LANGUAGE_H_