Implement new optional parameters syntax in the vm (issue 4290).

runtime/vm/flow_graph.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_FLOW_GRAPH_H_
 #define VM_FLOW_GRAPH_H_
 
 #include "vm/growable_array.h"
 #include "vm/parser.h"
 
@@ skipping 31 matching lines @@
 // Class to incapsulate the construction and manipulation of the flow graph.
 class FlowGraph: public ZoneAllocated {
  public:
   FlowGraph(const FlowGraphBuilder& builder, GraphEntryInstr* graph_entry);
 
   // Function properties.
   const ParsedFunction& parsed_function() const {
     return parsed_function_;
   }
   intptr_t parameter_count() const {
-    return copied_parameter_count_ + non_copied_parameter_count_;
+    return num_copied_params_ + num_non_copied_params_;
   }
   intptr_t variable_count() const {
-    return parameter_count() + stack_local_count_;
+    return parameter_count() + num_stack_locals_;
   }
-  intptr_t stack_local_count() const {
-    return stack_local_count_;
+  intptr_t num_stack_locals() const {
+    return num_stack_locals_;
   }
-  intptr_t copied_parameter_count() const {
-    return copied_parameter_count_;
+  intptr_t num_copied_params() const {
+    return num_copied_params_;
   }
-  intptr_t non_copied_parameter_count() const {
-    return non_copied_parameter_count_;
+  intptr_t num_non_copied_params() const {
+    return num_non_copied_params_;
   }
 
   // Flow graph orders.
   const GrowableArray<BlockEntryInstr*>& preorder() const {
     return preorder_;
   }
   const GrowableArray<BlockEntryInstr*>& postorder() const {
     return postorder_;
   }
   const GrowableArray<BlockEntryInstr*>& reverse_postorder() const {
@@ skipping 72 matching lines @@
 
   // DiscoverBlocks computes parent_ and assigned_vars_ which are then used
   // if/when computing SSA.
   GrowableArray<intptr_t> parent_;
   GrowableArray<BitVector*> assigned_vars_;
 
   intptr_t current_ssa_temp_index_;
 
   // Flow graph fields.
   const ParsedFunction& parsed_function_;
-  const intptr_t copied_parameter_count_;
-  const intptr_t non_copied_parameter_count_;
-  const intptr_t stack_local_count_;
+  const intptr_t num_copied_params_;
+  const intptr_t num_non_copied_params_;
+  const intptr_t num_stack_locals_;
   GraphEntryInstr* graph_entry_;
   GrowableArray<BlockEntryInstr*> preorder_;
   GrowableArray<BlockEntryInstr*> postorder_;
   GrowableArray<BlockEntryInstr*> reverse_postorder_;
   ZoneGrowableArray<ReturnInstr*>* exits_;
 };
 
 }  // namespace dart
 
 #endif  // VM_FLOW_GRAPH_H_