Move type check elimination from backend to graph builder in new compiler.

runtime/vm/flow_graph_builder.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_BUILDER_H_
 #define VM_FLOW_GRAPH_BUILDER_H_
 
 #include "vm/allocation.h"
 #include "vm/ast.h"
 #include "vm/growable_array.h"
@@ skipping 138 matching lines @@
   // preparation of a constructor call.
   // May be called only if allocating an object of a parameterized class.
   void BuildConstructorTypeArguments(ConstructorCallNode* node,
                                      intptr_t start_index,
                                      ZoneGrowableArray<Value*>* args);
 
   // Returns the value of the type arguments of the instantiator.
   Value* BuildInstantiatorTypeArguments(intptr_t token_index,
                                         intptr_t start_index);
 
+  // Perform a type check on the given value.
+  void BuildAssertAssignable(intptr_t node_id,
+                             intptr_t token_index,
+                             Value* value,
+                             const AbstractType& dst_type,
+                             const String& dst_name,
+                             intptr_t start_index);
+
+  // Perform a type check on the given value and return it.
+  Value* BuildAssignableValue(intptr_t node_id,
+                              intptr_t token_index,
+                              Value* value,
+                              const AbstractType& dst_type,
+                              const String& dst_name,
+                              intptr_t start_index);
+
   virtual void BuildInstanceOf(ComparisonNode* node);
 
   bool MustSaveRestoreContext(SequenceNode* node) const;
 
   // Moves parent context into the context register.
   void UnchainContext();
 
   void CloseFragment() { exit_ = NULL; }
   intptr_t AllocateTempIndex() { return temp_index_++; }
 
@@ skipping 35 matching lines @@
 // function from an AstNode and next temporary index to a graph fragment (as
 // in the EffectGraphVisitor), a next temporary index, and an intermediate
 // language Value.
 class ValueGraphVisitor : public EffectGraphVisitor {
  public:
   ValueGraphVisitor(FlowGraphBuilder* owner, intptr_t temp_index)
       : EffectGraphVisitor(owner, temp_index), value_(NULL) { }
 
   // Visit functions overridden by this class.
   virtual void VisitLiteralNode(LiteralNode* node);
+  virtual void VisitAssignableNode(AssignableNode* node);
   virtual void VisitIncrOpLocalNode(IncrOpLocalNode* node);
   virtual void VisitIncrOpInstanceFieldNode(IncrOpInstanceFieldNode* node);
   virtual void VisitIncrOpIndexedNode(IncrOpIndexedNode* node);
   virtual void VisitConstructorCallNode(ConstructorCallNode* node);
   virtual void VisitBinaryOpNode(BinaryOpNode* node);
   virtual void VisitConditionalExprNode(ConditionalExprNode* node);
   virtual void VisitLoadLocalNode(LoadLocalNode* node);
   virtual void VisitThrowNode(ThrowNode* node);
 
   Value* value() const { return value_; }
@@ skipping 99 matching lines @@
   TargetEntryInstr** true_successor_address_;
   TargetEntryInstr** false_successor_address_;
 
   intptr_t condition_node_id_;
   intptr_t condition_token_index_;
 };
 
 }  // namespace dart
 
 #endif  // VM_FLOW_GRAPH_BUILDER_H_