Make FrameStates recursive (to be used for inlining).

src/compiler/ast-graph-builder.h

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_COMPILER_AST_GRAPH_BUILDER_H_
 #define V8_COMPILER_AST_GRAPH_BUILDER_H_
 
 #include "src/v8.h"
 
 #include "src/ast.h"
@@ skipping 247 matching lines @@
     int index = static_cast<int>(values()->size()) - depth - 1;
     return values()->at(index);
   }
   void Drop(int depth) {
     DCHECK(depth >= 0 && depth <= stack_height());
     values()->erase(values()->end() - depth, values()->end());
   }
 
   // Preserve a checkpoint of the environment for the IR graph. Any
   // further mutation of the environment will not affect checkpoints.
-  Node* Checkpoint(BailoutId ast_id);
+  Node* Checkpoint(BailoutId ast_id, Node* parent);

[Jarin, 2014/08/29 15:07:06]

I believe we will always initially create framestates without parents, so we
should not add the argument here. Instead, the Checkpoint method should just
stick in the 'undefined' as the last input.

[sigurds, 2014/09/01 08:48:18]

Done.

 
  private:
   void UpdateStateValues(Node** state_values, int offset, int count);
 
   int parameters_count_;
   int locals_count_;
   Node* parameters_node_;
   Node* locals_node_;
   Node* stack_node_;
 };
@@ skipping 143 matching lines @@
 };
 
 Scope* AstGraphBuilder::current_scope() const {
   return execution_context_->scope();
 }
 }
 }
 }  // namespace v8::internal::compiler
 
 #endif  // V8_COMPILER_AST_GRAPH_BUILDER_H_