Make FrameStates recursive (to be used for inlining).

src/compiler/ast-graph-builder.h

Index: src/compiler/ast-graph-builder.h
diff --git a/src/compiler/ast-graph-builder.h b/src/compiler/ast-graph-builder.h
index 05bc2271dcc36c4157844f29fdca4fef740268ab..94c4b8c8d4416cbabe6a9d0aaef9fa210a1f103b 100644
--- a/src/compiler/ast-graph-builder.h
+++ b/src/compiler/ast-graph-builder.h
@@ -265,7 +265,7 @@ class AstGraphBuilder::Environment
 
   // 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);