Support arguments object access from inlined functions.

src/hydrogen.h

Index: src/hydrogen.h
diff --git a/src/hydrogen.h b/src/hydrogen.h
index e2779bb2260d10cfed8b0a048dd641b685e4cba6..82e3119c5d1050c7a98cf146ae05daaf1839a00a 100644
--- a/src/hydrogen.h
+++ b/src/hydrogen.h
@@ -42,6 +42,7 @@ namespace internal {
 
 // Forward declarations.
 class BitVector;
+class FunctionState;
 class HEnvironment;
 class HGraph;
 class HLoopInformation;
@@ -121,7 +122,7 @@ class HBasicBlock: public ZoneObject {
 
   void Finish(HControlInstruction* last);
   void FinishExit(HControlInstruction* instruction);
-  void Goto(HBasicBlock* block, bool drop_extra = false);
+  void Goto(HBasicBlock* block, FunctionState* state = NULL);
 
   int PredecessorIndexOf(HBasicBlock* predecessor) const;
   void AddSimulate(int ast_id) { AddInstruction(CreateSimulate(ast_id)); }
@@ -136,7 +137,7 @@ class HBasicBlock: public ZoneObject {
   // instruction and updating the bailout environment.
   void AddLeaveInlined(HValue* return_value,
                        HBasicBlock* target,
-                       bool drop_extra = false);
+                       FunctionState* state = NULL);
 
   // If a target block is tagged as an inline function return, all
   // predecessors should contain the inlined exit sequence:
@@ -715,6 +716,16 @@ class FunctionState {
 
   FunctionState* outer() { return outer_; }
 
+  HInstruction* entry() { return entry_; }
+  void set_entry(HInstruction* entry) { entry_ = entry; }
+
+  HInstruction* arguments_elements() { return arguments_elements_; }
+  void set_arguments_elements(HInstruction* arguments_elements) {
+    arguments_elements_ = arguments_elements;
+  }
+
+  bool arguments_pushed() { return arguments_elements() != NULL; }
+
  private:
   HGraphBuilder* owner_;
 
@@ -741,6 +752,12 @@ class FunctionState {
   // return blocks.  NULL in all other cases.
   TestContext* test_context_;
 
+  // When inlining HEnterInlined instruction corresponding to the function
+  // entry.
+  HInstruction* entry_;
+
+  HInstruction* arguments_elements_;
+
   FunctionState* outer_;
 };