[turbofan] escape analysis supports arguments object and rest elements

src/compiler/common-operator.h

Index: src/compiler/common-operator.h
diff --git a/src/compiler/common-operator.h b/src/compiler/common-operator.h
index 46829593a4ef6d8123344723503d1cde9b3fbb66..406cdb25385c14674a252c3d6ace5439fe17aa52 100644
--- a/src/compiler/common-operator.h
+++ b/src/compiler/common-operator.h
@@ -297,6 +297,8 @@ SparseInputMask SparseInputMaskOf(Operator const*);
 ZoneVector<MachineType> const* MachineTypesOf(Operator const*)
     WARN_UNUSED_RESULT;
 
+int IsRestOf(Operator const*);

[Jarin, 2017/02/27 13:24:34]

Should be bool.

Still, some comment explaining what this means would be useful.

+
 // Interface for building common operators that can be used at any level of IR,
 // including JavaScript, mid-level, and low-level.
 class V8_EXPORT_PRIVATE CommonOperatorBuilder final
@@ -362,7 +364,7 @@ class V8_EXPORT_PRIVATE CommonOperatorBuilder final
   const Operator* StateValues(int arguments, SparseInputMask bitmask);
   const Operator* TypedStateValues(const ZoneVector<MachineType>* types,
                                    SparseInputMask bitmask);
-  const Operator* ArgumentsObjectState();
+  const Operator* ArgumentsElementsState(bool is_rest);
   const Operator* ObjectState(int pointer_slots);
   const Operator* TypedObjectState(const ZoneVector<MachineType>* types);
   const Operator* FrameState(BailoutId bailout_id,