[builtins] Array.prototype.filter implemented as a TurboFan code stub.

src/interface-descriptors.h

Index: src/interface-descriptors.h
diff --git a/src/interface-descriptors.h b/src/interface-descriptors.h
index 95ebb4976ca33c0b2798c5590d992a61b09e8b43..88b41f40c5401e1e098cdf411e3bb3e140a37d57 100644
--- a/src/interface-descriptors.h
+++ b/src/interface-descriptors.h
@@ -57,6 +57,7 @@ class PlatformInterfaceDescriptor;
   V(TransitionElementsKind)                \
   V(AllocateHeapNumber)                    \
   V(Builtin)                               \
+  V(ArrayFilter)                           \
   V(ArrayConstructor)                      \
   V(IteratingArrayBuiltin)                 \
   V(IteratingArrayBuiltinLoopContinuation) \
@@ -724,6 +725,14 @@ class IteratingArrayBuiltinLoopContinuationDescriptor
   DECLARE_BUILTIN_DESCRIPTOR(IteratingArrayBuiltinLoopContinuationDescriptor)
 };
 
+// TODO(mvstanton): It's the same as ForEach and some other array descriptors.
+// Sharing is probably better.
+class ArrayFilterDescriptor : public BuiltinDescriptor {

[danno, 2017/03/20 16:58:38]

I don't think you need this at all anymore....

[mvstanton, 2017/03/20 22:08:31]

Done.

+ public:
+  DEFINE_BUILTIN_PARAMETERS(kCallback, kThisArg)
+  DECLARE_BUILTIN_DESCRIPTOR(ArrayFilterDescriptor)
+};
+
 class ArrayConstructorDescriptor : public CallInterfaceDescriptor {
  public:
   DEFINE_PARAMETERS(kTarget, kNewTarget, kActualArgumentsCount, kAllocationSite)