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

src/interface-descriptors.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_CALL_INTERFACE_DESCRIPTOR_H_
 #define V8_CALL_INTERFACE_DESCRIPTOR_H_
 
 #include <memory>
 
 #include "src/assembler.h"
@@ skipping 39 matching lines @@
   V(ConstructStub)                         \
   V(ConstructTrampoline)                   \
   V(RegExpExec)                            \
   V(RegExpPrototypeExecSlow)               \
   V(RegExpReplace)                         \
   V(RegExpSplit)                           \
   V(CopyFastSmiOrObjectElements)           \
   V(TransitionElementsKind)                \
   V(AllocateHeapNumber)                    \
   V(Builtin)                               \
+  V(ArrayFilter)                           \
   V(ArrayConstructor)                      \
   V(IteratingArrayBuiltin)                 \
   V(IteratingArrayBuiltinLoopContinuation) \
   V(ArrayNoArgumentConstructor)            \
   V(ArraySingleArgumentConstructor)        \
   V(ArrayNArgumentsConstructor)            \
   V(Compare)                               \
   V(BinaryOp)                              \
   V(BinaryOpWithAllocationSite)            \
   V(BinaryOpWithVector)                    \
@@ skipping 647 matching lines @@
 };
 
 class IteratingArrayBuiltinLoopContinuationDescriptor
     : public BuiltinDescriptor {
  public:
   DEFINE_BUILTIN_PARAMETERS(kCallback, kThisArg, kArray, kObject, kInitialK,
                             kLength)
   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)
   DECLARE_DESCRIPTOR_WITH_CUSTOM_FUNCTION_TYPE(ArrayConstructorDescriptor,
                                                CallInterfaceDescriptor)
 };
 
 class ArrayNoArgumentConstructorDescriptor : public CallInterfaceDescriptor {
  public:
   DEFINE_PARAMETERS(kFunction, kAllocationSite, kActualArgumentsCount,
@@ skipping 260 matching lines @@
 }  // namespace v8
 
 
 #if V8_TARGET_ARCH_ARM64
 #include "src/arm64/interface-descriptors-arm64.h"
 #elif V8_TARGET_ARCH_ARM
 #include "src/arm/interface-descriptors-arm.h"
 #endif
 
 #endif  // V8_CALL_INTERFACE_DESCRIPTOR_H_