[turbofan] Return constant type for functions with unknown parameter count.

src/compiler/typer.cc

 // 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.
 
 #include "src/compiler/typer.h"
 
 #include "src/base/flags.h"
 #include "src/base/lazy-instance.h"
 #include "src/bootstrapper.h"
 #include "src/compiler/graph-reducer.h"
@@ skipping 2347 matching lines @@
         return typer_->cache_.kFloat32ArrayFunc;
       } else if (*value == native->float64_array_fun()) {
         return typer_->cache_.kFloat64ArrayFunc;
       }
     }
     int const arity =
         JSFunction::cast(*value)->shared()->internal_formal_parameter_count();
     switch (arity) {
       case SharedFunctionInfo::kDontAdaptArgumentsSentinel:
         // Some smart optimization at work... &%$!&@+$!
-        return Type::Any(zone());
+        break;
       case 0:
         return typer_->cache_.kAnyFunc0;
       case 1:
         return typer_->cache_.kAnyFunc1;
       case 2:
         return typer_->cache_.kAnyFunc2;
       case 3:
         return typer_->cache_.kAnyFunc3;
       default: {
         DCHECK_LT(3, arity);
@@ skipping 10 matching lines @@
       TYPED_ARRAYS(TYPED_ARRAY_CASE)
 #undef TYPED_ARRAY_CASE
     }
   }
   return Type::Constant(value, zone());
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8