[turbofan] Nuke the funny typing rule for JSTypedArray constants.

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 <iomanip>
 
 #include "src/base/flags.h"
 #include "src/bootstrapper.h"
@@ skipping 2276 matching lines @@
 
 Type* Typer::Visitor::TypeWord32PairShl(Node* node) { return Type::Internal(); }
 
 Type* Typer::Visitor::TypeWord32PairShr(Node* node) { return Type::Internal(); }
 
 Type* Typer::Visitor::TypeWord32PairSar(Node* node) { return Type::Internal(); }
 
 // Heap constants.
 
 Type* Typer::Visitor::TypeConstant(Handle<Object> value) {
-  if (value->IsJSTypedArray()) {
-    switch (JSTypedArray::cast(*value)->type()) {
-#define TYPED_ARRAY_CASE(Type, type, TYPE, ctype, size) \
-  case kExternal##Type##Array:                          \
-    return typer_->cache_.k##Type##Array;
-      TYPED_ARRAYS(TYPED_ARRAY_CASE)
-#undef TYPED_ARRAY_CASE
-    }
-  }
   if (Type::IsInteger(*value)) {
     return Type::Range(value->Number(), value->Number(), zone());
   }
   return Type::Constant(value, zone());
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8