[stubs] Add IsCallableMap predicate to CSA

src/builtins/builtins-regexp.cc

 // Copyright 2016 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/builtins/builtins-utils.h"
 #include "src/builtins/builtins.h"
 
 #include "src/code-factory.h"
 #include "src/regexp/jsregexp.h"
 #include "src/regexp/regexp-utils.h"
@@ skipping 1587 matching lines @@
   BranchIfFastPath(a, context, map, &checkreplacecallable, &runtime);
 
   a->Bind(&checkreplacecallable);
   Node* const regexp = receiver;
 
   // 2. Is {replace_value} callable?
   Label checkreplacestring(a), if_iscallable(a, Label::kDeferred);
   a->GotoIf(a->TaggedIsSmi(replace_value), &checkreplacestring);
 
   Node* const replace_value_map = a->LoadMap(replace_value);
-  a->Branch(
-      a->Word32Equal(a->Word32And(a->LoadMapBitField(replace_value_map),
-                                  a->Int32Constant(1 << Map::kIsCallable)),
-                     a->Int32Constant(0)),
-      &checkreplacestring, &if_iscallable);
+  a->Branch(a->IsCallableMap(replace_value_map), &if_iscallable,
+            &checkreplacestring);
 
   // 3. Does ToString({replace_value}) contain '$'?
   a->Bind(&checkreplacestring);
   {
     Node* const replace_string =
         a->CallStub(tostring_callable, context, replace_value);
 
     Node* const dollar_char = a->IntPtrConstant('$');
     Node* const smi_minusone = a->SmiConstant(Smi::FromInt(-1));
     a->GotoUnless(a->SmiEqual(a->StringIndexOfChar(context, replace_string,
@@ skipping 72 matching lines @@
   a->Bind(&if_matched);
   {
     Node* result = ConstructNewResultFromMatchInfo(isolate, a, context,
                                                    match_indices, string);
     a->Return(result);
   }
 }
 
 }  // namespace internal
 }  // namespace v8