[array][torque] use new internal classes for sortState

Change-Id: Ibcac85442e755ceabd79cd87ebba7098b95a9182
Reviewed-on: https://chromium-review.googlesource.com/c/1454720Reviewed-by: Simon Zünd <szuend@chromium.org>
Commit-Queue: Tobias Tebbi <tebbi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#59406}

src/builtins/base.tq

@@ -788,6 +788,12 @@ Cast<Callable>(o: HeapObject): Callable
   return HeapObjectToCallable(o) otherwise CastError;
 }
 
+Cast<Undefined | Callable>(o: HeapObject): Undefined | Callable
+    labels CastError {
+  if (o == Undefined) return Undefined;
+  return HeapObjectToCallable(o) otherwise CastError;
+}
+
 Cast<JSArray>(o: HeapObject): JSArray
     labels CastError {
   return HeapObjectToJSArray(o) otherwise CastError;

src/torque/csa-generator.cc

@@ -600,7 +600,7 @@ void CSAGenerator::EmitInstruction(const BranchInstruction& instruction,
 
 void CSAGenerator::EmitInstruction(
     const ConstexprBranchInstruction& instruction, Stack<std::string>* stack) {
-  out_ << "    if (" << instruction.condition << ") {\n";
+  out_ << "    if ((" << instruction.condition << ")) {\n";
   out_ << "      ca_.Goto(&" << BlockName(instruction.if_true);
   for (const std::string& value : *stack) {
     out_ << ", " << value;