[turbofan] Introduce CheckTaggedSigned and CheckTaggedPointer operators.

src/compiler/typer.cc

Index: src/compiler/typer.cc
diff --git a/src/compiler/typer.cc b/src/compiler/typer.cc
index 32a5203633e3075f3ec504ceb7086642ca031c3a..bfba6f9387a74d91a73b89019e34f41b036400b2 100644
--- a/src/compiler/typer.cc
+++ b/src/compiler/typer.cc
@@ -2008,6 +2008,16 @@ Type* Typer::Visitor::TypeCheckBounds(Node* node) {
   return Type::Unsigned31();
 }
 
+Type* Typer::Visitor::TypeCheckTaggedPointer(Node* node) {
+  Type* arg = Operand(node, 0);
+  return Type::Intersect(arg, Type::TaggedPointer(), zone());
+}
+
+Type* Typer::Visitor::TypeCheckTaggedSigned(Node* node) {
+  Type* arg = Operand(node, 0);
+  return Type::Intersect(arg, typer_->cache_.kSmi, zone());
+}
+
 Type* Typer::Visitor::TypeCheckedUint32ToInt32(Node* node) {
   return Type::Signed32();
 }