Declare a per-query IS_EVAL_ALWAYS constant

Author: Zalathar

compiler/rustc_query_impl/src/plumbing.rs

@@ -718,6 +718,8 @@ macro_rules! define_queries {
                 data: PhantomData<&'tcx ()>
             }
 
+            pub(crate) const IS_EVAL_ALWAYS: bool = is_eval_always!([$($modifiers)*]);
+
             const FLAGS: QueryFlags = QueryFlags {
                 is_anon: is_anon!([$($modifiers)*]),
                 is_depth_limit: depth_limit!([$($modifiers)*]),
@@ -984,7 +986,7 @@ macro_rules! define_queries {
             $(pub(crate) fn $name<'tcx>() -> DepKindVTable<'tcx> {
                 use $crate::query_impl::$name::QueryType;
                 $crate::plumbing::make_dep_kind_vtable_for_query::<QueryType<'tcx>, _, _>(
-                    is_eval_always!([$($modifiers)*]),
+                    $crate::query_impl::$name::IS_EVAL_ALWAYS,
                 )
             })*
         }