Rename pattern_complexity attr as pattern_complexity_limit.

For consistency with `recursion_limit`, `move_size_limit`, and
`type_length_limit`.

compiler/rustc_feature/src/builtin_attrs.rs

@@ -1149,7 +1149,7 @@ pub static BUILTIN_ATTRIBUTES: &[BuiltinAttribute] = &[
         "the `#[omit_gdb_pretty_printer_section]` attribute is just used for the Rust test suite",
     ),
     rustc_attr!(
-        TEST, pattern_complexity, CrateLevel, template!(NameValueStr: "N"),
+        TEST, pattern_complexity_limit, CrateLevel, template!(NameValueStr: "N"),
         ErrorFollowing, EncodeCrossCrate::No,
     ),
 ];

compiler/rustc_feature/src/unstable.rs

@@ -227,7 +227,7 @@ declare_features! (
     /// Allows using `#[omit_gdb_pretty_printer_section]`.
     (internal, omit_gdb_pretty_printer_section, "1.5.0", None),
     /// Set the maximum pattern complexity allowed (not limited by default).
-    (internal, pattern_complexity, "1.78.0", None),
+    (internal, pattern_complexity_limit, "1.78.0", None),
     /// Allows using pattern types.
     (internal, pattern_types, "1.79.0", Some(123646)),
     /// Allows using `#[prelude_import]` on glob `use` items.

compiler/rustc_interface/src/limits.rs

@@ -36,7 +36,7 @@ pub(crate) fn provide(providers: &mut Providers) {
         pattern_complexity_limit: get_limit(
             tcx.hir().krate_attrs(),
             tcx.sess,
-            sym::pattern_complexity,
+            sym::pattern_complexity_limit,
             Limit::unlimited(),
         ),
     }

compiler/rustc_span/src/symbol.rs

@@ -1512,7 +1512,7 @@ symbols! {
         path_main_separator,
         path_to_pathbuf,
         pathbuf_as_path,
-        pattern_complexity,
+        pattern_complexity_limit,
         pattern_parentheses,
         pattern_type,
         pattern_types,