regex matching: Don't do unnecessary work

This commit sets a flag at pattern compilation time to indicate if
a rare case is present that requires special handling, so that that
handling can be avoided unless necessary.

1 files changed, 1 insertions, 1 deletions

diff --git a/regexec.c b/regexec.c
index 5bcca9dfc9..afe87a5fab 100644
--- a/regexec.c
+++ b/regexec.c
@@ -8751,7 +8751,7 @@ S_reginclass(pTHX_ regexp * const prog, const regnode * const n, const U8* const
                                                                  && c < 256
 #                               endif
                                 )))
-                     || ((   flags & ANYOF_LOC_FOLD)
+                     || ((   flags & ANYOF_ONLY_UTF8_LOC_FOLD_MATCHES)
                           && IN_UTF8_CTYPE_LOCALE)))
         {
             SV* only_utf8_locale = NULL;