regcomp.c - use macro wrappers to minimize impact of struct split

We will move various members of the regexp structure to a new
structure which just contains information about the match. Wrapping
the members in the standard macros means that change can be made
less invasive. We already did all of this in regexec.c

Author: demerphq

regcomp.c

@@ -13275,7 +13275,7 @@ Perl_reg_temp_copy(pTHX_ REGEXP *dsv, REGEXP *ssv)
 
     RX_MATCH_COPIED_off(dsv);
 #ifdef PERL_ANY_COW
-    drx->saved_copy = NULL;
+    RXp_SAVED_COPY(drx) = NULL;
 #endif
     drx->mother_re = ReREFCNT_inc(srx->mother_re ? srx->mother_re : ssv);
     SvREFCNT_inc_void(drx->qr_anoncv);
@@ -13500,11 +13500,11 @@ Perl_re_dup_guts(pTHX_ const REGEXP *sstr, REGEXP *dstr, CLONE_PARAMS *param)
         RXi_SET(ret, CALLREGDUPE_PVT(dstr, param));
 
     if (RX_MATCH_COPIED(dstr))
-        ret->subbeg  = SAVEPVN(ret->subbeg, ret->sublen);
+        RXp_SUBBEG(ret)  = SAVEPVN(RXp_SUBBEG(ret), RXp_SUBLEN(ret));
     else
-        ret->subbeg = NULL;
+        RXp_SUBBEG(ret) = NULL;
 #ifdef PERL_ANY_COW
-    ret->saved_copy = NULL;
+    RXp_SAVED_COPY(ret) = NULL;
 #endif
 
     if (r->logical_to_parno) {