A more efficient copy in Perl_reg_temp_copy()

p4raw-id: //depot/perl@30754

diff --git a/regcomp.c b/regcomp.c
index bbff562..4a019e1 100644 (file)
--- a/regcomp.c
+++ b/regcomp.c
@@ -8726,31 +8726,15 @@ Perl_reg_temp_copy (pTHX_ struct regexp *r) {
         struct reg_substr_datum *s;
         I32 i;
         Newx(ret->substrs, 1, struct reg_substr_data);
-        for (s = ret->substrs->data, i = 0; i < 3; i++, s++) {
-            s->min_offset = r->substrs->data[i].min_offset;
-            s->max_offset = r->substrs->data[i].max_offset;
-            s->end_shift  = r->substrs->data[i].end_shift;
-            if (i < 2) {
-               s->substr      = SvREFCNT_inc(r->substrs->data[i].substr);
-               s->utf8_substr = SvREFCNT_inc(r->substrs->data[i].utf8_substr);
-           }
-        }
-       if (r->check_substr == r->anchored_substr)
-           ret->check_substr = ret->anchored_substr;
-       else if (r->check_substr == r->float_substr)
-           ret->check_substr = ret->float_substr;
-       else {
-           assert(!r->check_substr);
-           ret->check_substr = NULL;
-       }
-       if (r->check_utf8 == r->anchored_utf8)
-           ret->check_utf8 = ret->anchored_utf8;
-       else if (r->check_utf8 == r->float_utf8)
-           ret->check_utf8 = ret->float_utf8;
-       else {
-           assert(!r->check_utf8);
-           ret->check_utf8 = NULL;
-       }
+       StructCopy(r->substrs, ret->substrs, struct reg_substr_data);
+
+       SvREFCNT_inc_void(ret->anchored_substr);
+       SvREFCNT_inc_void(ret->anchored_utf8);
+       SvREFCNT_inc_void(ret->float_substr);
+       SvREFCNT_inc_void(ret->float_utf8);
+
+       /* check_substr and check_utf8, if non-NULL, point to either their
+          anchored or float namesakes, and don't hold a second reference.  */
     }
     RX_MATCH_COPIED_off(ret);
 #ifdef PERL_OLD_COPY_ON_WRITE