regcomp.c: Use better method for setting debug offsets

This was changing the parse pointer around some code and restoring it
afterwards.  The purpose must have been to get the debug offsets
correct.  But there is a better way to do that, which doesn't take up
cycles on a non-Debugging build, and that is to set the offsets
directly.

diff --git a/regcomp.c b/regcomp.c
index 1d9ff63..ee67f5a 100644 (file)
--- a/regcomp.c
+++ b/regcomp.c
@@ -18098,7 +18098,6 @@ S_regclass(pTHX_ RExC_state_t *pRExC_state, I32 *flagp, U32 depth,
 
     if (optimizable) {
         int posix_class = -1;   /* Illegal value */
-        const char * cur_parse= RExC_parse;
         U8 ANYOFM_mask = 0xFF;
         U32 anode_arg = 0;
         UV start, end;
@@ -18364,15 +18363,13 @@ S_regclass(pTHX_ RExC_state_t *pRExC_state, I32 *flagp, U32 depth,
         }
 
         if (op != END) {
-            RExC_parse = (char *)orig_parse;
-
             if (regarglen[op]) {
                 ret = reganode(pRExC_state, op, anode_arg);
             } else {
                 ret = reg_node(pRExC_state, op);
             }
-
-            RExC_parse = (char *)cur_parse;
+            Set_Node_Offset_Length(REGNODE_p(ret), orig_parse - RExC_start,
+                                                   RExC_parse - orig_parse);;
 
             if (PL_regkind[op] == EXACT) {
                 alloc_maybe_populate_EXACT(pRExC_state, ret, flagp, 0, value,