Strength reduction optimisation seems to spot that a = a + 1; is just

a++; so write it as the former, to keep PERL_DEBUG_COW happy.

p4raw-id: //depot/perl@34039

diff --git a/regcomp.c b/regcomp.c
index 6a77d55..73fce85 100644 (file)
--- a/regcomp.c
+++ b/regcomp.c
@@ -5669,11 +5669,7 @@ S_reg(pTHX_ RExC_state_t *pRExC_state, I32 paren, I32 *flagp,U32 depth)
                                 pv = (I32*)SvGROW(sv_dat, SvCUR(sv_dat) + sizeof(I32)+1);
                                 SvCUR_set(sv_dat, SvCUR(sv_dat) + sizeof(I32));
                                 pv[count] = RExC_npar;
-#ifdef PERL_DEBUG_COW
-                               ((XPVIV*) SvANY(sv_dat))->xiv_iv++;
-#else
-                               SvIVX(sv_dat)++;
-#endif
+                                SvIV_set(sv_dat, SvIVX(sv_dat) + 1);
                             }
                         } else {
                             (void)SvUPGRADE(sv_dat,SVt_PVNV);