Ping.
Attached please find patch is for trunk (gcc-4.9):
Index: gcc/ira-costs.c
===================================================================
--- gcc/ira-costs.c (revision 206236)
+++ gcc/ira-costs.c (working copy)
@@ -155,7 +155,7 @@ inline bool
cost_classes_hasher::equal (const value_type *hv1, const compare_type *hv2) {
return hv1->num == hv2->num && memcmp (hv1->classes, hv2->classes,
- sizeof (enum reg_class) * hv1->num);
+ sizeof (enum reg_class) * hv1->num) ==
0;
}
/* Delete cost classes info V from the hash table. */
Cheers,
Fei.
> Hi Vladimir,
>
> I am trying to fix a potential bug of cost_classes_eq in ira-costs.c. This
> patch
> is for gcc-4.8 branch and should work for gcc-4.9.
> Library function memcmp return 0 if no difference for the two compared data.
> Please take a look.
>
>
> /* Compares cost classes info V1 and V2. */ static int cost_classes_eq (const
> void *v1, const void *v2) {
> const_cost_classes_t hv1 = (const_cost_classes_t) v1;
> const_cost_classes_t hv2 = (const_cost_classes_t) v2;
>
> return hv1->num == hv2->num && memcmp (hv1->classes, hv2->classes,
> - sizeof (enum reg_class) * hv1->num);
> + sizeof (enum reg_class) * hv1->num) ==
> 0;
> }
>
> Cheers,
> Fei
