https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79405
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
(gdb) l
1476 end, and we'll go through them as well.
1477
1478 Do not forward propagate addresses into loops until after
unrolling.
1479 CSE did so because it was able to fix its own mess, but we are
not. */
1480
1481 for (i = 0; i < DF_USES_TABLE_SIZE (); i++)
1482 {
1483 df_ref use = DF_USES_GET (i);
1484 if (use)
1485 if (DF_REF_TYPE (use) == DF_REF_REG_USE
(gdb) p i
$8 = 53321
so it looks like sth corrupts uses (dumping the function at this point only
shows 80 insns).
