https://gcc.gnu.org/bugzilla/show_bug.cgi?id=126457
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Last reconfirmed| |2026-07-29
Ever confirmed|0 |1
Assignee|unassigned at gcc dot gnu.org |rguenth at gcc dot
gnu.org
Target Milestone|--- |16.2
Status|UNCONFIRMED |ASSIGNED
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
This is another latent issue - reduction operation handling doesn't know of the
special case vectorizable_call has:
/* Similarly pretend IFN_CLZ and IFN_CTZ only has one argument, the second
argument just says whether it is well-defined at zero or not and what
value should be returned for it. */
if ((cfn == CFN_CLZ || cfn == CFN_CTZ) && nargs == 2)
{
nargs = 1;
clz_ctz_arg1 = gimple_call_arg (stmt, 1);
}
now, this isn't going to be a reduction operation, but we're ICEing
trying to inspect call argument 1 which is done before we validate that.
