https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112468
--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
new_stmt = build_call_internal (ifn, res_op);
static gcall *
build_call_internal (internal_fn fn, gimple_match_op *res_op)
{
if (direct_internal_fn_p (fn))
{
tree_pair types = direct_internal_fn_types (fn, res_op->type,
res_op->ops);
if (!direct_internal_fn_supported_p (fn, types, OPTIMIZE_FOR_BOTH))
return NULL; // here.
}
Causes copysign to return NULL here ....
I suspect the pattern should be changed to:
/* Transform fneg (fabs (X)) -> copysign (X, -1). */
(simplify
(negate (abs @0))
(if (direct_internal_fn_supported_p (IFN_COPYSIGN, type, OPTIMIZE_FOR_BOTH))
(IFN_COPYSIGN @0 { build_minus_one_cst (type); })))
Notice the check against direct_internal_fn_supported_p here.
This is similar to the (trunc)copysign((extend)..) pattern.
/* Simplify (trunc)copysign ((extend)x, (extend)y) to copysignf (x, y),
x,y is float value, similar for _Float16/double. */
(for copysigns (COPYSIGN_ALL)
(simplify
(convert (copysigns (convert@2 @0) (convert @1)))
