https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102986
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |sayle at gcc dot gnu.org
--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
/* PR target/102986 */
/* { dg-do compile } */
/* { dg-options "-O2" } */
typedef unsigned __int128 __attribute__((__vector_size__ (16))) V;
V v;
void
foo (int x)
{
v >>= x;
}
ICEs too.
The shift expanders aren't allowed to fail, at least when may_fail isn't set in
calls to expand_shift_1, but the new expanders only allow const_int_operand and
so ICE if the shift amount is not constant or it is an out of bounds shift (in
that case the code earlier forces the shift amount into a register).
I guess a way out of this would be to change the predicate from
"const_int_operand" to "nonmemory_operand" and if the last operand isn't
CONST_INT in ix86_expand_v1ti_shift, subreg the first operand to TImode,
expand_variable_shift it (unfortunately with make_tree on the second operand,
or
instead export expand_shift_1 and use that directly?) and then subreg to
V1TImode back.
