https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96791
acsawdey at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Assignee|unassigned at gcc dot gnu.org |acsawdey at gcc dot
gnu.org
--- Comment #5 from acsawdey at gcc dot gnu.org ---
Nope, this is my patch that added vector pair to memcpy/memmove expansion. We
apparently don't have the right patterns defined for this to extract things
from the POImode reg that it uses.
This is the code in expr.c:
if (GET_MODE_CLASS (from_mode) == MODE_PARTIAL_INT)
{
rtx new_from;
scalar_int_mode full_mode
= smallest_int_mode_for_size (GET_MODE_BITSIZE (from_mode));
convert_optab ctab = unsignedp ? zext_optab : sext_optab;
enum insn_code icode;
icode = convert_optab_handler (ctab, full_mode, from_mode);
gcc_assert (icode != CODE_FOR_nothing);
convert_optab_handler doesn't find anything to go from POImode to DImode, so
the assert fires.
