Aurelien BUHRIG <aurelien.buhrig.gcc@xxxxxxxxx> writes: > #0 0x000000000050b9e5 in copy_to_mode_reg (mode=PSImode, x=0x0) at > <...>/src/gcc/explow.c:621 x can not be NULL there. > #1 0x00000000005206d3 in set_storage_via_libcall (object=0x8a15ec0, > size=0x88a1480, val=0x88a1400, tailcall=0 '\000') at > <...>/src/gcc/expr.c:2644 The line is object = copy_to_mode_reg (Pmode, XEXP (object, 0)); so it looks like XEXP (object, 0) is NULL, which is invalid. Here object is a MEM. So you need to find out how you got a MEM with a NULL address. Ian