https://gcc.gnu.org/bugzilla/show_bug.cgi?id=120722
--- Comment #1 from Tobias Burnus <burnus at gcc dot gnu.org> ---
Fails for:
Breakpoint 1, gen_highpart (mode=E_SImode, x=0x7ffff7195378) at
/home/tob/repos/gcc/gcc/emit-rtl.cc:1674
1674 gcc_assert (result && !MEM_P (result));
(gdb) p result
$1 = (rtx) 0x0
(gdb) p debug_rtx(x)
(reg:DI 106 vcc_lo [orig:693 loop_mask_26 ] [693])
with:
1670 result = simplify_gen_subreg (mode, x, GET_MODE (x),
1671 subreg_highpart_offset (mode, GET_MODE
(x)));
Caller:
#1 0x0000000000cb7376 in gen_highpart_mode (outermode=E_SImode,
innermode=E_DImode, exp=0x7ffff7195348)
called in #1 0x0000000000cb7376 in gen_highpart_mode (outermode=E_SImode,
innermode=E_DImode, exp=0x7ffff7195348)
668 [RM ,v ;flat ,12,* ,* ] global_store_dwordx2\t%A0, %1%O0%g0
669 [RM ,a ;flat ,12,cdna2,* ] ^
670 }
671 "reload_completed
672 && ((!MEM_P (operands[0]) && !MEM_P (operands[1])
673 && !gcn_sgpr_move_p (operands[0], operands[1]))
674 || (GET_CODE (operands[1]) == CONST_INT
(gdb)
675 && !gcn_constant64_p (operands[1])))"
676 [(set (match_dup 0) (match_dup 1))
677 (set (match_dup 2) (match_dup 3))]
678 {
679 rtx inlo = gen_lowpart (SImode, operands[1]);
680 rtx inhi = gen_highpart_mode (SImode, <MODE>mode, operands[1]);
681 rtx outlo = gen_lowpart (SImode, operands[0]);
682 >>>> rtx outhi = gen_highpart_mode (SImode, <MODE>mode, operands[0]);
683
684 /* Ensure that overlapping registers aren't corrupted. */
