[Bug target/99540] New: ICE: Segmentation fault in aarch64_add_offset

[asolokha at gmx dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99540

            Bug ID: 99540
           Summary: ICE: Segmentation fault in aarch64_add_offset
           Product: gcc
           Version: 11.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: asolokha at gmx dot com
  Target Milestone: ---
            Target: aarch64-linux-gnu

gcc-11.0.1-alpha20210307 snapshot (g:a18ebd6c439227b048a91fbfa66f5983f884c157)
ICEs when compiling the following testcase w/ -mcpu=neoverse-n2 -O3
-ffloat-store -ftrapv:

float *MSalign2m2m_rec_initverticalw, *MSalign2m2m_rec_currentw;

void
match_ribosum (int MSalign2m2m_rec_i, int MSalign2m2m_rec_lgth1,
               int MSalign2m2m_rec_lgth2)
{
  float **WMMTX;

  while (MSalign2m2m_rec_i < 1)
    WMMTX[MSalign2m2m_rec_i++][0] = MSalign2m2m_rec_initverticalw[0];

  while (MSalign2m2m_rec_i < MSalign2m2m_rec_lgth1)
    MSalign2m2m_rec_initverticalw[MSalign2m2m_rec_i++] += 0.1;

  while (MSalign2m2m_rec_i < MSalign2m2m_rec_lgth2)
    MSalign2m2m_rec_currentw[MSalign2m2m_rec_i++] += 0.1;
}

% aarch64-linux-gnu-gcc-11.0.1 -mcpu=neoverse-n2 -O3 -ffloat-store -ftrapv -c
i4sksvj6.c
during RTL pass: expand
i4sksvj6.c: In function 'match_ribosum':
i4sksvj6.c:4:1: internal compiler error: Segmentation fault
    4 | match_ribosum (int MSalign2m2m_rec_i, int MSalign2m2m_rec_lgth1,
      | ^~~~~~~~~~~~~
0xedb516 crash_signal
       
/var/tmp/portage/cross-aarch64-linux-gnu/gcc-11.0.1_alpha20210307/work/gcc-11-20210307/gcc/toplev.c:327
0xb193ed force_reg(machine_mode, rtx_def*)
       
/var/tmp/portage/cross-aarch64-linux-gnu/gcc-11.0.1_alpha20210307/work/gcc-11-20210307/gcc/explow.c:671
0x127a3ed aarch64_add_offset
       
/var/tmp/portage/cross-aarch64-linux-gnu/gcc-11.0.1_alpha20210307/work/gcc-11-20210307/gcc/config/aarch64/aarch64.c:4677
0x1293eea aarch64_expand_mov_immediate(rtx_def*, rtx_def*)
       
/var/tmp/portage/cross-aarch64-linux-gnu/gcc-11.0.1_alpha20210307/work/gcc-11-20210307/gcc/config/aarch64/aarch64.c:5281
0x167c29a gen_movdi(rtx_def*, rtx_def*)
       
/var/tmp/portage/cross-aarch64-linux-gnu/gcc-11.0.1_alpha20210307/work/gcc-11-20210307/gcc/config/aarch64/aarch64.md:1249
0xb41ec8 rtx_insn* insn_gen_fn::operator()<rtx_def*, rtx_def*>(rtx_def*,
rtx_def*) const
       
/var/tmp/portage/cross-aarch64-linux-gnu/gcc-11.0.1_alpha20210307/work/gcc-11-20210307/gcc/recog.h:407
0xb41ec8 emit_move_ccmode
       
/var/tmp/portage/cross-aarch64-linux-gnu/gcc-11.0.1_alpha20210307/work/gcc-11-20210307/gcc/expr.c:3640
0xb41ec8 emit_move_insn_1(rtx_def*, rtx_def*)
       
/var/tmp/portage/cross-aarch64-linux-gnu/gcc-11.0.1_alpha20210307/work/gcc-11-20210307/gcc/expr.c:3785
0xb4232e emit_move_insn(rtx_def*, rtx_def*)
       
/var/tmp/portage/cross-aarch64-linux-gnu/gcc-11.0.1_alpha20210307/work/gcc-11-20210307/gcc/expr.c:3936
0xb193ae copy_to_mode_reg(machine_mode, rtx_def*)
       
/var/tmp/portage/cross-aarch64-linux-gnu/gcc-11.0.1_alpha20210307/work/gcc-11-20210307/gcc/explow.c:653
0xdb20e4 maybe_legitimize_operand
       
/var/tmp/portage/cross-aarch64-linux-gnu/gcc-11.0.1_alpha20210307/work/gcc-11-20210307/gcc/optabs.c:7626
0xdb20e4 maybe_legitimize_operands(insn_code, unsigned int, unsigned int,
expand_operand*)
       
/var/tmp/portage/cross-aarch64-linux-gnu/gcc-11.0.1_alpha20210307/work/gcc-11-20210307/gcc/optabs.c:7758
0xdb23e4 maybe_gen_insn(insn_code, unsigned int, expand_operand*)
       
/var/tmp/portage/cross-aarch64-linux-gnu/gcc-11.0.1_alpha20210307/work/gcc-11-20210307/gcc/optabs.c:7777
0xdba917 expand_binop_directly
       
/var/tmp/portage/cross-aarch64-linux-gnu/gcc-11.0.1_alpha20210307/work/gcc-11-20210307/gcc/optabs.c:1409
0xdb6bc5 expand_binop(machine_mode, optab_tag, rtx_def*, rtx_def*, rtx_def*,
int, optab_methods)
       
/var/tmp/portage/cross-aarch64-linux-gnu/gcc-11.0.1_alpha20210307/work/gcc-11-20210307/gcc/optabs.c:1496
0xb479b8 force_operand(rtx_def*, rtx_def*)
       
/var/tmp/portage/cross-aarch64-linux-gnu/gcc-11.0.1_alpha20210307/work/gcc-11-20210307/gcc/expr.c:7753
0xb193ca copy_to_mode_reg(machine_mode, rtx_def*)
       
/var/tmp/portage/cross-aarch64-linux-gnu/gcc-11.0.1_alpha20210307/work/gcc-11-20210307/gcc/explow.c:649
0xdb070f maybe_legitimize_operand_same_code
       
/var/tmp/portage/cross-aarch64-linux-gnu/gcc-11.0.1_alpha20210307/work/gcc-11-20210307/gcc/optabs.c:7575
0xdb070f maybe_legitimize_operand_same_code
       
/var/tmp/portage/cross-aarch64-linux-gnu/gcc-11.0.1_alpha20210307/work/gcc-11-20210307/gcc/optabs.c:7550
0xdb20d4 maybe_legitimize_operand
       
/var/tmp/portage/cross-aarch64-linux-gnu/gcc-11.0.1_alpha20210307/work/gcc-11-20210307/gcc/optabs.c:7623