[Bug target/98872] New: ICE leads to SEGV on MMA test case

["bergner at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98872

            Bug ID: 98872
           Summary: ICE leads to SEGV on MMA test case
           Product: gcc
           Version: 11.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: bergner at gcc dot gnu.org
  Target Milestone: ---

bergner@pike:~/gcc/BUGS/MMA$ cat ice3.i 
typedef unsigned char vec_t __attribute__((vector_size(16)));
int
foo (vec_t *rowA, vec_t *rowB, vec_t *dst)
{
  __vector_quad acc0;
  __builtin_mma_xvf32gerpp (&acc0, rowB[0], rowA[0]);
  __builtin_mma_disassemble_acc (dst, &acc0);
}

bergner@pike:~/gcc/BUGS/MMA$
/home/bergner/gcc/build/gcc-fsf-mainline-mma-builtins-debug/gcc/xgcc
-B/home/bergner/gcc/build/gcc-fsf-mainline-mma-builtins-debug/gcc -S -O2
-mcpu=power10 ice3.i 
during RTL pass: init-regs
ice3.i: In function ‘foo’:
ice3.i:8:1: internal compiler error: Segmentation fault
    8 | }
      | ^
0x113d6697 crash_signal
        /home/bergner/gcc/gcc-fsf-mainline-mma-builtins/gcc/toplev.c:327
0x10b436c4 emit_move_insn(rtx_def*, rtx_def*)
        /home/bergner/gcc/gcc-fsf-mainline-mma-builtins/gcc/expr.c:3821
0x1289319b initialize_uninitialized_regs
        /home/bergner/gcc/gcc-fsf-mainline-mma-builtins/gcc/init-regs.c:108
0x12893443 execute
        /home/bergner/gcc/gcc-fsf-mainline-mma-builtins/gcc/init-regs.c:156