[Bug rtl-optimization/91503] New: ICE ira-build.i:17:1: error: shared rtx

[skpgkp2 at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91503

            Bug ID: 91503
           Summary: ICE ira-build.i:17:1: error: shared rtx
           Product: gcc
           Version: 10.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: rtl-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: skpgkp2 at gmail dot com
                CC: crazylht at gmail dot com, hjl.tools at gmail dot com
  Target Milestone: ---

ICE when compile with gcc option "-O3  -mtune-ctrl=^inter_unit_moves_to_vec
-msse4.1"

$cat ira-build.i
typedef struct a *b;
struct a {
  b c}
;
d
  ;
e( f,  g) {
  int h, i;
  b j;
  i = g + 1;
  for (j = f; j ;
       j = j->c) 
    h = e( 1);
    if (h > i)
      i = h;
  return i;
}
static k() {
  d = e();
}
l() {
  k();
}


$gcc -S  -O3  -mtune-ctrl="^inter_unit_moves_to_vec"  ira-build.i  -msse4.1 -w
ira-build.i: In function \u2018l\u2019:
ira-build.i:23:1: error: invalid rtl sharing found in the insn
   23 | }
      | ^
(insn 57 56 15 4 (set (subreg:V4SI (reg:SI 96) 0)
        (vec_merge:V4SI (vec_duplicate:V4SI (mem/c:SI (plus:DI (reg/f:DI 19
frame)
                        (const_int -4 [0xfffffffffffffffc])) [0  S4 A32]))
            (const_vector:V4SI [
                    (const_int 0 [0]) repeated x4
                ])
            (const_int 1 [0x1]))) "ira-build.i":13:9 -1
     (nil))
ira-build.i:23:1: error: shared rtx
(mem/c:SI (plus:DI (reg/f:DI 19 frame)
        (const_int -4 [0xfffffffffffffffc])) [0  S4 A32])
during RTL pass: stv
ira-build.i:23:1: internal compiler error: internal consistency failure
0xa21114 verify_rtx_sharing
        /local/gccwork/gcc_trunk/gcc/gcc/emit-rtl.c:2927
0xa20feb verify_rtx_sharing
        /local/gccwork/gcc_trunk/gcc/gcc/emit-rtl.c:2942
0xa20feb verify_rtx_sharing
        /local/gccwork/gcc_trunk/gcc/gcc/emit-rtl.c:2942
0xa20feb verify_rtx_sharing
        /local/gccwork/gcc_trunk/gcc/gcc/emit-rtl.c:2942
0xa2143f verify_insn_sharing
        /local/gccwork/gcc_trunk/gcc/gcc/emit-rtl.c:3013
0xa24d67 verify_rtl_sharing()
        /local/gccwork/gcc_trunk/gcc/gcc/emit-rtl.c:3036
0xcb2ae9 execute_function_todo
        /local/gccwork/gcc_trunk/gcc/gcc/passes.c:2004
0xcb382e execute_todo
        /local/gccwork/gcc_trunk/gcc/gcc/passes.c:2037
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.