[Bug tree-optimization/103121] [12 Regression] Warnings in cp/optimize.c causing build failure

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103121

--- Comment #8 from Martin Sebor <msebor at gcc dot gnu.org> ---
The [1, 1] range comes from a call to qry->range_of_expr (vr, exp, stmt) in in
get_size_range() in pointer-query.cc:

(gdb) p debug(gimple_bb(stmt))
<bb 4> [local count: 118111600]:
_4 = _1 + 1;
grp_name_37 = __builtin_alloca (_4);
p_38 = _32->identifier.id.str;
q_39 = _35->identifier.id.str;
if (_1 != 0)
  goto <bb 16>; [89.00%]
else
  goto <bb 12>; [11.00%]

$3 = void
(gdb) n    
326           max = wi::to_wide (vr.max ());
(gdb) p range_type
$4 = VR_RANGE
(gdb) p debug_tree(vr.min())
 <integer_cst 0x7ffff6da91e0 type <integer_type 0x7ffff78b69d8 size_t> constant
1>
$5 = void
(gdb) p debug_tree(vr.max())
 <integer_cst 0x7ffff6da91e0 type <integer_type 0x7ffff78b69d8 size_t> constant
1>
$6 = void
(gdb) up
#1  0x0000000001513720 in gimple_call_alloc_size (stmt=0x7ffff4c23d80, 
    rng1=0x7fffffffc980, qry=0x7fffffffd8a0)
    at /src/gcc/master/gcc/pointer-query.cc:506
506         if (!get_size_range (qry, size, stmt, r, SR_ALLOW_ZERO |
SR_USE_LARGEST))
(gdb) 
#2  0x000000000151a68c in handle_ssa_name (ptr=0x7ffff4d0ebd0, addr=false, 
    ostype=1, pref=0x7fffffffd230, snlim=..., qry=0x7fffffffd978)
    at /src/gcc/master/gcc/pointer-query.cc:2088
2088          if (gimple_call_alloc_size (stmt, wr, rvals))
(gdb) 
#3  0x000000000151bd4c in compute_objsize_r (ptr=0x7ffff4d0ebd0, 
    stmt=0x7ffff4de2730, addr=false, ostype=1, pref=0x7fffffffd230, 
    snlim=..., qry=0x7fffffffd978)
    at /src/gcc/master/gcc/pointer-query.cc:2380
2380          return handle_ssa_name (ptr, addr, ostype, pref, snlim, qry);
(gdb) 
#4  0x0000000001519e17 in handle_mem_ref (mref=0x7ffff47f8a00, 
    stmt=0x7ffff4de2730, ostype=1, pref=0x7fffffffd230, snlim=..., 
    qry=0x7fffffffd978) at /src/gcc/master/gcc/pointer-query.cc:1976
1976      if (!compute_objsize_r (mrefop, stmt, false, ostype, pref, snlim,
qry))
(gdb) 
#5  0x000000000151b844 in compute_objsize_r (ptr=0x7ffff47f8a00, 
    stmt=0x7ffff4de2730, addr=false, ostype=1, pref=0x7fffffffd230, 
    snlim=..., qry=0x7fffffffd978)
    at /src/gcc/master/gcc/pointer-query.cc:2314
2314          return handle_mem_ref (ptr, stmt, ostype, pref, snlim, qry);
(gdb) 
#6  0x000000000151befc in compute_objsize (ptr=0x7ffff47f8a00, 
    stmt=0x7ffff4de2730, ostype=1, pref=0x7fffffffd230, 
    ptr_qry=0x7fffffffd978) at /src/gcc/master/gcc/pointer-query.cc:2414
2414      if (!compute_objsize_r (ptr, stmt, false, ostype, pref, snlim,
ptr_qry))
(gdb) 
#7  0x000000000192c0df in strlen_pass::maybe_warn_overflow (
    this=0x7fffffffd880, stmt=0x7ffff4de2730, call_lhs=true, 
    len=0x7ffff78ff4e0, si=0x0, plus_one=false, rawmem=false)
    at /src/gcc/master/gcc/tree-ssa-strlen.c:2038
2038      tree destsize = compute_objsize (dest, stmt, ostype, &aref,
&ptr_qry);
(gdb) dg stmt
# .MEM_53 = VDEF <.MEM_36>
*grp_name_37 = 0;
$7 = (gimple *) 0x7ffff4de2730