[Bug rtl-optimization/105459] ICE: Segmentation fault (in record_operand_costs)

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105459

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |hubicka at gcc dot gnu.org,
                   |                            |rguenth at gcc dot gnu.org
             Target|                            |x86_64-*-* i?86-*-*

--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Huh.

#1  0x000000000100602f in record_operand_costs (insn=0x7ffff652d280, pref=0x0)
    at /home/rguenther/src/gcc-12-branch/gcc/ira-costs.cc:1382
1382          memcpy (op_costs[i], init_cost, struct_costs_size);
(gdb) l
1377         for any allocnos, doing it twice if some pair of operands are
1378         commutative.  */
1379      for (i = 0; i < recog_data.n_operands; i++)
1380        {
1381          rtx op_mem = extract_mem_from_operand (recog_data.operand[i]);
1382          memcpy (op_costs[i], init_cost, struct_costs_size);
1383
gdb) p this_target_ira_int->x_init_cost
$7 = (costs *) 0x0

we fail to invoke ira_init_costs for the cgraph node when we switch targets.

#0  restore_target_globals (g=0x7ffff6523cf0)
    at /home/rguenther/src/gcc-12-branch/gcc/target-globals.h:88
#1  0x0000000002987161 in save_target_globals ()
    at /home/rguenther/src/gcc-12-branch/gcc/target-globals.cc:87
#2  0x00000000029871e8 in save_target_globals_default_opts ()
    at /home/rguenther/src/gcc-12-branch/gcc/target-globals.cc:113
#3  0x0000000001910882 in ix86_set_current_function (fndecl=
    <function_decl 0x7ffff6346600 main>)
    at /home/rguenther/src/gcc-12-branch/gcc/config/i386/i386-options.cc:3241
#4  0x0000000000df8000 in invoke_set_current_function_hook (
    fndecl=<function_decl 0x7ffff6346600 main>)
    at /home/rguenther/src/gcc-12-branch/gcc/function.cc:4702
#5  0x0000000000df8374 in allocate_struct_function (
    fndecl=<function_decl 0x7ffff6346600 main>, abstract_p=false)
    at /home/rguenther/src/gcc-12-branch/gcc/function.cc:4825
#6  0x0000000000df867b in push_struct_function (
    fndecl=<function_decl 0x7ffff6346600 main>)
    at /home/rguenther/src/gcc-12-branch/gcc/function.cc:4891
#7  0x00000000010905d0 in input_function (
    fn_decl=<function_decl 0x7ffff6346600 main>, data_in=0x3f36e50, 
    ib=0x7fffffffd920, ib_cfg=0x7fffffffd900, 
    node=<cgraph_node * 0x7ffff6349000 "main"/5>)
    at /home/rguenther/src/gcc-12-branch/gcc/lto-streamer-in.cc:1386

not sure when we are supposed to initialize costs here?