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

["asolokha at gmx dot com" <gcc-bugzilla@gcc.gnu.org>]

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

            Bug ID: 105459
           Summary: ICE: Segmentation fault (in record_operand_costs)
           Product: gcc
           Version: 12.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code
          Severity: normal
          Priority: P3
         Component: rtl-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: asolokha at gmx dot com
  Target Milestone: ---

gcc 12.0.1 20220424 snapshot (g:6b7441a46c771aa6ecdc0c8ed96197417d036b9a) ICEs
when compiling the following testcase w/ -O1 -flto:

double m;
int n;

__attribute__ ((optimize ("-funsafe-math-optimizations"))) void
bar (int x)
{
  n = x;
  m = n;
}

__attribute__ ((flatten)) void
foo (int x)
{
  bar (x);
}

void
quux (void)
{
  ++n;
}

int
main (void)
{
  foo (0);
  quux ();

  return 0;
}

% x86_64-unknown-linux-gnu-gcc-12.0.1 -O1 -flto qnipdldf.c
during RTL pass: ira
qnipdldf.c: In function 'main':
qnipdldf.c:30:1: internal compiler error: Segmentation fault
   30 | }
      | ^
0xd95abf crash_signal
       
/var/tmp/portage/sys-devel/gcc-12.0.1_p20220424/work/gcc-12-20220424/gcc/toplev.cc:322
0xbabeb8 record_operand_costs
       
/var/tmp/portage/sys-devel/gcc-12.0.1_p20220424/work/gcc-12-20220424/gcc/ira-costs.cc:1382
0xbac464 scan_one_insn
       
/var/tmp/portage/sys-devel/gcc-12.0.1_p20220424/work/gcc-12-20220424/gcc/ira-costs.cc:1507
0xbac464 process_bb_for_costs
       
/var/tmp/portage/sys-devel/gcc-12.0.1_p20220424/work/gcc-12-20220424/gcc/ira-costs.cc:1632
0xba2ae1 ira_traverse_loop_tree(bool, ira_loop_tree_node*, void
(*)(ira_loop_tree_node*), void (*)(ira_loop_tree_node*))
       
/var/tmp/portage/sys-devel/gcc-12.0.1_p20220424/work/gcc-12-20220424/gcc/ira-build.cc:1800
0xbad545 find_costs_and_classes
       
/var/tmp/portage/sys-devel/gcc-12.0.1_p20220424/work/gcc-12-20220424/gcc/ira-costs.cc:1728
0xbae639 ira_costs()
       
/var/tmp/portage/sys-devel/gcc-12.0.1_p20220424/work/gcc-12-20220424/gcc/ira-costs.cc:2276
0xba806c ira_build()
       
/var/tmp/portage/sys-devel/gcc-12.0.1_p20220424/work/gcc-12-20220424/gcc/ira-build.cc:3481
0xb9dd0c ira
       
/var/tmp/portage/sys-devel/gcc-12.0.1_p20220424/work/gcc-12-20220424/gcc/ira.cc:5760
0xb9dd0c execute
       
/var/tmp/portage/sys-devel/gcc-12.0.1_p20220424/work/gcc-12-20220424/gcc/ira.cc:6083
Please submit a full bug report, with preprocessed source (by using
-freport-bug).
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
lto-wrapper: fatal error: x86_64-unknown-linux-gnu-gcc-12.0.1 returned 1 exit
status
compilation terminated.
/usr/lib/gcc/x86_64-unknown-linux-gnu/12.0.1/../../../../x86_64-unknown-linux-gnu/bin/ld:
fatal error: lto-wrapper failed