[Bug ipa/97243] New: [11 Regression] ICE in compute_parm_map at gcc/ipa-modref.c:1368 since r11-3478-gada353b87909fd6c

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97243

            Bug ID: 97243
           Summary: [11 Regression] ICE in compute_parm_map at
                    gcc/ipa-modref.c:1368 since r11-3478-gada353b87909fd6c
           Product: gcc
           Version: 11.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code
          Severity: normal
          Priority: P3
         Component: ipa
          Assignee: unassigned at gcc dot gnu.org
          Reporter: marxin at gcc dot gnu.org
                CC: hubicka at gcc dot gnu.org, marxin at gcc dot gnu.org
  Target Milestone: ---

The following fails:

$ cat fp.c
float fma_test1(float a, float b, float c) {
  float x = a * b + c;
  return x;
}
float fma_test2(float a, float b, float c) {
  float x = a * b + c;
  return x;
}

$ gcc fp.c -c -fipa-modref -fipa-icf
during IPA pass: modref
fp.c:8:1: internal compiler error: Segmentation fault
    8 | }
      | ^
0xda1cef crash_signal
        /home/marxin/Programming/gcc/gcc/toplev.c:329
0x7ffff788652f ???
       
/usr/src/debug/glibc-2.31-6.3.x86_64/signal/../sysdeps/unix/sysv/linux/x86_64/sigaction.c:0
0xb97b0c compute_parm_map
        /home/marxin/Programming/gcc/gcc/ipa-modref.c:1368
0xb9a0e1 compute_parm_map
        /home/marxin/Programming/gcc/gcc/ipa-modref.c:1338
0xb9a0e1 modref_propagate_in_scc
        /home/marxin/Programming/gcc/gcc/ipa-modref.c:1603
0xb9a0e1 execute
        /home/marxin/Programming/gcc/gcc/ipa-modref.c:1680
0xb9a0e1 execute
        /home/marxin/Programming/gcc/gcc/ipa-modref.c:1659
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.