[Bug ipa/123888] [16 Regression] Firefox 147 miscompilation with LTO+PGO on x86_64-linux

[jakub at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=123888

--- Comment #15 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
The ltrans2 ccp2 dump is still
  if (_101 ==
_ZThn24_N7mozilla3net13nsStandardURL16TemplatedMutatorIS1_E4InitEjiRK12nsTSubstringIcEPKcP6nsIURIPP13nsIURIMutator)
    goto <bb 30>; [100.00%]
  else
    goto <bb 37>; [0.00%]

  <bb 30> [count: 47149]:
  _233 = _96 + 18446744073709551592;
  _153 = MEM[(const struct RefPtr *)_233 + 16B].mRawPtr;
  if (_153 != 0B)
    goto <bb 31>; [0.00%]
  else
    goto <bb 32>; [100.00%]
...
  <bb 32> [count: 47149]:
  _154 = MEM[(struct TemplatedMutator
*)_233].D.6066.D.5807.D.5804.D.5801._vptr.nsISupports;
  _155 = MEM[(int (*__vtbl_ptr_type) () *)_154 + 200B];
  __builtin_unreachable ();