[Bug ipa/81261] New: [8 Regression] ICE with -fno-guess-branch-probability

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81261

            Bug ID: 81261
           Summary: [8 Regression] ICE with -fno-guess-branch-probability
           Product: gcc
           Version: 7.0
            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: marxin at gcc dot gnu.org
  Target Milestone: ---

Probably staring from Honza's commit, I see:

$ ./xg++ -B. /home/marxin/Programming/gcc/gcc/testsuite/g++.dg/ipa/pr61160-1.C
-O1 -fno-guess-branch-probability

/home/marxin/Programming/gcc/gcc/testsuite/g++.dg/ipa/pr61160-1.C: In member
function ‘virtual void* CExample::_ZThn8_N8CExample9MixinFuncEiPv(int, void*)’:
/home/marxin/Programming/gcc/gcc/testsuite/g++.dg/ipa/pr61160-1.C:14:9:
internal compiler error: in to_reg_br_prob_base, at profile-count.h:189
   void *MixinFunc (int arg, void *arg2)
         ^~~~~~~~~
0xe1d414 profile_probability::to_reg_br_prob_base() const
        ../../gcc/profile-count.h:189
0xf9349d estimate_bb_frequencies(bool)
        ../../gcc/predict.c:3558
0xf94152 rebuild_frequencies()
        ../../gcc/predict.c:3854
0xf77694 execute_function_todo
        ../../gcc/passes.c:1970
0xf76750 do_per_function
        ../../gcc/passes.c:1655
0xf7795e execute_todo
        ../../gcc/passes.c:2043
0xf77edd execute_one_ipa_transform_pass
        ../../gcc/passes.c:2240
0xf78018 execute_all_ipa_transforms()
        ../../gcc/passes.c:2276
0xba0b1f cgraph_node::expand()
        ../../gcc/cgraphunit.c:2042
0xba22ca expand_all_functions
        ../../gcc/cgraphunit.c:2185
0xba22ca symbol_table::compile()
        ../../gcc/cgraphunit.c:2542
0xba4a16 symbol_table::compile()
        ../../gcc/cgraphunit.c:2635
0xba4a16 symbol_table::finalize_compilation_unit()
        ../../gcc/cgraphunit.c:2632