[Bug c++/85421] New: [8 regression] internal compiler error: in ipa_propagate_frequency, at ipa-profile.c:405

["skpgkp1 at gmail dot com" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85421

            Bug ID: 85421
           Summary: [8 regression] internal compiler error: in
                    ipa_propagate_frequency, at ipa-profile.c:405
           Product: gcc
           Version: 8.0.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: skpgkp1 at gmail dot com
  Target Milestone: ---

Created attachment 43952
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=43952&action=edit
Preprocessed reproducer file.

This issue found while compiling HHVM sources. GCC 8 regressed with ICE between
04/10/2018 and 04/11/2018

ICE with 04/11/2018 compiler 

$g++ --version
g++ (GCC) 8.0.1 20180411 (experimental)
Copyright (C) 2018 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

$g++ -std=gnu++1y -O3   -o QCRAMCodec.cpp.o -c QCRAMCodec.cpp.i -w
during IPA pass: cp
QCRAMCodec.cpp.i:128:1: internal compiler error: in ipa_propagate_frequency, at
ipa-profile.c:405
 } // namespace bk
 ^
0x6ce400 ipa_propagate_frequency(cgraph_node*)
        ../../gcc-main.3V7F/gcc/ipa-profile.c:405
0xce6ca3 symbol_table::remove_unreachable_nodes(_IO_FILE*)
        ../../gcc-main.3V7F/gcc/ipa.c:701
0xdc7f09 execute_todo
        ../../gcc-main.3V7F/gcc/passes.c:2062
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.


Work fine with 04/10/2018 compiler.

$g++ --version
g++ (GCC) 8.0.1 20180410 (experimental)
Copyright (C) 2018 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

$g++ -std=gnu++1y -O3   -o QCRAMCodec.cpp.o -c QCRAMCodec.cpp.i -w
$ echo $?
0