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From: "jamborm at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug bootstrap/97319] New: LTO profiledbootstrap (C/C++/Fotran only)
 fails with a segfault in selftest
Date: Wed, 07 Oct 2020 12:56:04 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D97319

            Bug ID: 97319
           Summary: LTO profiledbootstrap (C/C++/Fotran only) fails with a
                    segfault in selftest
           Product: gcc
           Version: 11.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: bootstrap
          Assignee: unassigned at gcc dot gnu.org
          Reporter: jamborm at gcc dot gnu.org
                CC: hubicka at gcc dot gnu.org
  Target Milestone: ---
              Host: x86_64-linux
            Target: x86_64-linux

Since Honza's commit c33f4742393, attempting to LTO-profiledbootstrap
GCC, even when Ada is not enabled, fails in stageprofile with:

/home/mjambor/gcc/mine/b-obj/./gcc/xgcc -B/home/mjambor/gcc/mine/b-obj/./gc=
c/
-xc -nostdinc /dev/null -S -o /dev/null
-fself-test=3D/home/mjambor/gcc/mine/src/gcc/testsuite/selftests
In function =E2=80=98test_fn=E2=80=99:
cc1: internal compiler error: Segmentation fault
0x1770669 crash_signal
        /home/mjambor/gcc/mine/src/gcc/toplev.c:329
0xd86637 purge_dead_edges(basic_block_def*)
        /home/mjambor/gcc/mine/src/gcc/cfgrtl.c:3271
0x261dd78 find_bb_boundaries
        /home/mjambor/gcc/mine/src/gcc/cfgbuild.c:589
0x261f76f find_many_sub_basic_blocks(simple_bitmap_def*)
        /home/mjambor/gcc/mine/src/gcc/cfgbuild.c:672
0xd94a1a execute
        /home/mjambor/gcc/mine/src/gcc/cfgexpand.c:6675
0x26dd277 test_expansion_to_rtl
        /home/mjambor/gcc/mine/src/gcc/function-tests.c:609
0x26ddaad selftest::function_tests_c_tests()
        /home/mjambor/gcc/mine/src/gcc/function-tests.c:691
0x295bd86 selftest::run_tests()
        /home/mjambor/gcc/mine/src/gcc/selftest-run-tests.c:109
0x1774302 toplev::run_self_tests()
        /home/mjambor/gcc/mine/src/gcc/toplev.c:2381=