Bug 97319 - [11 Regression] LTO profiledbootstrap (C/C++/Fotran only) fails with a segfault in selftest
Summary: [11 Regression] LTO profiledbootstrap (C/C++/Fotran only) fails with a segfau...
Status: RESOLVED FIXED
Alias: None
Product: gcc
Classification: Unclassified
Component: bootstrap (show other bugs)
Version: 11.0
: P1 normal
Target Milestone: 11.0
Assignee: Not yet assigned to anyone
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2020-10-07 12:56 UTC by Martin Jambor
Modified: 2020-10-09 11:06 UTC (History)
2 users (show)

See Also:
Host: x86_64-linux
Target: x86_64-linux
Build:
Known to work: 10.2.0
Known to fail: 11.0
Last reconfirmed: 2020-10-07 00:00:00


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Description Martin Jambor 2020-10-07 12:56:04 UTC
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/./gcc/ -xc -nostdinc /dev/null -S -o /dev/null -fself-test=/home/mjambor/gcc/mine/src/gcc/testsuite/selftests
In function ‘test_fn’:
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
Comment 1 Martin Liška 2020-10-09 11:06:44 UTC
The current master is fine, likely fixed with g:ffe8baa996486fa0313aa804a064a58b0b161f07.