[Bug ipa/63909] New: ICE: SIGSEGV in ipa_icf_gimple::func_checker::compare_bb()

[Bug ipa/63909] New: ICE: SIGSEGV in ipa_icf_gimple::func_checker::compare_bb()

[zsojka at seznam dot cz]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63909

            Bug ID: 63909
           Summary: ICE: SIGSEGV in
                    ipa_icf_gimple::func_checker::compare_bb()
           Product: gcc
           Version: 5.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: ipa
          Assignee: unassigned at gcc dot gnu.org
          Reporter: zsojka at seznam dot cz

Created attachment 33998
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=33998&action=edit
reduced testcase

Compiler output:
$ gcc -O2 -fno-guess-branch-probability testcase.c                     
testcase.c:15:1: internal compiler error: Segmentation fault
 }
 ^
0xc662af crash_signal
        /mnt/svn/gcc-trunk/gcc/toplev.c:359
0x16ccf68 ipa_icf_gimple::func_checker::compare_bb(ipa_icf_gimple::sem_bb*,
ipa_icf_gimple::sem_bb*)
        /mnt/svn/gcc-trunk/gcc/ipa-icf-gimple.c:575
0x16c159e ipa_icf::sem_function::equals_private(ipa_icf::sem_item*,
hash_map<symtab_node*, ipa_icf::sem_item*, default_hashmap_traits>&)
        /mnt/svn/gcc-trunk/gcc/ipa-icf.c:484
0x16c1a63 ipa_icf::sem_function::equals_private(ipa_icf::sem_item*,
hash_map<symtab_node*, ipa_icf::sem_item*, default_hashmap_traits>&)
        /mnt/svn/gcc-trunk/gcc/ipa-icf.c:383
0x16c1a63 ipa_icf::sem_function::equals(ipa_icf::sem_item*,
hash_map<symtab_node*, ipa_icf::sem_item*, default_hashmap_traits>&)
        /mnt/svn/gcc-trunk/gcc/ipa-icf.c:384
0x16c3e6a ipa_icf::sem_item_optimizer::subdivide_classes_by_equality(bool)
        /mnt/svn/gcc-trunk/gcc/ipa-icf.c:1824
0x16c84fc ipa_icf::sem_item_optimizer::execute()
        /mnt/svn/gcc-trunk/gcc/ipa-icf.c:1643
0x16c8fa1 ipa_icf_driver
        /mnt/svn/gcc-trunk/gcc/ipa-icf.c:2373
0x16c8fa1 ipa_icf::pass_ipa_icf::execute(function*)
        /mnt/svn/gcc-trunk/gcc/ipa-icf.c:2421
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <http://gcc.gnu.org/bugs.html> for instructions.

Tested revisions:
r217624 - ICE

[Bug ipa/63909] [5 Regression] ICE: SIGSEGV in ipa_icf_gimple::func_checker::compare_bb()

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63909

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Priority|P3                          |P1
   Target Milestone|---                         |5.0
            Summary|ICE: SIGSEGV in             |[5 Regression] ICE: SIGSEGV
                   |ipa_icf_gimple::func_checke |in
                   |r::compare_bb()             |ipa_icf_gimple::func_checke
                   |                            |r::compare_bb()

[Bug ipa/63909] [5 Regression] ICE: SIGSEGV in ipa_icf_gimple::func_checker::compare_bb()

[trippels at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63909

Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2014-12-07
                 CC|                            |trippels at gcc dot gnu.org
     Ever confirmed|0                           |1

--- Comment #1 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
Also happens during Chromium build:

../../third_party/WebKit/Source/wtf/DefaultAllocator.cpp:53:1: internal
compiler error: Segmentation fault
0xc8098f crash_signal
        ../../gcc/gcc/toplev.c:358
0x129aac8 ipa_icf_gimple::func_checker::compare_bb(ipa_icf_gimple::sem_bb*,
ipa_icf_gimple::sem_bb*)
...

[Bug ipa/63909] [5 Regression] ICE: SIGSEGV in ipa_icf_gimple::func_checker::compare_bb()

[marxin at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63909

--- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
Author: marxin
Date: Wed Dec 10 14:07:47 2014
New Revision: 218578

URL: https://gcc.gnu.org/viewcvs?rev=218578&root=gcc&view=rev
Log:
PR ipa/63909

        * gimple-iterator.h (gsi_start_bb_nondebug): New function.
    * ipa-icf-gimple.c (func_checker::compare_bb): Correct iteration
    replaces loop based on precomputed number of non-debug statements.
    * gcc.dg/ipa/pr63909.c: New test.


Added:
    trunk/gcc/testsuite/gcc.dg/ipa/pr63909.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/gimple-iterator.h
    trunk/gcc/ipa-icf-gimple.c
    trunk/gcc/testsuite/ChangeLog
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63909

Martin Liška <marxin at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |FIXED

--- Comment #3 from Martin Liška <marxin at gcc dot gnu.org> ---
Fixed.
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Subject: [Bug go/57689] [4.8 Regression] ICE (segfault) building libgo on ia64-linux-gnu
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https://gcc.gnu.org/bugzilla/show_bug.cgi?idW689

--- Comment #7 from Matthias Klose <doko at gcc dot gnu.org> ---
sorry, can't say anymore. Debian dropped ia64, and I don't have access anymore
to any hardware.