[Bug c++/65140] New: crash with function multiversioning and LTO

[Bug c++/65140] New: crash with function multiversioning and LTO

[jens.maurer at gmx dot net]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65140

            Bug ID: 65140
           Summary: crash with function multiversioning and LTO
           Product: gcc
           Version: 4.9.2
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: jens.maurer at gmx dot net

The first example for function multiversioning given at
https://gcc.gnu.org/wiki/FunctionMultiVersioning crashes when compiled with
-flto.


Reduced example:

__attribute__ ((target ("default")))
void foo() { }

__attribute__ ((target ("sse4.2")))
void foo() { }

int main ()
{
  foo();
}


Compiler output:

$ g++ -v -flto x.cc 
...
Target: x86_64-unknown-linux-gnu
Configured with: ../gcc-4.9.2/configure --enable-languages=c,c++
--with-system-zlib --enable-lto --with-abi=m64 --disable-multilib
Thread model: posix
gcc version 4.9.2 (GCC) 
...
x.cc: In function ‘foo() [clone .resolver]’:
x.cc:11:1: internal compiler error: Segmentation fault
 }
 ^
0x990c0f crash_signal
        ../../gcc-4.9.2/gcc/toplev.c:337
0x8bd90e tree_is_indexable
        ../../gcc-4.9.2/gcc/lto-streamer-out.c:139
0x8bf56f lto_output_tree(output_block*, tree_node*, bool, bool)
        ../../gcc-4.9.2/gcc/lto-streamer-out.c:1352
0x8bfc74 output_function
        ../../gcc-4.9.2/gcc/lto-streamer-out.c:1832
0x8bfc74 lto_output()
        ../../gcc-4.9.2/gcc/lto-streamer-out.c:2084
0x8f39a1 write_lto
        ../../gcc-4.9.2/gcc/passes.c:2298
0x8f6550 ipa_write_summaries_1
        ../../gcc-4.9.2/gcc/passes.c:2360
0x8f6550 ipa_write_summaries()
        ../../gcc-4.9.2/gcc/passes.c:2417
0x71eb2a ipa_passes
        ../../gcc-4.9.2/gcc/cgraphunit.c:2078
0x71eb2a compile()
        ../../gcc-4.9.2/gcc/cgraphunit.c:2174
0x71ece4 finalize_compilation_unit()
        ../../gcc-4.9.2/gcc/cgraphunit.c:2329
0x5d30a3 cp_write_global_declarations()
        ../../gcc-4.9.2/gcc/cp/decl2.c:4643
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.
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From: "zbeekman at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/65141] New: ISO_10646 constant parameters convert kind when used with substring references
Date: Fri, 20 Feb 2015 16:06:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?ide141

            Bug ID: 65141
           Summary: ISO_10646 constant parameters convert kind when used
                    with substring references
           Product: gcc
           Version: 4.9.2
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: fortran
          Assignee: unassigned at gcc dot gnu.org
          Reporter: zbeekman at gmail dot com

Substring references with ISO_10646 kind characters cause the resulting
expression to be DEFAULT kind rather than ISO_10646.

Reproducer:

program ISO_CONST_SUBST_PR
    implicit none
    integer, parameter :: UNICODE=selected_char_kind('ISO_10646')
    integer, parameter :: DEFAULT=selected_char_kind('DEFAULT')
    character(kind=UNICODE,len=*),parameter :: string='my string'

    write(*,'(A, I0, A, I0)') 'Unicode and default character kinds are:
',UNICODE,', ',DEFAULT
    write(*,'(A, I0)') 'kind(string) should be UNICODE and is UNICODE for me:
',kind(string)
    write(*,'(A, I0)') 'kind(string(2:4)) should be UNICODE and is DEFAULT for
me: ',kind(string(2:4))
end program ISO_CONST_SUBST_PR

[Bug c++/65140] crash with function multiversioning and LTO

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65140

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|---                         |DUPLICATE

--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Works with GCC 5 and 4.9.3.

*** This bug has been marked as a duplicate of bug 64373 ***