[Bug c/56716] New: during gcc 4.8.0 build on Cygwin: bid128_fma.c:4460:1: internal compiler error: Segmentation fault

[Bug c/56716] New: during gcc 4.8.0 build on Cygwin: bid128_fma.c:4460:1: internal compiler error: Segmentation fault

[pen7cmc at yahoo dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56716

             Bug #: 56716
           Summary: during gcc 4.8.0 build on Cygwin:
                    bid128_fma.c:4460:1: internal compiler error:
                    Segmentation fault
    Classification: Unclassified
           Product: gcc
           Version: 4.8.0
            Status: UNCONFIRMED
          Severity: blocker
          Priority: P3
         Component: c
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: pen7cmc@yahoo.com


Created attachment 29715
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=29715
pre-processed file bid128_fma.i

While building gcc 4.8.0 on Cygwin [CYGWIN_NT-6.1-WOW64 1.7.17(0.262/5/3)], the
compile stops with
../../../libgcc/config/libbid/bid128_fma.c:4460:1: internal compiler error:
Segmentation fault


prompt% /usr/tmp/gcc-4.8.0/objdir/./gcc/xgcc -v
Using built-in specs.
COLLECT_GCC=/usr/tmp/gcc-4.8.0/objdir/./gcc/xgcc
Target: i686-pc-cygwin
Configured with: ../configure --prefix=/usr/local/gcc/480/
--enable-version-specific-runtime-libs
Thread model: single
gcc version 4.8.0 (GCC)


make[4]: Leaving directory `/usr/tmp/gcc-4.8.0/objdir/i686-pc-cygwin/libgcc'
/usr/tmp/gcc-4.8.0/objdir/./gcc/xgcc -B/usr/tmp/gcc-4.8.0/objdir/./gcc/
-B/usr/local/gcc/480/i686-pc-cygwin/bin/
-B/usr/local/gcc/480/i686-pc-cygwin/lib/ -isystem
/usr/local/gcc/480/i686-pc-cygwin/include -isystem
/usr/local/gcc/480/i686-pc-cygwin/sys-include    -g -O2 -O2
-I../../../libgcc/../winsup/w32api/include -I../../../libgcc/../winsup/include 
-I../../../libgcc/../winsup/cygwin/include -g -O2 -DIN_GCC   -W -Wall
-Wno-narrowing -Wwrite-strings -Wcast-qual -Wstrict-prototypes
-Wmissing-prototypes -Wold-style-definition  -isystem ./include    -g
-DIN_LIBGCC2  -fbuilding-libgcc -fno-stack-protector     -I. -I. -I../.././gcc 
-I../../../libgcc -I../../../libgcc/. -I../../../libgcc/../gcc 
-I../../../libgcc/../include -I../../../libgcc/config/libbid
-DENABLE_DECIMAL_BID_FORMAT -DHAVE_CC_TLS -DUSE_EMUTLS -o bid_from_int.o -MT
bid_from_int.o -MD -MP -MF bid_from_int.dep -c
../../../libgcc/config/libbid/bid_from_int.c
../../../libgcc/config/libbid/bid128_fma.c:4460:1: internal compiler error:
Segmentation fault
 }
 ^
Please submit a full bug report,
with preprocessed source if appropriate.

[Bug c/56716] during gcc 4.8.0 build on Cygwin: bid128_fma.c:4460:1: internal compiler error: Segmentation fault

[pen7cmc at yahoo dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56716

pen7cmc at yahoo dot com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Severity|blocker                     |major

[Bug target/56716] during gcc 4.8.0 build on Cygwin: bid128_fma.c:4460:1: internal compiler error: Segmentation fault

[aldot at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56716

Bernhard Reutner-Fischer <aldot at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Target|i686-pc-cygwin              |i686-pc-cygwin,
                   |                            |x86_64-unknown-linux-gnu
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2013-03-27
                 CC|                            |aldot at gcc dot gnu.org
     Ever Confirmed|0                           |1
      Known to fail|                            |4.9.0

--- Comment #1 from Bernhard Reutner-Fischer <aldot at gcc dot gnu.org> 2013-03-27 12:43:23 UTC ---
same thing on current trunk @ targeting x86_64-unknown-linux-gnu:

$ /scratch/obj.x86_64/gcc-4.9.orig/./gcc/xgcc -v
Using built-in specs.
COLLECT_GCC=/scratch/obj.x86_64/gcc-4.9.orig/./gcc/xgcc
Target: x86_64-unknown-linux-gnu
Configured with: ../../src/gcc-4.9.orig/configure -v
--enable-languages=c,lto,fortran,c++,go LD=ld CFLAGS='-O2 -g3 -ggdb3
-fdump-ipa-all-all-all -fdump-tree-all-all-all -fdump-rtl-all-all'
CXXFLAGS='-O2 -g3 -ggdb3 -fdump-ipa-all-all-all -fdump-tree-all-all-all
-fdump-rtl-all-all' 'BOOT_CFLAGS=-O2 ' 'BOOT_CXXFLAGS=-O2 '
'CFLAGS_FOR_TARGET=-Og -g3 -ggdb3 -fdump-ipa-all-all-all
-fdump-tree-all-all-all -fdump-rtl-all-all' 'CXXFLAGS_FOR_TARGET=-Og -g3 -ggdb3
-fdump-ipa-all-all-all -fdump-tree-all-all-all -fdump-rtl-all-all' --prefix=/
--enable-shared --with-system-zlib --enable-nls --without-included-gettext
--enable-threads=posix --program-suffix=-4.9.orig-HEAD
--with-build-config='bootstrap-asan bootstrap-lto' --enable-__cxa_atexit
--enable-libstdcxx-allocator=mt --enable-clocale=gnu --enable-libstdcxx-debug
--enable-mpfr --disable-werror --enable-checking=yes --enable-debug -C
--disable-intermodule --disable-libstdcxx-pch --disable-multilib
--enable-bootstrap --enable-checking=release --with-cpu=native
--with-tune=native --enable-plugin
Thread model: posix
gcc version 4.9.0 20130327 (experimental) [fixups revision
2e9f00a:a9591cc:d18af62e3808d9860cf2a36c41367b3b3e8e3fa9] (GCC)

/scratch/obj.x86_64/gcc-4.9.orig/./gcc/xgcc
-B/scratch/obj.x86_64/gcc-4.9.orig/./gcc/ -B//x86_64-unknown-linux-gnu/bin/
-B//x86_64-unknown-linux-gnu/lib/ -isystem //x86_64-unknown-linux-gnu/include
-isystem //x86_64-unknown-linux-gnu/sys-include    -Og -g3 -ggdb3
-fdump-ipa-all-all-all -fdump-tree-all-all-all -fdump-rtl-all-all -O2  -Og -g3
-ggdb3 -fdump-ipa-all-all-all -fdump-tree-all-all-all -fdump-rtl-all-all
-DIN_GCC   -W -Wall -Wno-narrowing -Wwrite-strings -Wcast-qual
-Wstrict-prototypes -Wmissing-prototypes -Wold-style-definition  -isystem
./include   -fpic -mlong-double-80 -g -DIN_LIBGCC2 -fbuilding-libgcc
-fno-stack-protector   -fpic -mlong-double-80 -I. -I. -I../.././gcc
-I../../../../src/gcc-4.9.orig/libgcc -I../../../../src/gcc-4.9.orig/libgcc/.
-I../../../../src/gcc-4.9.orig/libgcc/../gcc
-I../../../../src/gcc-4.9.orig/libgcc/../include
-I../../../../src/gcc-4.9.orig/libgcc/config/libbid -DENABLE_DECIMAL_BID_FORMAT
-DHAVE_CC_TLS  -DUSE_TLS -o bid128_fma.o -MT bid128_fma.o -MD -MP -MF
bid128_fma.dep -c
../../../../src/gcc-4.9.orig/libgcc/config/libbid/bid128_fma.c
../../../../src/gcc-4.9.orig/libgcc/config/libbid/bid128_fma.c: In function
‘add_and_round’:
../../../../src/gcc-4.9.orig/libgcc/config/libbid/bid128_fma.c:4460:1: internal
compiler error: Segmentation fault
 }
 ^
0x9d8a50 crash_signal
        ../../../src/gcc-4.9.orig/gcc/toplev.c:332
0xb2572d perform_var_substitution
        ../../../src/gcc-4.9.orig/gcc/tree-ssa-structalias.c:2299
0xb2f97b solve_constraints
        ../../../src/gcc-4.9.orig/gcc/tree-ssa-structalias.c:6659
0xb2fd7b compute_points_to_sets
        ../../../src/gcc-4.9.orig/gcc/tree-ssa-structalias.c:6755
0xb30460 compute_may_aliases()
        ../../../src/gcc-4.9.orig/gcc/tree-ssa-structalias.c:6905
0x8fb395 execute_function_todo
        ../../../src/gcc-4.9.orig/gcc/passes.c:1941
0x8fa7b9 do_per_function
        ../../../src/gcc-4.9.orig/gcc/passes.c:1701
0x8fb444 execute_todo
        ../../../src/gcc-4.9.orig/gcc/passes.c:1996
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.
make[3]: *** [bid128_fma.o] Error 1
make[3]: Leaving directory
`/scratch/obj.x86_64/gcc-4.9.orig/x86_64-unknown-linux-gnu/libgcc'
make[2]: *** [all-stage1-target-libgcc] Error 2
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/43434] Missed vectorization: "not vectorized: data ref analysis": pointer incremented by a parameter
Date: Wed, 27 Mar 2013 12:45:00 -0000
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http://gcc.gnu.org/bugzilla/show_bug.cgi?idC434

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |ASSIGNED
   Last reconfirmed|                            |2013-03-27
             Blocks|                            |37021
         AssignedTo|unassigned at gcc dot       |rguenth at gcc dot gnu.org
                   |gnu.org                     |
     Ever Confirmed|0                           |1

--- Comment #7 from Richard Biener <rguenth at gcc dot gnu.org> 2013-03-27 12:45:02 UTC ---
Confirmed.  We for example have

t.c:39: note: Build SLP failed: not grouped load _46 = *pix_1;

as we fail to detect groups for

  _46 = *pix_1;
  _49 = MEM[(unsigned char *)pix_1 + 1B];
  _52 = MEM[(unsigned char *)pix_1 + 2B];
...

as the step is not integral.  That is, this is a strided-load SLP group.

I am working on a patch for this.  This is one reason why PR37021 is not
vectorized in the best possible way.

[Bug target/56716] during gcc 4.8.0 build on Cygwin: bid128_fma.c:4460:1: internal compiler error: Segmentation fault

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56716

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |ASSIGNED
         AssignedTo|unassigned at gcc dot       |rguenth at gcc dot gnu.org
                   |gnu.org                     |

--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> 2013-03-27 13:46:50 UTC ---
Mine. I can only reproduce this with -fdump-tree-all-all though, so I doubt
this is the original issue.

[Bug target/56716] during gcc 4.8.0 build on Cygwin: bid128_fma.c:4460:1: internal compiler error: Segmentation fault

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56716

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |NEW
         AssignedTo|rguenth at gcc dot gnu.org  |unassigned at gcc dot
                   |                            |gnu.org

--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> 2013-03-27 15:12:09 UTC ---
Author: rguenth
Date: Wed Mar 27 15:10:50 2013
New Revision: 197165

URL: http://gcc.gnu.org/viewcvs?rev=197165&root=gcc&view=rev
Log:
2013-03-27  Richard Biener  <rguenther@suse.de>

    PR tree-optimization/56716
    * tree-ssa-structalias.c (perform_var_substitution): Adjust
    dumping for ref nodes.

Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/tree-ssa-structalias.c

Fixed the issue on trunk.  Back to analysis.

[Bug target/56716] during gcc 4.8.0 build on Cygwin: bid128_fma.c:4460:1: internal compiler error: Segmentation fault

[gccbugzilla@tru-traffic.com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56716

Greg <gccbugzilla@tru-traffic.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |gccbugzilla@tru-traffic.com

--- Comment #4 from Greg <gccbugzilla@tru-traffic.com> 2013-04-24 23:53:15 UTC ---
(In reply to comment #3)
> Author: rguenth
> Date: Wed Mar 27 15:10:50 2013
> New Revision: 197165
> 
> URL: http://gcc.gnu.org/viewcvs?rev=197165&root=gcc&view=rev
> Log:
> 2013-03-27  Richard Biener  <rguenther@suse.de>
> 
>     PR tree-optimization/56716
>     * tree-ssa-structalias.c (perform_var_substitution): Adjust
>     dumping for ref nodes.
> 
> Modified:
>     trunk/gcc/ChangeLog
>     trunk/gcc/tree-ssa-structalias.c
> 
> Fixed the issue on trunk.  Back to analysis.

I get the same error, and merging revision 197165 from trunk into my
working-directory for gcc-4_8-branch revision 198253 did not fix the error on
my system.

This error occured during one of the stages while building gcc, revision
198065, checked out from svn://gcc.gnu.org/svn/gcc/branches/gcc-4_8-branch for
MinGW32, Windows 7 Pro 64-bit SP1.
The error also occurs with revisions 198027 and 198253 -- that is, the error
has been occuring with revisions for at least these past 7 days.

The error persists after I merged revision 197165 from trunk into my
working-directory for gcc-4_8-branch revision 198253.

[Bug target/56716] during gcc 4.8.0 build on Cygwin: bid128_fma.c:4460:1: internal compiler error: Segmentation fault

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56716

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |WAITING

--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> 2013-04-25 08:06:47 UTC ---
(In reply to comment #4)
> (In reply to comment #3)
> > Author: rguenth
> > Date: Wed Mar 27 15:10:50 2013
> > New Revision: 197165
> > 
> > URL: http://gcc.gnu.org/viewcvs?rev=197165&root=gcc&view=rev
> > Log:
> > 2013-03-27  Richard Biener  <rguenther@suse.de>
> > 
> >     PR tree-optimization/56716
> >     * tree-ssa-structalias.c (perform_var_substitution): Adjust
> >     dumping for ref nodes.
> > 
> > Modified:
> >     trunk/gcc/ChangeLog
> >     trunk/gcc/tree-ssa-structalias.c
> > 
> > Fixed the issue on trunk.  Back to analysis.
> 
> I get the same error, and merging revision 197165 from trunk into my
> working-directory for gcc-4_8-branch revision 198253 did not fix the error on
> my system.
> 
> This error occured during one of the stages while building gcc, revision
> 198065, checked out from svn://gcc.gnu.org/svn/gcc/branches/gcc-4_8-branch for
> MinGW32, Windows 7 Pro 64-bit SP1.
> The error also occurs with revisions 198027 and 198253 -- that is, the error
> has been occuring with revisions for at least these past 7 days.
> 
> The error persists after I merged revision 197165 from trunk into my
> working-directory for gcc-4_8-branch revision 198253.

That's expected as the issue I fixed on trunk was not present on the 4.8
branch.  Which is why I didn't close this bug.  But as I cannot reproduce
it I rely on others for investigation.

Can you please provide a backtrace from the crash?

[Bug target/56716] during gcc 4.8.0 build on Cygwin: bid128_fma.c:4460:1: internal compiler error: Segmentation fault

[gccbugzilla@tru-traffic.com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56716

--- Comment #6 from Greg <gccbugzilla@tru-traffic.com> 2013-04-25 22:32:13 UTC ---
> Can you please provide a backtrace from the crash?

I'll be happy to provide a backtrace from the crash.  It will take a day or so,
as I'm such a novice that I don't yet know how to create a backtrace.

In the meantime, here's a new development: The build that crashed was launched
using

make BOOT_CFLAGS='-O' bootstrap

Thinking that I'd need to remove the BOOT_CFLAGS='-O' in order to create a
backtrace, I rebuilt using simply

make bootstrap

Only this time, the bootstrap built to successful completion -- no crash.

This used revision 198253 with no changes (that is, I'd first reverted from my
working-directory the revision 197165 merged from trunk).

Any tips for a novice on how to create a backtrace from the crashed build?

[Bug target/56716] during gcc 4.8.0 build on Cygwin: bid128_fma.c:4460:1: internal compiler error: Segmentation fault

[gccbugzilla@tru-traffic.com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56716

--- Comment #7 from Greg <gccbugzilla@tru-traffic.com> 2013-04-27 16:16:02 UTC ---
(In reply to comment #6)
> > Can you please provide a backtrace from the crash?

Alas, no success.  gdb reports "No stack." after the crash.  I'd used

make BOOT_CFLAGS='-g -O' bootstrap

I'm happy to help if I can.  Any suggestions on what more I can do?

[Bug target/56716] during gcc 4.8.0 build on Cygwin: bid128_fma.c:4460:1: internal compiler error: Segmentation fault

[gccbugzilla@tru-traffic.com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56716

--- Comment #8 from Greg <gccbugzilla@tru-traffic.com> 2013-04-27 21:54:25 UTC ---
(In reply to comment #7)
> (In reply to comment #6)
> > > Can you please provide a backtrace from the crash?
> 
> Alas, no success.  gdb reports "No stack." after the crash.  I'd used
> 
> make BOOT_CFLAGS='-g -O' bootstrap
> 
> I'm happy to help if I can.  Any suggestions on what more I can do?

To be more complete, here's the entire set of commands that I entered, along
with the screen output (which is abbreviated for most of the build):

$ make BOOT_CFLAGS='-g -O' bootstrap

...(redacted)

/home/gbullock/gcc48o/./gcc/xgcc -B/home/gbullock/gcc48o/./gcc/
-L/home/gbullock/gcc48o/i686-pc-mingw32/winsup/mingw
-L/home/gbullock/gcc48o/i686-pc-mingw32/winsup/w32api/lib -isystem
/home/gbullock/gcc-4_8/winsup/mingw/
include -isystem /home/gbullock/gcc-4_8/winsup/w32api/include
-B/usr/local/i686-pc-mingw32/bin/ -B/usr/local/i686-pc-mingw32/lib/ -isystem
/usr/local/i686-pc-mingw32/include -isystem
/usr/local/i686-pc-mingw32/sys-includ
e    -g -O2 -O2 -I../../../gcc-4_8/libgcc/../winsup/w32api/include -g -O2
-DIN_GCC   -W -Wall -Wno-narrowing -Wwrite-strings -Wcast-qual
-Wstrict-prototypes -Wmissing-prototypes -Wold-style-definition  -isystem
./include
   -g -DIN_LIBGCC2 -fbuilding-libgcc -fno-stack-protector   -I. -I.
-I../.././gcc -I../../../gcc-4_8/libgcc -I../../../gcc-4_8/libgcc/.
-I../../../gcc-4_8/libgcc/../gcc -I../../../gcc-4_8/libgcc/../include
-I../../../gcc
-4_8/libgcc/config/libbid -DENABLE_DECIMAL_BID_FORMAT -DHAVE_CC_TLS
-DUSE_EMUTLS -o bid128_fma.o -MT bid128_fma.o -MD -MP -MF bid128_fma.dep -c
../../../gcc-4_8/libgcc/config/libbid/bid128_fma.c
../../../gcc-4_8/libgcc/config/libbid/bid128_fma.c:4460:1: internal compiler
error: Segmentation fault
 }
 ^
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.
make[3]: *** [bid128_fma.o] Error 1
make[3]: Leaving directory `/home/gbullock/gcc48o/i686-pc-mingw32/libgcc'
make[2]: *** [all-stage2-target-libgcc] Error 2
make[2]: Leaving directory `/home/gbullock/gcc48o'
make[1]: *** [stage2-bubble] Error 2
make[1]: Leaving directory `/home/gbullock/gcc48o'
make: *** [bootstrap] Error 2

$ cd /home/gbullock/gcc48o/i686-pc-mingw32/libgcc
$ export PATH=/home/gbullock/gcc48o/./gcc/:$PATH
$ gdb /home/gbullock/gcc48o/./gcc/xgcc
GNU gdb (GDB) 7.5
Copyright (C) 2012 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "i686-pc-mingw32".
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>...
Reading symbols from
C:\MinGW\msys\1.0\home\gbullock\gcc48o\gcc\xgcc.exe...done.
(gdb) set args -B/home/gbullock/gcc48o/./gcc/
-L/home/gbullock/gcc48o/i686-pc-mingw32/winsup/mingw
-L/home/gbullock/gcc48o/i686-pc-mingw32/winsup/w32api/lib -isystem
/home/gbullock/gcc-4_8/winsup/mingw/include -isystem
/home/gbullock/gcc-4_8/winsup/w32api/include -B/usr/local/i686-pc-mingw32/bin/
-B/usr/local/i686-pc-mingw32/lib/ -isystem /usr/local/i686-pc-mingw32/include
-isystem /usr/local/i686-pc-mingw32/sys-include    -g -O2 -O2
-I../../../gcc-4_8/libgcc/../winsup/w32api/include -g -O2 -DIN_GCC   -W -Wall
-Wno-narrowing -Wwrite-strings -Wcast-qual -Wstrict-prototypes
-Wmissing-prototypes -Wold-style-definition  -isystem ./include   -g
-DIN_LIBGCC2 -fbuilding-libgcc -fno-stack-protector   -I. -I. -I../.././gcc
-I../../../gcc-4_8/libgcc -I../../../gcc-4_8/libgcc/.
-I../../../gcc-4_8/libgcc/../gcc -I../../../gcc-4_8/libgcc/../include
-I../../../gcc-4_8/libgcc/config/libbid -DENABLE_DECIMAL_BID_FORMAT
-DHAVE_CC_TLS -DUSE_EMUTLS -o bid128_fma.o -MT bid128_fma.o -MD -MP -MF
bid128_fma.dep -c ../../../gcc-4_8/libgcc/config/libbid/bid128_fma.c
(gdb) run
Starting program: C:\MinGW\msys\1.0\home\gbullock\gcc48o\gcc\xgcc.exe
-B/home/gbullock/gcc48o/./gcc/
-L/home/gbullock/gcc48o/i686-pc-mingw32/winsup/mingw
-L/home/gbullock/gcc48o/i686-pc-mingw32/winsup/w32api/lib -isystem
 /home/gbullock/gcc-4_8/winsup/mingw/include -isystem
/home/gbullock/gcc-4_8/winsup/w32api/include -B/usr/local/i686-pc-mingw32/bin/
-B/usr/local/i686-pc-mingw32/lib/ -isystem /usr/local/i686-pc-mingw32/include
-isystem
/usr/local/i686-pc-mingw32/sys-include    -g -O2 -O2
-I../../../gcc-4_8/libgcc/../winsup/w32api/include -g -O2 -DIN_GCC   -W -Wall
-Wno-narrowing -Wwrite-strings -Wcast-qual -Wstrict-prototypes
-Wmissing-prototypes -Wold
-style-definition  -isystem ./include   -g -DIN_LIBGCC2 -fbuilding-libgcc
-fno-stack-protector   -I. -I. -I../.././gcc -I../../../gcc-4_8/libgcc
-I../../../gcc-4_8/libgcc/. -I../../../gcc-4_8/libgcc/../gcc -I../../../gcc
-4_8/libgcc/../include -I../../../gcc-4_8/libgcc/config/libbid
-DENABLE_DECIMAL_BID_FORMAT -DHAVE_CC_TLS -DUSE_EMUTLS -o bid128_fma.o -MT
bid128_fma.o -MD -MP -MF bid128_fma.dep -c
../../../gcc-4_8/libgcc/config/libbid/b
id128_fma.c
[New Thread 10744.0xeb0]
../../../gcc-4_8/libgcc/config/libbid/bid128_fma.c:4460:1: internal compiler
error: Segmentation fault
 }
 ^
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.
[Inferior 1 (process 10744) exited with code 01]
(gdb) bt
No stack.
(gdb) 

Hope this helps.

[Bug target/56716] during gcc 4.8.0 build on Cygwin: bid128_fma.c:4460:1: internal compiler error: Segmentation fault

[aldot at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56716

Bernhard Reutner-Fischer <aldot at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|aldot at gcc dot gnu.org    |

--- Comment #9 from Bernhard Reutner-Fischer <aldot at gcc dot gnu.org> 2013-04-27 22:35:02 UTC ---
b internal_error
run
bt

[Bug target/56716] during gcc 4.8.0 build on Cygwin: bid128_fma.c:4460:1: internal compiler error: Segmentation fault

[gccbugzilla@tru-traffic.com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56716

--- Comment #10 from Greg <gccbugzilla@tru-traffic.com> 2013-04-27 23:28:21 UTC ---
(In reply to comment #9)
> b internal_error
> run
> bt

Alas, still no results.

gbullock@gbullock-W7 ~
$ cd /home/gbullock/gcc48o/i686-pc-mingw32/libgcc

gbullock@gbullock-W7 ~/gcc48o/i686-pc-mingw32/libgcc
$ export PATH=/home/gbullock/gcc48o/./gcc/:$PATH

gbullock@gbullock-W7 ~/gcc48o/i686-pc-mingw32/libgcc
$ gdb /home/gbullock/gcc48o/./gcc/xgcc
GNU gdb (GDB) 7.5
Copyright (C) 2012 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "i686-pc-mingw32".
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>...
Reading symbols from
C:\MinGW\msys\1.0\home\gbullock\gcc48o\gcc\xgcc.exe...done.
<fig/libbid -DENABLE_DECIMAL_BID_FORMAT -DHAVE_CC_TLS -DUSE_EMUTLS -o
bid128_fma.o -MT bid128_fma.o -MD -MP -MF bid128_fma.dep -c
../../../gcc-4_8/libgcc/config/libbid/bid128_fma.c
(gdb) b internal_error
Breakpoint 1 at 0x419592
(gdb) run
Starting program: C:\MinGW\msys\1.0\home\gbullock\gcc48o\gcc\xgcc.exe
-B/home/gbullock/gcc48o/./gcc/
-L/home/gbullock/gcc48o/i686-pc-mingw32/winsup/mingw
-L/home/gbullock/gcc48o/i686-pc-mingw32/winsup/w32api/lib -isystem
 /home/gbullock/gcc-4_8/winsup/mingw/include -isystem
/home/gbullock/gcc-4_8/winsup/w32api/include -B/usr/local/i686-pc-mingw32/bin/
-B/usr/local/i686-pc-mingw32/lib/ -isystem /usr/local/i686-pc-mingw32/include
-isystem
/usr/local/i686-pc-mingw32/sys-include    -g -O2 -O2
-I../../../gcc-4_8/libgcc/../winsup/w32api/include -g -O2 -DIN_GCC   -W -Wall
-Wno-narrowing -Wwrite-strings -Wcast-qual -Wstrict-prototypes
-Wmissing-prototypes -Wold
-style-definition  -isystem ./include   -g -DIN_LIBGCC2 -fbuilding-libgcc
-fno-stack-protector   -I. -I. -I../.././gcc -I../../../gcc-4_8/libgcc
-I../../../gcc-4_8/libgcc/. -I../../../gcc-4_8/libgcc/../gcc -I../../../gcc
-4_8/libgcc/../include -I../../../gcc-4_8/libgcc/config/libbid
-DENABLE_DECIMAL_BID_FORMAT -DHAVE_CC_TLS -DUSE_EMUTLS -o bid128_fma.o -MT
bid128_fma.o -MD -MP -MF bid128_fma.dep -c
../../../gcc-4_8/libgcc/config/libbid/b
id128_fma.c
[New Thread 4328.0x1c14]
../../../gcc-4_8/libgcc/config/libbid/bid128_fma.c:4460:1: internal compiler
error: Segmentation fault
 }
 ^
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.
[Inferior 1 (process 4328) exited with code 01]
(gdb) bt
No stack.
(gdb)

[Bug target/56716] during gcc 4.8.0 build on Cygwin: bid128_fma.c:4460:1: internal compiler error: Segmentation fault

[pmatos at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56716

--- Comment #11 from pmatos at gcc dot gnu.org ---
Author: pmatos
Date: Fri Sep 27 16:44:39 2013
New Revision: 202979

URL: http://gcc.gnu.org/viewcvs?rev=202979&root=gcc&view=rev
Log:
        Backport from mainline.

         PR middle-end/58463
         2013-03-27  Richard Biener  <rguenther@suse.de>

         PR tree-optimization/56716
         * tree-ssa-structalias.c (perform_var_substitution): Adjust
         dumping for ref nodes.

Modified:
    branches/gcc-4_8-branch/gcc/ChangeLog
    branches/gcc-4_8-branch/gcc/tree-ssa-structalias.c

[Bug target/56716] during gcc 4.8.0 build on Cygwin: bid128_fma.c:4460:1: internal compiler error: Segmentation fault

[ktietz at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56716

Kai Tietz <ktietz at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|WAITING                     |RESOLVED
                 CC|                            |ktietz at gcc dot gnu.org
         Resolution|---                         |FIXED

--- Comment #12 from Kai Tietz <ktietz at gcc dot gnu.org> ---
Reporters didn't commented on backported patches ... I assume that this issue
is fix for 4.8 and current trunk.  At least I couldn't reproduce it anymore.

If issue still exists please open new bug with testcase for reproducing.