[Bug libgcc/66854] New: libgcc2.c:1846:9: internal compiler error: Segmentation fault

[Bug libgcc/66854] New: libgcc2.c:1846:9: internal compiler error: Segmentation fault

[sebastian.huber@embedded-brains.de]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66854

            Bug ID: 66854
           Summary: libgcc2.c:1846:9: internal compiler error:
                    Segmentation fault
           Product: gcc
           Version: 6.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: libgcc
          Assignee: unassigned at gcc dot gnu.org
          Reporter: sebastian.huber@embedded-brains.de
  Target Milestone: ---

make[4]: Entering directory
`/scratch/git-build/b-gcc-git-powerpc-rtems4.11/powerpc-rtems4.11/m403/libgcc'
# If this is the top-level multilib, build all the other
# multilibs.
/scratch/git-build/b-gcc-git-powerpc-rtems4.11/./gcc/xgcc
-B/scratch/git-build/b-gcc-git-powerpc-rtems4.11/./gcc/ -nostdinc
-B/scratch/git-build/b-gcc-git-powerpc-rtems4.11/powerpc-rtems4.11/newlib/
-isystem
/scratch/git-build/b-gcc-git-powerpc-rtems4.11/powerpc-rtems4.11/newlib/targ-include
-isystem /home/EB/sebastian_h/archive/gcc-git/newlib/libc/include
-B/opt/rtems-4.11/powerpc-rtems4.11/bin/
-B/opt/rtems-4.11/powerpc-rtems4.11/lib/ -isystem
/opt/rtems-4.11/powerpc-rtems4.11/include -isystem
/opt/rtems-4.11/powerpc-rtems4.11/sys-include    -g -O2 -mcpu=403 -O2
-I/home/EB/sebastian_h/archive/gcc-git/libgcc/../newlib/libc/sys/rtems/include
-g -O2 -DIN_GCC  -DCROSS_DIRECTORY_STRUCTURE  -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 -Dinhibit_libc  -I. -I. -I../../.././gcc
-I/home/EB/sebastian_h/archive/gcc-git/libgcc
-I/home/EB/sebastian_h/archive/gcc-git/libgcc/.
-I/home/EB/sebastian_h/archive/gcc-git/libgcc/../gcc
-I/home/EB/sebastian_h/archive/gcc-git/libgcc/../include  -DHAVE_CC_TLS  -o
_powisf2.o -MT _powisf2.o -MD -MP -MF _powisf2.dep -DL_powisf2 -c
/home/EB/sebastian_h/archive/gcc-git/libgcc/libgcc2.c -fvisibility=hidden
-DHIDE_EXPORTS
/home/EB/sebastian_h/archive/gcc-git/libgcc/libgcc2.c: In function '__powisf2':
/home/EB/sebastian_h/archive/gcc-git/libgcc/libgcc2.c:1846:9: internal compiler
error: Segmentation fault
       x = x * x;
         ^
0xa5ea6f crash_signal
        /home/EB/sebastian_h/archive/gcc-git/gcc/toplev.c:352
0xd63016 tree_class_check
        /home/EB/sebastian_h/archive/gcc-git/gcc/tree.h:3236
0xd63016 rs6000_pass_by_reference
        /home/EB/sebastian_h/archive/gcc-git/gcc/config/rs6000/rs6000.c:10836
0x56bb84 pass_by_reference(rs6000_args*, machine_mode, tree_node*, bool)
        /home/EB/sebastian_h/archive/gcc-git/gcc/calls.c:878
0x56d1cf emit_library_call_value_1
        /home/EB/sebastian_h/archive/gcc-git/gcc/calls.c:4033
0x573ff1 emit_library_call_value(rtx_def*, rtx_def*, libcall_type,
machine_mode, int, ...)
        /home/EB/sebastian_h/archive/gcc-git/gcc/calls.c:4631
0x984cd7 expand_binop(machine_mode, optab_tag, rtx_def*, rtx_def*, rtx_def*,
int, optab_methods)
        /home/EB/sebastian_h/archive/gcc-git/gcc/optabs.c:2133
0x670f1e expand_mult(machine_mode, rtx_def*, rtx_def*, rtx_def*, int)
        /home/EB/sebastian_h/archive/gcc-git/gcc/expmed.c:3266
0x6902b6 expand_expr_real_2(separate_ops*, rtx_def*, machine_mode,
expand_modifier)
        /home/EB/sebastian_h/archive/gcc-git/gcc/expr.c:8598
0x582482 expand_gimple_stmt_1
        /home/EB/sebastian_h/archive/gcc-git/gcc/cfgexpand.c:3340
0x582482 expand_gimple_stmt
        /home/EB/sebastian_h/archive/gcc-git/gcc/cfgexpand.c:3400
0x5847ad expand_gimple_basic_block
        /home/EB/sebastian_h/archive/gcc-git/gcc/cfgexpand.c:5412
0x589d0e execute
        /home/EB/sebastian_h/archive/gcc-git/gcc/cfgexpand.c:6023
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[4]: *** [_powisf2.o] Error 1

[Bug libgcc/66854] libgcc2.c:1846:9: internal compiler error: Segmentation fault

[sebastian.huber@embedded-brains.de]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66854

Sebastian Huber <sebastian.huber@embedded-brains.de> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |meissner at linux dot vnet.ibm.com

--- Comment #1 from Sebastian Huber <sebastian.huber@embedded-brains.de> ---
8b2f7251e4502efddba091ba4468e385ac435b52 is the first bad commit
commit 8b2f7251e4502efddba091ba4468e385ac435b52
Author: meissner <meissner@138bc75d-0d04-0410-961f-82ee72b054a4>
Date:   Thu Jul 9 18:55:01 2015 +0000

    2015-07-09  Michael Meissner  <meissner@linux.vnet.ibm.com>

        * config/rs6000/rs6000-protos.h (rs6000_secondary_reload_memory):
        Use machine mode, not enum machine_mode in the prototype.

        * config/rs6000/rs6000.h (FLOAT128_IEEE_P): New helper macros to
        classify 128-bit floating point support.
        (FLOAT128_IBM_P): Likewise.
        (FLOAT128_VECTOR_P): Likewise.
        (FLOAT128_2REG_P): Likewise.
        (SCALAR_FLOAT_MODE_NOT_VECTOR_P): Likewise.
        (SLOW_UNALIGNED_ACCESS): Add IEEE 128-bit floating point support.
        (HARD_REGNO_CALLER_SAVE_MODE): Likewise.
        (HARD_REGNO_CALL_PART_CLOBBERED): Likewise.

        * config/rs6000/rs6000.c (rs6000_hard_regno_nregs_internal): Drop
        tests against TFmode/TDmode, since those modes do not use VSX
        addresses.
        (rs6000_hard_regno_mode_ok): Add IEEE 128-bit floating point
        support.
        (rs6000_init_hard_regno_mode_ok): Use new helper macros instead of
        tests against TFmode, etc.
        (invalid_e500_subreg): Add tests against IFmode/KFmode.
        (reg_offset_addressing_ok_p): Likewise.
        (rs6000_legitimate_offset_address_p): Likewise.
        (rs6000_legitimize_address): Likewise.
        (rs6000_legitimize_reload_address): Likewise.
        (rs6000_legitimate_address_p): Clean up tests against TFmode and
        TDmode to use the new helper macros, which will include IFmode and
        KFmode.
        (rs6000_emit_move): Likewise.
        (rs6000_darwin64_record_arg_recurse): Likewise.
        (print_operand): Likewise.
        (rs6000_member_type_forces_blk): Treat IEEE 128-bit floating point
        that uses a single vector register as a vector and not as a
        floating point register in terms of the calling sequence.
        (rs6000_discover_homogeneous_aggregate): Likewise.
        (rs6000_return_in_memory): Likewise.
        (init_cumulative_args): Likewise.
        (rs6000_function_arg_boundary): Likewise.
        (rs6000_function_arg_advance_1): Likewise.
        (rs6000_function_arg): Likewise.
        (rs6000_pass_by_reference): Likewise.
        (rs6000_gimplify_va_arg): Likewise.
        (rs6000_secondary_reload_memory): Use machine_mode not enum
        machine mode.
        (rs6000_split_multireg_move): Use new helper macros.
        (spe_func_has_64bit_regs_p): Likewise.
        (rs6000_output_function_epilogue): Add IFmode/KFmode support.
        (output_toc): Use new helper macros.
        (rs6000_register_move_cost): Likewise.
        (rs6000_function_value): Add IEEE 128-bit floating point calling
        sequence support.
        (rs6000_libcall_value): Likewise.
        (rs6000_scalar_mode_supported_p): Add support for IEEE 128-bit
        floating point support.
        (rs6000_vector_mode_supported_p): Likewise.



    git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@225631
138bc75d-0d04-0410-961f-82ee72b054a4

:040000 040000 20fc90df33f1389e7c30b7b9e2499cb9045f0eca
8dffd9d0aa758f63d522a76fc4edea6a610bc9fc M      gcc

[Bug libgcc/66854] libgcc2.c:1846:9: internal compiler error: Segmentation fault

[meissner at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66854

Michael Meissner <meissner at gcc dot gnu.org> changed:

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

--- Comment #2 from Michael Meissner <meissner at gcc dot gnu.org> ---
What options did you use to configure the compiler with?

Are the RTEMS include files and libraries available on the internet so that I
can try to build a cross compiler to debug the problem?

[Bug libgcc/66854] libgcc2.c:1846:9: internal compiler error: Segmentation fault

[meissner at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66854

--- Comment #3 from Michael Meissner <meissner at gcc dot gnu.org> ---
Created attachment 35978
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=35978&action=edit
Proposed patch to fix the problem

I believe this patch fixes the problem.  I was able to build libgcc with this
patch installed.  I could not complete a full RTEMS build (I suspect I am
missing some parts of the software).

[Bug libgcc/66854] libgcc2.c:1846:9: internal compiler error: Segmentation fault

[meissner at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66854

--- Comment #5 from Michael Meissner <meissner at gcc dot gnu.org> ---
Author: meissner
Date: Wed Jul 15 17:15:37 2015
New Revision: 225843

URL: https://gcc.gnu.org/viewcvs?rev=225843&root=gcc&view=rev
Log:
2015-07-14  Michael Meissner  <meissner@linux.vnet.ibm.com>

        PR target/66854
        * config/rs6000/rs6000.c (rs6000_pass_by_reference): Move test for
        null before IEEE 128-bit floating point support patch.


Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/config/rs6000/rs6000.c

[Bug libgcc/66854] libgcc2.c:1846:9: internal compiler error: Segmentation fault

[meissner at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66854

Michael Meissner <meissner at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|---                         |FIXED
           Assignee|unassigned at gcc dot gnu.org      |meissner at gcc dot gnu.org

--- Comment #6 from Michael Meissner <meissner at gcc dot gnu.org> ---
Fixed in subversion id 225843.