[Bug regression/55167] New: [4.8 Regression]: g++.dg/other/vector-compare.C, ICE

["hp at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55167

             Bug #: 55167
           Summary: [4.8 Regression]: g++.dg/other/vector-compare.C, ICE
    Classification: Unclassified
           Product: gcc
           Version: 4.8.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code
          Severity: normal
          Priority: P3
         Component: regression
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: hp@gcc.gnu.org
                CC: glisse@gcc.gnu.org
              Host: x86_64-unknown-linux-gnu
            Target: cris-axis-elf


This test previously passed, now it fails.
A patch in the revision range (last_known_working:first_known_failing)
192985:192991
exposed or caused this regression.  Since then it fails as follows:

Running /tmp/hpautotest-gcc0/gcc/gcc/testsuite/g++.dg/dg.exp ...
FAIL: g++.dg/other/vector-compare.C (internal compiler error)
FAIL: g++.dg/other/vector-compare.C (test for excess errors)

In g++.log:

Executing on host:
/tmp/hpautotest-gcc0/cris-elf/gccobj/gcc/testsuite/g++/../../g++
-B/tmp/hpautotest-gcc0/cris-elf/gccobj/gcc/testsuite/g++/../../
/tmp/hpautotest-gcc0/gcc/gcc/testsuite/g++.dg/other/vector-compare.C 
-fno-diagnostics-show-caret  -nostdinc++
-I/tmp/hpautotest-gcc0/cris-elf/gccobj/cris-elf/libstdc++-v3/include/cris-elf
-I/tmp/hpautotest-gcc0/cris-elf/gccobj/cris-elf/libstdc++-v3/include
-I/tmp/hpautotest-gcc0/gcc/libstdc++-v3/libsupc++
-I/tmp/hpautotest-gcc0/gcc/libstdc++-v3/include/backward
-I/tmp/hpautotest-gcc0/gcc/libstdc++-v3/testsuite/util -fmessage-length=0 
-std=gnu++11 -Wall  -S   -isystem
/tmp/hpautotest-gcc0/cris-elf/gccobj/cris-elf/./newlib/targ-include -isystem
/tmp/hpautotest-gcc0/gcc/newlib/libc/include  -o vector-compare.s    (timeout =
300)
/tmp/hpautotest-gcc0/gcc/gcc/testsuite/g++.dg/other/vector-compare.C: In
function 'int main()':

/tmp/hpautotest-gcc0/gcc/gcc/testsuite/g++.dg/other/vector-compare.C:30:21:
internal compiler error: Segmentation fault

0x9fc565 crash_signal

    /tmp/hpautotest-gcc0/gcc/gcc/toplev.c:333

0x802f65 force_operand(rtx_def*, rtx_def*)

    /tmp/hpautotest-gcc0/gcc/gcc/expr.c:6975

0x743ac0 expand_gimple_stmt_1

    /tmp/hpautotest-gcc0/gcc/gcc/cfgexpand.c:2168

0x743ac0 expand_gimple_stmt

    /tmp/hpautotest-gcc0/gcc/gcc/cfgexpand.c:2204

0x744b39 expand_gimple_basic_block

    /tmp/hpautotest-gcc0/gcc/gcc/cfgexpand.c:3979

0x746276 gimple_expand_cfg

    /tmp/hpautotest-gcc0/gcc/gcc/cfgexpand.c:4498


According to <http://gcc.gnu.org/ml/gcc-patches/2012-10/msg02858.html>, this
also happens for i686-linux and revision r192986 is to blame.

Author of suspect patch CC:ed.