[Bug lto/68799] New: lto ICE on powerpc64le-linux-gnu builing python 2.7.x

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68799

            Bug ID: 68799
           Summary: lto ICE on powerpc64le-linux-gnu builing python 2.7.x
           Product: gcc
           Version: 5.3.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: lto
          Assignee: unassigned at gcc dot gnu.org
          Reporter: doko at gcc dot gnu.org
  Target Milestone: ---

seen with the current 5.3 branch, binutils from the 2.26 branch,
powerpc64le-linux-gnu only, big endian powerpc targets seem to succeed.

powerpc64le-linux-gnu-gcc -pthread -Wl,-z,relro  -fno-strict-aliasing -DNDEBUG
-g -fwrapv -O3 -Wall -Wstrict-prototype
s -D_FORTIFY_SOURCE=2 -g -fstack-protector-strong -Wformat
-Werror=format-security  -fprofile-use -fprofile-correction
 -g -flto -fuse-linker-plugin -ffat-lto-objects -Xlinker -export-dynamic
-Wl,-O1 -Wl,-Bsymbolic-functions -o python \
                Modules/python.o \
                -Wl,--whole-archive libpython2.7.a -Wl,--no-whole-archive
-lpthread -ldl  -lutil -L/usr/lib -lz       
    -lm  
../Python/peephole.c: In function 'PyCode_Optimize':
../Python/peephole.c:299:1: internal compiler error: Segmentation fault
 PyCode_Optimize(PyObject *code, PyObject* consts, PyObject *names,
 ^
0x1026a64b crash_signal
        ../../src/gcc/toplev.c:383
0x10e1f1f8 phi_add_costs
        ../../src/gcc/gimple-ssa-strength-reduction.c:2397
0x10e1de17 replace_uncond_cands_and_profitable_phis
        ../../src/gcc/gimple-ssa-strength-reduction.c:2440
0x10e1dd3b replace_uncond_cands_and_profitable_phis
        ../../src/gcc/gimple-ssa-strength-reduction.c:2464
0x10e1dd3b replace_uncond_cands_and_profitable_phis
        ../../src/gcc/gimple-ssa-strength-reduction.c:2464
0x10e1dd3b replace_uncond_cands_and_profitable_phis
        ../../src/gcc/gimple-ssa-strength-reduction.c:2464
0x10e1dd3b replace_uncond_cands_and_profitable_phis
        ../../src/gcc/gimple-ssa-strength-reduction.c:2464
0x10e1dd3b replace_uncond_cands_and_profitable_phis
        ../../src/gcc/gimple-ssa-strength-reduction.c:2464
0x10e1dd3b replace_uncond_cands_and_profitable_phis
        ../../src/gcc/gimple-ssa-strength-reduction.c:2464
0x10e1dd3b replace_uncond_cands_and_profitable_phis
        ../../src/gcc/gimple-ssa-strength-reduction.c:2464
0x10e1dd3b replace_uncond_cands_and_profitable_phis
        ../../src/gcc/gimple-ssa-strength-reduction.c:2464
0x10e1dd3b replace_uncond_cands_and_profitable_phis
        ../../src/gcc/gimple-ssa-strength-reduction.c:2464
0x10bb46cf analyze_candidates_and_replace
        ../../src/gcc/gimple-ssa-strength-reduction.c:3570
0x10bb46cf execute
        ../../src/gcc/gimple-ssa-strength-reduction.c:3681
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <file:///usr/share/doc/gcc-5/README.Bugs> for instructions.
lto-wrapper: fatal error: powerpc64le-linux-gnu-gcc returned 1 exit status
compilation terminated.
/usr/bin/ld: error: lto-wrapper failed
collect2: error: ld returned 1 exit status
Makefile:496: recipe for target 'python' failed

object files at https://people.debian.org/~doko/tmp/lto-tst.tar.xz