[Bug lto/63968] New: [5 Regression] 175.vpr from cpu2000 fails to build with LTO

[hjl.tools at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63968

            Bug ID: 63968
           Summary: [5 Regression] 175.vpr from cpu2000 fails to build
                    with LTO
           Product: gcc
           Version: 5.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: lto
          Assignee: unassigned at gcc dot gnu.org
          Reporter: hjl.tools at gmail dot com

On Linux/x86-64, r217766 gave

gcc -c -o read_place.o   -DSPEC_CPU2000_LP64    -DSPEC_CPU2000     -O2
-ffast-math -fwhole-program -flto=jobserver -fuse-linker-plugin  read_place.c
gcc     -O2 -ffast-math -fwhole-program -flto=jobserver -fuse-linker-plugin
-DSPEC_CPU2000_LP64 main.o util.o read_netlist.o read_arch.o place.o route.o
draw.o graphics.o stats.o segment_stats.o rr_graph.o rr_graph2.o
rr_graph_sbox.o rr_graph_util.o rr_graph_timing_params.o rr_graph_area.o
check_rr_graph.o check_route.o hash.o read_place.o   -lm  -o vpr
stats.c: In function 'routing_stats':
stats.c:128:1: internal compiler error: in decrease_key, at
fibonacci_heap.h:189
 }
 ^
0x59f5dc fibonacci_heap<long,
basic_block_def>::decrease_key(fibonacci_node<long, basic_block_def>*, long)
    ../../src-trunk/gcc/fibonacci_heap.h:189
0xf5463c fibonacci_heap<long,
basic_block_def>::decrease_key(fibonacci_node<long, basic_block_def>*, long)
    ../../src-trunk/gcc/bb-reorder.c:2248
0xf5463c find_traces_1_round
    ../../src-trunk/gcc/bb-reorder.c:648
0xf5463c find_traces
    ../../src-trunk/gcc/bb-reorder.c:326
0xf5463c reorder_basic_blocks
    ../../src-trunk/gcc/bb-reorder.c:2276
0xf5463c execute
    ../../src-trunk/gcc/bb-reorder.c:2371
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]: *** [/tmp/ccARtdMs.ltrans8.ltrans.o] Error 1
lto-wrapper: fatal error: make returned 2 exit status
compilation terminated.
/usr/local/bin/ld: lto-wrapper failed
collect2: error: ld returned 1 exit status
specmake[3]: *** [vpr] Error 1