[Bug bootstrap/54643] New: Build hangs compiling unwind-arm.c

[rmansfield at qnx dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54643

             Bug #: 54643
           Summary: Build hangs compiling unwind-arm.c
    Classification: Unclassified
           Product: gcc
           Version: 4.8.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: bootstrap
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: rmansfield@qnx.com
              Host: x86_64-unknown-linux-gnu
            Target: arm-unknown-linux-gnueabi
             Build: x86_64-unknown-linux-gnu


Created attachment 28230
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=28230
preprocessed src

Compiling unwind-arm.c seems to loop endlessly.

(gdb) bt
#0  calculate_reg_deaths (death=0x7fffffffd830, insn=<optimized out>) at
../../gcc/haifa-sched.c:1682
#1  0x0000000000c6c1a7 in model_classify_pressure (insn=<optimized out>) at
../../gcc/haifa-sched.c:3097
#2  0x0000000000c712fb in model_choose_insn () at ../../gcc/haifa-sched.c:3569
#3  model_start_schedule () at ../../gcc/haifa-sched.c:3655
#4  0x0000000000c77e71 in schedule_block (target_bb=0x7fffffffdeb0) at
../../gcc/haifa-sched.c:5914
#5  0x000000000084feda in schedule_region (rgn=0) at ../../gcc/sched-rgn.c:2985
#6  schedule_insns () at ../../gcc/sched-rgn.c:3306
#7  schedule_insns () at ../../gcc/sched-rgn.c:3285
#8  0x00000000008500d3 in rest_of_handle_sched () at ../../gcc/sched-rgn.c:3499
#9  0x00000000007f5708 in execute_one_pass (pass=0x12bb560) at
../../gcc/passes.c:2206
#10 0x00000000007f5a85 in execute_pass_list (pass=0x12bb560) at
../../gcc/passes.c:2261
#11 0x00000000007f5a97 in execute_pass_list (pass=0x12bab40) at
../../gcc/passes.c:2262
#12 0x00000000005f34ec in expand_function (node=0x7ffff66b29c0) at
../../gcc/cgraphunit.c:1609
#13 0x00000000005f5159 in expand_all_functions () at
../../gcc/cgraphunit.c:1714
#14 compile () at ../../gcc/cgraphunit.c:2012
#15 0x00000000005f5965 in finalize_compilation_unit () at
../../gcc/cgraphunit.c:2089
#16 0x00000000004e2853 in c_write_global_declarations () at
../../gcc/c/c-decl.c:10116
#17 0x00000000008919bd in compile_file () at ../../gcc/toplev.c:560
#18 0x00000000008935e2 in do_compile () at ../../gcc/toplev.c:1863
#19 toplev_main (argc=4, argv=0x7fffffffe168) at ../../gcc/toplev.c:1939
#20 0x00007ffff6c4676d in __libc_start_main () from
/lib/x86_64-linux-gnu/libc.so.6
#21 0x00000000004c9c51 in _start ()