http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56927
--- Comment #1 from Segher Boessenkool <segher at gcc dot gnu.org> 2013-04-11
19:25:05 UTC ---
Forgot to mention... I debugged this a little; it happens during
the build of the 32-bit libgcc, and gdb says
Program received signal SIGSEGV, Segmentation fault.
build_conflict_bit_table ()
at /home/segher/src/gcc-4.7.2/gcc/ira-conflicts.c:178
178 ira_allocno_t live_a = OBJECT_ALLOCNO (live_obj);
(gdb) bt
#0 build_conflict_bit_table ()
at /home/segher/src/gcc-4.7.2/gcc/ira-conflicts.c:178
#1 ira_build_conflicts ()
at /home/segher/src/gcc-4.7.2/gcc/ira-conflicts.c:856
#2 0x000000000067eccf in ira_build ()
at /home/segher/src/gcc-4.7.2/gcc/ira-build.c:3101
#3 0x0000000000679177 in ira (f=<optimized out>)
at /home/segher/src/gcc-4.7.2/gcc/ira.c:3626
#4 rest_of_handle_ira () at /home/segher/src/gcc-4.7.2/gcc/ira.c:3798
[...]
(gdb) p live_obj
$1 = (ira_object_t) 0x0
