I just tried a 4.9.1 build and got this error:
configure:4222: checking whether to use setjmp/longjmp exceptions
configure:: /greed/dj/gnu/gcc/m32c-elf/gcc-4_9-branch/./gcc/xgcc
-B/greed/dj/gnu/gcc/m32c-elf/gcc-4_9-branch/./gcc/
-B/greed/dj/m32c/install/m32c-elf/bin/ -B/greed/dj/m32c/install/m32c-elf/lib/
-isystem /greed/dj/m32c/install/m32c-elf/include -isystem
/greed/dj/m32c/install/m32c-elf/sys-include -mcpu=m32cm -c --save-temps
-fexceptions conftest.c >&5
conftest.c: In function 'foo':
conftest.c:19:1: error: insn does not satisfy its constraints:
}
^
(insn 52 38 23 (set (reg:SI 2 r1 [29])
(reg:SI 4 a0)) 99 {movsi_24}
(nil))
conftest.c:19:1: internal compiler error: in final_scan_insn, at final.c:2891
0x7a56a8 _fatal_insn(char const*, rtx_def const*, char const*, int, char const*)
/greed/dj/gnu/gcc/svn/gcc-4_9-branch/gcc/rtl-error.c:109
0x7a56cf _fatal_insn_not_found(rtx_def const*, char const*, int, char const*)
/greed/dj/gnu/gcc/svn/gcc-4_9-branch/gcc/rtl-error.c:120
0x6256c9 final_scan_insn(rtx_def*, _IO_FILE*, int, int, int*)
/greed/dj/gnu/gcc/svn/gcc-4_9-branch/gcc/final.c:2891
0x6258ef final(rtx_def*, _IO_FILE*, int)
/greed/dj/gnu/gcc/svn/gcc-4_9-branch/gcc/final.c:2023
0x626035 rest_of_handle_final
/greed/dj/gnu/gcc/svn/gcc-4_9-branch/gcc/final.c:4427
0x626035 execute
/greed/dj/gnu/gcc/svn/gcc-4_9-branch/gcc/final.c:4502
