http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60040
--- Comment #3 from Sebastian Huber <sebastian.hu...@embedded-brains.de> --- With avr-rtems4.11-gcc (GCC) 4.9.0 20140218 (experimental) I still get the error: avr-rtems4.11-gcc -fpreprocessed -w -mmcu=atmega128 -O2 -s test.i -o /dev/null test.i: In function 'rtems_fdisk_recycle_segment': test.i:107:1: error: unable to find a register to spill in class 'POINTER_REGS' } ^ test.i:107:1: error: this is the insn: (insn 30 29 31 2 (set (reg:HI 26 r26) (reg/v/f:HI 51 [ dpd ])) test.i:95 82 {*movhi} (nil)) test.i:107:1: internal compiler error: in spill_failure, at reload1.c:2106 0x825135 _fatal_insn(char const*, rtx_def const*, char const*, int, char const*) /home/sh/archive/gcc-git/gcc/rtl-error.c:109 0x81a888 spill_failure /home/sh/archive/gcc-git/gcc/reload1.c:2106 0x81a888 find_reload_regs /home/sh/archive/gcc-git/gcc/reload1.c:2032 0x8230a7 select_reload_regs /home/sh/archive/gcc-git/gcc/reload1.c:2052 0x8230a7 reload(rtx_def*, int) /home/sh/archive/gcc-git/gcc/reload1.c:973 0x72c04d do_reload /home/sh/archive/gcc-git/gcc/ira.c:5469 0x72c04d rest_of_handle_reload /home/sh/archive/gcc-git/gcc/ira.c:5598 0x72c04d execute /home/sh/archive/gcc-git/gcc/ira.c:5627 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. The output is different though.