avr-gcc internal compiler error

[haigh]

There is a bug in avr-gcc (version 4.7.2) that is fixed in 4.8.2. It seems to be the same as bug 52488 (from 4.7.0; http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52488).

gcc command line:
avr-gcc -mmcu=attiny24 -O2 error.c

Code:
#include <avr/io.h>

int main()
{
        int i=0;
        char buf[128];
        while((buf[i] != 0) && (++i < sizeof(buf)))
                buf[i] = PINA;
}

Error:
error.c: In function ‘main’:
error.c:9:1: error: unrecognizable insn:
(insn/f 68 67 69 2 (set (reg:QI 28 r28)
        (plus:QI (reg:QI 28 r28)
            (const_int 128 [0x80]))) error.c:4 -1
     (expr_list:REG_CFA_ADJUST_CFA (set (reg/f:HI 28 r28)
            (plus:HI (reg/f:HI 28 r28)
                (const_int -128 [0xffffffffffffff80])))
        (nil)))
error.c:9:1: internal compiler error: in extract_insn, at recog.c:2123
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.