[Bug target/29714] internal compiler error: in extract_insn, at recog.c:2084

phil dot sidler at attachmate dot com gcc-bugzilla@gcc.gnu.org
Mon Nov 6 20:18:00 GMT 2006

------- Comment #5 from phil dot sidler at attachmate dot com  2006-11-06 20:18 -------
Recreated with the following

#include <stdint.h>

        uint8_t area  = 1;
        uint8_t oldval;
        uint8_t res;

        oldval = area;
        res = __sync_val_compare_and_swap(&area, oldval, 128);

Note that constant values less that 128 in the 3rd parameter work OK.
Casting the 3rd parameter to be unsigned does not work.
Using a temporary variable instead of a constant does work, but only with
optimization turned off.



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