m5@bobkat.UUCP (Mike McNally ) (02/03/88)
Here's a good one I came across this morning. Here's an expression:
register unsigned long i;
i = ((unsigned long) 0xffffffff / 10);
Guess what the variable ``i'' is set to? Zero! The compiler just
generates a CLRL instruction. Obviously the constant folding code
does not include a special case for ``unsigned long''.
The bug is present in our in-house compiler, in GNU CC, and in the
Integrated Solutions 4.2 UNIX compiler. Green Hills generates
correct code.
--
Mike McNally, mercifully employed at Digital Lynx ---
Where Plano Road the Mighty Flood of Forest Lane doth meet,
And Garland fair, whose perfumed air flows soft about my feet...
uucp: {texsun,killer,infotel}!pollux!bobkat!m5 (214) 238-7474