Jasen Betts <[EMAIL PROTECTED]> writes:
> Package: gcc-4.1
> Version: 4.1.1-21
> Severity: normal
>
>
> abuse-sdl-0.7.0 has a gun aiming problem due to a mis-optimisation.
> attached is a canned example.
>
> (compile with -01 and -02 and compare the differences)
I can confirm this on i386, but not amd64 or alpha. A shorter test
case is:
int abs(int j);
void abort(void);
int lisp_atan2(long dy, long dx) {
if (dx <= 0)
if (dy > 0)
return abs(dx) <= abs(dy);
}
int main()
{
volatile long dy = 63, dx = -77;
if (lisp_atan2(dy, dx))
abort();
return 0 ;
}
--
Falk
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