Max Vozeler <[EMAIL PROTECTED]>, [EMAIL PROTECTED] schrieb am 12.09.05 13:48:41: > On Mon, Sep 12, 2005 at 01:29:38PM +0200, Max Vozeler wrote: > > I've been able to find a reduced testcase that shows the problem. > > can find below the results using gcc-3.4 and gcc-4.0 with -O1/-O2 each. > > The problem only shows with gcc-4.0 and -O2 on hppa.
Thanks a lot, this is really helpful. Here is a smaller test case. It also fails on i386 with gcc-4.120050705 at -O2 -fschedule-insns, but not with -fno-schedule-insns, so the bug seems to be in instruction scheduling. void abort(void); unsigned long long f(unsigned long long x) { return ((x >> 8) | (x << 56)) ^ ((x >> 48) | (x << 16)) ^ (x >> 1); } int main() { volatile unsigned long long v = 0x1122334455667788ULL; if (f(v) != 0xb3c46ef7196e4c91ULL) abort(); return 0; } -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]