Re: Kernel 2.2.17 with RedHat 7 Problem !

[Andrea Arcangeli]

On Mon, Oct 23, 2000 at 12:05:22PM -0400, Aaron Sethman wrote:
> [..] gcc is doing the right thing, just not what you expected.

This code:

        iv.it_interval.tv_sec = 0;
        iv.it_interval.tv_usec = 250000;

        iv.it_value = iv.it_interval;

got miscompiled as:

        iv.it_value = iv.it_interval; /* read random */

        iv.it_interval.tv_sec = 0;
        iv.it_interval.tv_usec = 250000;

That is an obvious compiler bug. None legal optimization can allow the compiler
to do such reordering (not even with strict aliasing enabled).

Andrea
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