Dan Kaminsky <danat_private> writes: >Yes, but here you *hope* the compiler has the same semantics for "volatile" >that you do. The "keys to the kingdom"(sufficient context to zap your >memset) are left in place; you just hope the compiler bothers to ignore it. >I'd rather *know*, at least at the same level of confidence I have that I >know anything else about the compiler. This is what makes it such a tough problem, and why it may need compiler-level assistance. While I was looking for the version of gcc which removes the memset() (it appears to be a 3.x-only thing, but I can't get to the machine with 3.x on it at the moment) I noticed that every version of gcc I tried produced different output for the test source code. You really can't rely on a kludge which just happens to work for one version of the compiler (and you have to be careful when reporting a "problem" which only affects one version of the compiler :-). Peter.
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