Messages in this thread | | | Date | Mon, 11 Aug 2003 06:38:30 +0100 | From | Jamie Lokier <> | Subject | Re: [PATCH] 2.4.22pre10: {,un}likely_p() macros for pointers |
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Willy Tarreau wrote: > It may well be when you use it in boolean constructs. The following functions > return exactly the same result with different code : > > int test1(int u, int v, int x, int y) { > return (u > v) || (x > y); > } > > int test2(int u, int v, int x, int y) { > return !!(u > v) | !!(x > y); > }
Yes, it sounds familiar. Although my code was not as contrived :) it was from a real program. Also, try "x != 0" instead of "!!x" and see if you get different results.
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