------- Comment #10 from martin dot apel at simpack dot de 2008-03-11 07:58 ------- You are right, tan(PI/2) is undefined. I had this contained in some sort of unit test comparing the results of my own formula evaluation code and the result of the compiler. This gave the same result with gcc 4.2, but not with 4.3. So this is obviously not really a bug, just differing behaviour in a case, where the behaviour is undefined.
-- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35523
