[Bug c++/23793] Unhealthy optimization. Accessing double with reinterpret_cast.

["martsummsw at hotmail dot com" <gcc-bugzilla at gcc dot gnu dot org>]

------- Additional Comments From martsummsw at hotmail dot com  2005-09-10 04:58 -------
First of all - Thank you. 
And I promise never to report an error against such an old version.

Second I however think I am happy to haven reported it since nobody on
comp.lang.c++ knew ..... I found nothing on the internet or 
man math.h | grep -i sign // this might have changed since my old version

Third I know that the reinterpret_cast is more than bad behavior and it 
strictly needs not to work. However I am not casting an int into a char-array
where I should be able to hit eg an odd adresses (or?) and I guess that no
padding could be in my way(?)
So I could see no *reason* for it not to work. I know the union would do it 
(more) secure. I was just so stupid to think that it would not be as efficient.

Summa: I am happy that I have been told about signbit - 
and I am really sorry to have wasted your time... 

Regards 
Thorbjørn


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23793