------- Additional Comments From pinskia at gcc dot gnu dot org 2005-05-19 21:34 ------- (In reply to comment #2) > Subject: Re: Optimization level -O2 breaks float (double) conversion > > Dear Pinski and Co., > As a former compiler developer myself I was just trying to help, and I'm > sorry to tell you that your answer was not to the point.
The code is undefined by the C standard so we could compile it to make your hardware unusable after you execute that code (yes I am joking but that is what the C standard allows us to do). read http:// gcc.gnu.org/bugs.html and the explication on that page about this commonly reported bug. You can either workaround it by using -fno-strict-aliasing or using an union. And yes the compiler does generate a warning with -Wstrict-aliasing (which is included with -Wall). -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21666
