Inconsistent floating point result when using G++ 3.3.6 with option -O0 or -O1 separately

[Ian Lance Taylor]

"Deng Shi" <Deng.Shi@synopsys.com> writes:

> I just find the such a sum of -f options for -O1 on GCC 3.3.6 online
> manual. 
> What are the others -f options indicating in -O1?  

-O1 turns on optimizations which are not controlled by any -f
options.

Ian