gcc compile for code size

[Xin Tong]

so as to how the instructions are selected. compiling for code size
does not have an effect ?

Xin


On Sun, Nov 11, 2012 at 2:54 PM, Andrew Haley <aph@redhat.com> wrote:
> On 11/11/2012 07:47 PM, Xin Tong wrote:
>> when gcc is set to compile for minimal code size, what kind of
>> optimizations does gcc apply in comparison to compile for performance
>> ? or it is just gcc spends more time doing the compilation, selecting
>> instruction sequences that are optimal for code size.
>
> No.  GCC does all optimizations *except* those known to increase
> program size.  This usually works pretty well, but isn't perfect.
>
> Andrew.
>