gcc compile for code size

[Andrew Haley]

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.