Arranging for -Os to imply -mpreferred-stack-boundary=2 on x86

[Bernd Schmidt]

On Tue, 23 Oct 2001, Jan Hubicka wrote:

> > One of our customers complained about the additional code generated to
> > maintain the stack aligned to 16-byte boundaries, and suggested us to
> > default to the minimum alignment when optimizing for code size.  This
> 
> Problem of this sollution is combining -Os modules with -O2.  It makes sense
> to compile internal loop by -O2/-O3 and rest with -Os.  I am doing that in
> XaoS zoomer to avoid bloat from user interface and it works well.

Then use -Os -mpreferred-stack-boundary=3.

Bernd