[Bug rtl-optimization/78546] [6/7 Regression] wrong code at -O2 and above

[rguenther at suse dot de]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78546

--- Comment #15 from rguenther at suse dot de <rguenther at suse dot de> ---
On Mon, 28 Nov 2016, zsojka at seznam dot cz wrote:

> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78546
> 
> --- Comment #14 from Zdenek Sojka <zsojka at seznam dot cz> ---
> (In reply to Jakub Jelinek from comment #12)
> > Therefore the comment should be
> > /* CST1 - (CST2 - A) -> (CST1 - CST2) - A  */
> > rather than
> > /* CST - (CST - A) -> CST - A  */
> 
> How comes it is not "CST1 - (CST2 - A) -> (CST1 - CST2) + A"?

My mistake