[Bug c/86617] [6/7/8/9 Regression] Volatile qualifier is ignored sometimes for unsigned char

[rguenther at suse dot de]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86617

--- Comment #6 from rguenther at suse dot de <rguenther at suse dot de> ---
On Mon, 23 Jul 2018, bernd.edlinger at hotmail dot de wrote:

> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86617
> 
> --- Comment #5 from Bernd Edlinger <bernd.edlinger at hotmail dot de> ---
> (In reply to Richard Biener from comment #3)
> > but I guess that doesn't work because the counting is missing.  OTOH
> > two same SAVE_EXPRs () are not operand_equal_p but SAVE_EXPRs have
> > TREE_SIDE_EFFECTS set but we can safely handle SAVE_EXPR + SAVE_EXPR.
> > 
> 
> shouldn't that be fixed in operand_equal_p ?

Probably.  Can you test your patch and post it?