[Bug middle-end/70359] [6/7/8 Regression] Code size increase for x86/ARM/others compared to gcc-5.3.0

[aldyh at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70359

--- Comment #41 from Aldy Hernandez <aldyh at gcc dot gnu.org> ---
(In reply to rguenther@suse.de from comment #40)

> Well, your patch only replaces increments it can modify possibly
> leaving uses unaltered.  That's IMHO not good.
> 
> Which is why I suggested to have it like your original patch for
> those uses you can modify but for other uses simply substitute
> the LHS of the compensation stmt.
> 
> If the compensation stmt ends up being not used it won't be
> expanded I think (you could of course insert/build it just on-demand).

Ah.  I had misunderstood.

I will do as you suggest and then take the patch upstream so we can finish the
rest of the discussion there.

Thanks so much for the feedback.