[PATCH 0/2] Require that constraints are used to reference global regs

[Michael Matz]

Hi,

On Tue, 24 Apr 2018, Alexander Monakov wrote:

> On Mon, 23 Apr 2018, Michael Matz wrote:
> > Sooo, hmm, I don't know ;-)  We could try doing a roll backwards and 
> > demand explicit dependencies from asms with unknown effects on the few 
> > unknown users, though the timing really makes me nervous.  But my gut 
> > feeling says to remain (or become again) very conservative with global reg 
> > vars (and document that for real then!).
> 
> What's the problem with the timing? The code change is proposed for stage 1,
> only the doc change is intended for gcc-8.1.

Sure but even for that we need to decide if we want to go that or the 
opposite way, and that's not easy when a deadline is lurking behind you.


Ciao,
Michael.