Re: [PATCH] Fix 67064 - Register asm variable broken

[Jason Merrill <jason at redhat dot com>]

On 09/22/2015 11:49 AM, Jason Merrill wrote:
> On 09/16/2015 10:24 AM, Andres Tiraboschi wrote:
> > Hi, this patch fix the following bug:
> > https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67064 for gcc 5.2
> >
> > It passes all the gcc tests except for this:
> > FAIL: g++.dg/cpp1y/auto-fn15.C  -std=gnu++14 (test for excess errors)
>
> Yep.  The test is verifying that decltype(auto) functions handle
> parentheses properly, and the patch disables the code for that handling.
>
> > but this also happens without the patch.
>
> The test passes for me without this patch.

A simple fix would be to just disable the reference games when we're 
looking at a hard register variable.  That would break decltype(auto) 
for hard register variables, but since they are a GNU extension that 
isn't a big deal.

Jason