Re: [PATCH] Fortran: fix passing of zero-sized array arguments to procedures [PR86277]

[Steve Kargl <sgk@troutmask.apl.washington.edu>]

On Mon, Jun 12, 2023 at 11:12:45PM +0200, Harald Anlauf via Fortran wrote:
> Dear all,
> 
> the attached - actually rather small - patch is the result of a
> rather intensive session with Mikael in an attempt to fix the
> situation that we did not create proper temporaries when passing
> zero-sized array arguments to procedures.  When the dummy argument
> was declared as OPTIONAL, in many cases it was mis-detected as
> non-present.  This also depended on the type of argument, and
> was different for different intrinsic types, notably character,
> and derived types, and should explain the rather large ratio of
> the size of the provided testcases to the actual fix...
> 
> (What the patch does not address: we still generate too much code
> for unneeded temporaries, often two temporaries instead of just
> one.  I'll open a separate PR to track this.)
> 
> Regtested on x86_64-pc-linux-gnu.  OK for mainline?
> 
> If this survives long enough on 14-trunk, would this be eligible
> for a backport to 13-branch in time for 13.2?
> 

OK to commit.

I've reviewed the bugzilla exchange between Mikael and you,
and agree with committing this and opening a new PR to 
track the unneeded temporaries issue.

-- 
Steve