[patch, fortran] Fix PR 82567

[Steve Kargl]

On Tue, Oct 17, 2017 at 06:14:16PM -0700, Jerry DeLisle wrote:
> On 10/17/2017 03:36 PM, Thomas Koenig wrote:
> > Hello world,
> > 
> > this patch fixes a regression with long compile times,
> > which came about due to our handling of array constructors
> > at compile time.  This, togeteher with a simplification in
> > front end optimization, led to long compile times and large
> > code.
> > 
> > Regression-tested. OK for trunk and the other affected branches?
> > 
> 
> Well I know 42 is the answer to the ultimate question of the universe so this
> must be OK.  I just don't know what the question is.
> 
> OK and thanks,
> 
> Jerry
> 
> +#define CONSTR_LEN_MAX 42

Actually, I was wondering about the choice myself.  With
most common hardware having fairly robust L1 and L2 cache
sizes, a double precision array constructor with 42 
elements only occupies 336 bytes.  Seems small.

-- 
Steve
20170425 https://www.youtube.com/watch?v=VWUpyCsUKR4
20161221 https://www.youtube.com/watch?v=IbCHE-hONow