[gfortran,patch] Another (possibly last?) LBOUND and UBOUND fix

[Jerry DeLisle]

FX Coudert wrote:
> Hi all,
> 
> Attached patch fixes both the simplification and translation for 
> intrinsic UBOUND/LBOUND to get correct results in all cases I could 
> imagine. This clears completely PR 29489 & 29712. The logic behind both 
> patches is straightforward, and the only thing noteworthy is that 
> {L,U}BOUND simplification provided by this patch is a bit pessimistic: 
> there are a few more cases that we should be able to simplify here, but 
> for thoses cases the folding of code emitted will take sufficient to not 
> need runtime evaluation.
> 
> I'm in no position to regtest this patch, being on the road with a very 
> slow laptop. I bootstrapped it, and regtested only {L,U}BOUND-related 
> testcases. Moreover, the patch is confined to two routines, so I'm 
> confident it doesn't break other things. Nonetheless, I'd appreciate if 
> a reviewer could give it a spin.
> 
> OK for mainline, 4.2 and 4.1?
> 
Regression tests fine on i686-linux.

Jerry