[Patch, fortran] PR35759 and PR35756 - WHERE with overlap with ELSEWHERE error

[Paul Richard Thomas]

Dominique,
>
> Thank you for being stubborn!
>
> On Mon, Mar 31, 2008 at 11:38 PM, Dominique Dhumieres

I retired to think again on this patch after you correctly pointed out
the problem.  I returned to this and PR35756 in the last few days.  I
produced a variant of gfc_where_3 that did the job... until I looked
at the code.  It was identical to that produced by gfc_trans_where_2.
At this point, I underwent a lightbulb moment - this is a problem with
getting the dependency checking right!

The attached bootstraps and regtests on x86_ia64/FC8 - OK for trunk and 4.3?

Paul

2008-05-15  Paul Thomas  <pault@gcc.gnu.org>

	PR fortran/35756
	PR fortran/35759
	* trans-stmt.c (gfc_trans_where): Tighten up the dependency
	check for calling gfc_trans_where_3.

2008-05-15  Paul Thomas  <pault@gcc.gnu.org>

	PR fortran/35756
	PR fortran/35759
	* gfortran.dg/where_1.f90: New test.
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