[Patch, fortran] PR35743, PR34745, PR35759 and PR35756 - WHERE problems

[Paul Richard Thomas]

FX,

>> 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.
>
> This is OK to commit.

In the course of preparing to commit this, I got diverted and fixed
PRs35743 and 5:)

Since both fixes are harmless and verging on obvious, I propose to
commit as soon as bootstrapping the updated tree and regtesting are
done.

Bootstrapped and regtested on x86_ia64/FC8.

Cheers and thanks

Paul

2008-05-16  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.

	PR fortran/35743
	* trans-stmt.c (gfc_trans_where_2): Set the mask size to zero
	if it is calculated to be negative.

	PR fortran/35745
	* trans-stmt.c (gfc_trans_where_3, gfc_trans_where_assign): Set
	ss->where for scalar right hand sides.
	* trans-array.c (gfc_add_loop_ss_code): If ss->where is set do
	not evaluate scalars outside the loop.  Clean up whitespace.
	* trans.h : Add a bitfield 'where' to gfc_ss.

2008-05-16  Paul Thomas  <pault@gcc.gnu.org>

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

	PR fortran/35743
	PR fortran/35745
	* gfortran.dg/where_2.f90: New test.
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