[Patch, fortran] PR29422 and PR29428 - allocatable component wrinkles

[Paul Thomas]

:ADDPATCH fortran:

Well, these are the first, I suppose, of quite a few!

PR29422 is associated with the fact that resolve_transfer was not 
checking functions for IO suitability; this applies to derived types 
with pointer components, as well as allocatable, Try the testcase with 
allocatable => pointer on gcc-4.2.  The fix is easy; allow functions to 
be tested as well as variables.

PR29428 concerns double calls to functions that result from a 
nullifcation of the rhs of an assignment of a derived type with 
allocatable components.  It turns out that the nullify is unnecessary, 
being a left-over from an early version of the allocatable component 
patch, so the patch is to remove it.  I discovered it whilst developing 
a fix for PR29371; changing pointer=>allocatable resulted in four lines 
of output, instead of three!

Both the testcases are those submitted by the reporters.

Dominique d'Humieres has pointed out to me that the arrays need to be 
normalised so that lbound is one, rather than for example, copying the 
array bounds of constructor elements.  This is a rather substantial 
change, since it will hit various testcases too.  I will not hurry to 
fix this because we have survived until the 9th of this month with 
incorrectly normalised bounds all over the place (PR29391).  However, I 
will try to get it sorted on the timescale of a week.  Dominique, would 
you be so kind as to submit a PR for this, please?

Regtested on AMD64/Cygwin_NT - OK for trunk?

Paul

2006-10-12 Paul Thomas <pault@gcc.gnu.org>

    PR fortran/29422
    * resolve.c (resolve_transfer): Test functions for suitability
    for IO, as well as variables.

    PR fortran/29428
    * trans-expr.c (gfc_trans_scalar_assign): Remove nullify of
    rhs expression.

2006-10-12 Paul Thomas <pault@gcc.gnu.org>

    PR fortran/29422
    * gfortran.dg/alloc_comp_constraint_4.f90: New test.

    PR fortran/29428
    * gfortran.dg/alloc_comp_assign_5.f90: New test.

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