[Bug middle-end/41453] use INTENT(out) for optimization

[tkoenig at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=41453

--- Comment #4 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
Author: tkoenig
Date: Sat Sep 22 18:44:01 2018
New Revision: 264506

URL: https://gcc.gnu.org/viewcvs?rev=264506&root=gcc&view=rev
Log:
2018-09-22  Thomas Koenig  <tkoe...@gcc.gnu.org>

        PR fortran/41453
        * trans.h (gfc_conv_expr_reference): Add optional argument
        add_clobber to prototype.
        (gfc_conv_procedure_call):  Set add_clobber argument to
        gfc_conv_procedure_reference to true for scalar, INTENT(OUT),
        non-pointer, non-allocatable, non-dummy variables whose type
        is neither BT_CHARACTER, BT_DERIVED or BT_CLASS, but only if
        the procedure is not elemental.
        * trans-expr.c (gfc_conv_procedure_reference): Add clobber
        statement before call if add_clobber is set.

2018-09-22  Thomas Koenig  <tkoe...@gcc.gnu.org>

        PR fortran/41453
        * gfortran.dg/intent_optimize_2.f90: New test.


Added:
    trunk/gcc/testsuite/gfortran.dg/intent_optimize_2.f90
Modified:
    trunk/gcc/fortran/ChangeLog
    trunk/gcc/fortran/trans-expr.c
    trunk/gcc/fortran/trans.h
    trunk/gcc/testsuite/ChangeLog