[Bug fortran/84697] [8 Regression] minloc/maxloc not simplified with zero size

[tkoenig at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84697

--- Comment #5 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
Author: tkoenig
Date: Tue Mar  6 23:50:01 2018
New Revision: 258305

URL: https://gcc.gnu.org/viewcvs?rev=258305&root=gcc&view=rev
Log:
2017-03-06  Thomas Koenig  <tkoe...@gcc.gnu.org>

        PR fortran/84697
        PR fortran/66128
        * expr.c (simplify_parameter_variable): If p is a size zero array
        and not an ARRAY_EXPR insert an empty array constructor and
        return.
        * gfortran.h: Add prototype for gfc_is_size_zero_array.
        * simplify.c (is_size_zero_array): Make non-static and rename into
        (gfc_is_size_zero_array):  Check for parameter arrays of zero
        size by comparing shape and absence of constructor.
        (gfc_simplify_all): Use gfc_is_size_zero_array instead of
        is_size_zero_array.
        (gfc_simplify_count): Likewise.
        (gfc_simplify_iall): Likewise.
        (gfc_simplify_iany): Likewise.
        (gfc_simplify_iparity): Likewise.
        (gfc_simplify_minval): Likewise.
        (gfc_simplify_maxval): Likewise.
        (gfc_simplify_product): Likewise.
        (gfc_simplify_sum): Likewise.

2017-03-06  Thomas Koenig  <tkoe...@gcc.gnu.org>

        PR fortran/84697
        PR fortran/66128
        * gfortran.dg/minmaxloc_zerosize_1.f90: New test.


Added:
    trunk/gcc/testsuite/gfortran.dg/minmaxloc_zerosize_1.f90
Modified:
    trunk/gcc/fortran/ChangeLog
    trunk/gcc/fortran/expr.c
    trunk/gcc/fortran/gfortran.h
    trunk/gcc/fortran/simplify.c
    trunk/gcc/testsuite/ChangeLog