[Bug fortran/84495] Incorrect result for concatenation of Fortran allocatable string

[tkoenig at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84495

--- Comment #5 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
Author: tkoenig
Date: Thu Feb 22 18:52:21 2018
New Revision: 257912

URL: https://gcc.gnu.org/viewcvs?rev=257912&root=gcc&view=rev
Log:
2018-02-22  Thomas Koenig  <tkoe...@gcc.gnu.org>

        PR fortran/81116
        PR fortran/84495
        Backport from trunk
        * frontend-passes.c (realloc_string_callback): If expression is a
        concatenation, also check for dependency.
        (constant_string_length): Check for presence of symtree.

2018-02-22  Thomas Koenig  <tkoe...@gcc.gnu.org>

        PR fortran/81116
        PR fortran/84495
        * gfortran.dg/realloc_on_assignment_29.f90:  New test.


Added:
    branches/gcc-7-branch/gcc/testsuite/gfortran.dg/realloc_on_assign_29.f90
Modified:
    branches/gcc-7-branch/gcc/fortran/ChangeLog
    branches/gcc-7-branch/gcc/fortran/frontend-passes.c
    branches/gcc-7-branch/gcc/testsuite/ChangeLog