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From: "cvs-commit at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/96018] [9/10/11 Regression] Optimization issue with
 external HDF5 library
Date: Thu, 23 Jul 2020 15:56:33 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D96018

--- Comment #17 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-10 branch has been updated by Thomas K=C3=A0=C2=A4=C2=A5=
=C3=A0=C2=A4nig
<tkoenig@gcc.gnu.org>:

https://gcc.gnu.org/g:3373a73172d0e39fe054ab2d4bbff746b36c0fe8

commit r10-8520-g3373a73172d0e39fe054ab2d4bbff746b36c0fe8
Author: Thomas Koenig <tkoenig@gcc.gnu.org>
Date:   Thu Jul 23 17:56:09 2020 +0200

    Fix handling of implicit_pure by checking if non-pure procedures are
called.

    Procedures are marked as implicit_pure if they fulfill the criteria of
    pure procedures.  In this case, a procedure was not marked as not being
    implicit_pure which called another procedure, which had not yet been
    marked as not being implicit_impure.

    Fixed by iterating over all procedures, setting callers of procedures
    which are non-pure and non-implicit_pure as non-implicit_pure and
    doing this until no more procedure has been changed.

    Backport from trunk r11-2215-g3055d879edb1bc2a3923f92a5e681c8f6774fbc3 .

    gcc/fortran/ChangeLog:

    2020-07-10  Thomas Koenig  <tkoenig@gcc.gnu.org>

            PR fortran/96018
            * frontend-passes.c (gfc_check_externals): Adjust formatting.
            (implicit_pure_call): New function.
            (implicit_pure_expr): New function.
            (gfc_fix_implicit_pure): New function.
            * gfortran.h (gfc_fix_implicit_pure): New prototype.
            * parse.c (translate_all_program_units): Call
gfc_fix_implicit_pure.=