[PATCH v3] Re: avoid useless if-before-free tests

[Jim Meyering]

Janne Blomqvist wrote:
> On Tue, Mar 8, 2011 at 19:53, Jim Meyering <jim@meyering.net> wrote:
>> Relative to v2, I've added libgo/ to the list of exempt directories and added
>> this recently discussed gfc_free patch, at the request of Tobias Burnus.
>> Also, I corrected an error in fortran's ChangeLog and removed all
>> whitespace changes from all ChangeLog files.
>
> The libgfortran changes are Ok for 4.7.
>
> For the gfortran frontend (gcc/fortran/*) I'd prefer if you'd
>
> - Replace all calls to "gfc_free (x)" with "free (x)".
> - Remove the gfc_free() function and prototype.
> - Remove the free() macro which currently prevents calling free() directly.

Following up, I've refreshed the series but hit a minor snag
while converting new uses of gfc_free, removing new tests-before-free
and merging/reordering changes.

Applying this fix first makes my problem go away:

>From 77142dc7da9e1e11ef8b0c554df4ff5c1bbdda39 Mon Sep 17 00:00:00 2001
From: Jim Meyering <meyering@redhat.com>
Date: Thu, 24 Mar 2011 17:45:42 +0100
Subject: [PATCH] gfortran: remove unneeded test-before-gfc_free

* trans-openmp.c (gfc_trans_omp_reduction_list): Do not guard
use of gfc_free; it can handle a NULL argument.
---
 gcc/fortran/ChangeLog      |    5 +++++
 gcc/fortran/trans-openmp.c |    3 +--
 2 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/gcc/fortran/ChangeLog b/gcc/fortran/ChangeLog
index 4e0a792..c532986 100644
--- a/gcc/fortran/ChangeLog
+++ b/gcc/fortran/ChangeLog
@@ -1,3 +1,8 @@
+2011-03-24  Jim Meyering  <meyering@redhat.com>
+
+	* trans-openmp.c (gfc_trans_omp_reduction_list): Do not guard
+	use of gfc_free; it can handle a NULL argument.
+
 2010-03-21  Thomas Koenig  <tkoenig@gcc.gnu.org>

 	PR fortran/22572
diff --git a/gcc/fortran/trans-openmp.c b/gcc/fortran/trans-openmp.c
index 53eb999..77ed3bb 100644
--- a/gcc/fortran/trans-openmp.c
+++ b/gcc/fortran/trans-openmp.c
@@ -714,8 +714,7 @@ gfc_trans_omp_array_reduction (tree c, gfc_symbol *sym, locus where)
   gfc_free (symtree1);
   gfc_free (symtree2);
   gfc_free (symtree3);
-  if (symtree4)
-    gfc_free (symtree4);
+  gfc_free (symtree4);
   gfc_free_array_spec (outer_sym.as);
 }

--
1.7.4.1.686.g46300