[Bug middle-end/58257] New: [4.8/4.9 Regression] Bogus warning with OpenMP collapsed loops

[Bug middle-end/58257] New: [4.8/4.9 Regression] Bogus warning with OpenMP collapsed loops

[jakub at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58257

            Bug ID: 58257
           Summary: [4.8/4.9 Regression] Bogus warning with OpenMP
                    collapsed loops
           Product: gcc
           Version: 4.8.1
            Status: UNCONFIRMED
          Keywords: openmp
          Severity: normal
          Priority: P3
         Component: middle-end
          Assignee: jakub at gcc dot gnu.org
          Reporter: jakub at gcc dot gnu.org

/* { dg-do compile } */
/* { dg-options "-O2 -fopenmp -Wall" } */

int
foo (int n)
{
  int a[10][10];
  int x, y;
#pragma omp parallel for collapse(2)
  for (x = 0; x < n; x++)/* { dg-bogus "may be used uninitialized in this
function" } */
    for (y = 0; y < n; y++)
      a[x][y] = x + y * y;
  return a[0][0];
}

yields:
rh999674.c: In function ‘<built-in>’:
rh999674.c:10:3: warning: ‘.count.6’ may be used uninitialized in this function
[-Wmaybe-uninitialized]
rh999674.c:10:3: note: ‘.count.6’ was declared here
rh999674.c:10:3: warning: ‘.count.7’ may be used uninitialized in this function
[-Wmaybe-uninitialized]
rh999674.c:10:3: note: ‘.count.7’ was declared here
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From: "mpolacek at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/58257] [4.8/4.9 Regression] Bogus warning with OpenMP collapsed loops
Date: Wed, 28 Aug 2013 10:04:00 -0000
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http://gcc.gnu.org/bugzilla/show_bug.cgi?idX257

Marek Polacek <mpolacek at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2013-08-28
                 CC|                            |mpolacek at gcc dot gnu.org
      Known to work|                            |4.7.3
     Ever confirmed|0                           |1
      Known to fail|                            |4.8.2, 4.9.0

--- Comment #1 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Confirmed.

[Bug middle-end/58257] [4.8/4.9 Regression] Bogus warning with OpenMP collapsed loops

[jakub at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58257

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |ASSIGNED
   Target Milestone|---                         |4.8.2

[Bug middle-end/58257] [4.8/4.9 Regression] Bogus warning with OpenMP collapsed loops

[jakub at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58257

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |RESOLVED
         Resolution|---                         |FIXED

--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Wed Aug 28 10:08:59 2013
New Revision: 202049

URL: http://gcc.gnu.org/viewcvs?rev=202049&root=gcc&view=rev
Log:
    PR middle-end/58257
    * omp-low.c (copy_var_decl): Copy over TREE_NO_WARNING flag.

    * c-c++-common/gomp/pr58257.c: New test.

Added:
    trunk/gcc/testsuite/c-c++-common/gomp/pr58257.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/omp-low.c
    trunk/gcc/testsuite/ChangeLog

Author: jakub
Date: Wed Aug 28 10:10:43 2013
New Revision: 202050

URL: http://gcc.gnu.org/viewcvs?rev=202050&root=gcc&view=rev
Log:
    PR middle-end/58257
    * omp-low.c (copy_var_decl): Copy over TREE_NO_WARNING flag.

    * c-c++-common/gomp/pr58257.c: New test.

Added:
    branches/gcc-4_8-branch/gcc/testsuite/c-c++-common/gomp/pr58257.c
Modified:
    branches/gcc-4_8-branch/gcc/ChangeLog
    branches/gcc-4_8-branch/gcc/omp-low.c
    branches/gcc-4_8-branch/gcc/testsuite/ChangeLog