[Bug fortran/27786] New: Bad interaction between Cray pointer, assumed-size array and bounds checking

[Bug fortran/27786] New: Bad interaction between Cray pointer, assumed-size array and bounds checking

[fxcoudert at gcc dot gnu dot org]

This reduced testcase is originally from the testsuite
gfortran.dg/cray_pointers_2.f90. It generates an incorrect out-of-bounds error
message when run with bounds-checking enabled.

$ cat cray_pointers_2.f90 
  integer targ(2)
  integer pte
  pointer(ptr,pte(*))
  ptr = loc(targ)

  targ(2) = -1
  print *, pte(2)
  end
$ gfortran -fbounds-check -fcray-pointer cray_pointers_2.f90 && ./a.out
Fortran runtime error: Array reference out of bounds


-- 
           Summary: Bad interaction between Cray pointer, assumed-size array
                    and bounds checking
           Product: gcc
           Version: 4.2.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: fortran
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: fxcoudert at gcc dot gnu dot org
OtherBugsDependingO 27766
             nThis:


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27786

[Bug fortran/27786] Bad interaction between Cray pointer, assumed-size array and bounds checking

[pinskia at gcc dot gnu dot org]

------- Comment #1 from pinskia at gcc dot gnu dot org  2006-05-29 07:44 -------
Confirmed.


-- 

pinskia at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|0                           |1
   Last reconfirmed|0000-00-00 00:00:00         |2006-05-29 07:44:54
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27786

[Bug fortran/27786] Bad interaction between Cray pointer, assumed-size array and bounds checking

[patchapp at dberlin dot org]

------- Comment #2 from patchapp at dberlin dot org  2006-05-31 12:45 -------
Subject: Bug number PR 27786

A patch for this bug has been added to the patch tracker.
The mailing list url for the patch is
http://gcc.gnu.org/ml/gcc-patches/2006-05/msg01544.html


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27786

[Bug fortran/27786] Bad interaction between Cray pointer, assumed-size array and bounds checking

[langton at gcc dot gnu dot org]

-- 

langton at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|unassigned at gcc dot gnu   |langton at gcc dot gnu dot
                   |dot org                     |org
             Status|NEW                         |ASSIGNED


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27786

[Bug fortran/27786] Bad interaction between Cray pointer, assumed-size array and bounds checking

[langton at gcc dot gnu dot org]

------- Comment #3 from langton at gcc dot gnu dot org  2006-06-08 21:01 -------
Subject: Bug 27786

Author: langton
Date: Thu Jun  8 21:00:26 2006
New Revision: 114495

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=114495
Log:
        * cray_pointers_2.f90: Add -fbounds-check compile flag.

        PR fortran/27786
        * trans-array.c (gfc_conv_array_ref): Eliminate bounds checking
        for assumed-size Cray pointees.


Modified:
    trunk/gcc/fortran/ChangeLog
    trunk/gcc/fortran/trans-array.c
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/testsuite/gfortran.dg/cray_pointers_2.f90


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27786

[Bug fortran/27786] Bad interaction between Cray pointer, assumed-size array and bounds checking

[langton at gcc dot gnu dot org]

------- Comment #4 from langton at gcc dot gnu dot org  2006-06-08 21:03 -------
I've committed a patch that should fix this bug.


-- 

langton at gcc dot gnu dot org changed:

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


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27786

[Bug fortran/27786] [4.1 only] Bad interaction between Cray pointer, assumed-size array and bounds checking

[fxcoudert at gcc dot gnu dot org]

------- Comment #5 from fxcoudert at gcc dot gnu dot org  2006-06-09 06:43 -------
I'm reopening the PR because the bug is not fixed yet on the 4.1 branch. The
current policy is to allow a week before comitting your patch to 4.1 (after
bootstrap & regtesting), and then close the bugzilla PR.

(in case you need info on how to use svn to backport a patch, you can read
http://gcc.gnu.org/wiki/SvnMerge)


-- 

fxcoudert at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|RESOLVED                    |REOPENED
           Keywords|                            |patch
      Known to fail|                            |4.1.2
      Known to work|                            |4.2.0
         Resolution|FIXED                       |
            Summary|Bad interaction between Cray|[4.1 only] Bad interaction
                   |pointer, assumed-size array |between Cray pointer,
                   |and bounds checking         |assumed-size array and
                   |                            |bounds checking


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27786

[Bug fortran/27786] [4.1 only] Bad interaction between Cray pointer, assumed-size array and bounds checking

[langton at gcc dot gnu dot org]

------- Comment #6 from langton at gcc dot gnu dot org  2006-06-15 23:07 -------
Subject: Bug 27786

Author: langton
Date: Thu Jun 15 23:07:14 2006
New Revision: 114692

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=114692
Log:
        PR fortran/27786
        * cray_pointers_2.f90: Add -fbounds-check compile flag.

        PR fortran/27786
        * trans-array.c (gfc_conv_array_ref): Eliminate bounds checking
        for assumed-size Cray pointees.


Modified:
    branches/gcc-4_1-branch/gcc/fortran/ChangeLog
    branches/gcc-4_1-branch/gcc/fortran/trans-array.c
    branches/gcc-4_1-branch/gcc/testsuite/ChangeLog
    branches/gcc-4_1-branch/gcc/testsuite/gfortran.dg/cray_pointers_2.f90


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27786

[Bug fortran/27786] [4.1 only] Bad interaction between Cray pointer, assumed-size array and bounds checking

[langton at gcc dot gnu dot org]

------- Comment #7 from langton at gcc dot gnu dot org  2006-06-15 23:11 -------
I've backported the patch to 4.1, so this bug should be resolved.


-- 

langton at gcc dot gnu dot org changed:

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


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27786