[Bug rtl-optimization/22509] [4.1 regression] elemental.f90 testsuite failure (-fweb)

[Bug rtl-optimization/22509] [4.1 regression] elemental.f90 testsuite failure (-fweb)

[pinskia at gcc dot gnu dot org]

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pinskia at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|---                         |4.1.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=22509

[Bug rtl-optimization/22509] [4.1 regression] elemental.f90 testsuite failure (-fweb)

[pinskia at gcc dot gnu dot org]

------- Comment #10 from pinskia at gcc dot gnu dot org  2005-10-11 14:06 -------
I am changing the target milestone back to 4.1 as this is most likely fortran
specific, just nobody has found a C/C++ testcase for this bug.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=22509

[Bug rtl-optimization/22509] [4.1 regression] elemental.f90 testsuite failure (-fweb)

[pinskia at gcc dot gnu dot org]

------- Comment #11 from pinskia at gcc dot gnu dot org  2005-10-11 14:07 -------
(In reply to comment #10)
> I am changing the target milestone back to 4.1 as this is most likely fortran
> specific, just nobody has found a C/C++ testcase for this bug.

I mean this is most likely ___NOT___ fortran specific.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=22509

[Bug rtl-optimization/22509] [4.1 regression] elemental.f90 testsuite failure (-fweb)

[rguenth at gcc dot gnu dot org]

------- Comment #12 from rguenth at gcc dot gnu dot org  2005-10-13 22:03 -------
Zdenek, can you look into this?  It seems this (latent) bug was exposed with
your patch to enable -fweb and -frename-registers with -funroll-loops.


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rguenth at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |rakdver at gcc dot gnu dot
                   |                            |org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=22509

[Bug rtl-optimization/22509] [4.1 regression] elemental.f90 testsuite failure (-fweb)

[pinskia at gcc dot gnu dot org]

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pinskia at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Severity|normal                      |critical
 GCC target triplet|i686-pc-*                   |i686-*-*


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=22509

[Bug rtl-optimization/22509] [4.1 regression] elemental.f90 testsuite failure (-fweb)

[mmitchel at gcc dot gnu dot org]

------- Comment #13 from mmitchel at gcc dot gnu dot org  2005-10-31 04:08 -------
I've set this to P5.  If it's not Fortran-specific, Cc: me -- after attaching
the C/C++ test-case.  Or, just fix the bug. :-)


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mmitchel at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Priority|P2                          |P5


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=22509

[Bug rtl-optimization/22509] [4.1 regression] elemental.f90 testsuite failure (-fweb)

[tkoenig at gcc dot gnu dot org]

------- Comment #14 from tkoenig at gcc dot gnu dot org  2005-10-31 07:52 -------
Can we disable -fweb for 4.1.0 for fortran?


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=22509

[Bug rtl-optimization/22509] [4.1 regression] elemental.f90 testsuite failure (-fweb)

[rakdver at gcc dot gnu dot org]

-- 

rakdver at gcc dot gnu dot org changed:

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


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=22509

[Bug rtl-optimization/22509] [4.1 regression] elemental.f90 testsuite failure (-fweb)

[rakdver at gcc dot gnu dot org]

------- Comment #15 from rakdver at gcc dot gnu dot org  2005-11-01 14:08 -------
C testcase (needs to be compiled with -O1 -funroll-loops and complete unrolling
on trees must be disabled)

int e_fn (int *p, int *q)
{
  return *p - *q;
}

int main (void)
{
  int a[8];
  int b[8];
  int A[8];
  unsigned i, j;
  int C = 1, tmp;
  int *p;

  for (i = 2; i < 6; i++)
    {
      a[2 * i - 4] = 2;
      a[2 * i - 3] = 2;
    }

  for (i = 2; i < 6; i++)
    {
      b[2 * i - 4] = 0;
      b[2 * i - 3] = 0;
    }
  b[1] = e_fn (&a[0], &C);
  b[3] = e_fn (&a[2], &C);
  b[5] = e_fn (&a[4], &C);
  b[7] = e_fn (&a[6], &C);


  for (i = 1, j = 6; i < 5; i++, j -= 2)
    {
      p = A;
      tmp = b[2*i-2] + 1;
      A[2*i - 2] = e_fn(&a[j], &tmp);

      tmp = b[2*i-1] + 1;
      A[2*i - 1] = e_fn(&a[j+1], &tmp);
    }

  for (i = 1; i < 5; i++)
    {
      a[2*i-2] = p[2*i -2];
      a[2*i-1] = p[2*i -1];  for (i = 0; i < 8; i++)
    }
  printf ("  %d",a[i]);
  printf ("\n");
  return 0;
}


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=22509

[Bug rtl-optimization/22509] [4.1 regression] elemental.f90 testsuite failure (-fweb)

[rakdver at gcc dot gnu dot org]

------- Comment #16 from rakdver at gcc dot gnu dot org  2005-11-01 14:15 -------
Smaller testcase:

int e_fn (int *p, int *q)
{
  return *p - *q;
}

int main (void)
{
  int a[8] = {2,2,2,2,2,2,2,2};
  int b[8] = {0,1,0,1,0,1,0,1};
  int A[8];
  unsigned i, j;
  int tmp;
  int *p = A;

  for (i = 1, j = 6; i < 5; i++, j -= 2)
    {
      tmp = b[2*i-2] + 1;
      A[2*i - 2] = e_fn(&a[j], &tmp);

      tmp = b[2*i-1] + 1;
      A[2*i - 1] = e_fn(&a[j+1], &tmp);
    }

  for (i = 1; i < 4; i++)
    a[2*i-1] = p[2*i -1];

  printf ("%d\n",p[7]);
  return 0;
}


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=22509

[Bug rtl-optimization/22509] [4.1 regression] elemental.f90 testsuite failure (-fweb)

[pinskia at gcc dot gnu dot org]

-- 

pinskia at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Priority|P5                          |P3


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=22509

[Bug rtl-optimization/22509] [4.1 regression] elemental.f90 testsuite failure (-fweb)

[mmitchel at gcc dot gnu dot org]

------- Comment #17 from mmitchel at gcc dot gnu dot org  2005-11-03 06:38 -------
Setting to P2.  I'm not quite convinced that this rises to the level of a
showstopper, due to the fact that non-default options seem to be required, but
yes, we should fix this if at all possible.


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mmitchel at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Priority|P3                          |P2


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=22509

[Bug rtl-optimization/22509] [4.1 regression] elemental.f90 testsuite failure (-fweb)

[rakdver at gcc dot gnu dot org]

------- Comment #18 from rakdver at gcc dot gnu dot org  2005-11-03 14:48 -------
The problem first appears in .greg dump (store to a[1] is somehow moved across
a function call that needs its original value)


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=22509

[Bug rtl-optimization/22509] [4.1 regression] elemental.f90 testsuite failure (-fweb)

[rakdver at gcc dot gnu dot org]

------- Comment #19 from rakdver at gcc dot gnu dot org  2005-11-03 15:09 -------
Bogus REG_EQUIV note that causes this behavior first appears in .lreg


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=22509

[Bug rtl-optimization/22509] [4.1 regression] elemental.f90 testsuite failure (-fweb)

[rakdver at gcc dot gnu dot org]

------- Comment #20 from rakdver at gcc dot gnu dot org  2005-11-04 10:04 -------
Patch:
http://gcc.gnu.org/ml/gcc-patches/2005-11/msg00246.html


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rakdver at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |patch


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=22509

[Bug rtl-optimization/22509] [4.1 regression] elemental.f90 testsuite failure (-fweb)

[bonzini at gcc dot gnu dot org]

------- Comment #21 from bonzini at gcc dot gnu dot org  2005-11-07 18:22 -------
Is this a 4.0 regression too?


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=22509

[Bug rtl-optimization/22509] [4.1 regression] elemental.f90 testsuite failure (-fweb)

[rakdver at atrey dot karlin dot mff dot cuni dot cz]

------- Comment #22 from rakdver at atrey dot karlin dot mff dot cuni dot cz  2005-11-11 13:33 -------
Subject: Re:  [4.1 regression] elemental.f90 testsuite failure (-fweb)

> Is this a 4.0 regression too?

yes, the C testcase reproduces for me in 4.0 in the same way,
except that -fweb must be added to the flags.  The same patch applies
and fixes the problem.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=22509

[Bug rtl-optimization/22509] [4.1 regression] elemental.f90 testsuite failure (-fweb)

[rakdver at gcc dot gnu dot org]

------- Comment #23 from rakdver at gcc dot gnu dot org  2005-11-11 13:38 -------
Subject: Bug 22509

Author: rakdver
Date: Fri Nov 11 13:38:07 2005
New Revision: 106783

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=106783
Log:
        PR rtl-optimization/22509
        * local-alloc.c (memref_used_between_p): Check whether a function call
        could not reference the memref.


Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/local-alloc.c


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=22509

[Bug rtl-optimization/22509] [4.1 regression] elemental.f90 testsuite failure (-fweb)

[pinskia at gcc dot gnu dot org]

------- Comment #24 from pinskia at gcc dot gnu dot org  2005-11-11 15:35 -------
The regression has been fixed so closing.


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pinskia at gcc dot gnu dot org changed:

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


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=22509

[Bug rtl-optimization/22509] [4.1 regression] elemental.f90 testsuite failure (-fweb)

[tkoenig at gcc dot gnu dot org]

------- Additional Comments From tkoenig at gcc dot gnu dot org  2005-08-22 05:57 -------
My understanding is that this is not Fortran-specific, but
that Fortran happens to have a test case that exposes this
bug.  Has anybody constructed a C test case?

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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=22509

[Bug rtl-optimization/22509] [4.1 regression] elemental.f90 testsuite failure (-fweb)

[mmitchel at gcc dot gnu dot org]

------- Additional Comments From mmitchel at gcc dot gnu dot org  2005-08-22 04:43 -------
Fortran is not release-critical; removing target milestone.

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           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|4.1.0                       |---


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=22509