[Bug tree-optimization/46190] New: ICE in vect_enhance_data_refs_alignment when building fma3d

[Bug tree-optimization/46190] New: ICE in vect_enhance_data_refs_alignment when building fma3d

[pthaugen at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46190

           Summary: ICE in vect_enhance_data_refs_alignment when building
                    fma3d
           Product: gcc
           Version: 4.6.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: tree-optimization
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: pthaugen@gcc.gnu.org
                CC: rguenth@gcc.gnu.org
              Host: powerpc64-linux
            Target: powerpc64-linux
             Build: powerpc64-linux


Created attachment 22166
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=22166
testcase

Looks like the fix for PR45720 (rev165832) causes an ICE when trying to build
CPU2000 benchmark fma3d. Benchmark file is fma1.f90, reduced testcase is
attatched.

> gfortran -c -O2 -ftree-vectorize -mcpu=power7 err.f90
err.f90: In function `spot_weld_initialization':
err.f90:1:0: internal compiler error: in vect_enhance_data_refs_alignment, at
tree-vect-data-refs.c:1550

[Bug tree-optimization/46190] [4.6 Regression] ICE in vect_enhance_data_refs_alignment when building fma3d

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46190

Richard Guenther <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|---                         |4.6.0
            Summary|ICE in                      |[4.6 Regression] ICE in
                   |vect_enhance_data_refs_alig |vect_enhance_data_refs_alig
                   |nment when building fma3d   |nment when building fma3d

[Bug tree-optimization/46190] [4.6 Regression] ICE in vect_enhance_data_refs_alignment when building fma3d

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46190

Richard Guenther <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |ASSIGNED
   Last reconfirmed|                            |2010.10.29 12:53:45
         AssignedTo|unassigned at gcc dot       |rguenth at gcc dot gnu.org
                   |gnu.org                     |
     Ever Confirmed|0                           |1

--- Comment #1 from Richard Guenther <rguenth at gcc dot gnu.org> 2010-10-29 12:53:45 UTC ---
Mine.

[Bug tree-optimization/46190] [4.6 Regression] ICE in vect_enhance_data_refs_alignment when building fma3d

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46190

Richard Guenther <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |WAITING

--- Comment #2 from Richard Guenther <rguenth at gcc dot gnu.org> 2010-11-02 15:13:26 UTC ---
/obj-ppc64-g/gcc> ./f951 -quiet -O2 -ftree-vectorize -mcpu=power7 t.f90
t.f90:20.28:

      USE shared_common_data
                            1
Fatal Error: Can't open module file 'shared_common_data.mod' for reading at
(1): No such file or directory


Can you produce a complete testcase please?  I don't have SPEC CPU set up
on ppc so I'd like to investigate with a cross.  Thx.

[Bug tree-optimization/46190] [4.6 Regression] ICE in vect_enhance_data_refs_alignment when building fma3d

[pthaugen at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46190

Pat Haugen <pthaugen at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
  Attachment #22166|0                           |1
        is obsolete|                            |

--- Comment #3 from Pat Haugen <pthaugen at gcc dot gnu.org> 2010-11-02 19:35:53 UTC ---
Created attachment 22235
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=22235
testcase

[Bug tree-optimization/46190] [4.6 Regression] ICE in vect_enhance_data_refs_alignment when building fma3d

[pthaugen at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46190

Pat Haugen <pthaugen at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
  Attachment #22235|0                           |1
        is obsolete|                            |

--- Comment #4 from Pat Haugen <pthaugen at gcc dot gnu.org> 2010-11-02 20:28:04 UTC ---
Created attachment 22239
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=22239
testcase

A more fully reduced (self-contained) testcase.

[Bug tree-optimization/46190] [4.6 Regression] ICE in vect_enhance_data_refs_alignment when building fma3d

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46190

Richard Guenther <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|WAITING                     |ASSIGNED

--- Comment #5 from Richard Guenther <rguenth at gcc dot gnu.org> 2010-11-03 10:57:03 UTC ---
Confirmed.

[Bug tree-optimization/46190] [4.6 Regression] ICE in vect_enhance_data_refs_alignment when building fma3d

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46190

--- Comment #6 from Richard Guenther <rguenth at gcc dot gnu.org> 2010-11-03 13:30:52 UTC ---
Author: rguenth
Date: Wed Nov  3 13:30:48 2010
New Revision: 166244

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=166244
Log:
2010-11-03  Richard Guenther  <rguenther@suse.de>

    PR tree-optimization/46190
    * tree-vect-data-refs.c (vect_enhance_data_refs_alignment):
    Properly compute peel iterations.

    * gfortran.dg/pr46190.f90: New testcase.

Added:
    trunk/gcc/testsuite/gfortran.dg/pr46190.f90
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-vect-data-refs.c

[Bug tree-optimization/46190] [4.6 Regression] ICE in vect_enhance_data_refs_alignment when building fma3d

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46190

Richard Guenther <rguenth at gcc dot gnu.org> changed:

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

--- Comment #7 from Richard Guenther <rguenth at gcc dot gnu.org> 2010-11-03 13:32:26 UTC ---
Fixed.