[Bug c/45869] New: type mismatch in shift expression produces ice with -O3 and -m32

[Bug c/45869] New: type mismatch in shift expression produces ice with -O3 and -m32

[gary at intrepid dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45869

           Summary: type mismatch in shift expression produces ice with
                    -O3 and -m32
           Product: gcc
           Version: 4.5.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: gary@intrepid.com


This bug has a failure mode similar to bug #42927, except the failure occurs
only when compiling the attached test case with both -O3 and -m32 on an x86_64
host.  Checks must also be enabled.

The following output is produced:

vec-shift-m32-O3-ice.c: In function 'foo':
vec-shift-m32-O3-ice.c:22:1: error: type mismatch in vector shift expression
vector char *
vector char *
unsigned int
vect_var_.26_65 = vect_var_.23_64 v>> 64;

vec-shift-m32-O3-ice.c:22:1: error: type mismatch in vector shift expression
vector char *
vector char *
unsigned int
vect_var_.26_67 = vect_var_.26_66 v>> 32;

vec-shift-m32-O3-ice.c:22:1: internal compiler error: verify_stmts failed


Although the bug was detected in the 4.5.1 release, it can be reproduced in the
gcc-4.6-20100925 snapshot (SVN revision revision 164623) as well.

[Bug c/45869] type mismatch in shift expression produces ice with -O3 and -m32

[gary at intrepid dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45869

--- Comment #2 from Gary Funck <gary at intrepid dot com> 2010-10-02 18:55:10 UTC ---
Running reghunt against the 4.5 branch indicates that the following update
causes the failure:

r161951 | rguenth | 2010-07-08 11:56:08 +0000 (Thu, 08 Jul 2010) | 46 lines

2010-07-08  Richard Guenther  <rguenther@suse.de>

        Backport from mainline
        2010-05-27  Richard Guenther  <rguenther@suse.de>

        PR tree-optimization/44284
        * tree-vect-stmts.c (vectorizable_assignment): Handle
        sign-changing conversions as simple copy.
[...]

[Bug c/45869] [4.5/4.6 Regression] type mismatch in shift expression produces ice with -O3 and -m32

[hjl.tools at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45869

H.J. Lu <hjl.tools at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |hjl.tools at gmail dot com
   Target Milestone|---                         |4.5.2
            Summary|type mismatch in shift      |[4.5/4.6 Regression] type
                   |expression produces ice     |mismatch in shift
                   |with -O3 and -m32           |expression produces ice
                   |                            |with -O3 and -m32

[Bug c/45869] [4.5/4.6 Regression] type mismatch in shift expression produces ice with -O3 and -m32

[hjl.tools at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45869

H.J. Lu <hjl.tools at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2010.10.02 23:19:59
                 CC|                            |rguenth at gcc dot gnu.org
     Ever Confirmed|0                           |1

[Bug c/45869] [4.5/4.6 Regression] type mismatch in shift expression produces ice with -O3 and -m32

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45869

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

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

--- Comment #3 from Richard Guenther <rguenth at gcc dot gnu.org> 2010-10-03 19:43:29 UTC ---
Mine.

[Bug c/45869] [4.5/4.6 Regression] type mismatch in shift expression produces ice with -O3 and -m32

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45869

--- Comment #4 from Richard Guenther <rguenth at gcc dot gnu.org> 2010-10-07 13:39:29 UTC ---
Author: rguenth
Date: Thu Oct  7 13:39:25 2010
New Revision: 165108

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=165108
Log:
2010-10-07  Richard Guenther  <rguenther@suse.de>

    PR middle-end/45869
    * tree-cfg.c (verify_gimple_assign_binary): Allow vector shifts
    of pointers.

    * gcc.dg/torture/pr45869.c: New testcase.

Added:
    branches/gcc-4_5-branch/gcc/testsuite/gcc.dg/torture/pr45869.c
Modified:
    branches/gcc-4_5-branch/gcc/ChangeLog
    branches/gcc-4_5-branch/gcc/testsuite/ChangeLog
    branches/gcc-4_5-branch/gcc/tree-cfg.c

[Bug c/45869] [4.5/4.6 Regression] type mismatch in shift expression produces ice with -O3 and -m32

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45869

--- Comment #5 from Richard Guenther <rguenth at gcc dot gnu.org> 2010-10-07 14:32:26 UTC ---
Author: rguenth
Date: Thu Oct  7 14:32:20 2010
New Revision: 165113

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=165113
Log:
2010-10-07  Richard Guenther  <rguenther@suse.de>

    PR middle-end/45869
    * tree-cfg.c (verify_gimple_assign_binary): Allow vector shifts
    of pointers.

    * gcc.dg/torture/pr45869.c: New testcase.

Added:
    trunk/gcc/testsuite/gcc.dg/torture/pr45869.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-cfg.c

[Bug c/45869] [4.5/4.6 Regression] type mismatch in shift expression produces ice with -O3 and -m32

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45869

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

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

--- Comment #6 from Richard Guenther <rguenth at gcc dot gnu.org> 2010-10-07 14:53:07 UTC ---
Fixed.