[Bug tree-optimization/48648] New: internal compiler error: in translate_clast, at graphite-clast-to-gimple.c:1123

[Bug tree-optimization/48648] New: internal compiler error: in translate_clast, at graphite-clast-to-gimple.c:1123

[bero at arklinux dot org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48648

           Summary: internal compiler error: in translate_clast, at
                    graphite-clast-to-gimple.c:1123
           Product: gcc
           Version: 4.6.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: tree-optimization
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: bero@arklinux.org
              Host: i586-pc-linux-gnu
            Target: i586-pc-linux-gnu
             Build: i586-pc-linux-gnu


Trying to build postgresql 9.0.4 with gcc 4.6.0 with graphite optimizations
enabled results in

i586-pc-linux-gnu-gcc -O -fgraphite-identity -I../../../src/include
-D_GNU_SOURCE -I/usr/include/libxml2   -c -o ip.o ip.c
ip.c: In function ‘pg_sockaddr_cidr_mask’:
ip.c:343:1: internal compiler error: in translate_clast, at
graphite-clast-to-gimple.c:1123
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.

[Bug tree-optimization/48648] internal compiler error: in translate_clast, at graphite-clast-to-gimple.c:1123

[bero at arklinux dot org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48648

--- Comment #1 from bero at arklinux dot org 2011-04-17 09:48:04 UTC ---
Created attachment 24015
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=24015
Full preprocessed source

[Bug tree-optimization/48648] internal compiler error: in translate_clast, at graphite-clast-to-gimple.c:1123

[bero at arklinux dot org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48648

bero at arklinux dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
  Attachment #24015|0                           |1
        is obsolete|                            |

--- Comment #2 from bero at arklinux dot org 2011-04-17 10:08:36 UTC ---
Created attachment 24016
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=24016
Somewhat reduced test case

[Bug tree-optimization/48648] internal compiler error: in translate_clast, at graphite-clast-to-gimple.c:1123

[bero at arklinux dot org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48648

bero at arklinux dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
  Attachment #24016|0                           |1
        is obsolete|                            |

--- Comment #3 from bero at arklinux dot org 2011-04-17 10:34:17 UTC ---
Created attachment 24017
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=24017
Reduced test case

[Bug tree-optimization/48648] internal compiler error: in translate_clast, at graphite-clast-to-gimple.c:1123

[bero at arklinux dot org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48648

--- Comment #4 from bero at arklinux dot org 2011-04-17 10:34:52 UTC ---
void *foo(const void *a);

void bug48648()
{
        unsigned char a[2];
        long b;
        int i;

        for(i = 0; i < 2; i++) {
                if (b <= 0)
                        a[i] = 0;
                else if (b >= 8)
                        a[i] = 0;
                else
                        a[i] = 0;
                b -= 8;
        }
        foo(&a);
}

[Bug tree-optimization/48648] internal compiler error: in translate_clast, at graphite-clast-to-gimple.c:1123

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48648

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |spop at gcc dot gnu.org

--- Comment #5 from Richard Guenther <rguenth at gcc dot gnu.org> 2011-04-18 10:23:10 UTC ---
Please also specify the ppl and cloog versions you are using.

[Bug tree-optimization/48648] internal compiler error: in translate_clast, at graphite-clast-to-gimple.c:1123

[bero at arklinux dot org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48648

--- Comment #6 from bero at arklinux dot org 2011-04-18 12:19:12 UTC ---
cloog 0.16.2 with isl 0.06 (I read somewhere ppl should be replaced with isl?)

[Bug tree-optimization/48648] internal compiler error: in translate_clast, at graphite-clast-to-gimple.c:1123

[sebpop at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48648

--- Comment #7 from sebpop at gmail dot com <sebpop at gmail dot com> 2011-04-18 16:51:23 UTC ---
> (I read somewhere ppl should be replaced with isl?)

Not true: GCC still depends on PPL.
The use of cloog-ppl is deprecated: GCC will not use it in the future.
Using cloog-isl or cloog-parma is fine.

[Bug tree-optimization/48648] internal compiler error: in translate_clast, at graphite-clast-to-gimple.c:1123

[bero at arklinux dot org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48648

--- Comment #8 from bero at arklinux dot org 2011-06-18 09:55:58 UTC ---
ppl 0.11.2

[Bug tree-optimization/48648] internal compiler error: in translate_clast, at graphite-clast-to-gimple.c:1123

[spop at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48648

Sebastian Pop <spop at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |ASSIGNED
   Last reconfirmed|                            |2011.07.22 23:07:37
         AssignedTo|unassigned at gcc dot       |spop at gcc dot gnu.org
                   |gnu.org                     |
     Ever Confirmed|0                           |1

--- Comment #9 from Sebastian Pop <spop at gcc dot gnu.org> 2011-07-22 23:07:37 UTC ---
Patch
http://gcc.gnu.org/ml/gcc-patches/2011-07/msg02020.html

[Bug tree-optimization/48648] internal compiler error: in translate_clast, at graphite-clast-to-gimple.c:1123

[spop at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48648

--- Comment #10 from Sebastian Pop <spop at gcc dot gnu.org> 2011-07-22 23:11:14 UTC ---
*** Bug 49040 has been marked as a duplicate of this bug. ***

[Bug tree-optimization/48648] internal compiler error: in translate_clast, at graphite-clast-to-gimple.c:1123

[spop at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48648

--- Comment #11 from Sebastian Pop <spop at gcc dot gnu.org> 2011-07-28 21:57:15 UTC ---
Author: spop
Date: Thu Jul 28 21:57:10 2011
New Revision: 176901

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=176901
Log:
Fix PR48648: Handle CLAST assignments.

The CLAST produced by CLooG-ISL contains an assignment and GCC chokes
on it.  The exact CLAST contains an assignment followed by an if:

scat_1 = max(0,ceild(T_4-7,8));
if (scat_1 <= min(1,floord(T_4-1,8))) {
  S7(scat_1);
}

This is equivalent to a loop that iterates only once, and so CLooG
generates an assignment followed by an if instead of a loop.  This is
an important optimization that was improved in ISL, that allows
if-conversion: imagine GCC having to figure out that a loop like the
following actually iterates only once, and can be converted to an if:

for (scat_1 = max(0,ceild(T_4-7,8)); scat_1 <= min(1,floord(T_4-1,8));
scat_1++)
  S7(scat_1);

This patch implements the translation of CLAST assignments.
Bootstrapped and tested on amd64-linux.

2011-07-28  Sebastian Pop  <sebastian.pop@amd.com>

    PR middle-end/48648
    * graphite-clast-to-gimple.c (clast_get_body_of_loop): Handle
    CLAST assignments.
    (translate_clast): Same.
    (translate_clast_assignment): New.

    * gcc.dg/graphite/id-pr48648.c: New.

Added:
    trunk/gcc/testsuite/gcc.dg/graphite/id-pr48648.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/graphite-clast-to-gimple.c
    trunk/gcc/testsuite/ChangeLog

[Bug tree-optimization/48648] internal compiler error: in translate_clast, at graphite-clast-to-gimple.c:1123

[spop at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48648

Sebastian Pop <spop at gcc dot gnu.org> changed:

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

--- Comment #12 from Sebastian Pop <spop at gcc dot gnu.org> 2011-07-28 21:59:50 UTC ---
Fixed.

[Bug tree-optimization/48648] internal compiler error: in translate_clast, at graphite-clast-to-gimple.c:1123

[kilo at stierand dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48648

kiloalphaindia <kilo at stierand dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |kilo at stierand dot com

--- Comment #13 from kiloalphaindia <kilo at stierand dot com> 2011-08-08 11:24:35 UTC ---
It seams like this is not yet merged into 4.6. branch.

gcc version 4.6.2 20110729 (prerelease) (GCC) 

still fails.