[Bug tree-optimization/27779] New: ICE at tree-data-ref.c:2335 when using -ftree-vectorize

[Bug tree-optimization/27779] New: ICE at tree-data-ref.c:2335 when using -ftree-vectorize

[p dot vanhoof at oma dot be]

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The attached code ICE's with the mainline, but not gcc 4.1.1 or 4.0.3.

> gcc -O1 -ftree-vectorize -c a.c
a.c: In function ‘o’:
a.c:4: internal compiler error: tree check: accessed operand 2 of nop_expr with
1 operands in analyze_siv_subscript_cst_affine, at tree-data-ref.c:2335

> gcc -v
Using built-in specs.
Target: x86_64-unknown-linux-gnu
Configured with: ../gcc420/configure --prefix=/usr/local/gcc420
--enable-languages=c,c++,fortran
Thread model: posix
gcc version 4.2.0 20060525 (experimental)


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           Summary: ICE at tree-data-ref.c:2335 when using -ftree-vectorize
           Product: gcc
           Version: 4.2.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: tree-optimization
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: p dot vanhoof at oma dot be


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27779

[Bug tree-optimization/27779] ICE at tree-data-ref.c:2335 when using -ftree-vectorize

[p dot vanhoof at oma dot be]

------- Comment #1 from p dot vanhoof at oma dot be  2006-05-27 12:55 -------
Created an attachment (id=11518)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=11518&action=view)
code that triggers the ICE


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27779

[Bug tree-optimization/27779] ICE at tree-data-ref.c:2335 when using -ftree-vectorize

[rguenth at gcc dot gnu dot org]

------- Comment #2 from rguenth at gcc dot gnu dot org  2006-05-27 16:25 -------
Works for me with gcc (GCC) 4.2.0 20060524 (experimental).


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rguenth at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
 GCC target triplet|                            |x86_64-*-*-*
           Keywords|                            |ice-on-valid-code


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27779

[Bug tree-optimization/27779] ICE at tree-data-ref.c:2335 when using -ftree-vectorize

[p dot vanhoof at oma dot be]

------- Comment #3 from p dot vanhoof at oma dot be  2006-05-27 17:21 -------
This bug is specific to x86_64. The "long i, j" in the code is essential in
reproducing this problem (with "int i, j" there will be no ICE). Hence the
behavior is platform specific.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27779

[Bug tree-optimization/27779] ICE at tree-data-ref.c:2335 when using -ftree-vectorize

[pinskia at gcc dot gnu dot org]

------- Comment #4 from pinskia at gcc dot gnu dot org  2006-05-29 07:22 -------
It also worked with 20060507.


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pinskia at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|---                         |4.2.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27779

[Bug tree-optimization/27779] ICE at tree-data-ref.c:2335 when using -ftree-vectorize

[pinskia at gcc dot gnu dot org]

------- Comment #5 from pinskia at gcc dot gnu dot org  2006-05-29 07:32 -------
Confirmed on today's compiler.


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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 07:32:51
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27779

[Bug tree-optimization/27779] ICE at tree-data-ref.c:2335 when using -ftree-vectorize

[pinskia at gcc dot gnu dot org]

------- Comment #6 from pinskia at gcc dot gnu dot org  2006-05-29 07:34 -------
2332      chrec_a = chrec_convert (integer_type_node, chrec_a, NULL_TREE);
2333      chrec_b = chrec_convert (integer_type_node, chrec_b, NULL_TREE);
2334      difference = chrec_fold_minus 
2335        (integer_type_node, CHREC_LEFT (chrec_b), chrec_a);

Obviously caused by:
2006-05-24  Zdenek Dvorak <dvorakz@suse.cz>

        PR tree-optimization/27639
        PR tree-optimization/26719


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pinskia 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=27779

[Bug tree-optimization/27779] ICE at tree-data-ref.c:2335 when using -ftree-vectorize

[rakdver at gcc dot gnu dot org]

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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
   Last reconfirmed|2006-05-29 07:32:51         |2006-05-29 13:39:01
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27779

[Bug tree-optimization/27779] ICE at tree-data-ref.c:2335 when using -ftree-vectorize

[rakdver at gcc dot gnu dot org]

------- Comment #7 from rakdver at gcc dot gnu dot org  2006-05-30 12:33 -------
Patch: http://gcc.gnu.org/ml/gcc-patches/2006-05/msg01515.html


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rakdver at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                URL|                            |http://gcc.gnu.org/ml/gcc-
                   |                            |patches/2006-
                   |                            |05/msg01515.html
           Keywords|                            |patch


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27779

[Bug tree-optimization/27779] ICE at tree-data-ref.c:2335 when using -ftree-vectorize

[rakdver at gcc dot gnu dot org]

------- Comment #8 from rakdver at gcc dot gnu dot org  2006-05-30 13:21 -------
Subject: Bug 27779

Author: rakdver
Date: Tue May 30 13:21:06 2006
New Revision: 114233

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=114233
Log:
        PR tree-optimization/27779
        * tree-data-ref.c (analyze_siv_subscript_cst_affine): Use
        initial_condition instead of CHREC_LEFT.


Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/tree-data-ref.c


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27779

[Bug tree-optimization/27779] [4.2 Regression] ICE at tree-data-ref.c:2335 when using -ftree-vectorize

[pinskia at gcc dot gnu dot org]

------- Comment #9 from pinskia at gcc dot gnu dot org  2006-05-30 13:59 -------
Fixed.


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pinskia at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |RESOLVED
         Resolution|                            |FIXED
            Summary|ICE at tree-data-ref.c:2335 |[4.2 Regression] ICE at
                   |when using -ftree-vectorize |tree-data-ref.c:2335 when
                   |                            |using -ftree-vectorize


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27779