[Bug tree-optimization/44562] New: ICE: in get_alias_set, at alias.c:716 with -flto -fstrict-aliasing -fgraphite-identity

[Bug tree-optimization/44562] New: ICE: in get_alias_set, at alias.c:716 with -flto -fstrict-aliasing -fgraphite-identity

[zsojka at seznam dot cz]

The ICE looks similiar to PR43221, but it may be different issue - this one
needs only one file to crash.

Command line:
$ gcc -O1 -flto -fstrict-aliasing -fgraphite-identity testcase.c

Compiler output:
$ gcc -O1 -flto -fstrict-aliasing -fgraphite-identity testcase.c -m32
testcase.c: In function 'foo':
testcase.c:2:6: internal compiler error: in get_alias_set, at alias.c:716
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.


-- 
           Summary: ICE: in get_alias_set, at alias.c:716 with -flto -
                    fstrict-aliasing -fgraphite-identity
           Product: gcc
           Version: 4.6.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: tree-optimization
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: zsojka at seznam dot cz
GCC target triplet: i686-pc-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44562

[Bug tree-optimization/44562] ICE: in get_alias_set, at alias.c:716 with -flto -fstrict-aliasing -fgraphite-identity

[zsojka at seznam dot cz]

------- Comment #1 from zsojka at seznam dot cz  2010-06-16 21:04 -------
Created an attachment (id=20930)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=20930&action=view)
reduced testcase

To make it crash at x86_64-linux, the typedef has to be changed to:
typedef long long ll;

Command line (i686):
$ gcc -O1 -flto -fstrict-aliasing -fgraphite-identity pr44562.c


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44562

[Bug tree-optimization/44562] ICE: in get_alias_set, at alias.c:716 with -flto -fstrict-aliasing -fgraphite-identity

[rguenth at gcc dot gnu dot org]

------- Comment #2 from rguenth at gcc dot gnu dot org  2010-06-16 22:18 -------
Hm.  Confirmed.


-- 

rguenth at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|0                           |1
           Keywords|                            |lto
   Last reconfirmed|0000-00-00 00:00:00         |2010-06-16 22:18:04
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44562

[Bug tree-optimization/44562] [4.6 Regression] ICE: in get_alias_set, at alias.c:716 with -flto -fstrict-aliasing -fgraphite-identity

[zsojka at seznam dot cz]

------- Comment #3 from zsojka at seznam dot cz  2010-06-17 13:51 -------
It started crashing between r160527 and r160687


-- 

zsojka at seznam dot cz changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|ICE: in get_alias_set, at   |[4.6 Regression] ICE: in
                   |alias.c:716 with -flto -    |get_alias_set, at
                   |fstrict-aliasing -fgraphite-|alias.c:716 with -flto -
                   |identity                    |fstrict-aliasing -fgraphite-
                   |                            |identity


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44562

[Bug tree-optimization/44562] [4.6 Regression] ICE: in get_alias_set, at alias.c:716 with -flto -fstrict-aliasing -fgraphite-identity

[rguenth at gcc dot gnu dot org]

-- 

rguenth at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|---                         |4.6.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44562

[Bug tree-optimization/44562] [4.6 Regression] ICE: in get_alias_set, at alias.c:716 with -flto -fstrict-aliasing -fgraphite-identity

[jamborm at gcc dot gnu dot org]

------- Comment #4 from jamborm at gcc dot gnu dot org  2010-06-30 15:54 -------
Created an attachment (id=21044)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=21044&action=view)
Another testcase.

I believe I ran into this bug when trying WHOPR bootstrap at -O3 (on
x86_64-linux).  I narrowed it down to this piece of preprocessed
source.  To reproduce, compile with:

gcc -O3 -g -fuse-linker-plugin -fwhopr -c step2.i

The bug does not occur at -O2.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44562

[Bug tree-optimization/44562] [4.6 Regression] ICE: in get_alias_set, at alias.c:716 with -flto -fstrict-aliasing -fgraphite-identity

[jamborm at gcc dot gnu dot org]

------- Comment #5 from jamborm at gcc dot gnu dot org  2010-07-02 12:28 -------
On revision 161693, the backtrace to the spot where a CANONICAL_TYPE
is assigned to a type which already is a CANONICAL_TYPE of another one
is:

#0  0x00000000009529e4 in build_array_type (elt_type=0x7ffff7e947e0,
index_type=0x7ffff7f47a80)
    at /home/jamborm/gcc/small/gcc/tree.c:7168
#1  0x0000000000967d7e in make_vector_type (innertype=0x7ffff7e947e0, nunits=2,
mode=VOIDmode)
    at /home/jamborm/gcc/small/gcc/tree.c:8751
#2  0x0000000000967d34 in make_vector_type (innertype=0x7ffff6eb1348, nunits=2,
mode=VOIDmode)
    at /home/jamborm/gcc/small/gcc/tree.c:8743
#3  0x0000000000912035 in get_vectype_for_scalar_type
(scalar_type=0x7ffff6eb1348)
    at /home/jamborm/gcc/small/gcc/tree-vect-stmts.c:4523
#4  0x0000000000c23de3 in vect_analyze_data_refs (loop_vinfo=<value optimized
out>, 
    bb_vinfo=0x12a23a0, min_vf=0x7fffffffde4c)
    at /home/jamborm/gcc/small/gcc/tree-vect-data-refs.c:2215
#5  0x0000000000936296 in vect_slp_analyze_bb (bb=0x7ffff6eaf3a8)
    at /home/jamborm/gcc/small/gcc/tree-vect-slp.c:1483
#6  0x0000000000936aeb in execute_vect_slp ()
    at /home/jamborm/gcc/small/gcc/tree-vectorizer.c:276
#7  0x000000000074156c in execute_one_pass (pass=0x11bdc60)
    at /home/jamborm/gcc/small/gcc/passes.c:1565


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44562

[Bug tree-optimization/44562] [4.6 Regression] ICE: in get_alias_set, at alias.c:716 with -flto -fstrict-aliasing -fgraphite-identity

[rguenth at gcc dot gnu dot org]

------- Comment #6 from rguenth at gcc dot gnu dot org  2010-07-23 12:02 -------
Mine.


-- 

rguenth at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|unassigned at gcc dot gnu   |rguenth at gcc dot gnu dot
                   |dot org                     |org
             Status|NEW                         |ASSIGNED
   Last reconfirmed|2010-06-16 22:18:04         |2010-07-23 12:02:58
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44562

[Bug tree-optimization/44562] [4.6 Regression] ICE: in get_alias_set, at alias.c:716 with -flto -fstrict-aliasing -fgraphite-identity

[rguenth at gcc dot gnu dot org]

------- Comment #7 from rguenth at gcc dot gnu dot org  2010-08-23 20:12 -------
*** Bug 45368 has been marked as a duplicate of this bug. ***


-- 

rguenth at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |howarth at nitro dot med dot
                   |                            |uc dot edu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44562

[Bug tree-optimization/44562] [4.6 Regression] ICE: in get_alias_set, at alias.c:716 with -flto -fstrict-aliasing -fgraphite-identity

[pinskia at gcc dot gnu dot org]

------- Comment #8 from pinskia at gcc dot gnu dot org  2010-08-24 02:02 -------
*** Bug 45392 has been marked as a duplicate of this bug. ***


-- 

pinskia at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |t66667 at gmail dot com


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44562

[Bug tree-optimization/44562] [4.6 Regression] ICE: in get_alias_set, at alias.c:716 with -flto -fstrict-aliasing -fgraphite-identity

[t66667 at gmail dot com]

------- Comment #9 from t66667 at gmail dot com  2010-08-25 00:37 -------
*** Bug 45392 has been marked as a duplicate of this bug. ***


-- 

t66667 at gmail dot com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |t66667 at gmail dot com


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44562

[Bug tree-optimization/44562] [4.6 Regression] ICE: in get_alias_set, at alias.c:716 with -flto -fstrict-aliasing -fgraphite-identity

[rguenth at gcc dot gnu dot org]

------- Comment #10 from rguenth at gcc dot gnu dot org  2010-08-25 12:36 -------
So the issue is that when we prime the streamer cache for lto-out we register
the common type nodes (lto_record_common_node) which changes TYPE_CANONICAL
in a way we don't like (it globs int and long int, or long int and long long
int
dependent on whether you are on 32bit or 64bit platforms).  This is done
to for example allow mixing of -f[un]signed-char units at link time.

I have a patch.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44562

[Bug tree-optimization/44562] [4.6 Regression] ICE: in get_alias_set, at alias.c:716 with -flto -fstrict-aliasing -fgraphite-identity

[rguenth at gcc dot gnu dot org]

------- Comment #11 from rguenth at gcc dot gnu dot org  2010-08-25 14:05 -------
Subject: Bug 44562

Author: rguenth
Date: Wed Aug 25 14:05:28 2010
New Revision: 163545

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=163545
Log:
2010-08-25  Richard Guenther  <rguenther@suse.de>

        PR lto/44562
        * lto-streamer.c (lto_record_common_node): Do not mess with
        TYPE_CANONICAL when not in lto.
        * gimple.c (gimple_register_type): Likewise.

        * gcc.dg/graphite/id-27.c: New testcase.
        * gcc.dg/lto/20100825-1_0.c: Likewise.

Added:
    trunk/gcc/testsuite/gcc.dg/graphite/id-27.c
    trunk/gcc/testsuite/gcc.dg/lto/20100825-1_0.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/gimple.c
    trunk/gcc/lto-streamer.c
    trunk/gcc/testsuite/ChangeLog


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44562

[Bug tree-optimization/44562] [4.6 Regression] ICE: in get_alias_set, at alias.c:716 with -flto -fstrict-aliasing -fgraphite-identity

[rguenth at gcc dot gnu dot org]

------- Comment #12 from rguenth at gcc dot gnu dot org  2010-08-25 14:06 -------
Fixed.


-- 

rguenth at gcc dot gnu dot org changed:

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


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44562