[Bug tree-optimization/41305] New: ICE with -O3 -floop-interchange

[Bug tree-optimization/41305] New: ICE with -O3 -floop-interchange

[jakub at gcc dot gnu dot org]

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The following testcase ICEs on x86_64-linux on branches/gcc-4_4-branch with -O3
-floop-interchange:
Unable to coalesce ssa_names 99 and 106 which are marked as MUST COALESCE.
xi$data_$size__99(ab) and  xi$data_$size__106(ab)
/tmp/rh520785.ii: In function ‘void foo(int)’:
/tmp/rh520785.ii:321: internal compiler error: SSA corruption
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.
Couldn't reproduce this on the trunk, but that doesn't mean the bug isn't
latent there.  Doesn't reproduce without -floop-interchange, so I assume it is
graphite which is at fault here.


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           Summary: ICE with -O3 -floop-interchange
           Product: gcc
           Version: 4.4.2
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code
          Severity: normal
          Priority: P3
         Component: tree-optimization
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: jakub at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41305

[Bug tree-optimization/41305] ICE with -O3 -floop-interchange

[jakub at gcc dot gnu dot org]

------- Comment #1 from jakub at gcc dot gnu dot org  2009-09-08 09:16 -------
Created an attachment (id=18539)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=18539&action=view)
rh520785.ii


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41305

[Bug tree-optimization/41305] ICE with -O3 -floop-interchange

[spop at gcc dot gnu dot org]

------- Comment #2 from spop at gcc dot gnu dot org  2009-10-15 16:38 -------
This is fixed in the graphite branch.


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spop at gcc dot gnu dot org changed:

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


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41305

[Bug tree-optimization/41305] ICE with -O3 -floop-interchange

[spop at gcc dot gnu dot org]

------- Comment #3 from spop at gcc dot gnu dot org  2009-12-23 18:11 -------
The testcase fails without graphite at -O0, probably a problem in the C++
front-end:
stopping the execution randomly, I get the following backtraces:

#0  0x0000000000660ccc in structural_comptypes (t1=0x7f097e143690,
t2=0x7f097df37e70, strict=0) at ../../gcc/cp/typeck.c:1170
#1  0x00000000006631a7 in comptypes (t1=0x7f097e143690, t2=0x7f097df37e70,
strict=0) at ../../gcc/cp/typeck.c:1298
#2  0x000000000054e11f in template_args_equal (ot=0x7f097e143690,
nt=0x7f097df37e70) at ../../gcc/cp/pt.c:5924
#3  0x000000000054e38b in comp_template_args (oldargs=0x7f097e147fc8,
newargs=0x7f097df40398) at ../../gcc/cp/pt.c:5947
#4  0x000000000066190c in structural_comptypes (t1=0x7f097e14a000,
t2=0x7f097df3f7e0, strict=0) at ../../gcc/cp/typeck.c:1169
#5  0x00000000006631a7 in comptypes (t1=0x7f097e14a000, t2=0x7f097df3f7e0,
strict=0) at ../../gcc/cp/typeck.c:1298
#6  0x000000000054e11f in template_args_equal (ot=0x7f097e14a000,
nt=0x7f097df3f7e0) at ../../gcc/cp/pt.c:5924
#7  0x000000000054e38b in comp_template_args (oldargs=0x7f097e14cfa0,
newargs=0x7f097df47370) at ../../gcc/cp/pt.c:5947
#8  0x000000000066190c in structural_comptypes (t1=0x7f097e152930,
t2=0x7f097df49150, strict=0) at ../../gcc/cp/typeck.c:1169

#0  0x000000000054d873 in template_args_equal (ot=Cannot access memory at
address 0x7fffab5c5fb8) at ../../gcc/cp/pt.c:5881
#1  0x000000000054e38b in comp_template_args (oldargs=0x7f097ea9e5f0,
newargs=0x7f097e8b9528) at ../../gcc/cp/pt.c:5947
#2  0x000000000066190c in structural_comptypes (t1=0x7f097ea9fbd0,
t2=0x7f097e8baa80, strict=0) at ../../gcc/cp/typeck.c:1169
#3  0x00000000006631a7 in comptypes (t1=0x7f097ea9fbd0, t2=0x7f097e8baa80,
strict=0) at ../../gcc/cp/typeck.c:1298
#4  0x000000000054e11f in template_args_equal (ot=0x7f097ea9fbd0,
nt=0x7f097e8baa80) at ../../gcc/cp/pt.c:5924
#5  0x000000000054e38b in comp_template_args (oldargs=0x7f097e8a05c8,
newargs=0x7f097e8c1500) at ../../gcc/cp/pt.c:5947
#6  0x000000000066190c in structural_comptypes (t1=0x7f097e8a1540,
t2=0x7f097e8c33f0, strict=0) at ../../gcc/cp/typeck.c:1169
#7  0x00000000006631a7 in comptypes (t1=0x7f097e8a1540, t2=0x7f097e8c33f0,
strict=0) at ../../gcc/cp/typeck.c:1298
#8  0x000000000054e11f in template_args_equal (ot=0x7f097e8a1540,
nt=0x7f097e8c33f0) at ../../gcc/cp/pt.c:5924

This stops after one or two minutes, depending on stack ulimit.  With
an older compiler, I get this time:

time g++-4.3 -O3 -c ~/gcc/graphite/gcc/testsuite/g++.dg/graphite/pr41305.C

real    0m0.103s
user    0m0.072s
sys     0m0.012s


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spop at gcc dot gnu dot org changed:

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


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41305

[Bug c++/41305] Infinite recursion with g++ at -O0

[spop at gcc dot gnu dot org]

------- Comment #4 from spop at gcc dot gnu dot org  2009-12-23 18:15 -------
This used to work on 2009-10-15 on the graphite branch.


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spop at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
          Component|tree-optimization           |c++
           Keywords|ice-on-valid-code           |
           Priority|P3                          |P1
            Summary|ICE with -O3 -floop-        |Infinite recursion with g++
                   |interchange                 |at -O0
            Version|4.4.2                       |4.5.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41305

[Bug c++/41305] Infinite recursion with g++ at -O0

[hjl dot tools at gmail dot com]

------- Comment #5 from hjl dot tools at gmail dot com  2009-12-23 20:12 -------
It is caused by revision 153958:

http://gcc.gnu.org/ml/gcc-cvs/2009-11/msg00176.html


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hjl dot tools at gmail dot com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |jason at redhat dot com


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41305

[Bug c++/41305] Infinite recursion with g++ at -O0

[hjl dot tools at gmail dot com]

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hjl dot tools at gmail dot com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|0                           |1
   Last reconfirmed|0000-00-00 00:00:00         |2009-12-23 20:12:13
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41305

[Bug c++/41305] Infinite recursion with g++ at -O0

[jason at gcc dot gnu dot org]

-- 

jason at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|unassigned at gcc dot gnu   |jason at gcc dot gnu dot org
                   |dot org                     |
             Status|NEW                         |ASSIGNED
   Last reconfirmed|2009-12-23 20:12:13         |2009-12-24 14:07:04
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41305

[Bug c++/41305] Infinite recursion with g++ at -O0

[jason at gcc dot gnu dot org]

------- Comment #6 from jason at gcc dot gnu dot org  2009-12-24 21:03 -------
Fixed.


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jason at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |RESOLVED
         Resolution|                            |FIXED
   Target Milestone|---                         |4.5.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41305

[Bug c++/41305] Infinite recursion with g++ at -O0

[jason at gcc dot gnu dot org]

------- Comment #7 from jason at gcc dot gnu dot org  2009-12-24 21:46 -------
Subject: Bug 41305

Author: jason
Date: Thu Dec 24 21:46:14 2009
New Revision: 155461

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=155461
Log:
        PR c++/41305, DR 384
        * name-lookup.c (arg_assoc_class): Split out arg_assoc_class_only
        and arg_assoc_bases.
        (friend_of_associated_class_p): Remove.
        (arg_assoc_namespace): Don't call it.
        (arg_assoc_template_arg): Use arg_assoc_class_only for member
        template context.
        (arg_assoc_type): Handle UNION_TYPE and ENUMERAL_TYPE properly.

        * name-lookup.c (arg_assoc): Handle TEMPLATE_ID_EXPR properly.

Added:
    trunk/gcc/testsuite/g++.dg/lookup/koenig10.C
    trunk/gcc/testsuite/g++.dg/lookup/koenig11.C
    trunk/gcc/testsuite/g++.dg/lookup/koenig12.C
    trunk/gcc/testsuite/g++.dg/lookup/koenig9.C
Modified:
    trunk/gcc/cp/ChangeLog
    trunk/gcc/cp/name-lookup.c
    trunk/gcc/testsuite/ChangeLog


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41305

[Bug c++/41305] Infinite recursion with g++ at -O0

[hjl at gcc dot gnu dot org]

------- Comment #8 from hjl at gcc dot gnu dot org  2009-12-28 17:18 -------
Subject: Bug 41305

Author: hjl
Date: Mon Dec 28 17:18:22 2009
New Revision: 155491

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=155491
Log:
2009-12-28  H.J. Lu  <hongjiu.lu@intel.com>

        Backport from mainline:
        2009-12-24  Jason Merrill  <jason@redhat.com>

        PR c++/41305
        * g++.dg/lookup/koenig10.C: New test.
        * g++.dg/lookup/koenig11.C: New test.
        * g++.dg/lookup/koenig12.C: New test.

Added:
    branches/gcc-4_4-branch/gcc/testsuite/g++.dg/lookup/koenig10.C
      - copied unchanged from r155489,
trunk/gcc/testsuite/g++.dg/lookup/koenig10.C
    branches/gcc-4_4-branch/gcc/testsuite/g++.dg/lookup/koenig11.C
      - copied unchanged from r155489,
trunk/gcc/testsuite/g++.dg/lookup/koenig11.C
    branches/gcc-4_4-branch/gcc/testsuite/g++.dg/lookup/koenig12.C
      - copied unchanged from r155489,
trunk/gcc/testsuite/g++.dg/lookup/koenig12.C
Modified:
    branches/gcc-4_4-branch/gcc/testsuite/ChangeLog


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41305