[Bug c++/41775] New: ice in rewrite_stmt, at tree-into-ssa.c:1302

[Bug c++/41775] New: ice in rewrite_stmt, at tree-into-ssa.c:1302

[regehr at cs dot utah dot edu]

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This ice prevents the gcc svn head from building the LLVM svn head.

regehr@john-home:~/volatile/tmp208$ current-g++ -c -O3 small.cpp
small.cpp: In member function ‘(anonymous
namespace)::StrongPHIElimination::runOnMachineFunction(llvm::MachineFunction&)’:
small.cpp:281:1: internal compiler error: in rewrite_stmt, at
tree-into-ssa.c:1302
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.

regehr@john-home:~/volatile/tmp208$ current-g++ -v

Using built-in specs.
COLLECT_GCC=current-g++
COLLECT_LTO_WRAPPER=/home/regehr/z/tmp/gcc-r153044-install/libexec/gcc/i686-pc-linux-gnu/4.5.0/lto-wrapper
Target: i686-pc-linux-gnu
Configured with: ../configure --enable-lto
--prefix=/home/regehr/z/tmp/gcc-r153044-install --program-prefix=r153044-
--enable-languages=c,c++
Thread model: posix
gcc version 4.5.0 20091020 (experimental) (GCC)


-- 
           Summary: ice in rewrite_stmt, at tree-into-ssa.c:1302
           Product: gcc
           Version: unknown
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: regehr at cs dot utah dot edu
 GCC build triplet: i686-pc-linux-gnu
  GCC host triplet: i686-pc-linux-gnu
GCC target triplet: i686-pc-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41775

[Bug c++/41775] ice in rewrite_stmt, at tree-into-ssa.c:1302

[regehr at cs dot utah dot edu]

------- Comment #1 from regehr at cs dot utah dot edu  2009-10-21 04:13 -------
Created an attachment (id=18848)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=18848&action=view)
failure inducing input


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41775

[Bug tree-optimization/41775] [4.5 Regression] IPA-SRA: ice in rewrite_stmt, at tree-into-ssa.c:1302

[rguenth at gcc dot gnu dot org]

------- Comment #2 from rguenth at gcc dot gnu dot org  2009-10-21 12:31 -------
Confirmed.

Looks like invalid tree-sharing.  On

(gdb) call debug_gimple_stmt (stmt)
# .MEM = VDEF <.MEM>
llvm::LiveInterval::removeRange (PI_10, D.2378_13->start, D.2378_13->end, 1);

we have replaced the first use but on replacing the 2nd one
the INDIRECT_REF was shared.

Both built from

#1  0x0888e476 in build_ref_for_offset_1 (res=0xbffff068, type=0xb7d72a8c, 
    offset=0, exp_type=0xb7d728fc)
    at /home/richard/src/trunk/gcc/tree-sra.c:1255
1255                      expr = build3 (COMPONENT_REF, TREE_TYPE (fld), *res,
fld,

without unsharing *res.

Thus, this is IPA-SRA.


-- 

rguenth at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |jamborm at gcc dot gnu dot
                   |                            |org
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|0                           |1
           Keywords|                            |ice-on-valid-code
      Known to work|                            |4.4.2
   Last reconfirmed|0000-00-00 00:00:00         |2009-10-21 12:31:40
               date|                            |
            Summary|ice in rewrite_stmt, at     |[4.5 Regression] IPA-SRA:
                   |tree-into-ssa.c:1302        |ice in rewrite_stmt, at
                   |                            |tree-into-ssa.c:1302
   Target Milestone|---                         |4.5.0
            Version|unknown                     |4.5.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41775

[Bug tree-optimization/41775] [4.5 Regression] IPA-SRA: ice in rewrite_stmt, at tree-into-ssa.c:1302

[jamborm at gcc dot gnu dot org]

-- 

jamborm at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|unassigned at gcc dot gnu   |jamborm at gcc dot gnu dot
                   |dot org                     |org
             Status|NEW                         |ASSIGNED
   Last reconfirmed|2009-10-21 12:31:40         |2009-10-21 15:05:11
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41775

[Bug tree-optimization/41775] [4.5 Regression] IPA-SRA: ice in rewrite_stmt, at tree-into-ssa.c:1302

[rguenth at gcc dot gnu dot org]

-- 

rguenth at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Priority|P3                          |P1
            Version|unknown                     |4.5.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41775

[Bug tree-optimization/41775] [4.5 Regression] IPA-SRA: ice in rewrite_stmt, at tree-into-ssa.c:1302

[jamborm at gcc dot gnu dot org]

------- Comment #3 from jamborm at gcc dot gnu dot org  2009-10-26 21:53 -------
Created an attachment (id=18903)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=18903&action=view)
Proposed fix

Indeed, the users of build_ref_for_offset in ipa-prop.c and ipa-cp.c
do not unshare the base expressions they should.  I have looked at all
other users and found that they either pass declarations or do their
own unsharing and so decided to move the unsharing to
build_ref_for_offset itself.  The attached patch fixes the ICE when
compiling the testcase, I am currently bootstrapping it.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41775

[Bug tree-optimization/41775] [4.5 Regression] IPA-SRA: ice in rewrite_stmt, at tree-into-ssa.c:1302

[jamborm at gcc dot gnu dot org]

------- Comment #4 from jamborm at gcc dot gnu dot org  2009-10-27 18:04 -------
I have just sent the patch to the mailing list:

http://gcc.gnu.org/ml/gcc-patches/2009-10/msg01625.html

I had to change the testcase a bit so that it compiles on x86_64.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41775

[Bug tree-optimization/41775] [4.5 Regression] IPA-SRA: ice in rewrite_stmt, at tree-into-ssa.c:1302

[ubizjak at gmail dot com]

------- Comment #5 from ubizjak at gmail dot com  2009-10-27 19:35 -------
(In reply to comment #4)
> I have just sent the patch to the mailing list:
> 
> http://gcc.gnu.org/ml/gcc-patches/2009-10/msg01625.html
> 
> I had to change the testcase a bit so that it compiles on x86_64.

You should also add:

 // { dg-require-visibility "" }


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41775

[Bug tree-optimization/41775] [4.5 Regression] IPA-SRA: ice in rewrite_stmt, at tree-into-ssa.c:1302

[jamborm at gcc dot gnu dot org]

------- Comment #6 from jamborm at gcc dot gnu dot org  2009-10-29 12:41 -------
Subject: Bug 41775

Author: jamborm
Date: Thu Oct 29 12:40:48 2009
New Revision: 153699

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=153699
Log:
2009-10-29  Martin Jambor  <mjambor@suse.cz>

        PR tree-optimization/41775
        * tree-sra.c (build_ref_for_offset): Unshare *expr if not NULL.
        (generate_subtree_copies): Do not unshare agg.
        (load_assign_lhs_subreplacements): Do not unshare rhs.
        (sra_modify_assign): Do not unshare exprs.
        (propagate_subacesses_accross_link): Renamed to
        propagate_subaccesses_across_link.

        * testsuite/g++.dg/torture/pr41775.C: New testcase.



Added:
    trunk/gcc/testsuite/g++.dg/torture/pr41775.C
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-sra.c


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41775

[Bug tree-optimization/41775] [4.5 Regression] IPA-SRA: ice in rewrite_stmt, at tree-into-ssa.c:1302

[jamborm at gcc dot gnu dot org]

------- Comment #7 from jamborm at gcc dot gnu dot org  2009-10-29 12:50 -------
I did.  This is now fixed.


-- 

jamborm at gcc dot gnu dot org changed:

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


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41775

[Bug tree-optimization/41775] [4.5 Regression] IPA-SRA: ice in rewrite_stmt, at tree-into-ssa.c:1302

[hjl at gcc dot gnu dot org]

------- Comment #8 from hjl at gcc dot gnu dot org  2009-10-30 16:05 -------
Subject: Bug 41775

Author: hjl
Date: Fri Oct 30 16:04:41 2009
New Revision: 153759

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=153759
Log:
2009-10-30  H.J. Lu  <hongjiu.lu@intel.com>

        Backport from mainline:
        2009-10-30  Dodji Seketeli  <dodji@redhat.com>

        PR c++/41863
        * g++.dg/template/sizeof12.C: New test.

        2009-10-29  Martin Jambor  <mjambor@suse.cz>

        PR tree-optimization/41775
        * g++.dg/torture/pr41775.C: New testcase.

        2009-10-28  Jakub Jelinek  <jakub@redhat.com>

        PR debug/41801
        * g++.dg/ext/sync-3.C: New test.

        2009-10-27  Jakub Jelinek  <jakub@redhat.com>

        PR c++/41020
        * g++.dg/lookup/extern-c-redecl5.C: Fix up regexp.

        2009-10-26  Jakub Jelinek  <jakub@redhat.com>

        PR bootstrap/41345
        * gcc.dg/pr41345.c: New test.

        2009-10-26  Dodji Seketeli  <dodji@redhat.com>

        PR c++/41785
        * g++.dg/cpp0x/variadic96.C: New test.

        2009-10-26  Dodji Seketeli  <dodji@redhat.com>

        PR c++/41020
        * g++.dg/lookup/extern-c-redecl2.C: New test.
        * g++.dg/lookup/extern-c-redecl3.C: Likewise.
        * g++.dg/lookup/extern-c-redecl4.C: Likewise.
        * g++.dg/lookup/extern-c-redecl5.C: Likewise.

        2009-10-23  Joseph Myers  <joseph@codesourcery.com>

        PR c/40033
        * gcc.dg/noncompile/pr40033-1.c: New test.

        2009-10-23  Joseph Myers  <joseph@codesourcery.com>

        PR c/41673
        * gcc.dg/Wstrict-aliasing-bogus-vla-1.c: New test.

        2009-10-21  Sebastian Pop  <sebastian.pop@amd.com>

        PR tree-optimization/41497
        * gcc.dg/tree-ssa/pr41497.c: New.

Added:
    branches/gcc-4_4-branch/gcc/testsuite/g++.dg/cpp0x/variadic96.C
      - copied unchanged from r153757,
trunk/gcc/testsuite/g++.dg/cpp0x/variadic96.C
    branches/gcc-4_4-branch/gcc/testsuite/g++.dg/ext/sync-3.C
      - copied unchanged from r153757, trunk/gcc/testsuite/g++.dg/ext/sync-3.C
    branches/gcc-4_4-branch/gcc/testsuite/g++.dg/lookup/extern-c-redecl2.C
      - copied unchanged from r153757,
trunk/gcc/testsuite/g++.dg/lookup/extern-c-redecl2.C
    branches/gcc-4_4-branch/gcc/testsuite/g++.dg/lookup/extern-c-redecl3.C
      - copied unchanged from r153757,
trunk/gcc/testsuite/g++.dg/lookup/extern-c-redecl3.C
    branches/gcc-4_4-branch/gcc/testsuite/g++.dg/lookup/extern-c-redecl4.C
      - copied unchanged from r153757,
trunk/gcc/testsuite/g++.dg/lookup/extern-c-redecl4.C
    branches/gcc-4_4-branch/gcc/testsuite/g++.dg/lookup/extern-c-redecl5.C
      - copied unchanged from r153757,
trunk/gcc/testsuite/g++.dg/lookup/extern-c-redecl5.C
    branches/gcc-4_4-branch/gcc/testsuite/g++.dg/template/sizeof12.C
      - copied unchanged from r153757,
trunk/gcc/testsuite/g++.dg/template/sizeof12.C
    branches/gcc-4_4-branch/gcc/testsuite/g++.dg/torture/pr41775.C
      - copied unchanged from r153757,
trunk/gcc/testsuite/g++.dg/torture/pr41775.C
    branches/gcc-4_4-branch/gcc/testsuite/gcc.dg/Wstrict-aliasing-bogus-vla-1.c
      - copied unchanged from r153758,
trunk/gcc/testsuite/gcc.dg/Wstrict-aliasing-bogus-vla-1.c
    branches/gcc-4_4-branch/gcc/testsuite/gcc.dg/noncompile/pr40033-1.c
      - copied unchanged from r153758,
trunk/gcc/testsuite/gcc.dg/noncompile/pr40033-1.c
    branches/gcc-4_4-branch/gcc/testsuite/gcc.dg/pr41345.c
      - copied unchanged from r153757, trunk/gcc/testsuite/gcc.dg/pr41345.c
    branches/gcc-4_4-branch/gcc/testsuite/gcc.dg/tree-ssa/pr41497.c
      - copied unchanged from r153758,
trunk/gcc/testsuite/gcc.dg/tree-ssa/pr41497.c
Modified:
    branches/gcc-4_4-branch/gcc/testsuite/ChangeLog


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41775