[Bug tree-optimization/36991] New: internal compiler error: in remove_useless_stmts_1, at tree-cfg.c:1882

[Bug tree-optimization/36991] New: internal compiler error: in remove_useless_stmts_1, at tree-cfg.c:1882

[eagle at cs dot ucla dot edu]

Output of gcc -v

Using built-in specs.
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Ubuntu 4.3.1-8ubuntu1'
--with-bugurl=file:///usr/share/doc/gcc-4.3/README.Bugs
--enable-languages=c,c++,fortran,objc,obj-c++ --prefix=/usr --enable-shared
--with-system-zlib --libexecdir=/usr/lib --without-included-gettext
--enable-threads=posix --enable-nls --with-gxx-include-dir=/usr/include/c++/4.3
--program-suffix=-4.3 --enable-clocale=gnu --enable-libstdcxx-debug
--enable-objc-gc --enable-mpfr --enable-checking=release
--build=x86_64-linux-gnu --host=x86_64-linux-gnu --target=x86_64-linux-gnu
Thread model: posix
gcc version 4.3.1 (Ubuntu 4.3.1-8ubuntu1)


-- 
           Summary: internal compiler error: in remove_useless_stmts_1, at
                    tree-cfg.c:1882
           Product: gcc
           Version: 4.3.1
            Status: UNCONFIRMED
          Severity: major
          Priority: P3
         Component: tree-optimization
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: eagle at cs dot ucla dot edu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36991

[Bug tree-optimization/36991] internal compiler error: in remove_useless_stmts_1, at tree-cfg.c:1882

[eagle at cs dot ucla dot edu]

------- Comment #1 from eagle at cs dot ucla dot edu  2008-07-31 18:38 -------
Created an attachment (id=15986)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=15986&action=view)
preprocessed source


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36991

[Bug tree-optimization/36991] internal compiler error: in remove_useless_stmts_1, at tree-cfg.c:1882

[eagle at cs dot ucla dot edu]

------- Comment #2 from eagle at cs dot ucla dot edu  2008-07-31 18:38 -------
command line:
gcc -std=gnu99 temp.i


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36991

[Bug tree-optimization/36991] [4.3/4.4 Regression] ICE in remove_useless_stmts_1, at tree-cfg.c:1882

[rguenth at gcc dot gnu dot org]

------- Comment #3 from rguenth at gcc dot gnu dot org  2008-08-01 11:15 -------
Confirmed.  Reduced testcase:

typedef float v4sf __attribute__ ((vector_size(16)));
typedef v4sf v4;
typedef union {
  v4sf v[4][4];
} m4v4;
void skew3(const v4 _v, m4v4 *dV2_dv)
{
  float *v = ((float *) &_v);
  if (dV2_dv)
    dV2_dv->v[1][0] = dV2_dv->v[0][1] = (v4){ v[1], v[0], 0., 0};
}


-- 

rguenth at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|0                           |1
           Keywords|                            |ice-on-valid-code
      Known to fail|                            |4.3.1 4.4.0
      Known to work|                            |4.2.4
   Last reconfirmed|0000-00-00 00:00:00         |2008-08-01 11:15:10
               date|                            |
            Summary|internal compiler error: in |[4.3/4.4 Regression] ICE in
                   |remove_useless_stmts_1, at  |remove_useless_stmts_1, at
                   |tree-cfg.c:1882             |tree-cfg.c:1882
   Target Milestone|---                         |4.3.2


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36991

[Bug tree-optimization/36991] [4.3/4.4 Regression] ICE in remove_useless_stmts_1, at tree-cfg.c:1882

[rguenth at gcc dot gnu dot org]

------- Comment #4 from rguenth at gcc dot gnu dot org  2008-08-01 11:21 -------
After gimplification we have

      D.1560 = {D.1558, D.1559, 0.0, 0.0};
      dV2_dv->v[0][1] = D.1560;
      D.1561 = dV2_dv->v[0][1];
      dV2_dv->v[1][0] = D.1561;

but

dV2_dv->v[0][1] = D.1560

seems to be still a MODIFY_EXPR.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36991

[Bug tree-optimization/36991] [4.3 Regression] ICE in remove_useless_stmts_1, at tree-cfg.c:1882

[rguenth at gcc dot gnu dot org]

------- Comment #5 from rguenth at gcc dot gnu dot org  2008-08-01 11:36 -------
Actually the 4.4 ICE is different.


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rguenth at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
      Known to fail|4.3.1 4.4.0                 |4.3.1
      Known to work|4.2.4                       |4.2.4 4.4.0
            Summary|[4.3/4.4 Regression] ICE in |[4.3 Regression] ICE in
                   |remove_useless_stmts_1, at  |remove_useless_stmts_1, at
                   |tree-cfg.c:1882             |tree-cfg.c:1882


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36991

[Bug tree-optimization/36991] [4.3 Regression] ICE in remove_useless_stmts_1, at tree-cfg.c:1882

[jakub at gcc dot gnu dot org]

------- Comment #6 from jakub at gcc dot gnu dot org  2008-08-01 13:08 -------
Looking into this.


-- 

jakub at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|unassigned at gcc dot gnu   |jakub at gcc dot gnu dot org
                   |dot org                     |
             Status|NEW                         |ASSIGNED
   Last reconfirmed|2008-08-01 11:15:10         |2008-08-01 13:08:15
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36991

[Bug tree-optimization/36991] [4.3 Regression] ICE in remove_useless_stmts_1, at tree-cfg.c:1882

[jakub at gcc dot gnu dot org]

------- Comment #7 from jakub at gcc dot gnu dot org  2008-08-01 13:55 -------
Missing tree_to_gimple_tuple call in gimplify_init_constructor when want_value.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36991

[Bug tree-optimization/36991] [4.3 Regression] ICE in remove_useless_stmts_1, at tree-cfg.c:1882

[jakub at gcc dot gnu dot org]

------- Comment #8 from jakub at gcc dot gnu dot org  2008-08-01 18:59 -------
Subject: Bug 36991

Author: jakub
Date: Fri Aug  1 18:58:24 2008
New Revision: 138529

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=138529
Log:
        PR tree-optimization/36991
        * gimplify.c (gimplify_init_constructor): Call tree_to_gimple_tuple
        on expr_p before appending it to pre_p.

        * gcc.dg/pr36991.c: New test.

Added:
    branches/gcc-4_3-branch/gcc/testsuite/gcc.dg/pr36991.c
Modified:
    branches/gcc-4_3-branch/gcc/ChangeLog
    branches/gcc-4_3-branch/gcc/gimplify.c
    branches/gcc-4_3-branch/gcc/testsuite/ChangeLog


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36991

[Bug tree-optimization/36991] [4.3 Regression] ICE in remove_useless_stmts_1, at tree-cfg.c:1882

[jakub at gcc dot gnu dot org]

------- Comment #9 from jakub at gcc dot gnu dot org  2008-08-01 19:02 -------
Fixed.


-- 

jakub at gcc dot gnu dot org changed:

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


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36991

[Bug tree-optimization/36991] [4.3 Regression] ICE in remove_useless_stmts_1, at tree-cfg.c:1882

[jakub at gcc dot gnu dot org]

------- Comment #10 from jakub at gcc dot gnu dot org  2008-08-01 19:02 -------
Subject: Bug 36991

Author: jakub
Date: Fri Aug  1 19:01:33 2008
New Revision: 138530

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=138530
Log:
2008-08-01  Jakub Jelinek  <jakub@redhat.com>

        PR tree-optimization/36991
        * gcc.dg/pr36991.c: New test.

Added:
    trunk/gcc/testsuite/gcc.dg/pr36991.c
Modified:
    trunk/gcc/testsuite/ChangeLog


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36991