[Bug c++/21274] New: SSA Crash, reproducable

[Bug c++/21274] New: SSA Crash, reproducable

[callahan at sci dot utah dot edu]

[-- Warning: decoded text below may be mangled, UTF-8 assumed --]
[-- Attachment #1: Type: text/plain, Size: 2128 bytes --]

The g++-4.0 in the Ubuntu Hoary repository crashes on the following file.



------- crash-4.0.cc starts here ---------------------------------------
/*

prompt> g++-4.0 -msse2 -O3 -ftree-vectorize -ftree-vectorizer-verbose=5 -c
crash-4.0.cc
crash-4.0.cc:11: note: Alignment of access forced using peeling.
crash-4.0.cc:11: note: LOOP VECTORIZED.
crash-4.0.cc:26: note: Alignment of access forced using peeling.crash-4.0.cc: In
function ‘DenseMatrix* mat_identity(int)’:
crash-4.0.cc:21: internal compiler error: in gimplify_expr, at gimplify.c:4070
Please submit a full bug report,
with preprocessed source if appropriate.
See <URL:http://gcc.gnu.org/bugs.html> for instructions.
For Debian GNU/Linux specific bug reporting instructions,
see <URL:file:///usr/share/doc/gcc-4.0/README.Bugs>.

prompt> g++-4.0 --version
 g++-4.0 (GCC) 4.0.0 20050301 (prerelease) (Debian 4.0-0pre6ubuntu7)
Copyright (C) 2005 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

prompt> uname -a
Linux tamale 2.6.10-5-amd64-generic #1 Tue Apr 5 12:21:57 UTC 2005 x86_64 GNU/Linux

*/

class DenseMatrix
{
  int rows_, cols_;
  double *ptr_;
public:
  DenseMatrix(int nr, int nc) : rows_(nr), cols_(nc)
  {
    ptr_ = new double[nr * nc];
  }
  
  void zero() { for (int i = 0; i < rows_ * cols_; i++) ptr_[i] = 0.0; } 

  inline double* operator[](int r)
  {
    return ptr_ + r * cols_;
  }
};


//! Create Identity Matrix
DenseMatrix *mat_identity(int len) 
{
  DenseMatrix *eye = new DenseMatrix(len, len);

  eye->zero();
  for (int i=0; i<len; i++)
  {
    (*eye)[i][i]=1;
  }
  return eye;
}

-- 
           Summary: SSA Crash, reproducable
           Product: gcc
           Version: 4.0.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: callahan at sci dot utah dot edu
                CC: gcc-bugs at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21274

[Bug c++/21274] SSA Crash, reproducable

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2005-04-29 07:14 -------
Hmm, "4.0.0 20050301", I am thinking you should try a 4.0.0 release compiler.

-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21274

[Bug c++/21274] SSA Crash, reproducable

[callahan at sci dot utah dot edu]

------- Additional Comments From callahan at sci dot utah dot edu  2005-04-29 13:57 -------
Not me.  I have lots to do and this is relatively unimportant.  I just thought
someone there might like the short test case.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21274

[Bug c++/21274] SSA Crash, reproducable

[dorit at il dot ibm dot com]

------- Additional Comments From dorit at il dot ibm dot com  2005-05-02 16:27 -------
Thanks for the testcase.

I tried reproducing the problem on i686-pc-linux-gnu with today's snapshot of 
4.1, and also with today's snapshot of 4.0 (gcc version 4.0.1 20050502 
(prerelease)) - I can't reproduce it with these snapshots. Maybe the problem 
had already been solved. Just FYI, I get:
"
pr21274.cc:11: note: Alignment of access forced using peeling.
pr21274.cc:11: note: LOOP VECTORIZED.

pr21274.cc:26: note: not vectorized: pointer access is not simple.
pr21274.cc:26: note: not vectorized: unhandled data ref: *D.1981_38 = 1.0e+0

pr21274.cc:21: note: vectorized 1 loops in function.
"

Which means we don't try to peel the loop in line 26 anymore (from your report 
it looks like we used to peel that loop with the snapshot you are using:
"crash-4.0.cc:26: note: Alignment of access forced using peeling.crash-4.0.cc")

-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21274

[Bug c++/21274] SSA Crash, reproducable

[callahan at sci dot utah dot edu]

------- Additional Comments From callahan at sci dot utah dot edu  2005-05-02 16:36 -------
I suspect that this is an x86-64 bug.

I have a different computer available to me here.  I get the same result as
Dorit.  Note that it appears to be the same Ubuntu beta version as the x86-64
version.  I recommend have someone run it on a recent x86-64 and if it's not a
problem there then just close out the bug.


callahan@carnitas:/tmp$ g++-4.0 -msse2 -O3 -ftree-vectorize
-ftree-vectorizer-verbose=5 -c testcast.o testcast.cc
g++-4.0: testcast.o: No such file or directory

testcast.cc:11: note: Alignment of access forced using peeling.
testcast.cc:11: note: LOOP VECTORIZED.
testcast.cc:26: note: not vectorized: pointer access is not simple.
testcast.cc:26: note: not vectorized: unhandled data ref: *D.1981_38 = 1.0e+0
testcast.cc:21: note: vectorized 1 loops in function.
callahan@carnitas:/tmp$ g++-4.0 --version
g++-4.0 (GCC) 4.0.0 20050301 (prerelease) (Debian 4.0-0pre6ubuntu7)
Copyright (C) 2005 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21274

[Bug c++/21274] SSA Crash, reproducable

[callahan at sci dot utah dot edu]

------- Additional Comments From callahan at sci dot utah dot edu  2005-09-13 19:32 -------
Subject: Re:  SSA Crash, reproducable

This still crashes for me with the latest Ubuntu g++ build.

g++ (GCC) 4.0.2 20050808 (prerelease) (Debian 4.0.1-4ubuntu6)

The error is the same, but the crash is line 4186.

  Michael

On Mon, 2005-05-02 at 16:36 +0000, callahan at sci dot utah dot edu
wrote:
> ------- Additional Comments From callahan at sci dot utah dot edu  2005-05-02 16:36 -------
> I suspect that this is an x86-64 bug.
> 
> I have a different computer available to me here.  I get the same result as
> Dorit.  Note that it appears to be the same Ubuntu beta version as the x86-64
> version.  I recommend have someone run it on a recent x86-64 and if it's not a
> problem there then just close out the bug.
> 
> 
> callahan@carnitas:/tmp$ g++-4.0 -msse2 -O3 -ftree-vectorize
> -ftree-vectorizer-verbose=5 -c testcast.o testcast.cc
> g++-4.0: testcast.o: No such file or directory
> 
> testcast.cc:11: note: Alignment of access forced using peeling.
> testcast.cc:11: note: LOOP VECTORIZED.
> testcast.cc:26: note: not vectorized: pointer access is not simple.
> testcast.cc:26: note: not vectorized: unhandled data ref: *D.1981_38 = 1.0e+0
> testcast.cc:21: note: vectorized 1 loops in function.
> callahan@carnitas:/tmp$ g++-4.0 --version
> g++-4.0 (GCC) 4.0.0 20050301 (prerelease) (Debian 4.0-0pre6ubuntu7)
> Copyright (C) 2005 Free Software Foundation, Inc.
> This is free software; see the source for copying conditions.  There is NO
> warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
> 



-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21274

[Bug c++/21274] SSA Crash, reproducable

[pinskia at gcc dot gnu dot org]

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
 GCC target triplet|                            |x86_64-unknown-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21274

[Bug middle-end/21274] SSA Crash, reproducable

[pinskia at gcc dot gnu dot org]

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
          Component|c++                         |middle-end


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21274

[Bug tree-optimization/21274] SSA Crash, reproducable

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2005-09-13 19:45 -------
Hmm, we are trying to gimplify a SCEV tree:
(<unnamed type>) ((long unsigned intD.7) {0, +, D.2009_8}_2 * 8)


-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
          Component|middle-end                  |tree-optimization
     Ever Confirmed|                            |1
           Keywords|                            |ice-on-valid-code
   Last reconfirmed|0000-00-00 00:00:00         |2005-09-13 19:45:09
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21274

[Bug tree-optimization/21274] SSA Crash, reproducable

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2005-09-13 19:48 -------
Fixed on the mainline and since this is not a regression closing as fixed.

Fixed with 4.1.0 20050802 and 4.1.0 20050714.

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |FIXED
   Target Milestone|---                         |4.1.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21274

[Bug tree-optimization/21274] SSA Crash, reproducable

[fche at gcc dot gnu dot org]

------- Comment #8 from fche at gcc dot gnu dot org  2006-06-21 16:35 -------
Subject: Bug 21274

Author: fche
Date: Wed Jun 21 16:35:27 2006
New Revision: 114855

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=114855
Log:
2006-06-21  Frank Ch. Eigler  <fche@redhat.com>

        PR 21274
        mf-runtime.h installation based on ssp patch for PR 26473 from
        Mark Mitchell  <mark@codesourcery.com>.
        * configure.ac (ACX_NONCANONICAL_TARGET): Use it.
        * Makefile.am (target_noncanonical): Define.
        (libsubincludedir): New variable.
        (nobase_libsubinclude_HEADERS): Add mf-runtime.h.
        (include_HEADERS): Remove.
        * configure, aclocal.m4, config.h.in: Regenerated.
        * Makefile.in, testsuite/Makefile.in: Likewise.
        * mf-runtime.h: Add #ifndef protection for conflicting _REENTRANT
        and _THREAD_SAFE redefinition values.


Modified:
    trunk/libmudflap/ChangeLog
    trunk/libmudflap/Makefile.am
    trunk/libmudflap/Makefile.in
    trunk/libmudflap/aclocal.m4
    trunk/libmudflap/config.h.in
    trunk/libmudflap/configure
    trunk/libmudflap/configure.ac
    trunk/libmudflap/mf-runtime.h
    trunk/libmudflap/testsuite/Makefile.in


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21274