[Bug tree-optimization/18425] New: ICE in vector.tcc when -ftree-vectorize enabled

[Bug tree-optimization/18425] New: ICE in vector.tcc when -ftree-vectorize enabled

[senor_fjord at yahoo dot com]

I reduced the problem to a small, albeit nonsensical, test case:

#include <vector>

void foo() {
  std::vector<char *> v;

  while (1)
    v.resize(1);
}

I'm compiling with -O3 -ftree-vectorize -march=pentium4 on gcc 4.0.0(20041110).
I think this is related to bug 18397, but since it's unconfirmed I figured it
may help to have another case.

-- 
           Summary: ICE in vector.tcc when -ftree-vectorize enabled
           Product: gcc
           Version: 4.0.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: tree-optimization
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: senor_fjord at yahoo dot com
                CC: gcc-bugs at gcc dot gnu dot org
 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=18425

[Bug tree-optimization/18425] ICE in vector.tcc when -ftree-vectorize enabled

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2004-11-11 05:50 -------
Confirmed but not reduced (reducing it right now) but I have a fix, once I reduce this I will submit the 
fix for this.

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |pinskia at gcc dot gnu dot
                   |                            |org
           Keywords|                            |ice-on-valid-code


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18425

[Bug tree-optimization/18425] ICE in vector.tcc when -ftree-vectorize enabled

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2004-11-11 07:03 -------
Confirmed, reduced all the way down to:
char **      _M_allocate();
void
_M_fill_insert(unsigned int __n)
{
  char **__new_start = _M_allocate();
  char *__tmp = 0;
  for (; __n > 0; --__n, ++__new_start)
    *__new_start = __tmp;
}


-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|unassigned at gcc dot gnu   |pinskia at gcc dot gnu dot
                   |dot org                     |org
             Status|UNCONFIRMED                 |ASSIGNED
     Ever Confirmed|                            |1
   Last reconfirmed|0000-00-00 00:00:00         |2004-11-11 07:03:51
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18425

[Bug tree-optimization/18425] ICE in vector.tcc when -ftree-vectorize enabled

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2004-11-11 07:14 -------
*** Bug 18397 has been marked as a duplicate of this bug. ***

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


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18425

[Bug tree-optimization/18425] ICE in vector.tcc when -ftree-vectorize enabled

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2004-11-11 07:21 -------
Patch posted here: <http://gcc.gnu.org/ml/gcc-patches/2004-11/msg00875.html>

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |patch


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18425

[Bug tree-optimization/18425] ICE in vector.tcc when -ftree-vectorize enabled

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2004-11-11 15:11 -------
Dorit posted a better patch: <http://gcc.gnu.org/ml/gcc-patches/2004-11/msg00889.html>.

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|pinskia at gcc dot gnu dot  |unassigned at gcc dot gnu
                   |org                         |dot org
             Status|ASSIGNED                    |NEW


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18425

[Bug tree-optimization/18425] ICE in vector.tcc when -ftree-vectorize enabled

[cvs-commit at gcc dot gnu dot org]

------- Additional Comments From cvs-commit at gcc dot gnu dot org  2004-11-14 18:25 -------
Subject: Bug 18425

CVSROOT:	/cvs/gcc
Module name:	gcc
Changes by:	dorit@gcc.gnu.org	2004-11-14 18:25:35

Modified files:
	gcc            : ChangeLog tree-vectorizer.c 

Log message:
	2004-11-14  Dorit Naishlos  <dorit@il.ibm.com>
	Andrew Pinski  <pinskia@physics.uc.edu>
	
	PR tree-opt/18425
	* tree-vectorize.c (vect_build_loop_niters): Do not insert
	NULL into the instruction stream. Initialize new_bb to NULL.
	(vect_update_ivs_after_vectorizer): Likewise.
	(vect_gen_niters_for_prolog_loop): Likewise.

Patches:
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/ChangeLog.diff?cvsroot=gcc&r1=2.6333&r2=2.6334
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/tree-vectorizer.c.diff?cvsroot=gcc&r1=2.28&r2=2.29



-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18425

[Bug tree-optimization/18425] ICE in vector.tcc when -ftree-vectorize enabled

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2004-11-14 18:31 -------
Fixed.

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |FIXED
   Target Milestone|---                         |4.0.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18425

[Bug tree-optimization/18425] ICE in vector.tcc when -ftree-vectorize enabled

[cvs-commit at gcc dot gnu dot org]

------- Additional Comments From cvs-commit at gcc dot gnu dot org  2004-11-14 20:45 -------
Subject: Bug 18425

CVSROOT:	/cvs/gcc
Module name:	gcc
Changes by:	dorit@gcc.gnu.org	2004-11-14 20:44:52

Modified files:
	gcc/testsuite  : ChangeLog 
Added files:
	gcc/testsuite/gcc.dg/vect: pr18400.c pr18425.c 

Log message:
	2004-11-14  Dorit Naishlos  <dorit@il.ibm.com>
	
	PR tree-opt/18400
	* gcc.dg/vect/pr18400.c: New test.
	
	2004-11-14  Dorit Naishlos  <dorit@il.ibm.com>
	Andrew Pinski  <pinskia@physics.uc.edu>
	
	PR tree-opt/18425
	* gcc.dg/vect/pr18425.c: New test.

Patches:
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/ChangeLog.diff?cvsroot=gcc&r1=1.4599&r2=1.4600
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/gcc.dg/vect/pr18400.c.diff?cvsroot=gcc&r1=NONE&r2=1.1
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/gcc.dg/vect/pr18425.c.diff?cvsroot=gcc&r1=NONE&r2=1.1



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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18425