[Bug tree-optimization/23817] New: ICE in check_loop_closed_ssa_use, at tree-ssa-loop-manip.c:398

[Bug tree-optimization/23817] New: ICE in check_loop_closed_ssa_use, at tree-ssa-loop-manip.c:398

[belyshev at depni dot sinp dot msu dot ru]

// test case, compile with -O3

int foo1 (void);
void foo2 (int);

static int foo9 (int k)
{
  return ((k == 0x00) || (k == 0x10) || (k == 0x14));
}

static int foo8 (int *p)
{
  return *p;
}

void foo6 (int *p)
{
  int a, b, c, d, e = 0;
  foo8 (p);
  b = 0;
  do
    {
      b++;
      a = foo1();
    }
  while (b < 3 && (!foo9 (a)));
 repeat:
  d = 3;
  do
    {
      c = foo1 ();
      if (c)
        foo1 ();
      d--;
    }
  while (c && d);
  if (c && !e)
    {
      foo2 (c);
      return;
    }
  if (!e)
    {
      e = 1;
      goto repeat;
    }
}

// compiler output:
sd.i: In function 'foo6':
sd.i:15: internal compiler error: in check_loop_closed_ssa_use, at
tree-ssa-loop-manip.c:398

-- 
           Summary: ICE in check_loop_closed_ssa_use, at tree-ssa-loop-
                    manip.c:398
           Product: gcc
           Version: 4.1.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code
          Severity: normal
          Priority: P2
         Component: tree-optimization
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: belyshev at depni dot sinp dot msu dot ru
                CC: gcc-bugs at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23817

[Bug tree-optimization/23817] ICE in check_loop_closed_ssa_use, at tree-ssa-loop-manip.c:398

[belyshev at depni dot sinp dot msu dot ru]

------- Additional Comments From belyshev at depni dot sinp dot msu dot ru  2005-09-11 10:39 -------
// another testcase, compile with -O3

int b;
void foo1 (int);

void foo (void)
{
  int i, j, k, l;
  short v;
  for (i = 0; i < 10; i ++)
    {
      for (l = 0; l < 10; l++)
	{
	  asm volatile ("\n" : "=a" (v));
	  j = v;
	  if (j)
	    {
	      k = 1;
	      goto out;
	    }
	}
      if (b)
	foo1 (j);
      k = 0;
    out:
      if (!k)
	return;
    }
}


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23817

[Bug tree-optimization/23817] [4.1 Regression] ICE in check_loop_closed_ssa_use, at tree-ssa-loop-manip.c:398

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2005-09-11 14:31 -------
Confirmed a regression.

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |pinskia at gcc dot gnu dot
                   |                            |org
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|                            |1
   Last reconfirmed|0000-00-00 00:00:00         |2005-09-11 14:31:58
               date|                            |
            Summary|ICE in                      |[4.1 Regression] ICE in
                   |check_loop_closed_ssa_use,  |check_loop_closed_ssa_use,
                   |at tree-ssa-loop-manip.c:398|at tree-ssa-loop-manip.c:398
   Target Milestone|---                         |4.1.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23817

[Bug tree-optimization/23817] [4.1 Regression] ICE in check_loop_closed_ssa_use, at tree-ssa-loop-manip.c:398

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2005-09-11 15:23 -------
This is after complete unrolling.

-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23817

[Bug tree-optimization/23817] [4.1 Regression] ICE in check_loop_closed_ssa_use, at tree-ssa-loop-manip.c:398

[rakdver at gcc dot gnu dot org]

------- Additional Comments From rakdver at gcc dot gnu dot org  2005-09-11 15:35 -------
Smaller testcase:

int b;
void foo1 (int);

void foo (void)
{
  int i, j, k, l;
  short v;
  for (i = 0; i < 10; i ++)
    {
      for (l = 0; l < 10; l++)
        {
          asm volatile ("\n" : "=a" (v));
          j = v;
          if (j)
            goto out;
        }
      if (b)
        foo1 (j);
      return;
out: ;
    }
}


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


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23817

[Bug tree-optimization/23817] [4.1 Regression] ICE in check_loop_closed_ssa_use, at tree-ssa-loop-manip.c:398

[rakdver at gcc dot gnu dot org]

------- Additional Comments From rakdver at gcc dot gnu dot org  2005-09-12 09:32 -------
Patch.

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
                URL|                            |http://gcc.gnu.org/ml/gcc-
                   |                            |patches/2005-
                   |                            |09/msg00706.html


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23817

[Bug tree-optimization/23817] [4.1 Regression] ICE in check_loop_closed_ssa_use, at tree-ssa-loop-manip.c:398

[cvs-commit at gcc dot gnu dot org]

------- Additional Comments From cvs-commit at gcc dot gnu dot org  2005-09-13 07:33 -------
Subject: Bug 23817

CVSROOT:	/cvs/gcc
Module name:	gcc
Changes by:	rakdver@gcc.gnu.org	2005-09-13 07:33:50

Modified files:
	gcc            : ChangeLog tree-cfg.c 

Log message:
	PR tree-optimize/23817
	* tree-cfg.c (tree_merge_blocks): Preserve loop closed ssa.

Patches:
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/ChangeLog.diff?cvsroot=gcc&r1=2.9943&r2=2.9944
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/tree-cfg.c.diff?cvsroot=gcc&r1=2.220&r2=2.221



-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23817

[Bug tree-optimization/23817] [4.1 Regression] ICE in check_loop_closed_ssa_use, at tree-ssa-loop-manip.c:398

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2005-09-13 13:46 -------
Fixed.

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


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23817