[Bug c/43842] New: ice in vect_create_epilog_for_reduction

[Bug c/43842] New: ice in vect_create_epilog_for_reduction

[regehr at cs dot utah dot edu]

[regehr@gamow tmp407]$ current-gcc -c -O3 small.c
small.c: In function 'int161':
small.c:19:1: internal compiler error: in vect_create_epilog_for_reduction, at
tree-vect-loop.c:3451
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.

[regehr@gamow tmp407]$ current-gcc -v

Using built-in specs.
COLLECT_GCC=current-gcc
COLLECT_LTO_WRAPPER=/uusoc/exports/scratch/regehr/z/compiler-install/gcc-r158618-install/bin/../libexec/gcc/x86_64-unknown-linux-gnu/4.6.0/lto-wrapper
Target: x86_64-unknown-linux-gnu
Configured with: ../configure --with-libelf=/usr/local --enable-lto
--prefix=/home/regehr/z/compiler-install/gcc-r158618-install
--program-prefix=r158618- --enable-languages=c,c++
Thread model: posix
gcc version 4.6.0 20100421 (experimental) (GCC) 

[regehr@gamow tmp407]$ cat small.c

typedef short int int16_t;
typedef int int32_t;
typedef unsigned short int uint16_t;
typedef unsigned int uint32_t;
static int16_t
safe_rshift_func_int16_t_s_u (int16_t left, unsigned int right)
{
  return left || right >= 1 * 8 ? left : left >> right;
}

static uint32_t
safe_add_func_uint32_t_u_u (uint32_t ui1, uint16_t ui2)
{
  return ui1 + ui2;
}

int16_t g_4;
uint32_t g_9[1];
int161 (void)
{
  int32_t l_2;
  for (l_2 = -25; l_2; l_2 = safe_add_func_uint32_t_u_u (l_2, 1))
    g_9[0] ^= safe_rshift_func_int16_t_s_u (g_4, 1);
  return 0;
}


-- 
           Summary: ice in vect_create_epilog_for_reduction
           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: x86_64-unknown-linux-gnu
  GCC host triplet: x86_64-unknown-linux-gnu
GCC target triplet: x86_64-unknown-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43842

[Bug tree-optimization/43842] [4.6 Regression] ice in vect_create_epilog_for_reduction

[rguenth at gcc dot gnu dot org]

------- Comment #1 from rguenth at gcc dot gnu dot org  2010-04-22 08:51 -------
Confirmed.


-- 

rguenth at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |irar at gcc dot gnu dot org,
                   |                            |rguenth at gcc dot gnu dot
                   |                            |org
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|0                           |1
      Known to work|                            |4.5.0
   Last reconfirmed|0000-00-00 00:00:00         |2010-04-22 08:51:50
               date|                            |
            Summary|ice in                      |[4.6 Regression] ice in
                   |vect_create_epilog_for_reduc|vect_create_epilog_for_reduc
                   |tion                        |tion
   Target Milestone|---                         |4.6.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43842

[Bug tree-optimization/43842] [4.6 Regression] ice in vect_create_epilog_for_reduction

[irar at il dot ibm dot com]

-- 

irar at il dot ibm dot com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|unassigned at gcc dot gnu   |irar at il dot ibm dot com
                   |dot org                     |
             Status|NEW                         |ASSIGNED
   Last reconfirmed|2010-04-22 08:51:50         |2010-04-22 11:46:44
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43842

[Bug tree-optimization/43842] [4.6 Regression] ice in vect_create_epilog_for_reduction

[hjl dot tools at gmail dot com]

------- Comment #2 from hjl dot tools at gmail dot com  2010-04-22 15:38 -------
It is caused by revision 158506:

http://gcc.gnu.org/ml/gcc-cvs/2010-04/msg00612.html


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43842

[Bug tree-optimization/43842] [4.6 Regression] ice in vect_create_epilog_for_reduction

[hjl dot tools at gmail dot com]

------- Comment #3 from hjl dot tools at gmail dot com  2010-04-22 18:07 -------
I think revision 158650:

http://gcc.gnu.org/ml/gcc-cvs/2010-04/msg00756.html

is the fix for this bug.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43842

[Bug tree-optimization/43842] [4.6 Regression] ice in vect_create_epilog_for_reduction

[irar at gcc dot gnu dot org]

------- Comment #4 from irar at gcc dot gnu dot org  2010-04-22 18:23 -------
Subject: Bug 43842

Author: irar
Revision: 158650
Modified property: svn:log

Modified: svn:log at Thu Apr 22 18:22:54 2010
------------------------------------------------------------------------------
--- svn:log (original)
+++ svn:log Thu Apr 22 18:22:54 2010
@@ -1,5 +1,5 @@

-       PR tree-optimization/43482
+       PR tree-optimization/43842
        * tree-vect-loop.c (vect_create_epilog_for_reduction): Handle 
        loop unrolling in update of exit phis. Fix comment.
        * tree-vect-slp.c (vect_analyze_slp): Check that there are at


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43842

[Bug tree-optimization/43842] [4.6 Regression] ice in vect_create_epilog_for_reduction

[rguenth at gcc dot gnu dot org]

------- Comment #5 from rguenth at gcc dot gnu dot org  2010-07-23 11:48 -------
Fixed.


-- 

rguenth at gcc dot gnu dot org changed:

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


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43842