[Bug tree-optimization/29902] New: [4.2/4.3 Regression] ICE in coalesce_abnormal_edges, at tree-outof-ssa.c:644

[Bug tree-optimization/29902] New: [4.2/4.3 Regression] ICE in coalesce_abnormal_edges, at tree-outof-ssa.c:644

[tbm at cyrius dot com]

I get the following ICE with 4.2.0 20061116 with -fprefetch-loop-arrays:

tbm@coconut0:~$ /usr/lib/gcc-snapshot/bin/g++ -c -O3
libjingle0.3-xmppclient.cpp                      tbm@coconut0:~$
/usr/lib/gcc-snapshot/bin/g++ -c -O -fprefetch-loop-arrays
libjingle0.3-xmppclient.cpp
libjingle0.3-xmppclient.cpp: In member function 'virtual buzz::SaslMechanism*
buzz::PlainSaslHandler::CreateSaslMechanism(const std::string&)':
libjingle0.3-xmppclient.cpp:231: internal compiler error: in
coalesce_abnormal_edges, at tree-outof-ssa.c:644
Please submit a full bug report,
with preprocessed source if appropriate.
See <URL:http://gcc.gnu.org/bugs.html> for instructions.
tbm@coconut0:~$


-- 
           Summary: [4.2/4.3 Regression] ICE in coalesce_abnormal_edges, at
                    tree-outof-ssa.c:644
           Product: gcc
           Version: 4.2.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: tree-optimization
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: tbm at cyrius dot com


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29902

[Bug tree-optimization/29902] [4.2/4.3 Regression] ICE in coalesce_abnormal_edges, at tree-outof-ssa.c:644

[tbm at cyrius dot com]

------- Comment #1 from tbm at cyrius dot com  2006-11-19 22:31 -------
Created an attachment (id=12648)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=12648&action=view)
testcase


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29902

[Bug tree-optimization/29902] [4.2/4.3 Regression] ICE in coalesce_abnormal_edges, at tree-outof-ssa.c:644

[pinskia at gcc dot gnu dot org]

-- 

pinskia at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |ice-on-valid-code
   Target Milestone|---                         |4.2.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29902

[Bug tree-optimization/29902] [4.2/4.3 Regression] ICE in coalesce_abnormal_edges, at tree-outof-ssa.c:644

[pinskia at gcc dot gnu dot org]

------- Comment #2 from pinskia at gcc dot gnu dot org  2006-11-20 00:23 -------
Reduced testcase:
int length1();
int g(int);
void f(int capacity_, char *old_storage)
{
  try {
    length1();
    int old_capacity = capacity_;
    capacity_ *= 2;
    g(capacity_);
    for (int i = 1; i < old_capacity; i++)
     old_storage[i] = old_storage[i - 1];
  } catch (...) {
    for (int i = 1; i < capacity_; i++){}
  }
}


-- 

pinskia at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |rakdver at gcc dot gnu dot
                   |                            |org
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|0                           |1
   Last reconfirmed|0000-00-00 00:00:00         |2006-11-20 00:23:35
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29902

[Bug tree-optimization/29902] [4.2/4.3 Regression] ICE in coalesce_abnormal_edges, at tree-outof-ssa.c:644

[pinskia at gcc dot gnu dot org]

------- Comment #3 from pinskia at gcc dot gnu dot org  2006-11-20 00:27 -------
I think after remove empty loops, we should add a DCE pass which should fix the
above reduced testcase but will not fix this reduced testcase:
int length1();
int g(int);
void f(int capacity_, char*old_storage)
{
  try {
    length1();
    int old_capacity = capacity_;
    capacity_ *= 2;
    g(capacity_);
    for (int i = 1; i < old_capacity; i++)
     old_storage[i] = old_storage[i - 1];
  } catch (...) {
    for (int i = 1; i < capacity_; i++){old_storage[i] = 0;}
  }
}


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29902

[Bug tree-optimization/29902] [4.2/4.3 Regression] ICE in coalesce_abnormal_edges, at tree-outof-ssa.c:644

[rakdver at gcc dot gnu dot org]

-- 

rakdver at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|unassigned at gcc dot gnu   |rakdver at gcc dot gnu dot
                   |dot org                     |org
             Status|NEW                         |ASSIGNED
   Last reconfirmed|2006-11-20 00:23:35         |2006-11-20 01:01:32
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29902

[Bug tree-optimization/29902] [4.2/4.3 Regression] ICE in coalesce_abnormal_edges, at tree-outof-ssa.c:644

[rakdver at gcc dot gnu dot org]

------- Comment #4 from rakdver at gcc dot gnu dot org  2006-11-20 01:39 -------
On what target is this? I cannot reproduce it neither on i686 nor from ppc
crosscompiler.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29902

[Bug tree-optimization/29902] [4.2/4.3 Regression] ICE in coalesce_abnormal_edges, at tree-outof-ssa.c:644

[pinskia at gcc dot gnu dot org]

------- Comment #5 from pinskia at gcc dot gnu dot org  2006-11-20 01:41 -------
I could reproduce this with -march=pentium4 -fprefetch-loop-arrays with "4.3.0
20061111" for 4.2.0, you might need --enable-checking.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29902

[Bug tree-optimization/29902] [4.2/4.3 Regression] ICE in coalesce_abnormal_edges, at tree-outof-ssa.c:644

[tbm at cyrius dot com]

------- Comment #6 from tbm at cyrius dot com  2006-11-20 09:25 -------
(In reply to comment #4)
> On what target is this? I cannot reproduce it neither on i686 nor from ppc
> crosscompiler.

I was on ia64.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29902

[Bug tree-optimization/29902] [4.2/4.3 Regression] ICE in coalesce_abnormal_edges, at tree-outof-ssa.c:644

[rakdver at gcc dot gnu dot org]

------- Comment #7 from rakdver at gcc dot gnu dot org  2006-11-21 23:45 -------
Subject: Bug 29902

Author: rakdver
Date: Tue Nov 21 23:45:21 2006
New Revision: 119074

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=119074
Log:
        PR tree-optimization/29902
        * tree-ssa-loop-manip.c (can_unroll_loop_p): Return false if
        any involved ssa name appears in abnormal phi node.

        * g++.dg/tree-ssa/pr29902.C: New test.


Added:
    trunk/gcc/testsuite/g++.dg/tree-ssa/pr29902.C
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-ssa-loop-manip.c


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29902

[Bug tree-optimization/29902] [4.2 Regression] ICE in coalesce_abnormal_edges, at tree-outof-ssa.c:644

[pinskia at gcc dot gnu dot org]

------- Comment #8 from pinskia at gcc dot gnu dot org  2006-11-24 02:23 -------
Fixed on the trunk.


-- 

pinskia at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|[4.2/4.3 Regression] ICE in |[4.2 Regression] ICE in
                   |coalesce_abnormal_edges, at |coalesce_abnormal_edges, at
                   |tree-outof-ssa.c:644        |tree-outof-ssa.c:644


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29902

[Bug tree-optimization/29902] [4.2 Regression] ICE in coalesce_abnormal_edges, at tree-outof-ssa.c:644

[mmitchel at gcc dot gnu dot org]

-- 

mmitchel at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Priority|P3                          |P1


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29902

[Bug tree-optimization/29902] [4.2 Regression] ICE in coalesce_abnormal_edges, at tree-outof-ssa.c:644

[mmitchel at gcc dot gnu dot org]

------- Comment #9 from mmitchel at gcc dot gnu dot org  2007-02-19 20:43 -------
Zdenek --

Can this patch be backported to 4.2?

Thanks,

-- Mark


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29902

[Bug tree-optimization/29902] [4.2 Regression] ICE in coalesce_abnormal_edges, at tree-outof-ssa.c:644

[rakdver at gcc dot gnu dot org]

------- Comment #10 from rakdver at gcc dot gnu dot org  2007-03-03 00:39 -------
Subject: Bug 29902

Author: rakdver
Date: Sat Mar  3 00:38:56 2007
New Revision: 122501

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=122501
Log:
        PR tree-optimization/29902
        * tree-ssa-loop-manip.c (can_unroll_loop_p): Return false if
        any involved ssa name appears in abnormal phi node.

        * g++.dg/tree-ssa/pr29902.C: New test.


Added:
    branches/gcc-4_2-branch/gcc/testsuite/g++.dg/tree-ssa/pr29902.C
Modified:
    branches/gcc-4_2-branch/gcc/ChangeLog
    branches/gcc-4_2-branch/gcc/testsuite/ChangeLog
    branches/gcc-4_2-branch/gcc/tree-ssa-loop-manip.c


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29902

[Bug tree-optimization/29902] [4.2 Regression] ICE in coalesce_abnormal_edges, at tree-outof-ssa.c:644

[rakdver at gcc dot gnu dot org]

------- Comment #11 from rakdver at gcc dot gnu dot org  2007-03-03 00:41 -------
> Can this patch be backported to 4.2?

Done.


-- 

rakdver at gcc dot gnu dot org changed:

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


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29902