[Bug target/43801] New: [4.5/4.6 Regression] error: function causes a section type conflict with -fipa-cp -fipa-cp-clone

[Bug target/43801] New: [4.5/4.6 Regression] error: function causes a section type conflict with -fipa-cp -fipa-cp-clone

[zsojka at seznam dot cz]

Command line:
g++ -fipa-cp -fipa-cp-clone testcase.C

Tested revisions:
r158486 - fail
r153685 - fail
4.4 r158133 - OK

Compiler output:
$ g++ -fipa-cp -fipa-cp-clone -c testcase.C
testcase.C: In member function 'virtual void B::_ZN1B1fEi.clone.0()':
testcase.C:5:16: error: virtual void B::_ZN1B1fEi.clone.0() causes a section
type conflict
testcase.C:5:16: error: virtual void B::_ZN1B1fEi.clone.0() causes a section
type conflict


-- 
           Summary: [4.5/4.6 Regression] error: function causes a section
                    type conflict with -fipa-cp -fipa-cp-clone
           Product: gcc
           Version: 4.6.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: zsojka at seznam dot cz
  GCC host triplet: x86_64-pc-linux-gnu
GCC target triplet: x86_64-pc-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43801

[Bug target/43801] [4.5/4.6 Regression] error: function causes a section type conflict with -fipa-cp -fipa-cp-clone

[zsojka at seznam dot cz]

------- Comment #1 from zsojka at seznam dot cz  2010-04-19 15:44 -------
Created an attachment (id=20420)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=20420&action=view)
reduced testcase (from g++.old-deja/g++.mike/p3708.C)

Command line:
g++ -fipa-cp -fipa-cp-clone pr43801.C


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43801

[Bug target/43801] [4.5/4.6 Regression] error: function causes a section type conflict with -fipa-cp -fipa-cp-clone

[rguenth at gcc dot gnu dot org]

------- Comment #2 from rguenth at gcc dot gnu dot org  2010-04-19 16:02 -------
Another -O0 -fipa-* bug.


-- 

rguenth at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |hubicka at gcc dot gnu dot
                   |                            |org
   Target Milestone|---                         |4.5.1


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43801

[Bug tree-optimization/43801] [4.5/4.6 Regression] error: function causes a section type conflict with -fipa-cp -fipa-cp-clone

[pinskia at gcc dot gnu dot org]

------- Comment #3 from pinskia at gcc dot gnu dot org  2010-04-20 03:07 -------
Confirmed.


-- 

pinskia at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Severity|normal                      |major
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|0                           |1
           Keywords|                            |rejects-valid
   Last reconfirmed|0000-00-00 00:00:00         |2010-04-20 03:07:02
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43801

[Bug tree-optimization/43801] [4.5/4.6 Regression] error: function causes a section type conflict with -fipa-cp -fipa-cp-clone

[pinskia at gcc dot gnu dot org]

------- Comment #4 from pinskia at gcc dot gnu dot org  2010-04-20 03:08 -------
(In reply to comment #2)
> Another -O0 -fipa-* bug.

Actually it also fails with "-fipa-cp -fipa-cp-clone -O2 -fno-inline" so this
is not just a -O0 issue but something going funny with the ipa-cp cloner.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43801

[Bug tree-optimization/43801] [4.5/4.6 Regression] error: function causes a section type conflict with -fipa-cp -fipa-cp-clone

[rguenth at gcc dot gnu dot org]

------- Comment #5 from rguenth at gcc dot gnu dot org  2010-05-19 12:32 -------
Re-confirmed.  Honza - you fixed sth like that for LTO, can you look at this
please?


-- 

rguenth at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Priority|P3                          |P2
   Last reconfirmed|2010-04-20 03:07:02         |2010-05-19 12:32:42
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43801

[Bug tree-optimization/43801] [4.5/4.6 Regression] error: function causes a section type conflict with -fipa-cp -fipa-cp-clone

[jakub at gcc dot gnu dot org]

------- Comment #6 from jakub at gcc dot gnu dot org  2010-06-29 16:27 -------
Created an attachment (id=21040)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=21040&action=view)
gcc46-pr43801.patch

Untested fix.

I think for !DECL_ONE_ONLY decls we can put the virtual clone in the same
section, but for comdat groups we obviously can't do that.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43801

[Bug tree-optimization/43801] [4.5/4.6 Regression] error: function causes a section type conflict with -fipa-cp -fipa-cp-clone

[jakub at gcc dot gnu dot org]

------- Comment #7 from jakub at gcc dot gnu dot org  2010-06-29 19:46 -------
Subject: Bug 43801

Author: jakub
Date: Tue Jun 29 19:46:05 2010
New Revision: 161564

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=161564
Log:
        PR tree-optimization/43801
        * cgraph.c (cgraph_create_virtual_clone): Clear DECL_SECTION_NAME
        if old_decl was DECL_ONE_ONLY.

        * g++.dg/torture/pr43801.C: New test.

Added:
    trunk/gcc/testsuite/g++.dg/torture/pr43801.C
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/cgraph.c
    trunk/gcc/testsuite/ChangeLog


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43801

[Bug tree-optimization/43801] [4.5/4.6 Regression] error: function causes a section type conflict with -fipa-cp -fipa-cp-clone

[jakub at gcc dot gnu dot org]

------- Comment #8 from jakub at gcc dot gnu dot org  2010-07-01 11:03 -------
Subject: Bug 43801

Author: jakub
Date: Thu Jul  1 11:03:31 2010
New Revision: 161661

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=161661
Log:
        Backport from mainline
        2010-06-29  Jakub Jelinek  <jakub@redhat.com>

        PR tree-optimization/43801
        * cgraph.c (cgraph_create_virtual_clone): Clear DECL_SECTION_NAME
        if old_decl was DECL_ONE_ONLY.

        * g++.dg/torture/pr43801.C: New test.

Added:
    branches/gcc-4_5-branch/gcc/testsuite/g++.dg/torture/pr43801.C
Modified:
    branches/gcc-4_5-branch/gcc/ChangeLog
    branches/gcc-4_5-branch/gcc/cgraph.c
    branches/gcc-4_5-branch/gcc/testsuite/ChangeLog


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43801

[Bug tree-optimization/43801] [4.5/4.6 Regression] error: function causes a section type conflict with -fipa-cp -fipa-cp-clone

[jakub at gcc dot gnu dot org]

------- Comment #9 from jakub at gcc dot gnu dot org  2010-07-01 11:07 -------
Fixed.


-- 

jakub at gcc dot gnu dot org changed:

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


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43801