[Bug tree-optimization/55927] New: FAIL: g++.dg/ipa/devirt-10.C -std=gnu++11 scan-ipa-dump-times inline "Discovered a virtual call to a known target" 1

[Bug tree-optimization/55927] New: FAIL: g++.dg/ipa/devirt-10.C -std=gnu++11 scan-ipa-dump-times inline "Discovered a virtual call to a known target" 1

[schwab@linux-m68k.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55927

             Bug #: 55927
           Summary: FAIL: g++.dg/ipa/devirt-10.C -std=gnu++11
                    scan-ipa-dump-times inline "Discovered a virtual call
                    to a known target" 1
    Classification: Unclassified
           Product: gcc
           Version: 4.8.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: tree-optimization
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: schwab@linux-m68k.org
            Target: ia64-*-*


Created attachment 29136
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=29136
devirt-10.C.048i.inline

$ grep -c "Discovered a virtual call to a known target" devirt-10.C.048i.inline
0

Re: [Bug tree-optimization/55927] New: FAIL: g++.dg/ipa/devirt-10.C -std=gnu++11 scan-ipa-dump-times inline "Discovered a virtual call to a known target" 1

[Jan Hubicka]

This will be usual difference of virtual call representation in ia64.  The .cp test is going fine?
Honza

[Bug tree-optimization/55927] FAIL: g++.dg/ipa/devirt-10.C -std=gnu++11 scan-ipa-dump-times inline "Discovered a virtual call to a known target" 1

[hubicka at ucw dot cz]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55927

--- Comment #1 from Jan Hubicka <hubicka at ucw dot cz> 2013-01-10 14:33:48 UTC ---
This will be usual difference of virtual call representation in ia64.  The .cp
test is going fine?
Honza

[Bug tree-optimization/55927] FAIL: g++.dg/ipa/devirt-10.C -std=gnu++11 scan-ipa-dump-times inline "Discovered a virtual call to a known target" 1

[schwab@linux-m68k.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55927

--- Comment #2 from Andreas Schwab <schwab@linux-m68k.org> 2013-01-10 14:44:20 UTC ---
Yes, it does.

[Bug tree-optimization/55927] FAIL: g++.dg/ipa/devirt-10.C -std=gnu++11 scan-ipa-dump-times inline "Discovered a virtual call to a known target" 1

[hubicka at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55927

Jan Hubicka <hubicka at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |hubicka at gcc dot gnu.org

--- Comment #3 from Jan Hubicka <hubicka at gcc dot gnu.org> 2013-01-10 16:42:46 UTC ---
Martin,
I guess it is "yours" then. Why we fail to analyze one call but suceed with the
another?

[Bug tree-optimization/55927] FAIL: g++.dg/ipa/devirt-10.C -std=gnu++11 scan-ipa-dump-times inline "Discovered a virtual call to a known target" 1

[jamborm at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55927

Martin Jambor <jamborm at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |jamborm at gcc dot gnu.org

--- Comment #4 from Martin Jambor <jamborm at gcc dot gnu.org> 2013-01-10 17:49:32 UTC ---
(In reply to comment #3)
> Martin,
> I guess it is "yours" then. Why we fail to analyze one call but suceed with the
> another?

I have not looked at this ia64 bug specifically yet, but does my comment #1 in
PR 55913 answer your question?

[Bug tree-optimization/55927] FAIL: g++.dg/ipa/devirt-10.C -std=gnu++11 scan-ipa-dump-times inline "Discovered a virtual call to a known target" 1

[jamborm at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55927

Martin Jambor <jamborm at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|unassigned at gcc dot       |jamborm at gcc dot gnu.org
                   |gnu.org                     |

--- Comment #5 from Martin Jambor <jamborm at gcc dot gnu.org> 2013-01-23 17:55:49 UTC ---
Uh oh, the testcase checks behavior of indirect inlining but does not
turn off early inlining so the input to IPA-CP and inliner differs on
platforms (and will potentially change everywhere in future) and this
of course leads to different behavior.  I will double check that we do
not still loose an indirect inlining opportunity somehow and will try
to somehow force the early inliner to do the same thing on the
testcase everywhere, if possible.

[Bug tree-optimization/55927] FAIL: g++.dg/ipa/devirt-10.C -std=gnu++11 scan-ipa-dump-times inline "Discovered a virtual call to a known target" 1

[jamborm at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55927

Martin Jambor <jamborm at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |ASSIGNED
                URL|                            |http://gcc.gnu.org/ml/gcc-p
                   |                            |atches/2013-01/msg01191.htm
                   |                            |l
   Last reconfirmed|                            |2013-01-24
     Ever Confirmed|0                           |1

--- Comment #6 from Martin Jambor <jamborm at gcc dot gnu.org> 2013-01-24 16:10:37 UTC ---
It turns out that just disabling early inlining is enough and does not
make the testcase fail anywhere I tried (x86_64, ia64 and i686).  So I
posted a patch disabling it in the testcase and will commit it
shortly: http://gcc.gnu.org/ml/gcc-patches/2013-01/msg01191.html

It is true that indirect inlining on ia64 produces purely
intra-procedural opportunities for type-based devirtualization which
we do not do but should.  That is a different problem though, let's
hope it will be done in 4.9.

[Bug tree-optimization/55927] FAIL: g++.dg/ipa/devirt-10.C -std=gnu++11 scan-ipa-dump-times inline "Discovered a virtual call to a known target" 1

[jamborm at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55927

--- Comment #7 from Martin Jambor <jamborm at gcc dot gnu.org> 2013-01-24 16:18:35 UTC ---
Author: jamborm
Date: Thu Jan 24 16:18:26 2013
New Revision: 195430

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=195430
Log:
2013-01-24  Martin Jambor  <mjambor@suse.cz>

    PR tree-optimization/55927
    * g++.dg/ipa/devirt-10.C: Disable early inlining.


Modified:
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/testsuite/g++.dg/ipa/devirt-10.C

[Bug tree-optimization/55927] FAIL: g++.dg/ipa/devirt-10.C -std=gnu++11 scan-ipa-dump-times inline "Discovered a virtual call to a known target" 1

[jamborm at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55927

Martin Jambor <jamborm at gcc dot gnu.org> changed:

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

--- Comment #8 from Martin Jambor <jamborm at gcc dot gnu.org> 2013-01-24 16:31:33 UTC ---
Fixed.