[Bug c++/51601] New: ice in verify_live_on_entry

[Bug c++/51601] New: ice in verify_live_on_entry

[dcb314 at hotmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51601

             Bug #: 51601
           Summary: ice in verify_live_on_entry
    Classification: Unclassified
           Product: gcc
           Version: 4.7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: dcb314@hotmail.com


Created attachment 26121
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=26121
gzipped C++ source code

I just tried to compile the package drumstick-0.5.0-1
on latest trunk dated 20111216 on an AMD x86_64 box.

The compiler said

dotLength_28 is defined  in BB6, by:
dotLength_28 = PHI <dotLength_38(5), dotLength_41(6)>

It is also live-on-entry to entry BB 2 So it appears to have multiple defs.
/home/dcb/rpmbuild/BUILD/drumstick-0.5.0/library/src/qove.cpp: In member
function 'int OVE::NoteContainer::getDuration() const':
/home/dcb/rpmbuild/BUILD/drumstick-0.5.0/library/src/qove.cpp:4580:5: internal
compiler error: in verify_live_on_entry, at tree-ssa-live.c:1444
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.

Preprocessed source code attached. Flag -O3 required.

[Bug c++/51601] ice in verify_live_on_entry

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51601

Richard Guenther <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2011-12-19
     Ever Confirmed|0                           |1

--- Comment #1 from Richard Guenther <rguenth at gcc dot gnu.org> 2011-12-19 09:27:06 UTC ---
Confirmed, reducing.

[Bug tree-optimization/51601] [4.7 Regression] ice in verify_live_on_entry

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51601

Richard Guenther <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
          Component|c++                         |tree-optimization
   Target Milestone|---                         |4.7.0
            Summary|ice in verify_live_on_entry |[4.7 Regression] ice in
                   |                            |verify_live_on_entry

--- Comment #2 from Richard Guenther <rguenth at gcc dot gnu.org> 2011-12-19 11:04:30 UTC ---
int 
getDuration(int dot_)
{
  int duration = (int) 32;
  int dotLength = duration;
  for (int i = 0; i < dot_; ++i) 
      dotLength /= 2;
  duration += dotLength;
  return duration;
}

Caused by the vectorizer.

[Bug tree-optimization/51601] [4.7 Regression] ice in verify_live_on_entry

[jakub at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51601

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
                 CC|                            |jakub at gcc dot gnu.org
         Resolution|                            |DUPLICATE

--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> 2011-12-19 11:16:11 UTC ---
Dup.

*** This bug has been marked as a duplicate of bug 51590 ***