[lno] internal compiler error: in record_dependences_for_modify_expr, at tree-scalar-evolution.c:3236

[Richard Guenther]

Hi!

With todays CVS I get the following ICE with the tramp3d-v2 testcase at
http://www.tat.physik.uni-tuebingen.de/~rguenth/gcc/tramp3d-v2.cpp.gz

~/ix86/gccssa-lno/bin/g++ -o tramp3d-v2 tramp3d-v2.cpp -O2 -msse2 
-ftree-vectorize
tramp3d-v2.cpp: In member function `void RelationList::setDirty() const':
tramp3d-v2.cpp:47400: internal compiler error: in 
record_dependences_for_modify_expr, at tree-scalar-evolution.c:3236
Please submit a full bug report,
with preprocessed source if appropriate.
See <URL:http://gcc.gnu.org/bugs.html> for instructions.

trying to debug this with gdb, my gdb version (5.3) segfaults at setting 
the breakpoint to the above location.  So you have to dig for your own - 
but maybe TREE_CODE_LENGTH (TREE_CODE (rhs)) is ... 3? (dunno, function 
call, I assume).

The code failing looks actually like

struct RelationList {
   void setDirty() const
     {
       for (int i = 0; i < list_m->size(); ++i)
         list_m->elem(i)->setDirty();
     }
private:
   RefCountedPtr<RelationListData> list_m;
};

where ->elem() returns an element of std::vector<RelationListItem *>.

Richard.