[Bug middle-end/59176] [4.9 Regression] ICE edge points to wrong declaration / verify_cgraph_node failed

[hubicka at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59176

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |ASSIGNED
           Assignee|hubicka at gcc dot gnu.org         |mjambor at suse dot cz

--- Comment #8 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
This seems to be bug in ipa-cp, it redirect edge from thunk to clone of the
function thunk is associated with.
Old value = (cgraph_node *) 0x7ffff6c5fb88
New value = (cgraph_node *) 0x7ffff6c5f668
cgraph_set_edge_callee (e=0x7ffff6c76d68, n=0x7ffff6c5f668) at
../../gcc/cgraph.c:1081

(gdb) p dump_cgraph_node (stderr, (cgraph_node *)0x7ffff6c5fb88)
_ZN1BD1Ev/5 (B::~B()) @0x7ffff6c5fb88
  Type: function definition analyzed alias cpp_implicit_alias
  Visibility: external public weak comdat_group:_ZN1BD5Ev one_only
  Address is taken.
  Aux: @0x1d026e0  References: _ZN1BD2Ev/4 (alias)
  Referring: _ZTV1B/13 (addr)
  Availability: available
  First run: 0
  Function flags:
  Called by: _ZN1BD0Ev/6 (1.00 per call) (can throw external) 
  Calls: 
$24 = void
(gdb) p dump_cgraph_node (stderr, (cgraph_node *)0x7ffff6c5f668)
_ZN1BD2Ev.constprop.0/35 (<built-in>) @0x7ffff6c5f668
  Type: function definition analyzed
  Visibility: external public weak comdat_group:_ZN1BD5Ev one_only
  References: 
  Referring: 
  Availability: local
  First run: 0
  Function flags: local
  Called by: _ZN1C5m_fn3Ev/8 _ZN1C5m_fn3Ev/8 (1.00 per call) (can throw
external) _ZN1C5m_fn1Ev/7 _ZN1C5m_fn1Ev/7 (1.00 per call) (can throw external) 
  Calls: 

I believe it is bug somewhere in logic skipping thunks.  Martin, this is
probably yours.