https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112307
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
See Also| |https://gcc.gnu.org/bugzill
| |a/show_bug.cgi?id=109945
--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
The transform in main is because we do
Value numbering stmt = _22 = &MEM <struct EnumeratorRange> [(void
*)&intersections + 1B] == _34;
Applying pattern match.pd:6940, gimple-match-5.cc:1815
Match-and-simplified &MEM <struct EnumeratorRange> [(void *)&intersections +
1B] == _34 to 0
RHS &MEM <struct EnumeratorRange> [(void *)&intersections + 1B] == _34
simplified to 0
Setting value number of _22 to 0 (changed)
Value numbering stmt = intersections.end_reached_ = _22;
No store match
Value numbering store intersections.end_reached_ to 0
Setting value number of .MEM_93 to .MEM_93 (changed)
Value numbering stmt = if (&MEM <struct EnumeratorRange> [(void
*)&intersections + 1B] == _34)
marking known outgoing edge 12 -> 15 executable
and that's using
/* Simplify pointer equality compares using PTA. */
(for neeq (ne eq)
(simplify
(neeq @0 @1)
(if (POINTER_TYPE_P (TREE_TYPE (@0))
&& ptrs_compare_unequal (@0, @1))
{ constant_boolean_node (neeq != EQ_EXPR, type); })))
which makes it really a similar issue as PR109945 - _34 points to
nonlocal/escaped but 'intersections' isn't part of that set though it
probably "escapes" at
<bb 2> [local count: 118111600]:
intersections = CompositeMesh::Intersections (&mesh); [return slot
optimization]
-fno-tree-pta is a (quite heavy) workaround.
