[Bug tree-optimization/68761] -floop-interchange internal compiler error: in create_tmp_var, at gimple-expr.c:519

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68761

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

           What    |Removed                     |Added
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                 CC|                            |jakub at gcc dot gnu.org

--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Please report that into a separate PR, this one is graphite related, your is
some C++17 C++ FE bug.  What is going on is that cp_genericize_r first converts
changes a by-reference RESULT_DECL into INDIRECT_REF of it, and then (dunno if
because of tree sharing or some constexpr stuff) at some point that IL is
passed again to cp_genericize_r again and again performs the same change, so we
in the end have two nested INDIRECT_REFs and the types don't match any longer.