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


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

--- Comment #5 from David Kredba <nheghathivhistha at gmail dot com> ---
(In reply to Jakub Jelinek from comment #4)
> 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.

Thank you, opened as PR69001.

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