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From: "jamborm at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug ipa/102310] [11/12 Regression] ICE in
 visit_ref_for_mod_analysis with OpenACC
Date: Fri, 08 Oct 2021 09:07:22 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D102310

Martin Jambor <jamborm at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |jamborm at gcc dot gnu.org

--- Comment #6 from Martin Jambor <jamborm at gcc dot gnu.org> ---
Both the ICE in visit_ref_for_mod_analysis and the ICE in
expand_expr_real_1 happen when there the IL includes a PARM_DECL of a
different function.  So I suspect that OpenACC outlining or something
carried over a PARM_DECL from one function to another, forgetting to
properly copy it.

In my experience, using dumps with UIDs (i.g. with
-fdump-tree-all-uid) helps tremendously when debugging these.=