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From: "burnus at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/113867] [14 Regression][OpenMP] Wrong code with
 mapping pointers in structs
Date: Sat, 10 Feb 2024 18:07:42 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D113867

--- Comment #1 from Tobias Burnus <burnus at gcc dot gnu.org> ---
Created attachment 57382
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=3D57382&action=3Dedit
Fortran testcase, kind of, as pointer + pointee mapping cannot be split
(working)

For completeness, a Fortran testcase.
(This Testcase works on GCC 13 and mainline.)

As in Fortran, 'map(ptr, dt%ptr)' will always attempt to map the pointer and
the pointer, it is not possible to split
   map(s2.p[:N])  // map the pointee
   map(s2.p, s2.p[:0]) // map the pointer and try pointer attachment
as in C/C++. And using 'map(s.p)' will prevent a later inner 'map(s.a,...)'=
 as
's' is already partially mapped. Hence, the aux 'ptr' is used, but that kin=
d of
defeats the purpose of this testcase.=