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From: "burnus at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/95654] nvptx offloading: FAIL:
 libgomp.fortran/pr66199-5.f90   -O3 -fomit-frame-pointer -funroll-loops
 -fpeel-loops -ftracer -finline-functions  execution test
Date: Tue, 15 Sep 2020 23:29:57 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D95654

--- Comment #3 from Tobias Burnus <burnus at gcc dot gnu.org> ---
Created attachment 49222
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=3D49222&action=3Dedit
Slightly reduced example, compile with gfortran -fopenmp -O1 -ftracer

Some testing; with gfortran -fopenmp -O1 -ftracer it shows something like:
         -31 =3D?=3D 64
The expected output is the last value of the loop iteration ("lastprivate"),
i.e. (b-1+1)*2 =3D 32*2 =3D 64. =E2=80=93 When running the target section o=
n the host
(-foffload=3Ddisable) it works, which indicates either a shared-memory vs.
non-shared issue or an nvptx problem.

At a glance, the original dump looks fine; it seems as if either the
  .omp_data_i_28(D)->d1 =3D d1_9;
  .omp_data_i_28(D)->d2 =3D d2_11;
is not executed or the PHI handling goes wrong.=