https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90115
--- Comment #18 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by Thomas Schwinge <tschwi...@gcc.gnu.org>: https://gcc.gnu.org/g:11e811d8e2f63667f60f73731bb934273f5882b8 commit r13-3541-g11e811d8e2f63667f60f73731bb934273f5882b8 Author: Julian Brown <jul...@codesourcery.com> Date: Wed Oct 12 20:44:57 2022 +0000 OpenACC: Don't gang-privatize artificial variables [PR90115] This patch prevents compiler-generated artificial variables from being treated as privatization candidates for OpenACC. The rationale is that e.g. "gang-private" variables actually must be shared by each worker and vector spawned within a particular gang, but that sharing is not necessary for any compiler-generated variable (at least at present, but no such need is anticipated either). Variables on the stack (and machine registers) are already private per-"thread" (gang, worker and/or vector), and that's fine for artificial variables. We're restricting this to blocks, as we still need to understand what it means for a 'DECL_ARTIFICIAL' to appear in a 'private' clause. Several tests need their scan output patterns adjusted to compensate. 2022-10-14 Julian Brown <jul...@codesourcery.com> PR middle-end/90115 gcc/ * omp-low.cc (oacc_privatization_candidate_p): Artificial vars are not privatization candidates. libgomp/ * testsuite/libgomp.oacc-fortran/declare-1.f90: Adjust scan output. * testsuite/libgomp.oacc-fortran/host_data-5.F90: Likewise. * testsuite/libgomp.oacc-fortran/if-1.f90: Likewise. * testsuite/libgomp.oacc-fortran/print-1.f90: Likewise. * testsuite/libgomp.oacc-fortran/privatized-ref-2.f90: Likewise. Co-authored-by: Thomas Schwinge <tho...@codesourcery.com>
