[PR92726, PR92970, PR92984] [OpenACC] Clarify 'acc_delete' etc. for 'NULL'-in, non-present data, or size zero PR92970 "OpenACC 2.5: 'acc_delete' etc. on non-present data is a no-op" is an actual bug fix, and the other ones are fall-out, currently undefined behavior. libgomp/ PR libgomp/92726 PR libgomp/92970 PR libgomp/92984 * oacc-mem.c (delete_copyout): No-op behavior if 'lookup_host' fails. (GOACC_enter_exit_data): Simplify accordingly. * testsuite/libgomp.oacc-c-c++-common/pr92970-1.c: New file, subsuming... * testsuite/libgomp.oacc-c-c++-common/lib-17.c: ... this file... * testsuite/libgomp.oacc-c-c++-common/lib-18.c: ..., and this file. * testsuite/libgomp.oacc-c-c++-common/pr92984-1.c: New file, subsuming... * testsuite/libgomp.oacc-c-c++-common/lib-21.c: ... this file... * testsuite/libgomp.oacc-c-c++-common/lib-29.c: ..., and this file. * testsuite/libgomp.oacc-c-c++-common/pr92726-1.c: New file, subsuming... * testsuite/libgomp.oacc-c-c++-common/lib-28.c: ... this file. From-SVN: r279532
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