Hi! See attached "[PR92854] Add 'libgomp.oacc-c-c++-common/pr92854-1.c'", committed to trunk in r279120, "to document the status quo", which does match my understanding of the OpenACC 2.6 semantics.
Grüße Thomas
From e14bd9d202bc4140d825a396ddaf64a5930ee3d1 Mon Sep 17 00:00:00 2001
From: tschwinge <tschwinge@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Mon, 9 Dec 2019 11:40:17 +0000
Subject: [PATCH] [PR92854] Add 'libgomp.oacc-c-c++-common/pr92854-1.c'
... to document the status quo.
libgomp/
PR libgomp/92854
* testsuite/libgomp.oacc-c-c++-common/pr92854-1.c: New file.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@279120 138bc75d-0d04-0410-961f-82ee72b054a4
---
libgomp/ChangeLog | 3 ++
.../libgomp.oacc-c-c++-common/pr92854-1.c | 31 +++++++++++++++++++
2 files changed, 34 insertions(+)
create mode 100644 libgomp/testsuite/libgomp.oacc-c-c++-common/pr92854-1.c
diff --git a/libgomp/ChangeLog b/libgomp/ChangeLog
index 6ef2f24e4d5..aac3b1887b0 100644
--- a/libgomp/ChangeLog
+++ b/libgomp/ChangeLog
@@ -1,5 +1,8 @@
2019-12-09 Thomas Schwinge <tho...@codesourcery.com>
+ PR libgomp/92854
+ * testsuite/libgomp.oacc-c-c++-common/pr92854-1.c: New file.
+
* testsuite/libgomp.oacc-c-c++-common/host_data-6.c: New file.
* target.c (gomp_exit_data): Use 'gomp_remove_var'.
diff --git a/libgomp/testsuite/libgomp.oacc-c-c++-common/pr92854-1.c b/libgomp/testsuite/libgomp.oacc-c-c++-common/pr92854-1.c
new file mode 100644
index 00000000000..6ba96b6bf8f
--- /dev/null
+++ b/libgomp/testsuite/libgomp.oacc-c-c++-common/pr92854-1.c
@@ -0,0 +1,31 @@
+/* Verify that 'acc_unmap_data' unmaps even in presence of dynamic reference
+ counts. */
+
+/* { dg-skip-if "" { *-*-* } { "*" } { "-DACC_MEM_SHARED=0" } } */
+
+#include <assert.h>
+#include <stdlib.h>
+#include <openacc.h>
+
+int
+main ()
+{
+ const int N = 180;
+
+ char *h = (char *) malloc (N);
+ char *d = (char *) acc_malloc (N);
+ if (!d)
+ abort ();
+ acc_map_data (h, d, N);
+
+ char *d_ = (char *) acc_create (h + 3, N - 77);
+ assert (d_ == d + 3);
+
+ d_ = (char *) acc_create (h, N);
+ assert (d_ == d);
+
+ acc_unmap_data (h);
+ assert (!acc_is_present (h, N));
+
+ return 0;
+}
--
2.17.1
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