Fix templatized C++ OpenACC 'cache' directive ICEs

This has been broken forever, whoops...

	gcc/cp/
	* pt.c (tsubst_omp_clauses): Handle 'OMP_CLAUSE__CACHE_'.
	(tsubst_expr): Handle 'OACC_CACHE'.
	gcc/testsuite/
	* c-c++-common/goacc/cache-1.c: Update.
	* c-c++-common/goacc/cache-2.c: Likewise.
	* g++.dg/goacc/cache-1.C: New.
	* g++.dg/goacc/cache-2.C: Likewise.
	libgomp/
	* testsuite/libgomp.oacc-c++/cache-1.C: New.
	* testsuite/libgomp.oacc-c-c++-common/cache-1.c: Update.

2 files changed, 24 insertions, 1 deletions

diff --git a/libgomp/testsuite/libgomp.oacc-c++/cache-1.C b/libgomp/testsuite/libgomp.oacc-c++/cache-1.C
new file mode 100644
index 0000000..fcb1f84
--- /dev/null
+++ b/libgomp/testsuite/libgomp.oacc-c++/cache-1.C
@@ -0,0 +1,13 @@
+/* OpenACC 'cache' directive.  */
+
+/* See also corresponding C/C++ variant '../libgomp.oacc-c-c++-common/cache-1.c'.  */
+
+#include "../../../gcc/testsuite/g++.dg/goacc/cache-1.C"
+
+int
+main (int argc, char *argv[])
+{
+  test<0> ();
+
+  return 0;
+}
diff --git a/libgomp/testsuite/libgomp.oacc-c-c++-common/cache-1.c b/libgomp/testsuite/libgomp.oacc-c-c++-common/cache-1.c
index 16aaed5..c0dddb3 100644
--- a/libgomp/testsuite/libgomp.oacc-c-c++-common/cache-1.c
+++ b/libgomp/testsuite/libgomp.oacc-c-c++-common/cache-1.c
@@ -1,3 +1,13 @@
-/* OpenACC cache directive.  */
+/* OpenACC 'cache' directive.  */
+
+/* See also corresponding C++ variant '../libgomp.oacc-c++/cache-1.C'.  */
 
 #include "../../../gcc/testsuite/c-c++-common/goacc/cache-1.c"
+
+int
+main (int argc, char *argv[])
+{
+  test ();
+
+  return 0;
+}