c++: templates, attributes, #pragma target [PR114772]

Since r12-5426 apply_late_template_attributes suppresses various global
state to avoid applying active pragmas to earlier declarations; we also
need to override target_option_current_node.

	PR c++/114772
	PR c++/101180

gcc/cp/ChangeLog:

	* pt.cc (apply_late_template_attributes): Also override
	target_option_current_node.

gcc/testsuite/ChangeLog:

	* g++.dg/ext/pragma-target2.C: New test.

(cherry picked from commit 5fdb0145fb9499f5db9e27f775895ce4a39215e4)

diff --git a/gcc/cp/pt.cc b/gcc/cp/pt.cc
index a4028a545a3376609387a13b60979504bd8cb160..26b9df94179589a4f3755b28521d8648d6fa135c 100644 (file)
--- a/gcc/cp/pt.cc
+++ b/gcc/cp/pt.cc
@@ -12245,6 +12245,8 @@ apply_late_template_attributes (tree *decl_p, tree attributes, int attr_flags,
   auto o4 = make_temp_override (scope_chain->omp_declare_target_attribute,
                                NULL);
   auto o5 = make_temp_override (scope_chain->omp_begin_assumes, NULL);
+  auto o6 = make_temp_override (target_option_current_node,
+                               target_option_default_node);
 
   cplus_decl_attributes (decl_p, late_attrs, attr_flags);
 

diff --git a/gcc/testsuite/g++.dg/ext/pragma-target2.C b/gcc/testsuite/g++.dg/ext/pragma-target2.C
new file mode 100644 (file)
index 0000000..53eb7dd
--- /dev/null
+++ b/gcc/testsuite/g++.dg/ext/pragma-target2.C
@@ -0,0 +1,18 @@
+// PR c++/114772
+// { dg-do compile { target x86_64-*-* } }
+
+template<typename V, bool STREAMING>
+inline __attribute__((always_inline))
+__attribute__((warn_unused_result))
+int walk_document(V visitor) {return 0;}
+
+template<bool STREAMING>
+void parse_document() {
+    int r = walk_document<bool, STREAMING>(false);
+}
+
+void stage2_next() {
+    parse_document<true>();
+}
+
+#pragma GCC target("pclmul")