On 3/25/22 12:34, Jakub Jelinek wrote:
Hi!
cplus_decl_attributes can be called with attributes equal to
error_mark_node, there are some spots in the function that test
it or decl_attributes it calls starts with:
if (TREE_TYPE (*node) == error_mark_node || attributes == error_mark_node)
return NULL_TREE;
But the recent PR104245 change broke this when processing_template_decl
is true.
This fixes it and also fixes an OpenMP problem with such attributes.
Ok for trunk if it passes bootstrap/regtest?
2022-03-25 Jakub Jelinek <ja...@redhat.com>
PR c++/104668
* decl2.cc (splice_template_attributes): Return NULL if *p is
error_mark_node.
(cplus_decl_attributes): Don't chain on OpenMP attributes if
attributes is error_mark_node.
* g++.dg/cpp0x/pr104668.C: New test.
--- gcc/cp/decl2.cc.jj 2022-03-09 09:09:55.415843331 +0100
+++ gcc/cp/decl2.cc 2022-03-25 17:17:27.769036749 +0100
@@ -1336,7 +1336,7 @@ splice_template_attributes (tree *attr_p
tree late_attrs = NULL_TREE;
tree *q = &late_attrs;
- if (!p)
+ if (!p || *p == error_mark_node)
return NULL_TREE;
for (; *p; )
@@ -1644,6 +1644,8 @@ cplus_decl_attributes (tree *decl, tree
&& DECL_CLASS_SCOPE_P (*decl))
error ("%q+D static data member inside of declare target directive",
*decl);
+ else if (attributes == error_mark_node)
+ ;
Why not check at the beginning of the function?
else if (VAR_P (*decl)
&& (processing_template_decl
|| !cp_omp_mappable_type (TREE_TYPE (*decl))))
--- gcc/testsuite/g++.dg/cpp0x/pr104668.C.jj 2022-03-25 17:25:42.280068058
+0100
+++ gcc/testsuite/g++.dg/cpp0x/pr104668.C 2022-03-25 17:24:44.862881444
+0100
@@ -0,0 +1,13 @@
+// PR c++/104668
+// { dg-do compile { target c++11 } }
+// { dg-excess-errors "" }
+
+template <class... Ts>
+void sink(Ts...);
+template <class... Ts>
+void f(Ts...) {
+ sink([] { struct alignas:Ts) S {}; }...); }
+}
+int main() {
+ f(0);
+}
Jakub
