Hi!
On the following testcase where the cdtor attributes aren't on the
in-class declaration but on an out-of-class definition, the cdtors
have their clones created from the in-class declaration, and later on
duplicate_decls updates attributes on the abstract cdtors, but nothing
propagates them to the clones.
Fixed thusly, bootstrapped/regtested on x86_64-linux and i686-linux, ok for
trunk?
2020-11-06 Jakub Jelinek <ja...@redhat.com>
PR c++/67453
* decl.c (duplicate_decls): Propagate DECL_ATTRIBUTES and
DECL_PRESERVE_P from olddecl to its clones if any.
* g++.dg/ext/attr-used-2.C: New test.
--- gcc/cp/decl.c.jj 2020-11-03 21:42:00.536043737 +0100
+++ gcc/cp/decl.c 2020-11-05 17:33:40.064072970 +0100
@@ -2921,6 +2921,16 @@ duplicate_decls (tree newdecl, tree oldd
snode->remove ();
}
+ if (TREE_CODE (olddecl) == FUNCTION_DECL)
+ {
+ tree clone;
+ FOR_EACH_CLONE (clone, olddecl)
+ {
+ DECL_ATTRIBUTES (clone) = DECL_ATTRIBUTES (olddecl);
+ DECL_PRESERVE_P (clone) |= DECL_PRESERVE_P (olddecl);
+ }
+ }
+
/* Remove the associated constraints for newdecl, if any, before
reclaiming memory. */
if (flag_concepts)
--- gcc/testsuite/g++.dg/ext/attr-used-2.C.jj 2020-11-05 17:42:49.895949119
+0100
+++ gcc/testsuite/g++.dg/ext/attr-used-2.C 2020-11-05 17:42:07.934416482
+0100
@@ -0,0 +1,15 @@
+// PR c++/67453
+// { dg-do compile }
+// { dg-final { scan-assembler "_ZN1SC\[12]Ev" } }
+// { dg-final { scan-assembler "_ZN1SD\[12]Ev" } }
+// { dg-final { scan-assembler "_ZN1SC\[12]ERKS_" } }
+
+struct S {
+ S();
+ ~S();
+ S(const S&);
+};
+
+__attribute__((used)) inline S::S() { }
+__attribute__((used)) inline S::~S() { }
+__attribute__((used)) inline S::S(const S&) { }
Jakub
