Hi!
Another spot where we mark_used a function (in this case ctor or dtor)
even when it is just artificially used inside of thunks (emitted on mingw
with -Os for the testcase).
Bootstrapped/regtested on x86_64-linux and i686-linux and tested with
a cross compiler to x86_64-mingw on the testcase, ok for trunk?
2024-09-13 Jakub Jelinek <ja...@redhat.com>
PR c++/116678
* optimize.cc: Include decl.h.
(maybe_thunk_body): Temporarily change deprecated_state to
UNAVAILABLE_DEPRECATED_SUPPRESS.
* g++.dg/warn/deprecated-20.C: New test.
--- gcc/cp/optimize.cc.jj 2024-05-21 10:19:34.484528180 +0200
+++ gcc/cp/optimize.cc 2024-09-12 13:56:30.710186354 +0200
@@ -23,6 +23,7 @@ along with GCC; see the file COPYING3.
#include "coretypes.h"
#include "target.h"
#include "cp-tree.h"
+#include "decl.h"
#include "stringpool.h"
#include "cgraph.h"
#include "debug.h"
@@ -287,6 +288,11 @@ maybe_thunk_body (tree fn, bool force)
if (ctor_omit_inherited_parms (fns[0]))
return 0;
+ /* Don't diagnose deprecated or unavailable cdtors just because they
+ have thunks emitted for them. */
+ auto du = make_temp_override (deprecated_state,
+ UNAVAILABLE_DEPRECATED_SUPPRESS);
+
DECL_ABSTRACT_P (fn) = false;
if (!DECL_WEAK (fn))
{
--- gcc/testsuite/g++.dg/warn/deprecated-20.C.jj 2024-09-12
13:54:58.850422325 +0200
+++ gcc/testsuite/g++.dg/warn/deprecated-20.C 2024-09-12 13:55:27.510036714
+0200
@@ -0,0 +1,16 @@
+// PR c++/116678
+// { dg-do compile }
+// { dg-options "-Os -pedantic" }
+
+struct S
+{
+ [[deprecated]] S () { s = 1; } // { dg-bogus "'S::S\\\(\\\)' is
deprecated" }
+ S (int x) { s = x; } // { dg-warning "C\\\+\\\+11 attributes
only available with" "" { target c++98_only } .-1 }
+ ~S () {}
+ int s;
+};
+
+int
+main ()
+{
+}
Jakub
