[PATCH] c++: Avoid duplicate trivial_abi cleanup in cdtor clones [PR125066]

[Yuxuan Chen]

From: Yuxuan Chen <i...@yuxuan.ch>

Constructor and destructor clones already have a genericized copy of the
original body, including parameter cleanups.  Do not add another front-end
CLEANUP_STMT while processing a clone.

gcc/cp/ChangeLog:

        PR c++/125066
        * decl.cc (store_parm_decls): Do not register trivial_abi parameter
        cleanups for cloned functions.

gcc/testsuite/ChangeLog:

        PR c++/125066
        * g++.dg/cpp0x/attr-trivial_abi10.C: New test.

Signed-off-by: Yuxuan Chen <i...@yuxuan.ch>

diff --git a/gcc/cp/decl.cc b/gcc/cp/decl.cc
index a2233107317..e1391ddfd0b 100644
--- a/gcc/cp/decl.cc
+++ b/gcc/cp/decl.cc
@@ -20276,7 +20276,7 @@ store_parm_decls (tree current_function_parms)
 
   /* Register cleanups for parameters with trivial_abi attribute, the cleanup
      of which is the callee's responsibility.  */
-  if (!processing_template_decl)
+  if (!processing_template_decl && !DECL_CLONED_FUNCTION_P (fndecl))
     for (tree parm = DECL_ARGUMENTS (fndecl); parm; parm = DECL_CHAIN (parm))
       {
        if (TREE_CODE (parm) == PARM_DECL)
diff --git a/gcc/testsuite/g++.dg/cpp0x/attr-trivial_abi10.C 
b/gcc/testsuite/g++.dg/cpp0x/attr-trivial_abi10.C
new file mode 100644
index 00000000000..5e0b2ffdf5c
--- /dev/null
+++ b/gcc/testsuite/g++.dg/cpp0x/attr-trivial_abi10.C
@@ -0,0 +1,14 @@
+// PR c++/125066
+// { dg-do compile { target c++11 } }
+
+class Callback;
+struct Handler {
+  Handler(Callback);
+};
+struct [[clang::trivial_abi]] Holder {
+  ~Holder();
+};
+struct [[clang::trivial_abi]] Callback {
+  Holder holder;
+};
+Handler::Handler(Callback) {}
-- 
2.55.0