c++: Don't require accessible dtors for some forms of new [PR59238]

Jakub noticed that in build_new_1 we needed to add tf_no_cleanup to avoid
building a cleanup for a TARGET_EXPR that we already know is going to be
used to initialize something, so the cleanup will never be run.  The best
place to add it is close to where we build the INIT_EXPR; in
cp_build_modify_expr fixes the single-object new, in expand_default_init
fixes array new.

Co-authored-by: Jakub Jelinek  <jakub@redhat.com>

gcc/cp/ChangeLog:

	PR c++/59238
	* init.c (expand_default_init): Pass tf_no_cleanup when building
	a TARGET_EXPR to go on the RHS of an INIT_EXPR.
	* typeck.c (cp_build_modify_expr): Likewise.

gcc/testsuite/ChangeLog:

	PR c++/59238
	* g++.dg/cpp0x/new4.C: New test.

3 files changed, 38 insertions, 2 deletions

diff --git a/gcc/cp/init.c b/gcc/cp/init.c
index 0b98f33..3c3e05d 100644
--- a/gcc/cp/init.c
+++ b/gcc/cp/init.c
@@ -1922,7 +1922,7 @@ expand_default_init (tree binfo, tree true_exp, tree exp, tree init, int flags,
 	   in an exception region.  */;
       else
 	init = ocp_convert (type, init, CONV_IMPLICIT|CONV_FORCE_TEMP,
-			    flags, complain);
+			    flags, complain | tf_no_cleanup);
 
       if (TREE_CODE (init) == MUST_NOT_THROW_EXPR)
 	/* We need to protect the initialization of a catch parm with a
diff --git a/gcc/cp/typeck.c b/gcc/cp/typeck.c
index 4d499af..afbb8ef 100644
--- a/gcc/cp/typeck.c
+++ b/gcc/cp/typeck.c
@@ -8860,7 +8860,7 @@ cp_build_modify_expr (location_t loc, tree lhs, enum tree_code modifycode,
        LOOKUP_ONLYCONVERTING.  */
     newrhs = convert_for_initialization (lhs, olhstype, newrhs, LOOKUP_NORMAL,
 					 ICR_INIT, NULL_TREE, 0,
-                                         complain);
+					 complain | tf_no_cleanup);
   else
     newrhs = convert_for_assignment (olhstype, newrhs, ICR_ASSIGN,
 				     NULL_TREE, 0, complain, LOOKUP_IMPLICIT);
diff --git a/gcc/testsuite/g++.dg/cpp0x/new4.C b/gcc/testsuite/g++.dg/cpp0x/new4.C
new file mode 100644
index 0000000..728ef4e
--- /dev/null
+++ b/gcc/testsuite/g++.dg/cpp0x/new4.C
@@ -0,0 +1,36 @@
+// PR c++/59238
+// { dg-do compile { target c++11 } }
+
+struct A { ~A () = delete; };
+A *pa{new A{}};
+A *pa2{new A[2]{}};
+
+class B { ~B () = default; };
+B *pb{new B{}};
+
+struct E {
+  ~E () = delete;
+private:
+  int x;
+};
+E *pe{new E{}};
+
+class C { ~C (); };
+C *pc{new C{}};
+
+class D { ~D () {} };
+D *pd{new D{}};
+
+struct F {
+  F () = default;
+  ~F () = delete;
+};
+F *pf{new F{}};
+
+struct G {
+  G () = default;
+  ~G () = delete;
+private:
+  int x;
+};
+G *pg{new G{}};