re PR c++/88969 (ICE in build_op_delete_call, at cp/call.c:6509)

/cp
2019-01-25  Paolo Carlini  <paolo.carlini@oracle.com>

	PR c++/88969
	* call.c (build_op_delete_call): Implement 7.6.2.5/(10.1).
	* decl2.c (coerce_delete_type): Use build_pointer_type instead
	of TYPE_POINTER_TO.

/testsuite
2019-01-25  Paolo Carlini  <paolo.carlini@oracle.com>

	PR c++/88969
	* g++.dg/cpp2a/destroying-delete2.C: New.
	* g++.dg/cpp2a/destroying-delete3.C: Likewise.

From-SVN: r268278

gcc/cp/ChangeLog

+2019-01-25  Paolo Carlini  <paolo.carlini@oracle.com>
+
+	PR c++/88969
+	* call.c (build_op_delete_call): Implement 7.6.2.5/(10.1).
+	* decl2.c (coerce_delete_type): Use build_pointer_type instead
+	of TYPE_POINTER_TO.
+
 2019-01-24  Jason Merrill  <jason@redhat.com>
 
 	PR c++/89001 - mangling of reference temporaries

gcc/cp/call.c

@@ -6461,6 +6461,19 @@ build_op_delete_call (enum tree_code code, tree addr, tree size,
 		continue;
 	      }
 
+	    /* -- If any of the deallocation functions is a destroying
+	       operator delete, all deallocation functions that are not
+	       destroying operator deletes are eliminated from further
+	       consideration.  */
+	    bool fn_destroying = destroying_delete_p (fn);
+	    bool elt_destroying = destroying_delete_p (elt);
+	    if (elt_destroying != fn_destroying)
+	      {
+		if (elt_destroying)
+		  fn = elt;
+		continue;
+	      }
+
 	    /* -- If the type has new-extended alignment, a function with a
 	       parameter of type std::align_val_t is preferred; otherwise a
 	       function without such a parameter is preferred. If exactly one

gcc/cp/decl2.c

@@ -1757,9 +1757,9 @@ coerce_delete_type (tree decl, location_t loc)
   if (destroying_delete_p (decl))
     {
       if (DECL_CLASS_SCOPE_P (decl))
-	/* If the function is a destroying operator delete declared in class type
-	   C, the type of its first parameter shall be C*.  */
-	ptrtype = TYPE_POINTER_TO (DECL_CONTEXT (decl));
+	/* If the function is a destroying operator delete declared in class
+	   type C, the type of its first parameter shall be C*.  */
+	ptrtype = build_pointer_type (DECL_CONTEXT (decl));
       else
 	/* A destroying operator delete shall be a class member function named
 	   operator delete.  */

gcc/testsuite/ChangeLog

+2019-01-25  Paolo Carlini  <paolo.carlini@oracle.com>
+
+	PR c++/88969
+	* g++.dg/cpp2a/destroying-delete2.C: New.
+	* g++.dg/cpp2a/destroying-delete3.C: Likewise.
+
 2019-01-25  Steven G. Kargl  <kargl@gcc.gnu.org>
 
 	PR fortran/85780

gcc/testsuite/g++.dg/cpp2a/destroying-delete2.C

+// PR c++/88969
+// { dg-do compile { target c++2a } }
+
+#include <new>
+
+namespace delete_selection_d {
+  struct B {
+    void operator delete(void*) = delete;
+    void operator delete(B *, std::destroying_delete_t) = delete;  // { dg-message "declared here" }
+  };
+  void delete_B(B *b) { delete b; }  // { dg-error "use of deleted function" }
+}
+
+namespace delete_selection_r {
+  struct B {
+    void operator delete(B *, std::destroying_delete_t) = delete;  // { dg-message "declared here" }
+    void operator delete(void*) = delete;
+  };
+  void delete_B(B *b) { delete b; }  // { dg-error "use of deleted function" }
+}

gcc/testsuite/g++.dg/cpp2a/destroying-delete3.C

+// PR c++/88969
+// { dg-do compile { target c++2a } }
+
+#include <new>
+
+struct B {
+  void operator delete(void*, std::destroying_delete_t);  // { dg-error ".operator delete. takes type .B*." }
+};