+2002-02-22 Jakub Jelinek <jakub@redhat.com>
+
+ PR c++/5748
+ * stmt.c (expand_anon_union_decl): Set TREE_USED on the anon union
+ decl if any of elements was TREE_USED.
+
2002-02-22 Alexandre Oliva <aoliva@redhat.com>
* config/sparc/sol2.h: Don't include sys/mman.h.
tree cleanup_elt = TREE_PURPOSE (t);
enum machine_mode mode = TYPE_MODE (TREE_TYPE (decl_elt));
+ /* If any of the elements are addressable, so is the entire
+ union. */
+ if (TREE_USED (decl_elt))
+ TREE_USED (decl) = 1;
+
/* Propagate the union's alignment to the elements. */
DECL_ALIGN (decl_elt) = DECL_ALIGN (decl);
DECL_USER_ALIGN (decl_elt) = DECL_USER_ALIGN (decl);
+2002-02-22 Jakub Jelinek <jakub@redhat.com>
+
+ * g++.dg/opt/anonunion1.C: New test.
+
2002-02-22 Nathan Sidwell <nathan@codesourcery.com>
* g++.dg/template/qualttp19.C: New test.
--- /dev/null
+// PR c++/5748
+// This testcase ICEd because used flag from the anon union variables
+// was not propagated back to the anon union itself, causing addressof
+// not to be replaced with stack slot.
+// { dg-do compile }
+// { dg-options "-O2" }
+
+struct A {
+ A ();
+ ~A ();
+ int foo ();
+ int bar (void *x, int y);
+};
+
+int A::foo()
+{
+ union {
+ int a;
+ int b;
+ };
+
+ if (bar (&a, sizeof (int)) != 32)
+ return 16;
+ return 0;
+}