call.c (build_over_call): Set TREE_NO_UNUSED_WARNING too.
authorJakub Jelinek <jakub@redhat.com>
Thu, 14 Mar 2002 14:26:56 +0000 (15:26 +0100)
committerJakub Jelinek <jakub@gcc.gnu.org>
Thu, 14 Mar 2002 14:26:56 +0000 (15:26 +0100)
* call.c (build_over_call): Set TREE_NO_UNUSED_WARNING too.
* cvt.c (convert_to_void): Preserve TREE_NO_UNUSED_WARNING.

* g++.dg/warn/Wunused-1.C: New test.

From-SVN: r50770

gcc/cp/ChangeLog
gcc/cp/call.c
gcc/cp/cvt.c
gcc/testsuite/ChangeLog
gcc/testsuite/g++.dg/warn/Wunused-1.C [new file with mode: 0644]

index b97a1a443109aa947a3a212a0b4b2b8c58f5c94b..40c1e0d61fedfec348cf07c2fc442b8307baf880 100644 (file)
@@ -1,3 +1,8 @@
+2002-03-14  Jakub Jelinek  <jakub@redhat.com>
+
+       * call.c (build_over_call): Set TREE_NO_UNUSED_WARNING too.
+       * cvt.c (convert_to_void): Preserve TREE_NO_UNUSED_WARNING.
+
 2002-03-12  Richard Sandiford  <rsandifo@redhat.com>
 
        * mangle.c (write_builtin_type): Handle 128-bit integers even if
index 31b5baaf3fe9d4207b54971c6fb3f220aa2b9176..6f67e3d7b51172f50aeee731fe48fa98d04ba17f 100644 (file)
@@ -4305,6 +4305,7 @@ build_over_call (cand, args, flags)
             Ideally, the notions of having side-effects and of being
             useless would be orthogonal.  */
          TREE_SIDE_EFFECTS (val) = 1;
+         TREE_NO_UNUSED_WARNING (val) = 1;
        }
       else
        val = build (MODIFY_EXPR, TREE_TYPE (to), to, arg);
index 1d5dc90955eabe36b4f36dc49ab73058fff4cc23..cea204e29dc0dc4249a54dea90c97d5208e1cd06 100644 (file)
@@ -852,6 +852,7 @@ convert_to_void (expr, implicit)
            tree t = build (COMPOUND_EXPR, TREE_TYPE (new_op1),
                            TREE_OPERAND (expr, 0), new_op1);
            TREE_SIDE_EFFECTS (t) = TREE_SIDE_EFFECTS (expr);
+           TREE_NO_UNUSED_WARNING (t) = TREE_NO_UNUSED_WARNING (expr);
            expr = t;
          }
 
index 3b18306aa6ba30d3e13929f6e4cafae0ada4b71b..c65803b6a43d6e04ceacc49ea1473bd25021a200 100644 (file)
@@ -1,3 +1,7 @@
+2002-03-14  Jakub Jelinek  <jakub@redhat.com>
+
+       * g++.dg/warn/Wunused-1.C: New test.
+
 2002-02-13  Richard Sandiford  <rsandifo@redhat.com>
 
        * g++.dg/abi/mangle6.C: New test.
diff --git a/gcc/testsuite/g++.dg/warn/Wunused-1.C b/gcc/testsuite/g++.dg/warn/Wunused-1.C
new file mode 100644 (file)
index 0000000..60ceb4f
--- /dev/null
@@ -0,0 +1,15 @@
+// Test whether -Wunused handles empty classes the same as non-empty.
+// { dg-do compile }
+// { dg-options "-Wunused" }
+
+struct A {};
+struct B { char c; };
+
+void foo ()
+{
+  struct A a0, a1;
+  struct B b0, b1 = { 25 };
+
+  a0 = a1;     // { dg-bogus "value computed is not used" }
+  b0 = b1;
+}