re PR c++/8674 (ICE in cp_expr_size, at cp/cp-lang.c:307)

        PR c++/8674
        * call.c (build_over_call): Check specifically for TARGET_EXPR
        when eliding.

From-SVN: r60260

diff --git a/gcc/testsuite/g++.dg/init/elide3.C b/gcc/testsuite/g++.dg/init/elide3.C
new file mode 100644 (file)
index 0000000..e6d3300
--- /dev/null
+++ b/gcc/testsuite/g++.dg/init/elide3.C
@@ -0,0 +1,30 @@
+// PR c++/8674
+
+// Bug: Since B().a is an rvalue, we tried to treat it like a TARGET_EXPR
+// and elide the copy.  But that produces a bitwise copy, which causes us
+// to abort in cp_expr_size.
+
+// Test that we actually run the A copy constructor when calling f().
+
+// { dg-do run }
+
+int c;
+
+struct A
+{
+  A () { ++c; }
+  A (const A&) { ++c; }
+};
+
+struct B
+{
+  A a;
+};
+
+void f (A) { }
+
+int main ()
+{
+  f (B().a);
+  return c < 2;
+}