2003-08-01 Nathan Sidwell <nathan@codesourcery.com>
+ * typeck.c (build_compound_expr): If RHS is a TARGET_EXPR, put the
+ compound expr inside the target's initializer.
+
PR c++/11525
* parser.c (cp_parser_primary_expression): Do not set
non-constant-p merely because it is a dependent scope.
lhs = convert_to_void (lhs, "left-hand operand of comma");
if (lhs == error_mark_node || rhs == error_mark_node)
return error_mark_node;
+
+ if (TREE_CODE (rhs) == TARGET_EXPR)
+ {
+ /* If the rhs is a TARGET_EXPR, then build the compound
+ expression inside the target_expr's initializer. This
+ helps the compiler to eliminate unncessary temporaries. */
+ tree init = TREE_OPERAND (rhs, 1);
+
+ init = build (COMPOUND_EXPR, TREE_TYPE (init), lhs, init);
+ TREE_OPERAND (rhs, 1) = init;
+
+ return rhs;
+ }
return build (COMPOUND_EXPR, TREE_TYPE (rhs), lhs, rhs);
}
--- /dev/null
+// { dg-do run }
+
+
+// Copyright (C) 2003 Free Software Foundation, Inc.
+// Contributed by Nathan Sidwell 30 Jul 2003 <nathan@codesourcery.com>
+
+// compound exprs were causing additional temporaries.
+
+extern "C" int printf (char const *, ...);
+extern "C" void abort ();
+
+
+static unsigned order[] =
+{
+ 1, 2, 502, 102, 101,
+ 0
+};
+
+static unsigned point;
+
+static void Check (unsigned t, unsigned i, void const *ptr, char const *name)
+{
+ printf ("%d %d %p %s\n", t, i, ptr, name);
+
+ if (order[point++] != i + t)
+ abort ();
+
+}
+
+template <int I> struct A
+{
+ A () { Check (0, I, this, __PRETTY_FUNCTION__); }
+ ~A () { Check (100, I, this, __PRETTY_FUNCTION__); }
+ A (A const &) { Check (200, I, this, __PRETTY_FUNCTION__); }
+ A &operator= (A const &) { Check (300, I, this, __PRETTY_FUNCTION__); }
+ void Foo () const { Check (400, I, this, __PRETTY_FUNCTION__); }
+};
+
+template <int I> void Foo (A<I> a)
+{
+ Check (500, I, &a, __PRETTY_FUNCTION__);
+}
+
+int main ()
+{
+ Foo ((A<1> (), A<2> ()));
+ Check (0, 0, 0, "end");
+}