===================================================================
@@ -1781,7 +1781,8 @@ replace_uses_by (tree name, tree val)
{
e = gimple_phi_arg_edge (as_a <gphi *> (stmt),
PHI_ARG_INDEX_FROM_USE (use));
- if (e->flags & EDGE_ABNORMAL)
+ if (e->flags & EDGE_ABNORMAL
+ && !SSA_NAME_OCCURS_IN_ABNORMAL_PHI (val))
{
/* This can only occur for virtual operands, since
for the real ones SSA_NAME_OCCURS_IN_ABNORMAL_PHI (name))
===================================================================
@@ -0,0 +1,42 @@
+// { dg-do compile }
+
+class A
+{
+public:
+ A ();
+};
+class B
+{
+public:
+ B (int);
+ operator void *() { return m_fn1 () ? 0 : this; }
+ int m_fn1 ();
+};
+typedef int jmp_buf[];
+struct C
+{
+ jmp_buf cond_;
+};
+class F
+{
+ C what_;
+ bool m_fn2 ();
+};
+int _setjmp (int[]);
+void longjmp ();
+class D
+{
+public:
+ D () { longjmp (); }
+};
+bool
+F::m_fn2 ()
+{
+ B a (0);
+ if (a)
+ if (_setjmp (what_.cond_))
+ return 0;
+ else
+ D ();
+ A b;
+}