re PR tree-optimization/64280 (ICE in replace_uses_by, at tree-cfg.c:1789)

2014-12-12  Richard Biener  <rguenther@suse.de>

	PR middle-end/64280
	* tree-cfg.c (replace_uses_by): Guard assert properly.

	* g++.dg/torture/pr64280.C: New testcase.

From-SVN: r218668

gcc/ChangeLog

+2014-12-12  Richard Biener  <rguenther@suse.de>
+
+	PR middle-end/64280
+	* tree-cfg.c (replace_uses_by): Guard assert properly.
+
 2014-12-12  Anthony Green  <green@moxielogic.com>
 
 	* config/moxie/moxie.md: Add use of zex instruction.

gcc/testsuite/ChangeLog

+2014-12-12  Richard Biener  <rguenther@suse.de>
+
+	PR middle-end/64280
+	* g++.dg/torture/pr64280.C: New testcase.
+
 2014-12-12  Jakub Jelinek  <jakub@redhat.com>
 
 	PR rtl-optimization/64255

gcc/testsuite/g++.dg/torture/pr64280.C

+// { 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;
+}

gcc/tree-cfg.c

@@ -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))