re PR c++/47476 ([C++0x] ICE in potential_constant_expression_1)

	PR c++/47476
	* semantics.c (potential_constant_expression_1): Handle
	TRUTH_XOR_EXPR.

	* g++.dg/cpp0x/pr47476.C: New test.

From-SVN: r169306

gcc/cp/ChangeLog

+2011-01-26  Jakub Jelinek  <jakub@redhat.com>
+
+	PR c++/47476
+	* semantics.c (potential_constant_expression_1): Handle
+	TRUTH_XOR_EXPR.
+
 2011-01-26  Dave Korn  <dave.korn.cygwin@gmail.com>
 
 	PR c++/43601

gcc/cp/semantics.c

@@ -7656,6 +7656,7 @@ potential_constant_expression_1 (tree t, bool want_rval, tsubst_flags_t flags)
     case BIT_IOR_EXPR:
     case BIT_XOR_EXPR:
     case BIT_AND_EXPR:
+    case TRUTH_XOR_EXPR:
     case UNLT_EXPR:
     case UNLE_EXPR:
     case UNGT_EXPR:

gcc/testsuite/ChangeLog

+2011-01-26  Jakub Jelinek  <jakub@redhat.com>
+
+	PR c++/47476
+	* g++.dg/cpp0x/pr47476.C: New test.
+
 2011-01-26  Eric Botcazou  <ebotcazou@adacore.com>
 
 	* gcc.c-torture/compile/20110126-1.c: New test.

gcc/testsuite/g++.dg/cpp0x/pr47476.C

+// PR c++/47476
+// { dg-do compile }
+// { dg-options "-std=c++0x" }
+
+int
+foo (int a, int b)
+{
+  const bool c ((a != 0) == (b != 26));
+  return c;
+}