re PR c++/46304 (g++ crashes with ICE in bitmap_first_set_bit, at bitmap.c:770)

	PR c++/46304
	* typeck.c (cp_build_binary_op): Fold COMPLEX_EXPR.

From-SVN: r172754

gcc/cp/ChangeLog

 2011-04-19  Jason Merrill  <jason@redhat.com>
 
+	PR c++/46304
+	* typeck.c (cp_build_binary_op): Fold COMPLEX_EXPR.
+
 	PR c++/45267
 	* decl.c (duplicate_decls): Keep always_inline attribute
 	in sync with DECL_DISREGARD_INLINE_LIMITS.

gcc/cp/typeck.c

@@ -4357,7 +4357,11 @@ cp_build_binary_op (location_t location,
 		  gcc_unreachable();
 		}
 	    }
-	  return build2 (COMPLEX_EXPR, result_type, real, imag);
+	  real = fold_if_not_in_template (real);
+	  imag = fold_if_not_in_template (imag);
+	  result = build2 (COMPLEX_EXPR, result_type, real, imag);
+	  result = fold_if_not_in_template (result);
+	  return result;
 	}
 
       /* For certain operations (which identify themselves by shorten != 0)

gcc/testsuite/ChangeLog

 2011-04-19  Jason Merrill  <jason@redhat.com>
 
+	* g++.dg/ext/complex7.C: New.
+
 	* g++.dg/ext/attrib41.C: New.
 
 2011-04-19  Kaz Kojima  <kkojima@gcc.gnu.org>

gcc/testsuite/g++.dg/ext/complex7.C

+// { dg-options "" }
+
+class A
+{
+  static const _Complex double x = 1.0 + 2.0i;
+};