PR c++/70584 - error with parenthesized builtin arg

	* cp-gimplify.c (cp_fold) [INDIRECT_REF]: Call
	maybe_undo_parenthesized_ref.

From-SVN: r236616

gcc/cp/ChangeLog

 2016-05-23  Jason Merrill  <jason@redhat.com>
 
+	PR c++/70584
+	* cp-gimplify.c (cp_fold) [INDIRECT_REF]: Call
+	maybe_undo_parenthesized_ref.
+
 	PR c++/70735
 	* pt.c (tsubst_copy): Just return a local variable from
 	non-template context.  Don't call rest_of_decl_compilation for

gcc/cp/cp-gimplify.c

@@ -1996,6 +1996,15 @@ cp_fold (tree x)
 
       break;
 
+    case INDIRECT_REF:
+      /* We don't need the decltype(auto) obfuscation anymore.  */
+      if (REF_PARENTHESIZED_P (x))
+	{
+	  tree p = maybe_undo_parenthesized_ref (x);
+	  return cp_fold_maybe_rvalue (p, rval_ops);
+	}
+      goto unary;
+
     case ADDR_EXPR:
     case REALPART_EXPR:
     case IMAGPART_EXPR:
@@ -2008,7 +2017,7 @@ cp_fold (tree x)
     case BIT_NOT_EXPR:
     case TRUTH_NOT_EXPR:
     case FIXED_CONVERT_EXPR:
-    case INDIRECT_REF:
+    unary:
 
       loc = EXPR_LOCATION (x);
       op0 = cp_fold_maybe_rvalue (TREE_OPERAND (x, 0), rval_ops);

gcc/testsuite/g++.dg/other/i386-10.C

+// { dg-do compile { target i?86-*-* x86_64-*-* } }
+// { dg-options -maes }
+
+typedef long long __m128i __attribute__ ((__vector_size__ (16), __may_alias__));
+
+int main()
+{
+    const char index = 1;
+    __m128i r = { };
+
+    r = __builtin_ia32_aeskeygenassist128 (r, (int)(index));
+}