re PR c++/35321 (ICE with invalid use of __builtin_offsetof)

2008-08-27  Paolo Carlini  <paolo.carlini@oracle.com>

	PR c++/35321
	* c-common.c (fold_offsetof_1): Handle TARGET_EXPR like CALL_EXPR.

/testsuite
2008-08-27  Paolo Carlini  <paolo.carlini@oracle.com>

	PR c++/35321
	* g++.dg/parse/offsetof8.C: New.

From-SVN: r139628

gcc/ChangeLog

+2008-08-27  Paolo Carlini  <paolo.carlini@oracle.com>
+
+	PR c++/35321
+	* c-common.c (fold_offsetof_1): Handle TARGET_EXPR like CALL_EXPR.
+
 2008-08-27  Paul Brook  <paul@codesourcery.com>
 
 	* config.gcc: Loosen checks for arm uclinux eabi targets.

gcc/c-common.c

@@ -7685,6 +7685,7 @@ fold_offsetof_1 (tree expr, tree stop_ref)
       return error_mark_node;
 
     case CALL_EXPR:
+    case TARGET_EXPR:
       error ("cannot apply %<offsetof%> when %<operator[]%> is overloaded");
       return error_mark_node;
 

gcc/testsuite/ChangeLog

+2008-08-27  Paolo Carlini  <paolo.carlini@oracle.com>
+
+	PR c++/35321
+	* g++.dg/parse/offsetof8.C: New.
+
 2008-08-27  Manuel Lopez-Ibanez  <manu@gcc.gnu.org>
 
 	PR c++/17880

gcc/testsuite/g++.dg/parse/offsetof8.C

+// PR c++/35321
+
+struct A
+{
+  A operator[] (int);
+};
+
+struct B
+{
+  A a;
+};
+
+void foo()
+{
+  __builtin_offsetof(B, a[0]); /* { dg-error "error: cannot apply 'offsetof' when 'operator\\\[\\\]' is overloaded" } */
+}