re PR c/17424 (ICE with sizeof an undeclared variable)

	PR c/17424
	* c-typeck.c (c_expr_sizeof_expr): Check for error_mark_node.

testsuite:
	* gcc.dg/pr17424-1.c: New test.

From-SVN: r87705

gcc/ChangeLog

+2004-09-18  Joseph S. Myers  <jsm@polyomino.org.uk>
+
+	PR c/17424
+	* c-typeck.c (c_expr_sizeof_expr): Check for error_mark_node.
+
 2004-09-18  Diego Novillo  <dnovillo@redhat.com>
 
 	* tree-ssa-alias.c (setup_pointers_and_addressables): Don't

gcc/c-typeck.c

@@ -1855,9 +1855,18 @@ struct c_expr
 c_expr_sizeof_expr (struct c_expr expr)
 {
   struct c_expr ret;
-  ret.value = c_sizeof (TREE_TYPE (expr.value));
-  ret.original_code = ERROR_MARK;
-  pop_maybe_used (C_TYPE_VARIABLE_SIZE (TREE_TYPE (expr.value)));
+  if (expr.value == error_mark_node)
+    {
+      ret.value = error_mark_node;
+      ret.original_code = ERROR_MARK;
+      pop_maybe_used (false);
+    }
+  else
+    {
+      ret.value = c_sizeof (TREE_TYPE (expr.value));
+      ret.original_code = ERROR_MARK;
+      pop_maybe_used (C_TYPE_VARIABLE_SIZE (TREE_TYPE (expr.value)));
+    }
   return ret;
 }
 

gcc/testsuite/ChangeLog

+2004-09-18  Joseph S. Myers  <jsm@polyomino.org.uk>
+
+	PR c/17424
+	* gcc.dg/pr17424-1.c: New test.
+
 2004-09-18  Diego Novillo  <dnovillo@redhat.com>
 
 	* g++.dg/tree-ssa/pr17153.C: New test.

gcc/testsuite/gcc.dg/pr17424-1.c

+/* Test for bug 17424: ICE for sizeof an undeclared variable.  */
+/* { dg-do compile } */
+/* { dg-options "" } */
+
+;int foezis = sizeof tni; /* { dg-error "'tni' undeclared" } */