1 files changed, 65 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/pr18241-2.c b/gcc/testsuite/gcc.dg/pr18241-2.c
new file mode 100644
index 00000000000..dce9656a833
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/pr18241-2.c
@@ -0,0 +1,65 @@
+/* { dg-do execute } */
+/* { dg-options "-std=gnu99 -Wall -Wextra -O1" } */ 
+
+extern void *memset (void*, int, unsigned long);
+extern void abort (void);
+
+struct radix_tree_root {
+	unsigned int height;
+	struct radix_tree_node *rnode;
+};
+
+struct radix_tree_node {
+	unsigned int count;
+	void *slots[64];
+	unsigned long tags[2];
+};
+
+struct radix_tree_path {
+	struct radix_tree_node *node, **slot;
+	int offset;
+};
+
+void radix_tree_tag_clear(struct radix_tree_root *root, unsigned long index)
+{
+	struct radix_tree_path path[7], *pathp = path;
+	unsigned int height, shift;
+	volatile unsigned long *addr;
+	
+	height = root->height;
+	
+	shift = (height - 1) * 6;
+	path[0].slot = &root->rnode;
+	
+	while (height > 0) {
+		int offset;
+		
+		offset = (index >> shift) & (64-1);
+		pathp[1].offset = offset;
+		pathp[1].node = *pathp[0].slot;
+		pathp[1].slot = (struct radix_tree_node **)
+			(pathp[1].node->slots + offset);
+		pathp++;
+		shift -= 6;
+		height--;
+	}
+	
+	addr = &(pathp->node->tags[0]) + 1;
+	*addr = 574;
+}
+
+struct radix_tree_root r;
+struct radix_tree_node node;
+
+int main ()
+{
+  	r.height = 1;
+	r.rnode = &node;
+	
+	memset (&node, 0, sizeof (node));
+	
+	node.count = 1;
+	
+	radix_tree_tag_clear (&r, 13);
+	return 0;
+}