diff --git a/test/CFrontend/2006-09-11-BitfieldRefCrash.c b/test/CFrontend/2006-09-11-BitfieldRefCrash.c
new file mode 100644
index 00000000000..d06cc3afbf3
--- /dev/null
+++ b/test/CFrontend/2006-09-11-BitfieldRefCrash.c
@@ -0,0 +1,12 @@
+// RUN: %llvmgcc %s -S -o -
+// PR906
+
+struct state_struct {
+  unsigned long long phys_frame: 50;
+  unsigned valid : 2;
+} s;
+
+int mem_access(struct state_struct *p) {
+  return p->valid;
+}
+