Handle simple struct member expr.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@43258 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/CodeGen/struct.c b/test/CodeGen/struct.c
new file mode 100644
index 0000000..a3753d3
--- /dev/null
+++ b/test/CodeGen/struct.c
@@ -0,0 +1,39 @@
+// RUN: clang %s -emit-llvm
+
+struct  {
+  int x;
+  int y;
+} point;
+
+void fn1() {
+  point.x = 42;
+}
+
+/* Nested member */
+struct  {
+  struct {
+    int a;
+    int b;
+  } p1;
+} point2;
+
+void fn2() {
+  point2.p1.a = 42;
+}
+
+/* Indirect reference */
+typedef struct __sf {
+ unsigned char *c;
+ short flags;
+} F;
+
+typedef struct __sf2 {
+  F *ff;
+} F2;
+
+int fn3(F2 *c) {
+  if (c->ff->c >= 0)
+    return 1;
+  else
+    return 0;
+}