Bug fix, CodeGen of (void*) - (void*) was broken.
 - <rdar://problem/6122967>

llvm-svn: 54338
diff --git a/clang/test/CodeGen/2008-08-04-void-pointer-arithmetic.c b/clang/test/CodeGen/2008-08-04-void-pointer-arithmetic.c
new file mode 100644
index 0000000..fc54dca
--- /dev/null
+++ b/clang/test/CodeGen/2008-08-04-void-pointer-arithmetic.c
@@ -0,0 +1,6 @@
+// RUN: clang --emit-llvm -o - %s
+// <rdar://problem/6122967>
+
+int f0(void *a, void *b) {
+  return a - b;
+}