diff --git a/test/CodeGen/Generic/fastcall.ll b/test/CodeGen/Generic/fastcall.ll
new file mode 100644
index 0000000..65e66c7
--- /dev/null
+++ b/test/CodeGen/Generic/fastcall.ll
@@ -0,0 +1,14 @@
+; Test fastcc works. Test from bug 2770.
+; RUN: llvm-as < %s | llc -relocation-model=pic
+
+
+%struct.__gcov_var = type {  i32 }
+@__gcov_var = external global %struct.__gcov_var
+
+define fastcc void @gcov_read_words(i32 %words) {
+entry:
+        store i32 %words, i32* getelementptr (%struct.__gcov_var* 
+@__gcov_var,
+i32 0, i32 0)
+        ret void
+}