Handle packed structs in the CBackend.

llvm-svn: 39752
diff --git a/llvm/test/CodeGen/CBackend/2007-07-11-PackedStruct.ll b/llvm/test/CodeGen/CBackend/2007-07-11-PackedStruct.ll
new file mode 100644
index 0000000..6057616
--- /dev/null
+++ b/llvm/test/CodeGen/CBackend/2007-07-11-PackedStruct.ll
@@ -0,0 +1,9 @@
+; RUN: llvm-as < %s | llc -march=c | grep {packed}
+
+	%struct.p = type <{ i16 }>
+
+define i32 @main() {
+entry:
+        %t = alloca %struct.p, align 2
+	ret i32 5
+}