diff --git a/test/CodeGen/ARM/struct_byval.ll b/test/CodeGen/ARM/struct_byval.ll
new file mode 100644
index 00000000000..0c2f7398cb7
--- /dev/null
+++ b/test/CodeGen/ARM/struct_byval.ll
@@ -0,0 +1,32 @@
+; RUN: llc < %s -mtriple=armv7-apple-ios6.0 | FileCheck %s
+
+; rdar://9877866
+%struct.SmallStruct = type { i32, [8 x i32], [37 x i8] }
+%struct.LargeStruct = type { i32, [1001 x i8], [300 x i32] }
+
+define i32 @f() nounwind ssp {
+entry:
+; CHECK: f:
+; CHECK: ldr
+; CHECK: str
+; CHECK-NOT:bne
+  %st = alloca %struct.SmallStruct, align 4
+  %call = call i32 @e1(%struct.SmallStruct* byval %st)
+  ret i32 0
+}
+
+; Generate a loop for large struct byval
+define i32 @g() nounwind ssp {
+entry:
+; CHECK: g:
+; CHECK: ldr
+; CHECK: sub
+; CHECK: str
+; CHECK: bne
+  %st = alloca %struct.LargeStruct, align 4
+  %call = call i32 @e2(%struct.LargeStruct* byval %st)
+  ret i32 0
+}
+
+declare i32 @e1(%struct.SmallStruct* nocapture byval %in) nounwind
+declare i32 @e2(%struct.LargeStruct* nocapture byval %in) nounwind