|  | ; RUN: opt < %s -instcombine | 
|  | ; PR3381 | 
|  | target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128" | 
|  | target triple = "x86_64-unknown-linux-gnu" | 
|  | %struct.atomic_t = type { i32 } | 
|  | %struct.inode = type { i32, %struct.mutex } | 
|  | %struct.list_head = type { %struct.list_head*, %struct.list_head* } | 
|  | %struct.lock_class_key = type {  } | 
|  | %struct.mutex = type { %struct.atomic_t, %struct.rwlock_t, %struct.list_head } | 
|  | %struct.rwlock_t = type { %struct.lock_class_key } | 
|  |  | 
|  | define void @handle_event(%struct.inode* %bar) nounwind { | 
|  | entry: | 
|  | %0 = getelementptr %struct.inode, %struct.inode* %bar, i64 -1, i32 1, i32 1		; <%struct.rwlock_t*> [#uses=1] | 
|  | %1 = bitcast %struct.rwlock_t* %0 to i32*		; <i32*> [#uses=1] | 
|  | store i32 1, i32* %1, align 4 | 
|  | ret void | 
|  | } |