1; RUN: opt < %s -instcombine -S | grep icmp
2; PR1646
3
4@__gthrw_pthread_cancel = weak alias i32 (i32), i32 (i32)* @pthread_cancel		; <i32 (i32)*> [#uses=1]
5@__gthread_active_ptr.5335 = internal constant i8* bitcast (i32 (i32)* @__gthrw_pthread_cancel to i8*)		; <i8**> [#uses=1]
6define weak i32 @pthread_cancel(i32) {
7       ret i32 0
8}
9
10define i1 @__gthread_active_p() {
11entry:
12	%tmp1 = load i8*, i8** @__gthread_active_ptr.5335, align 4		; <i8*> [#uses=1]
13	%tmp2 = icmp ne i8* %tmp1, null		; <i1> [#uses=1]
14	ret i1 %tmp2
15}
16