1; RUN: llc < %s -mtriple=armv7-apple-darwin | FileCheck %s
2; PHI elimination shouldn't break backedge.
3; rdar://8263994
4
5%struct.list_data_s = type { i16, i16 }
6%struct.list_head = type { %struct.list_head*, %struct.list_data_s* }
7
8define arm_apcscc %struct.list_head* @t(%struct.list_head* %list) nounwind {
9entry:
10  %0 = icmp eq %struct.list_head* %list, null
11  br i1 %0, label %bb2, label %bb
12
13bb:
14; CHECK: LBB0_2:
15; CHECK: bne LBB0_2
16; CHECK-NOT: b LBB0_2
17; CHECK: bx lr
18  %list_addr.05 = phi %struct.list_head* [ %2, %bb ], [ %list, %entry ]
19  %next.04 = phi %struct.list_head* [ %list_addr.05, %bb ], [ null, %entry ]
20  %1 = getelementptr inbounds %struct.list_head* %list_addr.05, i32 0, i32 0
21  %2 = load %struct.list_head** %1, align 4
22  store %struct.list_head* %next.04, %struct.list_head** %1, align 4
23  %3 = icmp eq %struct.list_head* %2, null
24  br i1 %3, label %bb2, label %bb
25
26bb2:
27  %next.0.lcssa = phi %struct.list_head* [ null, %entry ], [ %list_addr.05, %bb ]
28  ret %struct.list_head* %next.0.lcssa
29}
30