1 ; RUN: llc -o /dev/null %s
2 ; This testcase produces a situation with unused value numbers in subregister
3 ; liveranges that get distributed by ConnectedVNInfoEqClasses.
4 target triple = "amdgcn--"
6 define spir_kernel void @hoge() {
8 %tmp = tail call i32 @llvm.r600.read.tidig.x()
9 br i1 undef, label %bb2, label %bb23
12 br i1 undef, label %bb6, label %bb8
15 %tmp7 = or i64 undef, undef
19 %tmp9 = phi i64 [ %tmp7, %bb6 ], [ undef, %bb2 ]
20 %tmp10 = icmp eq i32 %tmp, 0
21 br i1 %tmp10, label %bb11, label %bb23
24 br i1 undef, label %bb20, label %bb17
30 %tmp21 = phi i64 [ undef, %bb17 ], [ %tmp9, %bb11 ]
31 %tmp22 = trunc i64 %tmp21 to i32
35 %tmp24 = phi i32 [ %tmp22, %bb20 ], [ undef, %bb8 ], [ undef, %bb ]
39 %tmp26 = phi i32 [ %tmp24, %bb23 ], [ undef, %bb25 ]
40 br i1 undef, label %bb25, label %bb30
43 br i1 undef, label %bb32, label %bb34
46 %tmp33 = zext i32 %tmp26 to i64
53 declare i32 @llvm.r600.read.tidig.x()