1; RUN: llvm-reduce --abort-on-invalid-reduction --delta-passes=basic-blocks --test=FileCheck --test-arg=--check-prefix=CHECK-INTERESTINGNESS --test-arg=%s --test-arg=--input-file %s -o %t
2; RUN: FileCheck %s < %t
3
4; Make sure an invalid reduction isn't tried when deleting %bb5,
5; causing the or in %bb6 to use its own output value.
6
7
8; CHECK-INTERESTINGNESS: store i32 0
9; CHECK-INTERESTINGNESS: store i32 1
10; CHECK-INTERESTINGNESS: store i32 2
11
12; CHECK: store i32 0
13; CHECK-NEXT: br label %bb5
14
15; CHECK: bb5:
16; CHECK-NEXT: switch
17
18; CHECK: bb6:
19; CHECK-NEXT: %tmp = phi i32 [ %tmp7, %bb6 ]
20; CHECK-NEXT: store i32 1
21; CHECK-NEXT: %tmp7 = or i32 %tmp, 0
22; CHECK-NEXT: br label %bb6
23
24; CHECK-NOT: bb7
25; CHECK: bb8:
26; CHECK-NEXT: store i32 2,
27define amdgpu_kernel void @snork(i32 %arg, i1 %arg1) {
28bb:
29  store i32 0, ptr addrspace(3) null
30  br i1 %arg1, label %bb5, label %bb7
31
32bb5:                                              ; preds = %bb5, %bb
33  switch i32 %arg, label %bb5 [
34    i32 0, label %bb8
35    i32 1, label %bb6
36  ]
37
38bb6:                                              ; preds = %bb6, %bb5
39  %tmp = phi i32 [ %tmp7, %bb6 ], [ 0, %bb5 ]
40  store i32 1, ptr addrspace(3) null
41  %tmp7 = or i32 %tmp, 0
42  br label %bb6
43
44bb7:
45  store i32 3, ptr addrspace(3) null
46  br label %bb8
47
48bb8:                                              ; preds = %bb5
49  store i32 2, ptr addrspace(3) null
50  unreachable
51}
52