1; RUN: opt -mtriple=amdgcn-- -S -structurizecfg -si-annotate-control-flow %s | FileCheck -check-prefix=OPT %s
2; RUN: llc -march=amdgcn -verify-machineinstrs < %s | FileCheck -check-prefix=GCN %s
3
4
5; OPT-LABEL: @annotate_unreachable_noloop(
6; OPT-NOT: call i1 @llvm.amdgcn.loop
7
8; GCN-LABEL: {{^}}annotate_unreachable_noloop:
9; GCN: s_cbranch_vccnz
10; GCN-NOT: s_endpgm
11; GCN: .Lfunc_end0
12define void @annotate_unreachable_noloop(<4 x float> addrspace(1)* noalias nocapture readonly %arg) #0 {
13bb:
14  %tmp = tail call i32 @llvm.amdgcn.workitem.id.x()
15  br label %bb1
16
17bb1:                                              ; preds = %bb
18  %tmp2 = sext i32 %tmp to i64
19  %tmp3 = getelementptr inbounds <4 x float>, <4 x float> addrspace(1)* %arg, i64 %tmp2
20  %tmp4 = load <4 x float>, <4 x float> addrspace(1)* %tmp3, align 16
21  br i1 undef, label %bb5, label %bb3
22
23bb3:                                              ; preds = %bb1
24  %tmp6 = extractelement <4 x float> %tmp4, i32 2
25  %tmp7 = fcmp olt float %tmp6, 0.000000e+00
26  br i1 %tmp7, label %bb4, label %bb5 ; crash goes away if these are swapped
27
28bb4:                                              ; preds = %bb3
29  unreachable
30
31bb5:                                              ; preds = %bb3, %bb1
32  unreachable
33}
34
35
36; OPT-LABEL: @annotate_ret_noloop(
37; OPT-NOT: call i1 @llvm.amdgcn.loop
38
39; GCN-LABEL: {{^}}annotate_ret_noloop:
40; GCN: s_cbranch_scc1
41; GCN: s_endpgm
42; GCN: .Lfunc_end1
43define void @annotate_ret_noloop(<4 x float> addrspace(1)* noalias nocapture readonly %arg) #0 {
44bb:
45  %tmp = tail call i32 @llvm.amdgcn.workitem.id.x()
46  br label %bb1
47
48bb1:                                              ; preds = %bb
49  %tmp2 = sext i32 %tmp to i64
50  %tmp3 = getelementptr inbounds <4 x float>, <4 x float> addrspace(1)* %arg, i64 %tmp2
51  %tmp4 = load <4 x float>, <4 x float> addrspace(1)* %tmp3, align 16
52  br i1 undef, label %bb5, label %bb3
53
54bb3:                                              ; preds = %bb1
55  %tmp6 = extractelement <4 x float> %tmp4, i32 2
56  %tmp7 = fcmp olt float %tmp6, 0.000000e+00
57  br i1 %tmp7, label %bb4, label %bb5 ; crash goes away if these are swapped
58
59bb4:                                              ; preds = %bb3
60  ret void
61
62bb5:                                              ; preds = %bb3, %bb1
63  ret void
64}
65
66
67declare i32 @llvm.amdgcn.workitem.id.x() #1
68
69attributes #0 = { nounwind }
70attributes #1 = { nounwind readnone }
71