1; RUN: opt -passes=openmp-opt-cgscc -debug-only=openmp-opt -disable-output < %s 2>&1 | FileCheck %s
2; REQUIRES: asserts
3; ModuleID = 'single_threaded_exeuction.c'
4
5define void @kernel() {
6  call void @__kmpc_kernel_init(i32 512, i16 1)
7  call void @nvptx()
8  call void @amdgcn()
9  ret void
10}
11
12; CHECK-NOT: [openmp-opt] Basic block @nvptx entry is executed by a single thread.
13; CHECK: [openmp-opt] Basic block @nvptx if.then is executed by a single thread.
14; CHECK-NOT: [openmp-opt] Basic block @nvptx if.end is executed by a single thread.
15; Function Attrs: noinline nounwind uwtable
16define dso_local void @nvptx() {
17entry:
18  %call = call i32 @llvm.nvvm.read.ptx.sreg.tid.x()
19  %cmp = icmp eq i32 %call, 0
20  br i1 %cmp, label %if.then, label %if.end
21
22if.then:
23  call void @bar()
24  br label %if.end
25
26if.end:
27  ret void
28}
29
30; CHECK-NOT: [openmp-opt] Basic block @amdgcn entry is executed by a single thread.
31; CHECK: [openmp-opt] Basic block @amdgcn if.then is executed by a single thread.
32; CHECK-NOT: [openmp-opt] Basic block @amdgcn if.end is executed by a single thread.
33; Function Attrs: noinline nounwind uwtable
34define dso_local void @amdgcn() {
35entry:
36  %call = call i32 @llvm.amdgcn.workitem.id.x()
37  %cmp = icmp eq i32 %call, 0
38  br i1 %cmp, label %if.then, label %if.end
39
40if.then:
41  call void @bar()
42  br label %if.end
43
44if.end:
45  ret void
46}
47
48; CHECK: [openmp-opt] Basic block @bar entry is executed by a single thread.
49; Function Attrs: noinline nounwind uwtable
50define internal void @bar() {
51entry:
52  ret void
53}
54
55declare i32 @llvm.nvvm.read.ptx.sreg.tid.x()
56
57declare i32 @llvm.amdgcn.workitem.id.x()
58
59declare void @__kmpc_kernel_init(i32, i16)
60
61!llvm.dbg.cu = !{!0}
62!llvm.module.flags = !{!3, !4}
63!nvvm.annotations = !{!5}
64
65
66!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 12.0.0", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, splitDebugInlining: false, nameTableKind: None)
67!1 = !DIFile(filename: "single_threaded_execution.c", directory: "/tmp/single_threaded_execution.c")
68!2 = !{}
69!3 = !{i32 2, !"Debug Info Version", i32 3}
70!4 = !{i32 1, !"wchar_size", i32 4}
71!5 = !{void ()* @kernel, !"kernel", i32 1}
72