1; RUN: opt -passes=openmp-opt -debug-only=openmp-opt -disable-output < %s 2>&1 | FileCheck %s
2; RUN: opt -passes=openmp-opt -pass-remarks-analysis=openmp-opt -disable-output < %s 2>&1 | FileCheck %s --check-prefix=REMARKS
3; REQUIRES: asserts
4; ModuleID = 'single_threaded_exeuction.c'
5
6%struct.ident_t = type { i32, i32, i32, i32, i8* }
7
8@0 = private unnamed_addr constant [1 x i8] c"\00", align 1
9@1 = private unnamed_addr constant %struct.ident_t { i32 0, i32 2, i32 0, i32 0, i8* getelementptr inbounds ([1 x i8], [1 x i8]* @0, i32 0, i32 0) }, align 8
10
11define void @kernel() {
12  call void @__kmpc_kernel_prepare_parallel(i8* null)
13  call void @nvptx()
14  call void @amdgcn()
15  ret void
16}
17
18; REMARKS: remark: single_threaded_execution.c:1:0: Could not internalize function. Some optimizations may not be possible.
19; REMARKS-NOT: remark: single_threaded_execution.c:1:0: Could not internalize function. Some optimizations may not be possible.
20
21; CHECK-NOT: [openmp-opt] Basic block @nvptx entry is executed by a single thread.
22; CHECK: [openmp-opt] Basic block @nvptx if.then is executed by a single thread.
23; CHECK-NOT: [openmp-opt] Basic block @nvptx if.end is executed by a single thread.
24; Function Attrs: noinline
25define internal void @nvptx() {
26entry:
27  %call = call i32 @__kmpc_target_init(%struct.ident_t* nonnull @1, i1 false, i1 false, i1 false)
28  %cmp = icmp eq i32 %call, -1
29  br i1 %cmp, label %if.then, label %if.end
30
31if.then:
32  call void @foo()
33  call void @bar()
34  call void @baz()
35  call void @cold()
36  br label %if.end
37
38if.end:
39  ret void
40}
41
42; CHECK-NOT: [openmp-opt] Basic block @amdgcn entry is executed by a single thread.
43; CHECK: [openmp-opt] Basic block @amdgcn if.then is executed by a single thread.
44; CHECK-NOT: [openmp-opt] Basic block @amdgcn if.end is executed by a single thread.
45; Function Attrs: noinline
46define internal void @amdgcn() {
47entry:
48  %call = call i32 @__kmpc_target_init(%struct.ident_t* nonnull @1, i1 false, i1 true, i1 true)
49  %cmp = icmp eq i32 %call, -1
50  br i1 %cmp, label %if.then, label %if.end
51
52if.then:
53  call void @foo()
54  call void @bar()
55  call void @baz()
56  call void @cold()
57  br label %if.end
58
59if.end:
60  ret void
61}
62
63; CHECK: [openmp-opt] Basic block @foo entry is executed by a single thread.
64; Function Attrs: noinline
65define internal void @foo() {
66entry:
67  ret void
68}
69
70; CHECK: [openmp-opt] Basic block @bar.internalized entry is executed by a single thread.
71; Function Attrs: noinline
72define void @bar() {
73entry:
74  ret void
75}
76
77; CHECK-NOT: [openmp-opt] Basic block @baz entry is executed by a single thread.
78; Function Attrs: noinline
79define weak void @baz() !dbg !8 {
80entry:
81  ret void
82}
83
84; CHECK-NOT: [openmp-opt] Basic block @cold entry is executed by a single thread.
85; Function Attrs: cold convergent noinline nounwind optnone mustprogress
86define weak void @cold() #0 !dbg !9 {
87entry:
88  ret void
89}
90
91declare i32 @llvm.nvvm.read.ptx.sreg.tid.x()
92
93declare i32 @llvm.amdgcn.workitem.id.x()
94
95declare void @__kmpc_kernel_prepare_parallel(i8*)
96
97declare i32 @__kmpc_target_init(%struct.ident_t*, i1, i1, i1)
98
99attributes #0 = { cold noinline }
100
101!llvm.dbg.cu = !{!0}
102!llvm.module.flags = !{!3, !4, !5, !6}
103!nvvm.annotations = !{!7}
104
105!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)
106!1 = !DIFile(filename: "single_threaded_execution.c", directory: "/tmp/single_threaded_execution.c")
107!2 = !{}
108!3 = !{i32 2, !"Debug Info Version", i32 3}
109!4 = !{i32 1, !"wchar_size", i32 4}
110!5 = !{i32 7, !"openmp", i32 50}
111!6 = !{i32 7, !"openmp-device", i32 50}
112!7 = !{void ()* @kernel, !"kernel", i32 1}
113!8 = distinct !DISubprogram(name: "bar", scope: !1, file: !1, line: 8, type: !10, scopeLine: 1, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !2)
114!9 = distinct !DISubprogram(name: "cold", scope: !1, file: !1, line: 8, type: !10, scopeLine: 2, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !2)
115!10 = !DISubroutineType(types: !2)
116