1; RUN: opt -hotcoldsplit -hotcoldsplit-threshold=0 -S < %s | FileCheck %s
2
3target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
4target triple = "x86_64-apple-macosx10.14.0"
5
6; The block "if.end" in @foo is extracted into a new function, @foo.cold.1.
7; Check the following:
8
9; CHECK-LABEL: define {{.*}}@foo.cold.1
10
11; - The llvm.dbg.value intrinsic pointing to an argument in @foo (%arg1) is
12;   dropped
13; CHECK-NOT: llvm.dbg.value
14
15; - Instructions without locations in the original function have no
16;   location in the new function
17; CHECK:      [[ADD1:%.*]] = add i32 %{{.*}}, 1{{$}}
18
19; - Ditto (see above), calls are not special
20; CHECK-NEXT: call void @sink(i32 [[ADD1]])
21
22; - Line locations are preserved
23; CHECK-NEXT: call void @sink(i32 [[ADD1]]), !dbg [[LINE1:![0-9]+]]
24
25; - llvm.dbg.value intrinsics for values local to @foo.cold.1 are preserved
26; CHECK-NEXT: llvm.dbg.value(metadata i32 [[ADD1]], metadata [[VAR1:![0-9]+]], metadata !DIExpression()), !dbg [[LINE1]]
27
28; - Expressions inside of dbg.value intrinsics are preserved
29; CHECK-NEXT: llvm.dbg.value(metadata i32 [[ADD1]], metadata [[VAR1]], metadata !DIExpression(DW_OP_constu, 1, DW_OP_plus, DW_OP_stack_value)
30
31; - The DISubprogram for @foo.cold.1 has an empty DISubroutineType
32; CHECK: [[FILE:![0-9]+]] = !DIFile(filename: "<stdin>"
33; CHECK: [[EMPTY_MD:![0-9]+]] = !{}
34; CHECK: [[EMPTY_TYPE:![0-9]+]] = !DISubroutineType(types: [[EMPTY_MD]])
35; CHECK: [[NEWSCOPE:![0-9]+]] = distinct !DISubprogram(name: "foo.cold.1", linkageName: "foo.cold.1", scope: null, file: [[FILE]], type: [[EMPTY_TYPE]], spFlags: DISPFlagLocalToUnit | DISPFlagDefinition | DISPFlagOptimized
36
37; - Line locations in @foo.cold.1 point to the new scope for @foo.cold.1
38; CHECK: [[LINE1]] = !DILocation(line: 1, column: 1, scope: [[NEWSCOPE]])
39
40define void @foo(i32 %arg1) !dbg !6 {
41entry:
42  %var = add i32 0, 0, !dbg !11
43  br i1 undef, label %if.then, label %if.end
44
45if.then:                                          ; preds = %entry
46  ret void
47
48if.end:                                           ; preds = %entry
49  call void @llvm.dbg.value(metadata i32 %arg1, metadata !9, metadata !DIExpression()), !dbg !11
50  %add1 = add i32 %arg1, 1
51  call void @sink(i32 %add1)
52  call void @sink(i32 %add1), !dbg !11
53  call void @llvm.dbg.value(metadata i32 %add1, metadata !9, metadata !DIExpression()), !dbg !11
54  call void @llvm.dbg.value(metadata i32 %add1, metadata !9, metadata !DIExpression(DW_OP_constu, 1, DW_OP_plus, DW_OP_stack_value)), !dbg !11
55  ret void
56}
57
58declare void @llvm.dbg.value(metadata, metadata, metadata)
59
60declare void @sink(i32) cold
61
62!llvm.dbg.cu = !{!0}
63!llvm.debugify = !{!3, !4}
64!llvm.module.flags = !{!5}
65
66!0 = distinct !DICompileUnit(language: DW_LANG_C, file: !1, producer: "debugify", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2)
67!1 = !DIFile(filename: "<stdin>", directory: "/")
68!2 = !{}
69!3 = !{i32 7}
70!4 = !{i32 1}
71!5 = !{i32 2, !"Debug Info Version", i32 3}
72!6 = distinct !DISubprogram(name: "foo", linkageName: "foo", scope: null, file: !1, line: 1, type: !7, isLocal: false, isDefinition: true, scopeLine: 1, isOptimized: true, unit: !0, retainedNodes: !8)
73!7 = !DISubroutineType(types: !2)
74!8 = !{!9}
75!9 = !DILocalVariable(name: "1", scope: !6, file: !1, line: 1, type: !10)
76!10 = !DIBasicType(name: "ty32", size: 32, encoding: DW_ATE_unsigned)
77!11 = !DILocation(line: 1, column: 1, scope: !6)
78