1 ; RUN: opt -passes=adce -S < %s | FileCheck %s
2 ; RUN: opt -passes=adce -S < %s --try-experimental-debuginfo-iterators | FileCheck %s
3 ; Test that debug info intrinsics in dead scopes get eliminated by -adce.
5 ; Generated with 'clang -g -S -emit-llvm | opt -passes=mem2reg -inline' at r262899
6 ; (before -passes=adce was augmented) and then hand-reduced. This was the input:
10 ;;void variable_in_unused_subscope(void) {
15 ;;void variable_in_parent_scope(void) {
20 ;;static int empty_function_with_unused_variable(void) {
25 ;;void calls_empty_function_with_unused_variable_in_unused_subscope(void) {
26 ;; { empty_function_with_unused_variable(); }
30 declare void @llvm.dbg.value(metadata, metadata, metadata)
34 ; CHECK-LABEL: define void @variable_in_unused_subscope(
35 define void @variable_in_unused_subscope() !dbg !4 {
37 ; CHECK-NEXT: call void @sink
38 ; CHECK-NEXT: ret void
40 call void @llvm.dbg.value(metadata i32 0, metadata !15, metadata !17), !dbg !18
41 call void @sink(), !dbg !19
45 ; CHECK-LABEL: define void @variable_in_parent_scope(
46 define void @variable_in_parent_scope() !dbg !7 {
48 ; CHECK-NEXT: #dbg_value
49 ; CHECK-NEXT: call void @sink
50 ; CHECK-NEXT: ret void
52 call void @llvm.dbg.value(metadata i32 0, metadata !21, metadata !17), !dbg !22
53 call void @sink(), !dbg !23
57 ; CHECK-LABEL: define void @calls_empty_function_with_unused_variable_in_unused_subscope(
58 define void @calls_empty_function_with_unused_variable_in_unused_subscope() !dbg !8 {
60 ; CHECK-NEXT: call void @sink
61 ; CHECK-NEXT: ret void
63 call void @llvm.dbg.value(metadata i32 0, metadata !26, metadata !17), !dbg !28
64 call void @sink(), !dbg !31
69 !llvm.module.flags = !{!14}
71 !0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !2)
72 !1 = !DIFile(filename: "t.c", directory: "/path/to/test/Transforms/ADCE")
74 !4 = distinct !DISubprogram(name: "variable_in_unused_subscope", scope: !1, file: !1, line: 3, type: !5, isLocal: false, isDefinition: true, scopeLine: 3, flags: DIFlagPrototyped, isOptimized: false, unit: !0, retainedNodes: !2)
75 !5 = !DISubroutineType(types: !6)
77 !7 = distinct !DISubprogram(name: "variable_in_parent_scope", scope: !1, file: !1, line: 8, type: !5, isLocal: false, isDefinition: true, scopeLine: 8, flags: DIFlagPrototyped, isOptimized: false, unit: !0, retainedNodes: !2)
78 !8 = distinct !DISubprogram(name: "calls_empty_function_with_unused_variable_in_unused_subscope", scope: !1, file: !1, line: 18, type: !5, isLocal: false, isDefinition: true, scopeLine: 18, flags: DIFlagPrototyped, isOptimized: false, unit: !0, retainedNodes: !2)
79 !10 = distinct !DISubprogram(name: "empty_function_with_unused_variable", scope: !1, file: !1, line: 13, type: !11, isLocal: true, isDefinition: true, scopeLine: 13, flags: DIFlagPrototyped, isOptimized: false, unit: !0, retainedNodes: !2)
80 !11 = !DISubroutineType(types: !12)
82 !13 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
83 !14 = !{i32 2, !"Debug Info Version", i32 3}
84 !15 = !DILocalVariable(name: "i", scope: !16, file: !1, line: 4, type: !13)
85 !16 = distinct !DILexicalBlock(scope: !4, file: !1, line: 4, column: 3)
87 !18 = !DILocation(line: 4, column: 9, scope: !16)
88 !19 = !DILocation(line: 5, column: 3, scope: !4)
89 !20 = !DILocation(line: 6, column: 1, scope: !4)
90 !21 = !DILocalVariable(name: "i", scope: !7, file: !1, line: 9, type: !13)
91 !22 = !DILocation(line: 9, column: 7, scope: !7)
92 !23 = !DILocation(line: 10, column: 5, scope: !24)
93 !24 = distinct !DILexicalBlock(scope: !7, file: !1, line: 10, column: 3)
94 !25 = !DILocation(line: 11, column: 1, scope: !7)
95 !26 = !DILocalVariable(name: "i", scope: !27, file: !1, line: 14, type: !13)
96 !27 = distinct !DILexicalBlock(scope: !10, file: !1, line: 14, column: 3)
97 !28 = !DILocation(line: 14, column: 9, scope: !27, inlinedAt: !29)
98 !29 = distinct !DILocation(line: 19, column: 5, scope: !30)
99 !30 = distinct !DILexicalBlock(scope: !8, file: !1, line: 19, column: 3)
100 !31 = !DILocation(line: 20, column: 3, scope: !8)
101 !32 = !DILocation(line: 21, column: 1, scope: !8)