1; Test that llvm-reduce can drop unneeded debug metadata nodes referenced by 2; DICompileUnit and DISuprogram. 3; 4; RUN: llvm-reduce --delta-passes=di-metadata --abort-on-invalid-reduction --test FileCheck --test-arg --check-prefixes=CHECK-INTERESTINGNESS --test-arg %s --test-arg --input-file %s -o %t 5; RUN: FileCheck <%t --enable-var-scope %s --implicit-check-not=DIGlobalVariableExpression 6 7; CHECK-INTERESTINGNESS: define void @test() !dbg [[SUBPROG:![0-9]+]] 8; CHECK-INTERESTINGNESS: !llvm.module.flags = !{ 9 10; CHECK-INTERESTINGNESS: !llvm.dbg.cu = !{[[CU:.+]]} 11 12; CHECK-INTERESTINGNESS-DAG: [[CU]] = distinct !DICompileUnit(language: DW_LANG_C99,{{.*}}, retainedTypes: [[TYPES:![0-9]+]] 13; CHECK-INTERESTINGNESS-DAG: [[TYPES]] = !{[[T0:![0-9]+]] 14; CHECK-INTERESTINGNESS-DAG: [[T0]] = !DIBasicType(name: "unsigned int", 15; CHECK-INTERESTINGNESS-DAG: [[SUBPROG]] = distinct !DISubprogram(name: "test", 16 17 18 19; CHECK: define void @test() !dbg [[SUBPROG:![0-9]+]] 20; CHECK: !llvm.module.flags = !{ 21 22; CHECK: !llvm.dbg.cu = !{[[CU:.+]]} 23 24; CHECK-DAG: [[CU]] = distinct !DICompileUnit(language: DW_LANG_C99,{{.*}}, retainedTypes: [[TYPES:![0-9]+]], globals: [[EMPTY:![0-9]+]] 25; CHECK-DAG: [[EMPTY]] = !{} 26; CHECK-DAG: [[TYPES]] = !{[[T0:![0-9]+]] 27; CHECK-DAG: [[T0]] = !DIBasicType(name: "unsigned int", 28; CHECK-DAG: [[SUBPROG]] = distinct !DISubprogram(name: "test", {{.*}}retainedNodes: [[EMPTY]]) 29 30define void @test() !dbg !17 { 31 ret void 32} 33 34!llvm.module.flags = !{!0, !1} 35!llvm.dbg.cu = !{!2} 36 37!0 = !{i32 7, !"Dwarf Version", i32 4} 38!1 = !{i32 2, !"Debug Info Version", i32 3} 39!2 = distinct !DICompileUnit(language: DW_LANG_C99, file: !3, producer: "clang version 16.0.0", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !4, retainedTypes: !12, globals: !14, splitDebugInlining: false, nameTableKind: None, sysroot: "/", sdk: "SDK") 40!3 = !DIFile(filename: "test.c", directory: "/tmp") 41!4 = !{!5} 42!5 = !DICompositeType(tag: DW_TAG_enumeration_type, file: !6, line: 755, baseType: !7, size: 32, elements: !8) 43!6 = !DIFile(filename: "foo.h", directory: "/tmp") 44!7 = !DIBasicType(name: "unsigned int", size: 32, encoding: DW_ATE_unsigned) 45!8 = !{!9, !10, !11} 46!9 = !DIEnumerator(name: "flag_AUTO", value: 0) 47!10 = !DIEnumerator(name: "flag_STDIN", value: 1) 48!11 = !DIEnumerator(name: "flag_INTERACTIVE", value: 2) 49!12 = !{!7, !13} 50!13 = !DIBasicType(name: "char", size: 8, encoding: DW_ATE_unsigned) 51!14 = !{!15} 52!15 = !DIGlobalVariableExpression(var: !16, expr: !DIExpression()) 53!16 = distinct !DIGlobalVariable(scope: null, file: !3, line: 726, type: !13, isLocal: true, isDefinition: true) 54!17 = distinct !DISubprogram(name: "test", scope: !18, file: !18, line: 1839, type: !19, scopeLine: 1846, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagLocalToUnit | DISPFlagDefinition | DISPFlagOptimized, unit: !2, retainedNodes: !21) 55!18 = !DIFile(filename: "bar.c", directory: "/tmp") 56!19 = !DISubroutineType(types: !20) 57!20 = !{null, !7} 58!21 = !{!22, !23, !24} 59!22 = !DILocalVariable(name: "A", arg: 1, scope: !17, file: !18, line: 1839, type: !7) 60!23 = !DILocalVariable(name: "B", arg: 2, scope: !17, file: !18, line: 1839, type: !7) 61!24 = !DILocalVariable(name: "C", scope: !17, file: !18, line: 1847, type: !7) 62