1; RUN: llvm-as %s -o %t.bc 2; RUN: llvm-as %p/Inputs/only-needed-debug-metadata.ll -o %t2.bc 3 4; Without -only-needed, we need to link in both DISubprogram. 5; RUN: llvm-link -S %t2.bc %t.bc | FileCheck %s 6; CHECK: distinct !DISubprogram(name: "foo" 7; CHECK: distinct !DISubprogram(name: "unused" 8 9; With -only-needed, we only need to link in foo's DISubprogram. 10; RUN: llvm-link -S -only-needed %t2.bc %t.bc | FileCheck %s -check-prefix=ONLYNEEDED 11; ONLYNEEDED: distinct !DISubprogram(name: "foo" 12; ONLYNEEDED-NOT: distinct !DISubprogram(name: "unused" 13 14source_filename = "test/Linker/only-needed-debug-metadata.ll" 15 16@X = global i32 5, !dbg !0 17@U = global i32 6, !dbg !6 18@U_linkonce = linkonce_odr hidden global i32 6 19 20define i32 @foo() !dbg !12 { 21 ret i32 7, !dbg !17 22} 23 24define i32 @unused() !dbg !18 { 25 ret i32 8, !dbg !21 26} 27 28!llvm.dbg.cu = !{!2} 29!llvm.module.flags = !{!9, !10} 30!llvm.ident = !{!11} 31 32!0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression()) 33!1 = !DIGlobalVariable(name: "X", scope: !2, file: !3, line: 1, type: !8, isLocal: false, isDefinition: true) 34!2 = distinct !DICompileUnit(language: DW_LANG_C99, file: !3, producer: "clang version 3.8.0 (trunk 251407) (llvm/trunk 251401)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !4, globals: !5) 35!3 = !DIFile(filename: "linkused2.c", directory: "/usr/local/google/home/tejohnson/llvm/tmp") 36!4 = !{} 37!5 = !{!0, !6} 38!6 = !DIGlobalVariableExpression(var: !7, expr: !DIExpression()) 39!7 = !DIGlobalVariable(name: "U", scope: !2, file: !3, line: 2, type: !8, isLocal: false, isDefinition: true) 40!8 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed) 41!9 = !{i32 2, !"Dwarf Version", i32 4} 42!10 = !{i32 2, !"Debug Info Version", i32 3} 43!11 = !{!"clang version 3.8.0 (trunk 251407) (llvm/trunk 251401)"} 44!12 = distinct !DISubprogram(name: "foo", scope: !3, file: !3, line: 4, type: !13, isLocal: false, isDefinition: true, scopeLine: 4, flags: DIFlagPrototyped, isOptimized: true, unit: !2, retainedNodes: !15) 45!13 = !DISubroutineType(types: !14) 46!14 = !{!8, !8} 47!15 = !{!16} 48!16 = !DILocalVariable(name: "x", arg: 1, scope: !12, file: !3, line: 4, type: !8) 49!17 = !DILocation(line: 4, column: 13, scope: !12) 50!18 = distinct !DISubprogram(name: "unused", scope: !3, file: !3, line: 8, type: !19, isLocal: false, isDefinition: true, scopeLine: 8, isOptimized: true, unit: !2, retainedNodes: !4) 51!19 = !DISubroutineType(types: !20) 52!20 = !{!8} 53!21 = !DILocation(line: 9, column: 3, scope: !18) 54 55