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1RUN: rm -rf %t && split-file %s %t && cd %t2RUN: llc a.ll -o a.o -filetype=obj --split-dwarf-output=a.dwo --split-dwarf-file=a.dwo3RUN: llc b.ll -o b.o -filetype=obj --split-dwarf-output=b.dwo --split-dwarf-file=b.dwo4RUN: llc c.ll -o c.o -filetype=obj --split-dwarf-output=c.dwo --split-dwarf-file=c.dwo5RUN: llvm-dwp a.dwo b.dwo -o ab.dwp6RUN: llvm-dwp c.dwo ab.dwp -o merged.dwp7RUN: llvm-dwarfdump -v merged.dwp | FileCheck --check-prefix=CHECK %s8 9 10CHECK-LABEL: .debug_str_offsets.dwo contents:11CHECK: Contribution size = 32, Format = DWARF32, Version = 512CHECK: 0x00000008: 00000000 "_Z1cv"13CHECK: 0x0000000c: 00000006 "c"14CHECK: 0x00000010: 00000008 "int"15CHECK: 0x00000014: 0000000c "baz"16CHECK: 0x00000018: 00000010 ""17CHECK: 0x0000001c: 00000011 "c.cpp"18CHECK: 0x00000020: 00000017 "c.dwo"19CHECK: Contribution size = 24, Format = DWARF32, Version = 520CHECK: 0x0000002c: 0000001d "a"21CHECK: 0x00000030: 0000001f "foo"22CHECK: 0x00000034: 00000010 ""23CHECK: 0x00000038: 00000023 "a.cpp"24CHECK: 0x0000003c: 00000029 "a.dwo"25CHECK: Contribution size = 28, Format = DWARF32, Version = 526CHECK: 0x00000048: 0000002f "_Z1b3bar"27CHECK: 0x0000004c: 00000038 "b"28CHECK: 0x00000050: 0000003a "bar"29CHECK: 0x00000054: 00000010 ""30CHECK: 0x00000058: 0000003e "b.cpp"31CHECK: 0x0000005c: 00000044 "b.dwo"32;--- a.cpp33 struct foo { };34 foo a;35;--- b.cpp36 struct bar { };37 void b(bar) {38 }39;--- c.cpp40 typedef int baz;41 baz c() {42 }43;--- gen44clang --target=x86_64-linux -g3 -S -emit-llvm -gsplit-dwarf a.cpp -o -45echo '#--- b.ll'46clang --target=x86_64-linux -g3 -S -emit-llvm -gsplit-dwarf b.cpp -o -47echo '#--- c.ll'48clang --target=x86_64-linux -g3 -S -emit-llvm -gsplit-dwarf c.cpp -o -49;--- a.ll50; ModuleID = 'a.cpp'51source_filename = "a.cpp"52target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128"53target triple = "x86_64-unknown-linux"54 55%struct.foo = type { i8 }56 57@a = dso_local global %struct.foo zeroinitializer, align 1, !dbg !058 59!llvm.dbg.cu = !{!2}60!llvm.module.flags = !{!7, !8, !9, !10, !11, !12, !13}61 62!0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression())63!1 = distinct !DIGlobalVariable(name: "a", scope: !2, file: !3, line: 2, type: !5, isLocal: false, isDefinition: true)64!2 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus_14, file: !3, isOptimized: false, runtimeVersion: 0, splitDebugFilename: "a.dwo", emissionKind: FullDebug, globals: !4, splitDebugInlining: false, nameTableKind: GNU)65!3 = !DIFile(filename: "a.cpp", directory: "/proc/self/cwd", checksumkind: CSK_MD5, checksum: "394299a94a96cb48c0c9c95d7baf01f5")66!4 = !{!0}67!5 = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "foo", file: !3, line: 1, size: 8, flags: DIFlagTypePassByValue, elements: !6, identifier: "_ZTS3foo")68!6 = !{}69!7 = !{i32 7, !"Dwarf Version", i32 5}70!8 = !{i32 2, !"Debug Info Version", i32 3}71!9 = !{i32 1, !"wchar_size", i32 4}72!10 = !{i32 8, !"PIC Level", i32 2}73!11 = !{i32 7, !"PIE Level", i32 2}74!12 = !{i32 7, !"uwtable", i32 2}75!13 = !{i32 7, !"frame-pointer", i32 2}76#--- b.ll77; ModuleID = 'b.cpp'78source_filename = "b.cpp"79target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128"80target triple = "x86_64-unknown-linux"81 82%struct.bar = type { i8 }83 84; Function Attrs: mustprogress noinline nounwind optnone uwtable85define dso_local void @_Z1b3bar() #0 !dbg !9 {86 %1 = alloca %struct.bar, align 187 call void @llvm.dbg.declare(metadata ptr %1, metadata !14, metadata !DIExpression()), !dbg !1588 ret void, !dbg !1689}90 91; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)92declare void @llvm.dbg.declare(metadata, metadata, metadata) #193 94attributes #0 = { mustprogress noinline nounwind optnone uwtable "frame-pointer"="all" "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }95attributes #1 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }96 97!llvm.dbg.cu = !{!0}98!llvm.module.flags = !{!2, !3, !4, !5, !6, !7, !8}99 100!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus_14, file: !1, isOptimized: false, runtimeVersion: 0, splitDebugFilename: "b.dwo", emissionKind: FullDebug, splitDebugInlining: false, nameTableKind: GNU)101!1 = !DIFile(filename: "b.cpp", directory: "/proc/self/cwd", checksumkind: CSK_MD5, checksum: "8195382ac12baa5edfe47e2e4725f4a7")102!2 = !{i32 7, !"Dwarf Version", i32 5}103!3 = !{i32 2, !"Debug Info Version", i32 3}104!4 = !{i32 1, !"wchar_size", i32 4}105!5 = !{i32 8, !"PIC Level", i32 2}106!6 = !{i32 7, !"PIE Level", i32 2}107!7 = !{i32 7, !"uwtable", i32 2}108!8 = !{i32 7, !"frame-pointer", i32 2}109!9 = distinct !DISubprogram(name: "b", linkageName: "_Z1b3bar", scope: !1, file: !1, line: 2, type: !10, scopeLine: 2, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition, unit: !0, retainedNodes: !13)110!10 = !DISubroutineType(types: !11)111!11 = !{null, !12}112!12 = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "bar", file: !1, line: 1, size: 8, flags: DIFlagTypePassByValue, elements: !13, identifier: "_ZTS3bar")113!13 = !{}114!14 = !DILocalVariable(arg: 1, scope: !9, file: !1, line: 2, type: !12)115!15 = !DILocation(line: 2, column: 13, scope: !9)116!16 = !DILocation(line: 3, column: 3, scope: !9)117#--- c.ll118; ModuleID = 'c.cpp'119source_filename = "c.cpp"120target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128"121target triple = "x86_64-unknown-linux"122 123; Function Attrs: mustprogress noinline nounwind optnone uwtable124define dso_local noundef i32 @_Z1cv() #0 !dbg !9 {125 call void @llvm.trap(), !dbg !14126 unreachable, !dbg !14127}128 129; Function Attrs: cold noreturn nounwind memory(inaccessiblemem: write)130declare void @llvm.trap() #1131 132attributes #0 = { mustprogress noinline nounwind optnone uwtable "frame-pointer"="all" "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }133attributes #1 = { cold noreturn nounwind memory(inaccessiblemem: write) }134 135!llvm.dbg.cu = !{!0}136!llvm.module.flags = !{!2, !3, !4, !5, !6, !7, !8}137 138!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus_14, file: !1, isOptimized: false, runtimeVersion: 0, splitDebugFilename: "c.dwo", emissionKind: FullDebug, splitDebugInlining: false, nameTableKind: GNU)139!1 = !DIFile(filename: "c.cpp", directory: "/proc/self/cwd", checksumkind: CSK_MD5, checksum: "e508eeb01e2e608fe8713f9132696ef5")140!2 = !{i32 7, !"Dwarf Version", i32 5}141!3 = !{i32 2, !"Debug Info Version", i32 3}142!4 = !{i32 1, !"wchar_size", i32 4}143!5 = !{i32 8, !"PIC Level", i32 2}144!6 = !{i32 7, !"PIE Level", i32 2}145!7 = !{i32 7, !"uwtable", i32 2}146!8 = !{i32 7, !"frame-pointer", i32 2}147!9 = distinct !DISubprogram(name: "c", linkageName: "_Z1cv", scope: !1, file: !1, line: 2, type: !10, scopeLine: 2, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition, unit: !0)148!10 = !DISubroutineType(types: !11)149!11 = !{!12}150!12 = !DIDerivedType(tag: DW_TAG_typedef, name: "baz", file: !1, line: 1, baseType: !13)151!13 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)152!14 = !DILocation(line: 2, column: 11, scope: !9)153