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1; DWARF linkage name attributes are optional; verify they are missing for2; PS4 triple or when tuning for SCE.3 4; RUN: llc -O0 -mtriple=x86_64-unknown-unknown < %s | FileCheck %s -check-prefix LINKAGE15; RUN: llc -O0 -mtriple=x86_64-unknown-unknown < %s | FileCheck %s -check-prefix LINKAGE26; RUN: llc -O0 -mtriple=x86_64-scei-ps4 < %s | FileCheck %s -check-prefix NOLINKAGE7; RUN: llc -O0 -mtriple=x86_64-unknown-unknown -debugger-tune=sce < %s | FileCheck %s -check-prefix NOLINKAGE8 9; $ clang++ -emit-llvm -S -g dwarf-linkage-names.cpp10; namespace test {11; int global_var;12; int bar() { return global_var; }13;};14 15; With linkage names, we get an attribute for the declaration (first) entry16; for the global variable, and one for the function.17 18; This assumes the variable will appear before the function.19; LINKAGE1: .section .debug_info20; LINKAGE1: DW_TAG_variable21; LINKAGE1-NOT: DW_TAG22; LINKAGE1: {{DW_AT_(MIPS_)?linkage_name}}23; LINKAGE1: DW_TAG_subprogram24; LINKAGE1-NOT: DW_TAG25; LINKAGE1: {{DW_AT_(MIPS_)?linkage_name}}26; LINKAGE1: .section27 28; Also verify we see the mangled names. We do this as a separate pass to29; avoid depending on the order of .debug_info and .debug_str sections.30 31; LINKAGE2-DAG: .asciz "_ZN4test10global_varE"32; LINKAGE2-DAG: .asciz "_ZN4test3barEv"33 34; Without linkage names, verify there aren't any linkage-name attributes,35; and no mangled names.36 37; NOLINKAGE-NOT: {{DW_AT_(MIPS_)?linkage_name}}38; NOLINKAGE-NOT: .asciz "_ZN4test10global_varE"39; NOLINKAGE-NOT: .asciz "_ZN4test3barEv"40 41source_filename = "test/DebugInfo/X86/dwarf-linkage-names.ll"42 43@_ZN4test10global_varE = global i32 0, align 4, !dbg !044 45; Function Attrs: nounwind uwtable46define i32 @_ZN4test3barEv() #0 !dbg !11 {47entry:48 %0 = load i32, ptr @_ZN4test10global_varE, align 4, !dbg !1449 ret i32 %0, !dbg !1550}51 52attributes #0 = { nounwind uwtable "disable-tail-calls"="false" "less-precise-fpmad"="false" "frame-pointer"="all" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+sse,+sse2" "use-soft-float"="false" }53 54!llvm.dbg.cu = !{!5}55!llvm.module.flags = !{!8, !9}56!llvm.ident = !{!10}57 58!0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression())59!1 = !DIGlobalVariable(name: "global_var", linkageName: "_ZN4test10global_varE", scope: !2, file: !3, line: 2, type: !4, isLocal: false, isDefinition: true)60!2 = !DINamespace(name: "test", scope: null)61!3 = !DIFile(filename: "dwarf-linkage-names.cpp", directory: "/home/probinson/projects/scratch")62!4 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed)63!5 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !3, producer: "clang version 3.8.0 (trunk 244662)", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !6, globals: !7)64!6 = !{}65!7 = !{!0}66!8 = !{i32 2, !"Dwarf Version", i32 4}67!9 = !{i32 2, !"Debug Info Version", i32 3}68!10 = !{!"clang version 3.8.0 (trunk 244662)"}69!11 = distinct !DISubprogram(name: "bar", linkageName: "_ZN4test3barEv", scope: !2, file: !3, line: 3, type: !12, isLocal: false, isDefinition: true, scopeLine: 3, flags: DIFlagPrototyped, isOptimized: false, unit: !5, retainedNodes: !6)70!12 = !DISubroutineType(types: !13)71!13 = !{!4}72!14 = !DILocation(line: 3, column: 21, scope: !11)73!15 = !DILocation(line: 3, column: 14, scope: !11)74 75