1; DWARF linkage name attributes are optional; verify they are missing for 2; PS4 triple or when tuning for SCE. 3 4; RUN: llc -O0 -mtriple=x86_64-unknown-unknown < %s | FileCheck %s -check-prefix LINKAGE1 5; RUN: llc -O0 -mtriple=x86_64-unknown-unknown < %s | FileCheck %s -check-prefix LINKAGE2 6; RUN: llc -O0 -mtriple=x86_64-scei-ps4 < %s | FileCheck %s -check-prefix NOLINKAGE 7; RUN: llc -O0 -mtriple=x86_64-unknown-unknown -debugger-tune=sce < %s | FileCheck %s -check-prefix NOLINKAGE 8 9; $ clang++ -emit-llvm -S -g dwarf-linkage-names.cpp 10; 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) entry 16; for the global variable, and one for the function. 17 18; This assumes the variable will appear before the function. 19; LINKAGE1: .section .debug_info 20; LINKAGE1: DW_TAG_variable 21; LINKAGE1-NOT: DW_TAG 22; LINKAGE1: {{DW_AT_(MIPS_)?linkage_name}} 23; LINKAGE1: DW_TAG_subprogram 24; LINKAGE1-NOT: DW_TAG 25; LINKAGE1: {{DW_AT_(MIPS_)?linkage_name}} 26; LINKAGE1: .section 27 28; Also verify we see the mangled names. We do this as a separate pass to 29; 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 41@_ZN4test10global_varE = global i32 0, align 4 42 43; Function Attrs: nounwind uwtable 44define i32 @_ZN4test3barEv() #0 !dbg !4 { 45entry: 46 %0 = load i32, i32* @_ZN4test10global_varE, align 4, !dbg !14 47 ret i32 %0, !dbg !15 48} 49 50attributes #0 = { nounwind uwtable "disable-tail-calls"="false" "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+sse,+sse2" "unsafe-fp-math"="false" "use-soft-float"="false" } 51 52!llvm.dbg.cu = !{!0} 53!llvm.module.flags = !{!11, !12} 54!llvm.ident = !{!13} 55 56!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, producer: "clang version 3.8.0 (trunk 244662)", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, globals: !9) 57!1 = !DIFile(filename: "dwarf-linkage-names.cpp", directory: "/home/probinson/projects/scratch") 58!2 = !{} 59!4 = distinct !DISubprogram(name: "bar", linkageName: "_ZN4test3barEv", scope: !5, file: !1, line: 3, type: !6, isLocal: false, isDefinition: true, scopeLine: 3, flags: DIFlagPrototyped, isOptimized: false, unit: !0, variables: !2) 60!5 = !DINamespace(name: "test", scope: null, file: !1, line: 1) 61!6 = !DISubroutineType(types: !7) 62!7 = !{!8} 63!8 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed) 64!9 = !{!10} 65!10 = !DIGlobalVariable(name: "global_var", linkageName: "_ZN4test10global_varE", scope: !5, file: !1, line: 2, type: !8, isLocal: false, isDefinition: true, variable: i32* @_ZN4test10global_varE) 66!11 = !{i32 2, !"Dwarf Version", i32 4} 67!12 = !{i32 2, !"Debug Info Version", i32 3} 68!13 = !{!"clang version 3.8.0 (trunk 244662)"} 69!14 = !DILocation(line: 3, column: 21, scope: !4) 70!15 = !DILocation(line: 3, column: 14, scope: !4) 71