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74a1319066
When the only use of a CU is for a subprogram that's only emitted into the using CU (to avoid cross-CU references in DWO files), avoid creating that CU at all. Reapply of r304111 after adding a triple to the test and moving it to the X86 directory. llvm-svn: 304129
55 lines
2.5 KiB
LLVM
55 lines
2.5 KiB
LLVM
; RUN: %llc_dwarf -split-dwarf-file=foo.dwo %s -filetype=obj -o - | llvm-dwarfdump -debug-dump=info - | FileCheck %s
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; Created from:
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; a.cpp:
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; void f1();
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; inline __attribute__((always_inline)) __attribute__((used)) void f2() { f1(); }
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; b.cpp:
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; void f2();
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; void f3() {
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; f2();
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; }
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; $ clang++ -fno-split-dwarf-inlining {a,b}.cpp -emit-llvm -S -g
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; $ llvm-link {a,b}.ll -S -o ab.ll
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; Then strip out the @llvm.used global, so no out of line definition of 'f2'
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; will be emitted. This emulates something more like the available_externally
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; import performed by ThinLTO.
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; CHECK: Compile Unit
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; CHECK-NOT: Compile Unit
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target triple = "x86_64-pc-linux"
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declare void @_Z2f1v()
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; Function Attrs: noinline norecurse uwtable
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define i32 @main() !dbg !9 {
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entry:
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call void @_Z2f1v(), !dbg !13
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ret i32 0, !dbg !18
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}
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!llvm.dbg.cu = !{!0, !3}
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!llvm.ident = !{!5, !5}
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!llvm.module.flags = !{!6, !7, !8}
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!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, producer: "clang version 5.0.0 (trunk 304054) (llvm/trunk 304080)", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, splitDebugInlining: false)
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!1 = !DIFile(filename: "a.cpp", directory: "/usr/local/google/home/blaikie/dev/scratch")
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!2 = !{}
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!3 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !4, producer: "clang version 5.0.0 (trunk 304054) (llvm/trunk 304080)", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, splitDebugInlining: false)
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!4 = !DIFile(filename: "b.cpp", directory: "/usr/local/google/home/blaikie/dev/scratch")
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!5 = !{!"clang version 5.0.0 (trunk 304054) (llvm/trunk 304080)"}
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!6 = !{i32 2, !"Dwarf Version", i32 4}
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!7 = !{i32 2, !"Debug Info Version", i32 3}
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!8 = !{i32 1, !"wchar_size", i32 4}
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!9 = distinct !DISubprogram(name: "main", scope: !4, file: !4, line: 2, type: !10, isLocal: false, isDefinition: true, scopeLine: 2, flags: DIFlagPrototyped, isOptimized: false, unit: !3, variables: !2)
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!10 = !DISubroutineType(types: !11)
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!11 = !{!12}
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!12 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
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!13 = !DILocation(line: 2, column: 73, scope: !14, inlinedAt: !17)
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!14 = distinct !DISubprogram(name: "f2", linkageName: "_Z2f2v", scope: !1, file: !1, line: 2, type: !15, isLocal: false, isDefinition: true, scopeLine: 2, flags: DIFlagPrototyped, isOptimized: false, unit: !0, variables: !2)
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!15 = !DISubroutineType(types: !16)
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!16 = !{null}
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!17 = distinct !DILocation(line: 3, column: 3, scope: !9)
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!18 = !DILocation(line: 4, column: 1, scope: !9)
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