2bb5535b58
In situations when a submodule is extracted from big module (i.e. using CloneModule) a lot of debug info is copied via metadata nodes. Despite of the fact that part of that info is not linked to any instruction in extracted IR file, StripDeadDebugInfo pass doesn't drop them. Strengthen criteria for debug info that should be kept in a module: - Only those compile units are left that referenced by a subprogram debug info node that is attached to a function definition in the module or to an instruction in the module that belongs to an inlined function. Signed-off-by: Mikhail Lychkov <mikhail.lychkov@intel.com> Differential Revision: https://reviews.llvm.org/D122163
44 lines
2.6 KiB
LLVM
44 lines
2.6 KiB
LLVM
; This test checks that strip-dead-debug-info pass deletes debug compile units
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; if functions from those units are absent in that module.
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; RUN: opt -passes='strip-dead-debug-info,verify' %s -S | FileCheck %s
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; CHECK: !llvm.dbg.cu = !{!{{[0-9]+}}, !{{[0-9]+}}}
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; CHECK-COUNT-2: !DICompileUnit
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;target datalayout = "e-i64:64-v16:16-v24:32-v32:32-v48:64-v96:128-v192:256-v256:256-v512:512-v1024:1024-n8:16:32:64"
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;target triple = "spir64-unknown-unknown"
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; Function Attrs: nounwind
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define void @dev_func1() #0 !dbg !13 {
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ret void, !dbg !14
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}
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; Function Attrs: nounwind
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define void @dev_func2() #0 !dbg !15 {
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ret void, !dbg !16
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}
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attributes #0 = { nounwind }
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!llvm.dbg.cu = !{!0, !3, !5}
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!llvm.module.flags = !{!12}
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!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus_14, file: !1, producer: "clang", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, imports: !2, splitDebugInlining: false, nameTableKind: None)
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!1 = !DIFile(filename: "dev_func1.cpp", directory: "/home/user/test")
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!2 = !{}
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!3 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus_14, file: !4, producer: "clang", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, imports: !2, splitDebugInlining: false, nameTableKind: None)
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!4 = !DIFile(filename: "dev_func2.cpp", directory: "/home/user/test")
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!5 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus_14, file: !6, producer: "clang", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, retainedTypes: !2, imports: !7, splitDebugInlining: false, nameTableKind: None)
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!6 = !DIFile(filename: "dev_func3.cpp", directory: "/home/user/test")
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!7 = !{!8}
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!8 = !DIImportedEntity(tag: DW_TAG_imported_declaration, scope: !6, entity: !9, file: !6, line: 129)
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!9 = distinct !DISubprogram(name: "dev_func3", linkageName: "dev_func3", scope: !6, file: !6, line: 96, type: !10, scopeLine: 96, flags: DIFlagPrototyped, spFlags: DISPFlagLocalToUnit | DISPFlagDefinition, unit: !5, retainedNodes: !2)
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!10 = !DISubroutineType(types: !11)
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!11 = !{null}
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!12 = !{i32 2, !"Debug Info Version", i32 3}
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!13 = distinct !DISubprogram(name: "dev_func1", linkageName: "dev_func1", scope: !1, file: !1, line: 22, type: !10, scopeLine: 22, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition, unit: !0, retainedNodes: !2)
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!14 = !DILocation(line: 29, column: 5, scope: !13)
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!15 = distinct !DISubprogram(name: "dev_func2", linkageName: "dev_func2", scope: !4, file: !4, line: 22, type: !10, scopeLine: 22, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition, unit: !3, retainedNodes: !2)
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!16 = !DILocation(line: 29, column: 5, scope: !15)
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