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Currently each Function points to a DISubprogram and DISubprogram has a scope field. For member functions the scope is a DICompositeType. DIScopes point to the DICompileUnit to facilitate type uniquing. Distinct DISubprograms (with isDefinition: true) are not part of the type hierarchy and cannot be uniqued. This change removes the subprograms list from DICompileUnit and instead adds a pointer to the owning compile unit to distinct DISubprograms. This would make it easy for ThinLTO to strip unneeded DISubprograms and their transitively referenced debug info. Motivation ---------- Materializing DISubprograms is currently the most expensive operation when doing a ThinLTO build of clang. We want the DISubprogram to be stored in a separate Bitcode block (or the same block as the function body) so we can avoid having to expensively deserialize all DISubprograms together with the global metadata. If a function has been inlined into another subprogram we need to store a reference the block containing the inlined subprogram. Attached to https://llvm.org/bugs/show_bug.cgi?id=27284 is a python script that updates LLVM IR testcases to the new format. http://reviews.llvm.org/D19034 <rdar://problem/25256815> llvm-svn: 266446
45 lines
2.2 KiB
LLVM
45 lines
2.2 KiB
LLVM
; Verify target-based defaults for "debugger tuning," and the ability to
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; override defaults.
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; We use existence of the debug_pubnames section to distinguish the GDB case,
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; and the apple_names section to distinguish the LLDB case. SCE has neither.
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; Verify defaults for various targets.
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; RUN: llc -mtriple=x86_64-scei-ps4 -filetype=obj < %s | llvm-readobj -sections - | FileCheck --check-prefix=SCE %s
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; RUN: llc -mtriple=x86_64-apple-darwin12 -filetype=obj < %s | llvm-readobj -sections - | FileCheck --check-prefix=LLDB %s
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; RUN: llc -mtriple=x86_64-pc-freebsd -filetype=obj < %s | llvm-readobj -sections - | FileCheck --check-prefix=GDB %s
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; RUN: llc -mtriple=x86_64-pc-linux -filetype=obj < %s | llvm-readobj -sections - | FileCheck --check-prefix=GDB %s
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; We can override defaults.
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; RUN: llc -mtriple=x86_64-scei-ps4 -filetype=obj -debugger-tune=gdb < %s | llvm-readobj -sections - | FileCheck --check-prefix=GDB %s
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; RUN: llc -mtriple=x86_64-pc-linux -filetype=obj -debugger-tune=lldb < %s | llvm-readobj -sections - | FileCheck --check-prefix=LLDB %s
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; RUN: llc -mtriple=x86_64-apple-darwin12 -filetype=obj -debugger-tune=sce < %s | llvm-readobj -sections - | FileCheck --check-prefix=SCE %s
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; GDB-NOT: apple_names
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; GDB: debug_pubnames
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; GDB-NOT: apple_names
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; LLDB-NOT: debug_pubnames
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; LLDB: apple_names
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; LLDB-NOT: debug_pubnames
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; SCE-NOT: debug_pubnames
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; SCE-NOT: apple_names
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@globalvar = global i32 0, align 4
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!6, !7}
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!llvm.ident = !{!8}
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!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, producer: "clang version 3.7.0 (trunk 238808)", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, retainedTypes: !2, globals: !3, imports: !2)
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!1 = !DIFile(filename: "debugger-tune.cpp", directory: "/home/probinson/projects/scratch")
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!2 = !{}
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!3 = !{!4}
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!4 = !DIGlobalVariable(name: "globalvar", scope: !0, file: !1, line: 1, type: !5, isLocal: false, isDefinition: true, variable: i32* @globalvar)
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!5 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
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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 = !{!"clang version 3.7.0 (trunk 238808)"}
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