maxjhandsome
/
llvm-project
forked from OSchip/llvm-project
1
0
Fork 0
Code Issues Pull Requests Packages Releases Wiki Activity
llvm-project/llvm/test/Linker/only-needed-debug-metadata.ll

49 lines
2.3 KiB
LLVM
Raw Normal View History

[ThinLTO/LTO] Don't link in unneeded metadata Summary: Third patch split out from http://reviews.llvm.org/D14752. Only map in needed DISubroutine metadata (imported or otherwise linked in functions and other DISubroutine referenced by inlined instructions). This is supported for ThinLTO, LTO and llvm-link --only-needed, with associated tests for each one. Depends on D14838. Reviewers: dexonsmith, joker.eph Subscribers: davidxl, llvm-commits, joker.eph Differential Revision: http://reviews.llvm.org/D14843 llvm-svn: 256003
2015-12-19 01:51:37 +08:00
; RUN: llvm-as %s -o %t.bc
; RUN: llvm-as %p/Inputs/only-needed-debug-metadata.ll -o %t2.bc
; Without -only-needed, we need to link in both DISubprogram.
; RUN: llvm-link -S %t2.bc %t.bc | FileCheck %s
; CHECK: distinct !DISubprogram(name: "foo"
; CHECK: distinct !DISubprogram(name: "unused"
; With -only-needed, we only need to link in foo's DISubprogram.
; RUN: llvm-link -S -only-needed %t2.bc %t.bc | FileCheck %s -check-prefix=ONLYNEEDED
; ONLYNEEDED: distinct !DISubprogram(name: "foo"
; ONLYNEEDED-NOT: distinct !DISubprogram(name: "unused"
DebugInfo: New metadata representation for global variables. This patch reverses the edge from DIGlobalVariable to GlobalVariable. This will allow us to more easily preserve debug info metadata when manipulating global variables. Fixes PR30362. A program for upgrading test cases is attached to that bug. Differential Revision: http://reviews.llvm.org/D20147 llvm-svn: 281284
2016-09-13 09:12:59 +08:00
@X = global i32 5, !dbg !14
@U = global i32 6, !dbg !15
[ThinLTO/LTO] Don't link in unneeded metadata Summary: Third patch split out from http://reviews.llvm.org/D14752. Only map in needed DISubroutine metadata (imported or otherwise linked in functions and other DISubroutine referenced by inlined instructions). This is supported for ThinLTO, LTO and llvm-link --only-needed, with associated tests for each one. Depends on D14838. Reviewers: dexonsmith, joker.eph Subscribers: davidxl, llvm-commits, joker.eph Differential Revision: http://reviews.llvm.org/D14843 llvm-svn: 256003
2015-12-19 01:51:37 +08:00
@U_linkonce = linkonce_odr hidden global i32 6
define i32 @foo() !dbg !4 {
ret i32 7, !dbg !20
}
define i32 @unused() !dbg !10 {
ret i32 8, !dbg !21
}
!llvm.dbg.cu = !{!0}
!llvm.module.flags = !{!16, !17}
!llvm.ident = !{!18}
[PR27284] Reverse the ownership between DICompileUnit and DISubprogram. 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
2016-04-15 23:57:41 +08:00
!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 3.8.0 (trunk 251407) (llvm/trunk 251401)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, globals: !13)
[ThinLTO/LTO] Don't link in unneeded metadata Summary: Third patch split out from http://reviews.llvm.org/D14752. Only map in needed DISubroutine metadata (imported or otherwise linked in functions and other DISubroutine referenced by inlined instructions). This is supported for ThinLTO, LTO and llvm-link --only-needed, with associated tests for each one. Depends on D14838. Reviewers: dexonsmith, joker.eph Subscribers: davidxl, llvm-commits, joker.eph Differential Revision: http://reviews.llvm.org/D14843 llvm-svn: 256003
2015-12-19 01:51:37 +08:00
!1 = !DIFile(filename: "linkused2.c", directory: "/usr/local/google/home/tejohnson/llvm/tmp")
!2 = !{}
[PR27284] Reverse the ownership between DICompileUnit and DISubprogram. 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
2016-04-15 23:57:41 +08:00
!4 = distinct !DISubprogram(name: "foo", scope: !1, file: !1, line: 4, type: !5, isLocal: false, isDefinition: true, scopeLine: 4, flags: DIFlagPrototyped, isOptimized: true, unit: !0, variables: !8)
[ThinLTO/LTO] Don't link in unneeded metadata Summary: Third patch split out from http://reviews.llvm.org/D14752. Only map in needed DISubroutine metadata (imported or otherwise linked in functions and other DISubroutine referenced by inlined instructions). This is supported for ThinLTO, LTO and llvm-link --only-needed, with associated tests for each one. Depends on D14838. Reviewers: dexonsmith, joker.eph Subscribers: davidxl, llvm-commits, joker.eph Differential Revision: http://reviews.llvm.org/D14843 llvm-svn: 256003
2015-12-19 01:51:37 +08:00
!5 = !DISubroutineType(types: !6)
!6 = !{!7, !7}
!7 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
!8 = !{!9}
!9 = !DILocalVariable(name: "x", arg: 1, scope: !4, file: !1, line: 4, type: !7)
[PR27284] Reverse the ownership between DICompileUnit and DISubprogram. 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
2016-04-15 23:57:41 +08:00
!10 = distinct !DISubprogram(name: "unused", scope: !1, file: !1, line: 8, type: !11, isLocal: false, isDefinition: true, scopeLine: 8, isOptimized: true, unit: !0, variables: !2)
[ThinLTO/LTO] Don't link in unneeded metadata Summary: Third patch split out from http://reviews.llvm.org/D14752. Only map in needed DISubroutine metadata (imported or otherwise linked in functions and other DISubroutine referenced by inlined instructions). This is supported for ThinLTO, LTO and llvm-link --only-needed, with associated tests for each one. Depends on D14838. Reviewers: dexonsmith, joker.eph Subscribers: davidxl, llvm-commits, joker.eph Differential Revision: http://reviews.llvm.org/D14843 llvm-svn: 256003
2015-12-19 01:51:37 +08:00
!11 = !DISubroutineType(types: !12)
!12 = !{!7}
!13 = !{!14, !15}
DebugInfo: New metadata representation for global variables. This patch reverses the edge from DIGlobalVariable to GlobalVariable. This will allow us to more easily preserve debug info metadata when manipulating global variables. Fixes PR30362. A program for upgrading test cases is attached to that bug. Differential Revision: http://reviews.llvm.org/D20147 llvm-svn: 281284
2016-09-13 09:12:59 +08:00
!14 = !DIGlobalVariable(name: "X", scope: !0, file: !1, line: 1, type: !7, isLocal: false, isDefinition: true)
!15 = !DIGlobalVariable(name: "U", scope: !0, file: !1, line: 2, type: !7, isLocal: false, isDefinition: true)
[ThinLTO/LTO] Don't link in unneeded metadata Summary: Third patch split out from http://reviews.llvm.org/D14752. Only map in needed DISubroutine metadata (imported or otherwise linked in functions and other DISubroutine referenced by inlined instructions). This is supported for ThinLTO, LTO and llvm-link --only-needed, with associated tests for each one. Depends on D14838. Reviewers: dexonsmith, joker.eph Subscribers: davidxl, llvm-commits, joker.eph Differential Revision: http://reviews.llvm.org/D14843 llvm-svn: 256003
2015-12-19 01:51:37 +08:00
!16 = !{i32 2, !"Dwarf Version", i32 4}
!17 = !{i32 2, !"Debug Info Version", i32 3}
!18 = !{!"clang version 3.8.0 (trunk 251407) (llvm/trunk 251401)"}
!19 = !DIExpression()
!20 = !DILocation(line: 4, column: 13, scope: !4)
!21 = !DILocation(line: 9, column: 3, scope: !10)