mirror of
https://github.com/RPCSX/llvm.git
synced 2024-12-28 07:05:11 +00:00
4eeaa0da04
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> git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@266446 91177308-0d34-0410-b5e6-96231b3b80d8
36 lines
1.7 KiB
LLVM
36 lines
1.7 KiB
LLVM
; RUN: llc %s -O0 -o /dev/null -mtriple=x86_64-apple-darwin
|
|
; PR 5197
|
|
; There is not any llvm instruction assocated with !5. The code generator
|
|
; should be able to handle this.
|
|
|
|
define void @bar() nounwind ssp {
|
|
entry:
|
|
%count_ = alloca i32, align 4 ; <i32*> [#uses=2]
|
|
br label %do.body, !dbg !0
|
|
|
|
do.body: ; preds = %entry
|
|
call void @llvm.dbg.declare(metadata i32* %count_, metadata !4, metadata !DIExpression()), !dbg !DILocation(scope: !5)
|
|
%conv = ptrtoint i32* %count_ to i32, !dbg !0 ; <i32> [#uses=1]
|
|
%call = call i32 @foo(i32 %conv) ssp, !dbg !0 ; <i32> [#uses=0]
|
|
br label %do.end, !dbg !0
|
|
|
|
do.end: ; preds = %do.body
|
|
ret void, !dbg !7
|
|
}
|
|
|
|
declare void @llvm.dbg.declare(metadata, metadata, metadata) nounwind readnone
|
|
|
|
declare i32 @foo(i32) ssp
|
|
|
|
!llvm.dbg.cu = !{!3}
|
|
!0 = !DILocation(line: 5, column: 2, scope: !1)
|
|
!1 = distinct !DILexicalBlock(line: 1, column: 1, file: null, scope: !2)
|
|
!2 = distinct !DISubprogram(name: "bar", linkageName: "bar", line: 4, isLocal: false, isDefinition: true, virtualIndex: 6, isOptimized: false, unit: !3, scope: !3)
|
|
!3 = distinct !DICompileUnit(language: DW_LANG_C99, producer: "clang 1.1", isOptimized: true, emissionKind: FullDebug, file: !8, retainedTypes: !9)
|
|
!4 = !DILocalVariable(name: "count_", line: 5, scope: !5, file: !3, type: !6)
|
|
!5 = distinct !DILexicalBlock(line: 1, column: 1, file: null, scope: !1)
|
|
!6 = !DIBasicType(tag: DW_TAG_base_type, name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
|
|
!7 = !DILocation(line: 6, column: 1, scope: !2)
|
|
!8 = !DIFile(filename: "genmodes.i", directory: "/Users/yash/Downloads")
|
|
!9 = !{i32 0}
|