mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-10-23 21:13:02 +02:00
fb3abba237
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
22 lines
1.1 KiB
LLVM
22 lines
1.1 KiB
LLVM
; RUN: llc %s -o %t -filetype=obj
|
|
; RUN: llvm-dwarfdump -debug-dump=line %t | FileCheck %s
|
|
|
|
target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"
|
|
target triple = "x86_64-unknown-linux-gnu"
|
|
|
|
!llvm.dbg.cu = !{!0}
|
|
!llvm.module.flags = !{!5}
|
|
|
|
!0 = distinct !DICompileUnit(language: DW_LANG_C99, producer: "clang version 3.1 (trunk 143523)", isOptimized: true, emissionKind: FullDebug, file: !4, enums: !2, retainedTypes: !7, globals: !2)
|
|
!2 = !{}
|
|
!3 = !DIFile(filename: "empty.c", directory: "/home/nlewycky")
|
|
!4 = !DIFile(filename: "empty.c", directory: "/home/nlewycky")
|
|
!6 = !DICompositeType(tag: DW_TAG_structure_type, name: "foo", line: 1, size: 8, align: 8, file: !4, elements: !2, identifier: "_ZTS3foo")
|
|
!7 = !{!6}
|
|
|
|
; The important part of the following check is that dir = #0.
|
|
; Dir Mod Time File Len File Name
|
|
; ---- ---------- ---------- ---------------------------
|
|
; CHECK: file_names[ 1] 0 0x00000000 0x00000000 empty.c
|
|
!5 = !{i32 1, !"Debug Info Version", i32 3}
|