mirror of
https://github.com/RPCS3/llvm.git
synced 2025-01-24 19:44:49 +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
34 lines
1.5 KiB
LLVM
34 lines
1.5 KiB
LLVM
; RUN: llc -split-dwarf=Enable -mtriple=powerpc64-unknown-linux-gnu -O0 -filetype=asm < %s | FileCheck %s
|
|
|
|
; FIXME: add relocation and DWARF expression support to llvm-dwarfdump & use
|
|
; that here instead of raw assembly printing
|
|
|
|
; CHECK: debug_info.dwo
|
|
; 3 bytes of data in this DW_FORM_block1 representation of the location of 'tls'
|
|
; CHECK: .byte 3{{ *}}# DW_AT_location
|
|
; DW_OP_const_index (0xfx == 252) to refer to the debug_addr table
|
|
; CHECK-NEXT: .byte 252
|
|
; an index of zero into the debug_addr table
|
|
; CHECK-NEXT: .byte 0
|
|
; DW_OP_GNU_push_tls_address
|
|
; CHECK-NEXT: .byte 224
|
|
; check that the expected TLS address description is the first thing in the debug_addr section
|
|
; CHECK: debug_addr
|
|
; CHECK-NEXT: .Laddr_sec:
|
|
; CHECK-NEXT: .quad tls@DTPREL+32768
|
|
|
|
@tls = thread_local global i32 0, align 4
|
|
|
|
!llvm.dbg.cu = !{!0}
|
|
!llvm.module.flags = !{!7, !8}
|
|
|
|
!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, producer: "clang version 3.4 ", isOptimized: false, splitDebugFilename: "tls.dwo", emissionKind: FullDebug, file: !1, enums: !2, retainedTypes: !2, globals: !3, imports: !2)
|
|
!1 = !DIFile(filename: "tls.cpp", directory: "/tmp")
|
|
!2 = !{}
|
|
!3 = !{!4}
|
|
!4 = !DIGlobalVariable(name: "tls", line: 1, isLocal: false, isDefinition: true, scope: null, file: !5, type: !6, variable: i32* @tls)
|
|
!5 = !DIFile(filename: "tls.cpp", directory: "/tmp")
|
|
!6 = !DIBasicType(tag: DW_TAG_base_type, name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
|
|
!7 = !{i32 2, !"Dwarf Version", i32 3}
|
|
!8 = !{i32 1, !"Debug Info Version", i32 3}
|