mirror of
https://github.com/RPCS3/llvm.git
synced 2025-03-06 09:39:28 +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
38 lines
1.5 KiB
LLVM
38 lines
1.5 KiB
LLVM
; RUN: llc < %s -mtriple=xcore-unknown-unknown -O0 | FileCheck %s
|
|
|
|
; target datalayout = "e-m:e-p:32:32-i1:8:32-i8:8:32-i16:16:32-i64:32-f64:32-a:0:32-n32"
|
|
; target triple = "xcore"
|
|
|
|
; CHECK-LABEL: f
|
|
; CHECK: entsp 2
|
|
; ...the prologue...
|
|
; CHECK: .loc 1 2 0 prologue_end # test.c:2:0
|
|
; CHECK: add r0, r0, 1
|
|
; CHECK: retsp 2
|
|
define i32 @f(i32 %a) !dbg !4 {
|
|
entry:
|
|
%a.addr = alloca i32, align 4
|
|
store i32 %a, i32* %a.addr, align 4
|
|
call void @llvm.dbg.declare(metadata i32* %a.addr, metadata !11, metadata !DIExpression()), !dbg !12
|
|
%0 = load i32, i32* %a.addr, align 4, !dbg !12
|
|
%add = add nsw i32 %0, 1, !dbg !12
|
|
ret i32 %add, !dbg !12
|
|
}
|
|
|
|
declare void @llvm.dbg.declare(metadata, metadata, metadata)
|
|
|
|
!llvm.dbg.cu = !{!0}
|
|
!llvm.module.flags = !{!9, !10}
|
|
!0 = distinct !DICompileUnit(language: DW_LANG_C99, isOptimized: false, emissionKind: FullDebug, file: !1, enums: !2, retainedTypes: !2, globals: !2, imports: !2)
|
|
!1 = !DIFile(filename: "test.c", directory: "")
|
|
!2 = !{}
|
|
!4 = distinct !DISubprogram(name: "f", line: 2, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, unit: !0, scopeLine: 2, file: !1, scope: !1, type: !6, variables: !2)
|
|
!6 = !DISubroutineType(types: !7)
|
|
!7 = !{!8, !8}
|
|
!8 = !DIBasicType(tag: DW_TAG_base_type, name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
|
|
!9 = !{i32 2, !"Dwarf Version", i32 4}
|
|
!10 = !{i32 2, !"Debug Info Version", i32 3}
|
|
!11 = !DILocalVariable(name: "a", line: 2, arg: 1, scope: !4, file: !1, type: !8)
|
|
!12 = !DILocation(line: 2, scope: !4)
|
|
|