mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-10-21 03:53:04 +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
74 lines
3.3 KiB
LLVM
74 lines
3.3 KiB
LLVM
; REQUIRES: object-emission
|
|
; RUN: %llc_dwarf -O0 -filetype=obj %s -o %t
|
|
; RUN: llvm-dwarfdump %t | FileCheck %s
|
|
|
|
; Check that we emit ranges for this CU since we have a function with and
|
|
; without debug info.
|
|
; Note: This depends upon the order of output in the .o file. Currently it's
|
|
; in order of the output to make sure that the CU has multiple ranges since
|
|
; there's a function in the middle. If they were together then it would have
|
|
; a single range and no DW_AT_ranges.
|
|
; CHECK: DW_TAG_compile_unit
|
|
; CHECK: DW_AT_ranges
|
|
; CHECK: DW_TAG_subprogram
|
|
; CHECK: DW_TAG_subprogram
|
|
|
|
; Function Attrs: nounwind uwtable
|
|
define i32 @b(i32 %c) #0 !dbg !5 {
|
|
entry:
|
|
%c.addr = alloca i32, align 4
|
|
store i32 %c, i32* %c.addr, align 4
|
|
call void @llvm.dbg.declare(metadata i32* %c.addr, metadata !13, metadata !DIExpression()), !dbg !14
|
|
%0 = load i32, i32* %c.addr, align 4, !dbg !14
|
|
%add = add nsw i32 %0, 1, !dbg !14
|
|
ret i32 %add, !dbg !14
|
|
}
|
|
|
|
; Function Attrs: nounwind uwtable
|
|
define i32 @a(i32 %b) #0 {
|
|
entry:
|
|
%b.addr = alloca i32, align 4
|
|
store i32 %b, i32* %b.addr, align 4
|
|
%0 = load i32, i32* %b.addr, align 4
|
|
%add = add nsw i32 %0, 1
|
|
ret i32 %add
|
|
}
|
|
|
|
; Function Attrs: nounwind readnone
|
|
declare void @llvm.dbg.declare(metadata, metadata, metadata) #1
|
|
|
|
; Function Attrs: nounwind uwtable
|
|
define i32 @d(i32 %e) #0 !dbg !10 {
|
|
entry:
|
|
%e.addr = alloca i32, align 4
|
|
store i32 %e, i32* %e.addr, align 4
|
|
call void @llvm.dbg.declare(metadata i32* %e.addr, metadata !15, metadata !DIExpression()), !dbg !16
|
|
%0 = load i32, i32* %e.addr, align 4, !dbg !16
|
|
%add = add nsw i32 %0, 1, !dbg !16
|
|
ret i32 %add, !dbg !16
|
|
}
|
|
|
|
attributes #0 = { nounwind uwtable "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
|
|
attributes #1 = { nounwind readnone }
|
|
|
|
!llvm.ident = !{!0, !0}
|
|
!llvm.dbg.cu = !{!1}
|
|
!llvm.module.flags = !{!11, !12}
|
|
|
|
!0 = !{!"clang version 3.5.0 (trunk 204164) (llvm/trunk 204183)"}
|
|
!1 = distinct !DICompileUnit(language: DW_LANG_C99, producer: "clang version 3.5.0 (trunk 204164) (llvm/trunk 204183)", isOptimized: false, emissionKind: FullDebug, file: !2, enums: !3, retainedTypes: !3, globals: !3, imports: !3)
|
|
!2 = !DIFile(filename: "b.c", directory: "/usr/local/google/home/echristo")
|
|
!3 = !{}
|
|
!5 = distinct !DISubprogram(name: "b", line: 1, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, unit: !1, scopeLine: 1, file: !2, scope: !6, type: !7, variables: !3)
|
|
!6 = !DIFile(filename: "b.c", directory: "/usr/local/google/home/echristo")
|
|
!7 = !DISubroutineType(types: !8)
|
|
!8 = !{!9, !9}
|
|
!9 = !DIBasicType(tag: DW_TAG_base_type, name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
|
|
!10 = distinct !DISubprogram(name: "d", line: 3, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, unit: !1, scopeLine: 3, file: !2, scope: !6, type: !7, variables: !3)
|
|
!11 = !{i32 2, !"Dwarf Version", i32 4}
|
|
!12 = !{i32 1, !"Debug Info Version", i32 3}
|
|
!13 = !DILocalVariable(name: "c", line: 1, arg: 1, scope: !5, file: !6, type: !9)
|
|
!14 = !DILocation(line: 1, scope: !5)
|
|
!15 = !DILocalVariable(name: "e", line: 3, arg: 1, scope: !10, file: !6, type: !9)
|
|
!16 = !DILocation(line: 3, scope: !10)
|