mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-11-24 03:33:20 +01:00
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
49 lines
1.8 KiB
LLVM
49 lines
1.8 KiB
LLVM
; REQUIRES: object-emission
|
|
|
|
; RUN: %llc_dwarf < %s -filetype=obj | llvm-dwarfdump -debug-dump=info - | FileCheck %s
|
|
|
|
; Test that a nodebug function (a function not appearing in the debug info IR
|
|
; metadata subprogram list) with DebugLocs on its IR doesn't cause crashes/does
|
|
; the right thing.
|
|
|
|
; Build with clang from the following:
|
|
; extern int i;
|
|
; inline __attribute__((always_inline)) void f1() {
|
|
; i = 3;
|
|
; }
|
|
;
|
|
; __attribute__((nodebug)) void f2() {
|
|
; f1();
|
|
; }
|
|
|
|
; Check that there's no DW_TAG_subprogram, not even for the 'f2' function.
|
|
; CHECK: DW_TAG_compile_unit
|
|
; CHECK-NOT: DW_TAG_subprogram
|
|
|
|
@i = external global i32
|
|
|
|
; Function Attrs: uwtable
|
|
define void @_Z2f2v() #0 {
|
|
entry:
|
|
store i32 3, i32* @i, align 4, !dbg !11
|
|
ret void
|
|
}
|
|
|
|
attributes #0 = { 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" }
|
|
|
|
!llvm.dbg.cu = !{!0}
|
|
!llvm.module.flags = !{!8, !9}
|
|
!llvm.ident = !{!10}
|
|
|
|
!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, producer: "clang version 3.5.0 ", isOptimized: false, emissionKind: FullDebug, file: !1, enums: !2, retainedTypes: !2, globals: !2, imports: !2)
|
|
!1 = !DIFile(filename: "nodebug.cpp", directory: "/tmp/dbginfo")
|
|
!2 = !{}
|
|
!4 = distinct !DISubprogram(name: "f1", linkageName: "_Z2f1v", line: 2, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, unit: !0, scopeLine: 2, file: !1, scope: !5, type: !6, variables: !2)
|
|
!5 = !DIFile(filename: "nodebug.cpp", directory: "/tmp/dbginfo")
|
|
!6 = !DISubroutineType(types: !7)
|
|
!7 = !{null}
|
|
!8 = !{i32 2, !"Dwarf Version", i32 4}
|
|
!9 = !{i32 2, !"Debug Info Version", i32 3}
|
|
!10 = !{!"clang version 3.5.0 "}
|
|
!11 = !DILocation(line: 3, scope: !4)
|