mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-10-23 13:02:52 +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
3.0 KiB
LLVM
74 lines
3.0 KiB
LLVM
; RUN: llc -mtriple aarch64_be-gnu-linux -O0 -filetype=obj -o %t_be.o %s
|
|
; RUN: llvm-dwarfdump -debug-dump=info %t_be.o | FileCheck %s
|
|
|
|
; Produced at -O0 from:
|
|
; struct bitfield {
|
|
; int a : 2;
|
|
; int b : 32;
|
|
; int c : 1;
|
|
; int d : 28;
|
|
; };
|
|
; struct bitfield b;
|
|
|
|
; Note that DWARF 2 counts bit offsets backwards from the high end of
|
|
; the storage unit to the high end of the bit field.
|
|
|
|
; CHECK: DW_TAG_member
|
|
; CHECK-NEXT: DW_AT_name{{.*}}"a"
|
|
; CHECK-NOT: DW_TAG_member
|
|
; CHECK: DW_AT_byte_size {{.*}} (0x04)
|
|
; CHECK-NEXT: DW_AT_bit_size {{.*}} (0x02)
|
|
; CHECK-NEXT: DW_AT_bit_offset {{.*}} (0x00)
|
|
; CHECK-NEXT: DW_AT_data_member_location {{.*}} 00
|
|
|
|
; CHECK: DW_TAG_member
|
|
; CHECK-NEXT: DW_AT_name{{.*}}"b"
|
|
; CHECK-NOT: DW_TAG_member
|
|
; CHECK: DW_AT_data_member_location {{.*}} 04
|
|
|
|
; CHECK: DW_TAG_member
|
|
; CHECK-NEXT: DW_AT_name{{.*}}"c"
|
|
; CHECK-NOT: DW_TAG_member
|
|
; CHECK: DW_AT_byte_size {{.*}} (0x04)
|
|
; CHECK-NEXT: DW_AT_bit_size {{.*}} (0x01)
|
|
; CHECK-NEXT: DW_AT_bit_offset {{.*}} (0x00)
|
|
; CHECK-NEXT: DW_AT_data_member_location {{.*}} 08
|
|
|
|
; CHECK: DW_TAG_member
|
|
; CHECK-NEXT: DW_AT_name{{.*}}"d"
|
|
; CHECK-NOT: DW_TAG_member
|
|
; CHECK: DW_AT_byte_size {{.*}} (0x04)
|
|
; CHECK-NEXT: DW_AT_bit_size {{.*}} (0x1c)
|
|
; CHECK-NEXT: DW_AT_bit_offset {{.*}} (0x01)
|
|
; CHECK-NEXT: DW_AT_data_member_location {{.*}} 08
|
|
|
|
; ModuleID = 'bitfields.c'
|
|
target datalayout = "E-m:e-i64:64-i128:128-n32:64-S128"
|
|
target triple = "aarch64_be--linux-gnu"
|
|
|
|
%struct.bitfield = type <{ i8, [3 x i8], i64 }>
|
|
|
|
@b = common global %struct.bitfield zeroinitializer, align 4
|
|
|
|
!llvm.dbg.cu = !{!0}
|
|
!llvm.module.flags = !{!13, !14, !15}
|
|
!llvm.ident = !{!16}
|
|
|
|
!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 3.7.0 (trunk 240548) (llvm/trunk 240554)", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, retainedTypes: !2, globals: !3, imports: !2)
|
|
!1 = !DIFile(filename: "bitfields.c", directory: "/")
|
|
!2 = !{}
|
|
!3 = !{!4}
|
|
!4 = !DIGlobalVariable(name: "b", scope: !0, file: !5, line: 8, type: !6, isLocal: false, isDefinition: true, variable: %struct.bitfield* @b)
|
|
!5 = !DIFile(filename: "bitfields.c", directory: "/")
|
|
!6 = !DICompositeType(tag: DW_TAG_structure_type, name: "bitfield", file: !5, line: 1, size: 96, align: 32, elements: !7)
|
|
!7 = !{!8, !10, !11, !12}
|
|
!8 = !DIDerivedType(tag: DW_TAG_member, name: "a", scope: !6, file: !5, line: 2, baseType: !9, size: 2, align: 32)
|
|
!9 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
|
|
!10 = !DIDerivedType(tag: DW_TAG_member, name: "b", scope: !6, file: !5, line: 3, baseType: !9, size: 32, align: 32, offset: 32)
|
|
!11 = !DIDerivedType(tag: DW_TAG_member, name: "c", scope: !6, file: !5, line: 4, baseType: !9, size: 1, align: 32, offset: 64)
|
|
!12 = !DIDerivedType(tag: DW_TAG_member, name: "d", scope: !6, file: !5, line: 5, baseType: !9, size: 28, align: 32, offset: 65)
|
|
!13 = !{i32 2, !"Dwarf Version", i32 2}
|
|
!14 = !{i32 2, !"Debug Info Version", i32 3}
|
|
!15 = !{i32 1, !"PIC Level", i32 2}
|
|
!16 = !{!"clang version 3.7.0 (trunk 240548) (llvm/trunk 240554)"}
|