1; RUN: llc -mtriple x86_64-apple-macosx -O0 -filetype=obj -o %t_le.o %s 2; RUN: llvm-dwarfdump -v -debug-info %t_le.o | FileCheck %s 3 4; Produced at -O0 from: 5; struct bitfield { 6; int a : 2; 7; int b : 32; 8; int c : 1; 9; int d : 28; 10; }; 11; struct bitfield b; 12 13; Note that DWARF 2 counts bit offsets backwards from the high end of 14; the storage unit to the high end of the bit field. 15 16; CHECK: DW_TAG_member 17; CHECK-NEXT: DW_AT_name{{.*}}"a" 18; CHECK-NOT: DW_TAG_member 19; CHECK: DW_AT_byte_size {{.*}} (0x04) 20; CHECK-NEXT: DW_AT_bit_size {{.*}} (0x02) 21; CHECK-NEXT: DW_AT_bit_offset {{.*}} (0x1e) 22; CHECK-NEXT: DW_AT_data_member_location {{.*}} (DW_OP_plus_uconst 0x0) 23 24; CHECK: DW_TAG_member 25; CHECK-NEXT: DW_AT_name{{.*}}"b" 26; CHECK-NOT: DW_TAG_member 27; CHECK: DW_AT_data_member_location {{.*}} (DW_OP_plus_uconst 0x4) 28 29; CHECK: DW_TAG_member 30; CHECK-NEXT: DW_AT_name{{.*}}"c" 31; CHECK-NOT: DW_TAG_member 32; CHECK: DW_AT_byte_size {{.*}} (0x04) 33; CHECK-NEXT: DW_AT_bit_size {{.*}} (0x01) 34; CHECK-NEXT: DW_AT_bit_offset {{.*}} (0x1f) 35; CHECK: DW_AT_data_member_location {{.*}} (DW_OP_plus_uconst 0x8) 36 37; CHECK: DW_TAG_member 38; CHECK-NEXT: DW_AT_name{{.*}}"d" 39; CHECK-NOT: DW_TAG_member 40; CHECK: DW_AT_byte_size {{.*}} (0x04) 41; CHECK-NEXT: DW_AT_bit_size {{.*}} (0x1c) 42; CHECK-NEXT: DW_AT_bit_offset {{.*}} (0x03) 43; CHECK-NEXT: DW_AT_data_member_location {{.*}} (DW_OP_plus_uconst 0x8) 44 45; ModuleID = 'bitfields.c' 46source_filename = "test/DebugInfo/X86/bitfields.ll" 47target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128" 48target triple = "x86_64-apple-macosx" 49 50%struct.bitfield = type <{ i8, [3 x i8], i64 }> 51 52@b = common global %struct.bitfield zeroinitializer, align 4, !dbg !0 53 54!llvm.dbg.cu = !{!2} 55!llvm.module.flags = !{!13, !14, !15} 56!llvm.ident = !{!16} 57 58!0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression()) 59!1 = !DIGlobalVariable(name: "b", scope: !2, file: !3, line: 8, type: !6, isLocal: false, isDefinition: true) 60!2 = distinct !DICompileUnit(language: DW_LANG_C99, file: !3, producer: "clang version 3.7.0 (trunk 240548) (llvm/trunk 240554)", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !4, retainedTypes: !4, globals: !5, imports: !4) 61!3 = !DIFile(filename: "bitfields.c", directory: "/") 62!4 = !{} 63!5 = !{!0} 64!6 = !DICompositeType(tag: DW_TAG_structure_type, name: "bitfield", file: !3, line: 1, size: 96, elements: !7) 65!7 = !{!8, !10, !11, !12} 66!8 = !DIDerivedType(tag: DW_TAG_member, name: "a", scope: !6, file: !3, line: 2, baseType: !9, size: 2) 67!9 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed) 68!10 = !DIDerivedType(tag: DW_TAG_member, name: "b", scope: !6, file: !3, line: 3, baseType: !9, size: 32, offset: 32) 69!11 = !DIDerivedType(tag: DW_TAG_member, name: "c", scope: !6, file: !3, line: 4, baseType: !9, size: 1, offset: 64) 70!12 = !DIDerivedType(tag: DW_TAG_member, name: "d", scope: !6, file: !3, line: 5, baseType: !9, size: 28, offset: 65) 71!13 = !{i32 2, !"Dwarf Version", i32 2} 72!14 = !{i32 2, !"Debug Info Version", i32 3} 73!15 = !{i32 1, !"PIC Level", i32 2} 74!16 = !{!"clang version 3.7.0 (trunk 240548) (llvm/trunk 240554)"} 75 76