1; RUN: llc -mtriple=x86_64-pc-linux -filetype=obj -function-sections -o %t < %s 2; RUN: llvm-dwarfdump -v -debug-info -debug-loclists %t | FileCheck %s 3 4; CHECK: DW_TAG_variable 5; FIXME: Use DW_FORM_loclistx to reduce relocations 6; CHECK-NEXT: DW_AT_location [DW_FORM_sec_offset] (0x0000000c 7; CHECK-NEXT: [0x0000000000000000, 0x0000000000000003): DW_OP_consts +3, DW_OP_stack_value 8; CHECK-NEXT: [0x0000000000000003, 0x0000000000000004): DW_OP_consts +4, DW_OP_stack_value) 9; CHECK-NEXT: DW_AT_name {{.*}} "y" 10 11; CHECK: DW_TAG_variable 12; FIXME: Use DW_FORM_loclistx to reduce relocations 13; CHECK-NEXT: DW_AT_location [DW_FORM_sec_offset] (0x0000001d 14; CHECK-NEXT: Addr idx 0 (w/ length 3): DW_OP_consts +5, DW_OP_stack_value) 15; CHECK-NEXT: DW_AT_name {{.*}} "x" 16 17; CHECK: DW_TAG_variable 18; FIXME: Use DW_FORM_loclistx to reduce relocations 19; CHECK-NEXT: DW_AT_location [DW_FORM_sec_offset] (0x00000025 20; CHECK-NEXT: [0x0000000000000003, 0x0000000000000004): DW_OP_reg0 RAX) 21; CHECK-NEXT: DW_AT_name {{.*}} "r" 22 23; CHECK: .debug_loclists contents: 24; CHECK-NEXT: 0x00000000: locations list header: length = 0x00000029, version = 0x0005, addr_size = 0x08, seg_size = 0x00, offset_entry_count = 0x00000000 25 26; Don't use startx_length if there's more than one entry, because the shared 27; base address will be useful for both the range that does start at the start of 28; the function, and the one that doesn't. 29 30; CHECK-NEXT: 0x0000000c: 31; CHECK-NEXT: DW_LLE_base_addressx (0x0000000000000000) 32; CHECK-NEXT: DW_LLE_offset_pair (0x0000000000000000, 0x0000000000000003) 33; CHECK-NEXT: => [0x0000000000000000, 0x0000000000000003): DW_OP_consts +3, DW_OP_stack_value 34; CHECK-NEXT: DW_LLE_offset_pair (0x0000000000000003, 0x0000000000000004) 35; CHECK-NEXT: => [0x0000000000000003, 0x0000000000000004): DW_OP_consts +4, DW_OP_stack_value 36; CHECK-NEXT: DW_LLE_end_of_list () 37 38; Show that startx_length can be used when the address range starts at the start of the function. 39 40; CHECK: 0x0000001d: 41; CHECK-NEXT: DW_LLE_startx_length (0x0000000000000000, 0x0000000000000003) 42; CHECK-NEXT: => Addr idx 0 (w/ length 3): DW_OP_consts +5, DW_OP_stack_value 43; CHECK-NEXT: DW_LLE_end_of_list () 44 45; And use a base address when the range doesn't start at an existing/useful 46; address in the pool. 47 48; CHECK: 0x00000025: 49; CHECK-NEXT: DW_LLE_base_addressx (0x0000000000000000) 50; CHECK-NEXT: DW_LLE_offset_pair (0x0000000000000003, 0x0000000000000004) 51; CHECK-NEXT: => [0x0000000000000003, 0x0000000000000004): DW_OP_reg0 RAX 52; CHECK-NEXT: DW_LLE_end_of_list () 53 54; Built with clang -O3 -ffunction-sections from source: 55; 56; int f1(int i, int j) { 57; int x = 5; 58; int y = 3; 59; int r = i + j; 60; int undef; 61; x = undef; 62; y = 4; 63; return r; 64; } 65; void f2() { 66; } 67 68; Function Attrs: norecurse nounwind readnone uwtable 69define dso_local i32 @_Z2f1ii(i32 %i, i32 %j) local_unnamed_addr !dbg !7 { 70entry: 71 call void @llvm.dbg.value(metadata i32 %i, metadata !12, metadata !DIExpression()), !dbg !18 72 call void @llvm.dbg.value(metadata i32 %j, metadata !13, metadata !DIExpression()), !dbg !18 73 call void @llvm.dbg.value(metadata i32 5, metadata !14, metadata !DIExpression()), !dbg !18 74 call void @llvm.dbg.value(metadata i32 3, metadata !15, metadata !DIExpression()), !dbg !18 75 %add = add nsw i32 %j, %i, !dbg !19 76 call void @llvm.dbg.value(metadata i32 %add, metadata !16, metadata !DIExpression()), !dbg !18 77 call void @llvm.dbg.value(metadata i32 undef, metadata !14, metadata !DIExpression()), !dbg !18 78 call void @llvm.dbg.value(metadata i32 4, metadata !15, metadata !DIExpression()), !dbg !18 79 ret i32 %add, !dbg !20 80} 81 82; Function Attrs: norecurse nounwind readnone uwtable 83define dso_local void @_Z2f2v() local_unnamed_addr !dbg !21 { 84entry: 85 ret void, !dbg !24 86} 87 88; Function Attrs: nounwind readnone speculatable willreturn 89declare void @llvm.dbg.value(metadata, metadata, metadata) 90 91!llvm.dbg.cu = !{!0} 92!llvm.module.flags = !{!3, !4, !5} 93!llvm.ident = !{!6} 94 95!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus_14, file: !1, producer: "clang version 10.0.0 (trunk 374581) (llvm/trunk 374579)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, nameTableKind: None) 96!1 = !DIFile(filename: "loc2.cpp", directory: "/usr/local/google/home/blaikie/dev/scratch", checksumkind: CSK_MD5, checksum: "91e0069c680e2a63f4f885ec93f5d07e") 97!2 = !{} 98!3 = !{i32 2, !"Dwarf Version", i32 5} 99!4 = !{i32 2, !"Debug Info Version", i32 3} 100!5 = !{i32 1, !"wchar_size", i32 4} 101!6 = !{!"clang version 10.0.0 (trunk 374581) (llvm/trunk 374579)"} 102!7 = distinct !DISubprogram(name: "f1", linkageName: "_Z2f1ii", scope: !1, file: !1, line: 1, type: !8, scopeLine: 1, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !11) 103!8 = !DISubroutineType(types: !9) 104!9 = !{!10, !10, !10} 105!10 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed) 106!11 = !{!12, !13, !14, !15, !16, !17} 107!12 = !DILocalVariable(name: "i", arg: 1, scope: !7, file: !1, line: 1, type: !10) 108!13 = !DILocalVariable(name: "j", arg: 2, scope: !7, file: !1, line: 1, type: !10) 109!14 = !DILocalVariable(name: "x", scope: !7, file: !1, line: 2, type: !10) 110!15 = !DILocalVariable(name: "y", scope: !7, file: !1, line: 3, type: !10) 111!16 = !DILocalVariable(name: "r", scope: !7, file: !1, line: 4, type: !10) 112!17 = !DILocalVariable(name: "undef", scope: !7, file: !1, line: 5, type: !10) 113!18 = !DILocation(line: 0, scope: !7) 114!19 = !DILocation(line: 4, column: 13, scope: !7) 115!20 = !DILocation(line: 8, column: 3, scope: !7) 116!21 = distinct !DISubprogram(name: "f2", linkageName: "_Z2f2v", scope: !1, file: !1, line: 10, type: !22, scopeLine: 10, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !2) 117!22 = !DISubroutineType(types: !23) 118!23 = !{null} 119!24 = !DILocation(line: 11, column: 1, scope: !21) 120