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; RUN: llc -dwarf-version=5 -split-dwarf-file=foo.dwo -mtriple=x86_64-pc-linux -filetype=obj -function-sections -o %t < %s 5; RUN: llvm-dwarfdump -v -debug-info -debug-loclists %t | FileCheck %s --check-prefix=DWO 6 7; CHECK: DW_TAG_variable 8; CHECK-NEXT: DW_AT_location [DW_FORM_loclistx] (indexed (0x0) loclist = 0x00000018: 9; CHECK-NEXT: [0x0000000000000000, 0x0000000000000003) ".text._Z2f1ii": DW_OP_consts +3, DW_OP_stack_value 10; CHECK-NEXT: [0x0000000000000003, 0x0000000000000004) ".text._Z2f1ii": DW_OP_consts +4, DW_OP_stack_value) 11; CHECK-NEXT: DW_AT_name {{.*}} "y" 12 13; CHECK: DW_TAG_variable 14; CHECK-NEXT: DW_AT_location [DW_FORM_loclistx] (indexed (0x1) loclist = 0x00000029: 15; CHECK-NEXT: [0x0000000000000000, 0x0000000000000003) ".text._Z2f1ii": DW_OP_consts +5, DW_OP_stack_value) 16; CHECK-NEXT: DW_AT_name {{.*}} "x" 17 18; CHECK: DW_TAG_variable 19; CHECK-NEXT: DW_AT_location [DW_FORM_loclistx] (indexed (0x2) loclist = 0x00000031: 20; CHECK-NEXT: [0x0000000000000003, 0x0000000000000004) ".text._Z2f1ii": 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 = 0x00000035, format = DWARF32, version = 0x0005, addr_size = 0x08, seg_size = 0x00, offset_entry_count = 0x00000003 25 26; DWO: .debug_loclists.dwo contents: 27; DWO-NEXT: 0x00000000: locations list header: length = 0x00000035, format = DWARF32, version = 0x0005, addr_size = 0x08, seg_size = 0x00, offset_entry_count = 0x00000003 28 29; CHECK-NEXT: offsets: [ 30; CHECK-NEXT: 0x0000000c => 0x00000018 31; CHECK-NEXT: 0x0000001d => 0x00000029 32; CHECK-NEXT: 0x00000025 => 0x00000031 33; CHECK-NEXT: ] 34 35; Don't use startx_length if there's more than one entry, because the shared 36; base address will be useful for both the range that does start at the start of 37; the function, and the one that doesn't. 38 39; CHECK-NEXT: 0x00000018: 40; CHECK-NEXT: DW_LLE_base_addressx (0x0000000000000000) 41; CHECK-NEXT: DW_LLE_offset_pair (0x0000000000000000, 0x0000000000000003): DW_OP_consts +3, DW_OP_stack_value 42; CHECK-NEXT: DW_LLE_offset_pair (0x0000000000000003, 0x0000000000000004): DW_OP_consts +4, DW_OP_stack_value 43; CHECK-NEXT: DW_LLE_end_of_list () 44 45; Show that startx_length can be used when the address range starts at the start of the function. 46 47; CHECK: 0x00000029: 48; CHECK-NEXT: DW_LLE_startx_length (0x0000000000000000, 0x0000000000000003): DW_OP_consts +5, DW_OP_stack_value 49; CHECK-NEXT: DW_LLE_end_of_list () 50 51; And use a base address when the range doesn't start at an existing/useful 52; address in the pool. 53 54; CHECK: 0x00000031: 55; CHECK-NEXT: DW_LLE_base_addressx (0x0000000000000000) 56; CHECK-NEXT: DW_LLE_offset_pair (0x0000000000000003, 0x0000000000000004): DW_OP_reg0 RAX 57; CHECK-NEXT: DW_LLE_end_of_list () 58 59; Built with clang -O3 -ffunction-sections from source: 60; 61; int f1(int i, int j) { 62; int x = 5; 63; int y = 3; 64; int r = i + j; 65; int undef; 66; x = undef; 67; y = 4; 68; return r; 69; } 70; void f2() { 71; } 72 73; Function Attrs: norecurse nounwind readnone uwtable 74define dso_local i32 @_Z2f1ii(i32 %i, i32 %j) local_unnamed_addr !dbg !7 { 75entry: 76 call void @llvm.dbg.value(metadata i32 %i, metadata !12, metadata !DIExpression()), !dbg !18 77 call void @llvm.dbg.value(metadata i32 %j, metadata !13, metadata !DIExpression()), !dbg !18 78 call void @llvm.dbg.value(metadata i32 5, metadata !14, metadata !DIExpression()), !dbg !18 79 call void @llvm.dbg.value(metadata i32 3, metadata !15, metadata !DIExpression()), !dbg !18 80 %add = add nsw i32 %j, %i, !dbg !19 81 call void @llvm.dbg.value(metadata i32 %add, metadata !16, metadata !DIExpression()), !dbg !18 82 call void @llvm.dbg.value(metadata i32 undef, metadata !14, metadata !DIExpression()), !dbg !18 83 call void @llvm.dbg.value(metadata i32 4, metadata !15, metadata !DIExpression()), !dbg !18 84 ret i32 %add, !dbg !20 85} 86 87; Function Attrs: norecurse nounwind readnone uwtable 88define dso_local void @_Z2f2v() local_unnamed_addr !dbg !21 { 89entry: 90 ret void, !dbg !24 91} 92 93; Function Attrs: nounwind readnone speculatable willreturn 94declare void @llvm.dbg.value(metadata, metadata, metadata) 95 96!llvm.dbg.cu = !{!0} 97!llvm.module.flags = !{!3, !4, !5} 98!llvm.ident = !{!6} 99 100!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) 101!1 = !DIFile(filename: "loc2.cpp", directory: "/usr/local/google/home/blaikie/dev/scratch", checksumkind: CSK_MD5, checksum: "91e0069c680e2a63f4f885ec93f5d07e") 102!2 = !{} 103!3 = !{i32 2, !"Dwarf Version", i32 5} 104!4 = !{i32 2, !"Debug Info Version", i32 3} 105!5 = !{i32 1, !"wchar_size", i32 4} 106!6 = !{!"clang version 10.0.0 (trunk 374581) (llvm/trunk 374579)"} 107!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) 108!8 = !DISubroutineType(types: !9) 109!9 = !{!10, !10, !10} 110!10 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed) 111!11 = !{!12, !13, !14, !15, !16, !17} 112!12 = !DILocalVariable(name: "i", arg: 1, scope: !7, file: !1, line: 1, type: !10) 113!13 = !DILocalVariable(name: "j", arg: 2, scope: !7, file: !1, line: 1, type: !10) 114!14 = !DILocalVariable(name: "x", scope: !7, file: !1, line: 2, type: !10) 115!15 = !DILocalVariable(name: "y", scope: !7, file: !1, line: 3, type: !10) 116!16 = !DILocalVariable(name: "r", scope: !7, file: !1, line: 4, type: !10) 117!17 = !DILocalVariable(name: "undef", scope: !7, file: !1, line: 5, type: !10) 118!18 = !DILocation(line: 0, scope: !7) 119!19 = !DILocation(line: 4, column: 13, scope: !7) 120!20 = !DILocation(line: 8, column: 3, scope: !7) 121!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) 122!22 = !DISubroutineType(types: !23) 123!23 = !{null} 124!24 = !DILocation(line: 11, column: 1, scope: !21) 125