; RUN: llc -filetype=asm -mtriple=x86_64-pc-linux-gnu %s -o - -use-dwarf-ranges-base-address-specifier | FileCheck --check-prefix=COMMON --check-prefix=BASE %s ; RUN: llc -filetype=asm -mtriple=x86_64-pc-linux-gnu %s -o - | FileCheck --check-prefix=COMMON --check-prefix=NOBASE %s ; RUN: llc -filetype=asm -mtriple=x86_64-pc-linux-gnu %s -o - -dwarf-version 5 | FileCheck --check-prefix=DWARF5 %s ; Group ranges in a range list that apply to the same section and use a base ; address selection entry to reduce the number of relocations to one reloc per ; section per range list. DWARF5 debug_rnglist (with *x variants) are more ; efficient than this in terms of relocations, but it's still better than one ; reloc per entry in a range list. ; This is an object/executable size tradeoff - shrinking objects, but growing ; the linked executable. In one large binary tested, total object size (not just ; debug info) shrank by 16%, entirely relocation entries. Linked executable ; grew by 4%. This was with compressed debug info in the objects, uncompressed ; in the linked executable. Without compression in the objects, the win would be ; smaller (the growth of debug_ranges itself would be more significant). ; COMMON: {{^.Ldebug_ranges0}} ; COMMON-NEXT: .quad .Lfunc_begin0 ; COMMON-NEXT: .quad .Lfunc_end0 ; BASE-NEXT: .quad -1 ; BASE-NEXT: .quad .Lfunc_begin1 ; BASE-NEXT: .quad .Lfunc_begin1-.Lfunc_begin1 ; BASE-NEXT: .quad .Lfunc_end1-.Lfunc_begin1 ; BASE-NEXT: .quad .Lfunc_begin3-.Lfunc_begin1 ; BASE-NEXT: .quad .Lfunc_end3-.Lfunc_begin1 ; BASE-NEXT: .quad -1 ; BASE-NEXT: .quad 0 ; NOBASE-NEXT: .quad .Lfunc_begin1 ; NOBASE-NEXT: .quad .Lfunc_end1 ; NOBASE-NEXT: .quad .Lfunc_begin3 ; NOBASE-NEXT: .quad .Lfunc_end3 ; COMMON-NEXT: .quad .Lfunc_begin4 ; COMMON-NEXT: .quad .Lfunc_end4 ; COMMON-NEXT: .quad .Lfunc_begin5 ; COMMON-NEXT: .quad .Lfunc_end5 ; COMMON-NEXT: .quad 0 ; COMMON-NEXT: .quad 0 ; DWARF5: {{^.Ldebug_ranges0}} ; DWARF5-NEXT: # DW_RLE_start_length ; DWARF5-NEXT: .quad .Lfunc_begin0 # start ; DWARF5-NEXT: .uleb128 .Lfunc_end0-.Lfunc_begin0 # length ; DWARF5-NEXT: # DW_RLE_base_address ; DWARF5-NEXT: .quad .Lfunc_begin1 # base address ; DWARF5-NEXT: # DW_RLE_offset_pair ; DWARF5-NEXT: .uleb128 .Lfunc_begin1-.Lfunc_begin1 # starting offset ; DWARF5-NEXT: .uleb128 .Lfunc_end1-.Lfunc_begin1 # ending offset ; DWARF5-NEXT: # DW_RLE_offset_pair ; DWARF5-NEXT: .uleb128 .Lfunc_begin3-.Lfunc_begin1 # starting offset ; DWARF5-NEXT: .uleb128 .Lfunc_end3-.Lfunc_begin1 # ending offset ; DWARF5-NEXT: # DW_RLE_start_length ; DWARF5-NEXT: .quad .Lfunc_begin4 # start ; DWARF5-NEXT: .uleb128 .Lfunc_end4-.Lfunc_begin4 # length ; DWARF5-NEXT: # DW_RLE_start_length ; DWARF5-NEXT: .quad .Lfunc_begin5 # start ; DWARF5-NEXT: .uleb128 .Lfunc_end5-.Lfunc_begin5 # length ; DWARF5-NEXT: # DW_RLE_end_of_list ; Function Attrs: noinline nounwind optnone uwtable define void @_Z2f1v() #0 section "a" !dbg !7 { entry: ret void, !dbg !10 } ; Function Attrs: noinline nounwind optnone uwtable define void @_Z2f2v() #0 section "b" !dbg !11 { entry: ret void, !dbg !12 } ; Function Attrs: noinline nounwind optnone uwtable define void @_Z2f3v() #0 section "b" { entry: ret void } ; Function Attrs: noinline nounwind optnone uwtable define void @_Z2f4v() #0 section "b" !dbg !13 { entry: ret void, !dbg !14 } ; Function Attrs: noinline nounwind optnone uwtable define void @_Z2f5v() #0 section "e" !dbg !15 { entry: ret void, !dbg !16 } ; Function Attrs: noinline nounwind optnone uwtable define void @_Z2f6v() #0 section "f" !dbg !17 { entry: ret void, !dbg !18 } attributes #0 = { noinline nounwind optnone uwtable "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "no-infs-fp-math"="false" "no-jump-tables"="false" "no-nans-fp-math"="false" "no-signed-zeros-fp-math"="false" "no-trapping-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+fxsr,+mmx,+sse,+sse2,+x87" "unsafe-fp-math"="false" "use-soft-float"="false" } !llvm.dbg.cu = !{!0} !llvm.module.flags = !{!3, !4, !5} !llvm.ident = !{!6} !0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, producer: "clang version 6.0.0 (trunk 309523) (llvm/trunk 309526)", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !2) !1 = !DIFile(filename: "funcs.cpp", directory: "/usr/local/google/home/blaikie/dev/scratch") !2 = !{} !3 = !{i32 2, !"Dwarf Version", i32 4} !4 = !{i32 2, !"Debug Info Version", i32 3} !5 = !{i32 1, !"wchar_size", i32 4} !6 = !{!"clang version 6.0.0 (trunk 309523) (llvm/trunk 309526)"} !7 = distinct !DISubprogram(name: "f1", linkageName: "_Z2f1v", scope: !1, file: !1, line: 1, type: !8, isLocal: false, isDefinition: true, scopeLine: 1, flags: DIFlagPrototyped, isOptimized: false, unit: !0, retainedNodes: !2) !8 = !DISubroutineType(types: !9) !9 = !{null} !10 = !DILocation(line: 1, column: 42, scope: !7) !11 = distinct !DISubprogram(name: "f2", linkageName: "_Z2f2v", scope: !1, file: !1, line: 2, type: !8, isLocal: false, isDefinition: true, scopeLine: 2, flags: DIFlagPrototyped, isOptimized: false, unit: !0, retainedNodes: !2) !12 = !DILocation(line: 2, column: 42, scope: !11) !13 = distinct !DISubprogram(name: "f4", linkageName: "_Z2f4v", scope: !1, file: !1, line: 4, type: !8, isLocal: false, isDefinition: true, scopeLine: 4, flags: DIFlagPrototyped, isOptimized: false, unit: !0, retainedNodes: !2) !14 = !DILocation(line: 4, column: 42, scope: !13) !15 = distinct !DISubprogram(name: "f5", linkageName: "_Z2f5v", scope: !1, file: !1, line: 5, type: !8, isLocal: false, isDefinition: true, scopeLine: 5, flags: DIFlagPrototyped, isOptimized: false, unit: !0, retainedNodes: !2) !16 = !DILocation(line: 5, column: 42, scope: !15) !17 = distinct !DISubprogram(name: "f6", linkageName: "_Z2f6v", scope: !1, file: !1, line: 6, type: !8, isLocal: false, isDefinition: true, scopeLine: 6, flags: DIFlagPrototyped, isOptimized: false, unit: !0, retainedNodes: !2) !18 = !DILocation(line: 6, column: 42, scope: !17)