; RUN: llc -filetype=asm -mtriple=x86_64-pc-linux-gnu %s -o - | FileCheck %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). ; This is a merged module containing two CUs, one that uses range base address ; specifiers and exercises different cases there, and another that does not ; ranges.cpp ; Single range entry ; __attribute__((section("a"))) void f1() {} ; Single address with two ranges due to the whole caused by f3 ; __attribute__((section("b"))) void f2() {} ; __attribute__((section("b"))) __attribute__((nodebug)) void f3() {} ; __attribute__((section("b"))) void f4() {} ; Reset the base address & emit a couple more single range entries ; __attribute__((section("c"))) void f5() {} ; __attribute__((section("d"))) void f6() {} ; ranges_no_base.cpp: ; Include enough complexity to cause ranges to be emitted, so it can be checked ; that those ranges don't use base address specifiers ; __attribute__((section("e"))) void f7() {} ; __attribute__((section("f"))) void f8() {} ; CHECK: {{^.Ldebug_ranges0}} ; CHECK-NEXT: .quad -1 ; CHECK-NEXT: .quad .Lfunc_begin0 ; CHECK-NEXT: .quad .Lfunc_begin0-.Lfunc_begin0 ; CHECK-NEXT: .quad .Lfunc_end0-.Lfunc_begin0 ; CHECK-NEXT: .quad -1 ; CHECK-NEXT: .quad .Lfunc_begin1 ; CHECK-NEXT: .quad .Lfunc_begin1-.Lfunc_begin1 ; CHECK-NEXT: .quad .Lfunc_end1-.Lfunc_begin1 ; CHECK-NEXT: .quad .Lfunc_begin3-.Lfunc_begin1 ; CHECK-NEXT: .quad .Lfunc_end3-.Lfunc_begin1 ; CHECK-NEXT: .quad -1 ; CHECK-NEXT: .quad .Lfunc_begin4 ; CHECK-NEXT: .quad .Lfunc_begin4-.Lfunc_begin4 ; CHECK-NEXT: .quad .Lfunc_end4-.Lfunc_begin4 ; CHECK-NEXT: .quad -1 ; CHECK-NEXT: .quad .Lfunc_begin5 ; CHECK-NEXT: .quad .Lfunc_begin5-.Lfunc_begin5 ; CHECK-NEXT: .quad .Lfunc_end5-.Lfunc_begin5 ; CHECK-NEXT: .quad 0 ; CHECK-NEXT: .quad 0 ; CHECK-NEXT: {{^.Ldebug_ranges1}} ; CHECK-NEXT: .quad .Lfunc_begin6 ; CHECK-NEXT: .quad .Lfunc_end6 ; CHECK-NEXT: .quad .Lfunc_begin7 ; CHECK-NEXT: .quad .Lfunc_end7 ; DWARF5: {{^.Ldebug_ranges0}} ; DWARF5-NEXT: # DW_RLE_startx_length ; DWARF5-NEXT: .byte 0 # start index ; DWARF5-NEXT: .uleb128 .Lfunc_end0-.Lfunc_begin0 # length ; DWARF5-NEXT: # DW_RLE_base_addressx ; DWARF5-NEXT: .byte 1 # base address index ; 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_startx_length ; DWARF5-NEXT: .byte 3 # start index ; DWARF5-NEXT: .uleb128 .Lfunc_end4-.Lfunc_begin4 # length ; DWARF5-NEXT: # DW_RLE_startx_length ; DWARF5-NEXT: .byte 4 # start index ; DWARF5-NEXT: .uleb128 .Lfunc_end5-.Lfunc_begin5 # length ; DWARF5-NEXT: # DW_RLE_end_of_list ; DWARF5-NEXT: {{^.Ldebug_ranges1}} ; DWARF5-NEXT: # DW_RLE_startx_length ; DWARF5-NEXT: .byte 5 # start index ; DWARF5-NEXT: .uleb128 .Lfunc_end6-.Lfunc_begin6 # length ; DWARF5-NEXT: # DW_RLE_startx_length ; DWARF5-NEXT: .byte 6 # start index ; DWARF5-NEXT: .uleb128 .Lfunc_end7-.Lfunc_begin7 # length ; DWARF5-NEXT: # DW_RLE_end_of_list ; Function Attrs: noinline nounwind optnone uwtable define dso_local void @_Z2f1v() section "a" !dbg !9 { entry: ret void, !dbg !12 } ; Function Attrs: noinline nounwind optnone uwtable define dso_local void @_Z2f2v() section "b" !dbg !13 { entry: ret void, !dbg !14 } ; Function Attrs: noinline nounwind optnone uwtable define dso_local void @_Z2f3v() section "b" { entry: ret void } ; Function Attrs: noinline nounwind optnone uwtable define dso_local void @_Z2f4v() section "b" !dbg !15 { entry: ret void, !dbg !16 } ; Function Attrs: noinline nounwind optnone uwtable define dso_local void @_Z2f5v() section "c" !dbg !17 { entry: ret void, !dbg !18 } ; Function Attrs: noinline nounwind optnone uwtable define dso_local void @_Z2f6v() section "d" !dbg !19 { entry: ret void, !dbg !20 } ; Function Attrs: noinline nounwind optnone uwtable define dso_local void @_Z2f7v() section "e" !dbg !21 { entry: ret void, !dbg !22 } ; Function Attrs: noinline nounwind optnone uwtable define dso_local void @_Z2f8v() section "f" !dbg !23 { entry: ret void, !dbg !24 } !llvm.dbg.cu = !{!0, !3} !llvm.ident = !{!5, !5} !llvm.module.flags = !{!6, !7, !8} !0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, producer: "clang version 8.0.0 (trunk 346343) (llvm/trunk 346350)", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, nameTableKind: None, rangesBaseAddress: true) !1 = !DIFile(filename: "ranges.cpp", directory: "/usr/local/google/home/blaikie/dev/scratch") !2 = !{} !3 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !4, producer: "clang version 8.0.0 (trunk 346343) (llvm/trunk 346350)", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, nameTableKind: None) !4 = !DIFile(filename: "ranges_no_base.cpp", directory: "/usr/local/google/home/blaikie/dev/scratch") !5 = !{!"clang version 8.0.0 (trunk 346343) (llvm/trunk 346350)"} !6 = !{i32 2, !"Dwarf Version", i32 4} !7 = !{i32 2, !"Debug Info Version", i32 3} !8 = !{i32 1, !"wchar_size", i32 4} !9 = distinct !DISubprogram(name: "f1", linkageName: "_Z2f1v", scope: !1, file: !1, line: 1, type: !10, isLocal: false, isDefinition: true, scopeLine: 1, flags: DIFlagPrototyped, isOptimized: false, unit: !0, retainedNodes: !2) !10 = !DISubroutineType(types: !11) !11 = !{null} !12 = !DILocation(line: 1, column: 42, scope: !9) !13 = distinct !DISubprogram(name: "f2", linkageName: "_Z2f2v", scope: !1, file: !1, line: 2, type: !10, isLocal: false, isDefinition: true, scopeLine: 2, flags: DIFlagPrototyped, isOptimized: false, unit: !0, retainedNodes: !2) !14 = !DILocation(line: 2, column: 42, scope: !13) !15 = distinct !DISubprogram(name: "f4", linkageName: "_Z2f4v", scope: !1, file: !1, line: 4, type: !10, isLocal: false, isDefinition: true, scopeLine: 4, flags: DIFlagPrototyped, isOptimized: false, unit: !0, retainedNodes: !2) !16 = !DILocation(line: 4, column: 42, scope: !15) !17 = distinct !DISubprogram(name: "f5", linkageName: "_Z2f5v", scope: !1, file: !1, line: 5, type: !10, isLocal: false, isDefinition: true, scopeLine: 5, flags: DIFlagPrototyped, isOptimized: false, unit: !0, retainedNodes: !2) !18 = !DILocation(line: 5, column: 42, scope: !17) !19 = distinct !DISubprogram(name: "f6", linkageName: "_Z2f6v", scope: !1, file: !1, line: 6, type: !10, isLocal: false, isDefinition: true, scopeLine: 6, flags: DIFlagPrototyped, isOptimized: false, unit: !0, retainedNodes: !2) !20 = !DILocation(line: 6, column: 42, scope: !19) !21 = distinct !DISubprogram(name: "f7", linkageName: "_Z2f7v", scope: !4, file: !4, line: 1, type: !10, isLocal: false, isDefinition: true, scopeLine: 1, flags: DIFlagPrototyped, isOptimized: false, unit: !3, retainedNodes: !2) !22 = !DILocation(line: 1, column: 42, scope: !21) !23 = distinct !DISubprogram(name: "f8", linkageName: "_Z2f8v", scope: !4, file: !4, line: 2, type: !10, isLocal: false, isDefinition: true, scopeLine: 2, flags: DIFlagPrototyped, isOptimized: false, unit: !3, retainedNodes: !2) !24 = !DILocation(line: 2, column: 42, scope: !23)