| ; 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) |
