| ; 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) |
