1;; The dbg value for buflen in the non-entry basic block spans the entire 2;; function and is emitted as DW_AT_const_value. Even with basic block 3;; sections, this can be done as the entire function is represented as ranges. 4 5; RUN: llc %s -mtriple=x86_64-unknown-linux-gnu --dwarf-version=4 --basic-block-sections=none -filetype=obj -o - | llvm-dwarfdump - | FileCheck %s 6; RUN: llc %s -mtriple=x86_64-unknown-linux-gnu --dwarf-version=4 --basic-block-sections=all -filetype=obj -o - | llvm-dwarfdump - | FileCheck %s 7; RUN: llc %s -mtriple=x86_64-unknown-linux-gnu --dwarf-version=5 --basic-block-sections=none -filetype=obj -o - | llvm-dwarfdump - | FileCheck %s 8; RUN: llc %s -mtriple=x86_64-unknown-linux-gnu --dwarf-version=5 --basic-block-sections=all -filetype=obj -o - | llvm-dwarfdump - | FileCheck %s 9 10; CHECK: DW_AT_const_value (157) 11; CHECK-NEXT: DW_AT_name ("buflen") 12 13;; We do not have the source to reproduce this as this was IR was obtained 14;; using a reducer from a failing compile. 15 16define dso_local void @_ZL4ncatPcjz(ptr %0, i32 %1, ...) unnamed_addr align 32 !dbg !22 { 17.critedge3: 18 call void @llvm.dbg.value(metadata i32 157, metadata !27, metadata !DIExpression()), !dbg !46 19 call void @llvm.va_start(ptr nonnull undef), !dbg !47 20 br label %2 21 222: ; preds = %2, %.critedge3 23 br label %2 24} 25 26declare void @llvm.va_start(ptr) 27 28declare void @llvm.dbg.value(metadata, metadata, metadata) 29 30!llvm.dbg.cu = !{!0} 31!llvm.module.flags = !{!20, !21} 32 33!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus_14, file: !1, producer: "clang", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, retainedTypes: !2) 34!1 = !DIFile(filename: "bug.cpp", directory: "/proc/self/cwd") 35!2 = !{!3, !6, !9, !10, !11, !13, !16, !17, !15} 36!3 = !DIDerivedType(tag: DW_TAG_typedef, name: "int32_t", file: !4, line: 38, baseType: !5) 37!4 = !DIFile(filename: "stdint.h", directory: "/proc/self/cwd") 38!5 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed) 39!6 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !7, size: 64) 40!7 = !DIDerivedType(tag: DW_TAG_const_type, baseType: !8) 41!8 = !DIBasicType(name: "char", size: 8, encoding: DW_ATE_unsigned_char) 42!9 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !8, size: 64) 43!10 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: null, size: 64) 44!11 = !DIDerivedType(tag: DW_TAG_typedef, name: "uint32_t", file: !4, line: 51, baseType: !12) 45!12 = !DIBasicType(name: "unsigned int", size: 32, encoding: DW_ATE_unsigned) 46!13 = !DIDerivedType(tag: DW_TAG_typedef, name: "UChar", file: !14, line: 372, baseType: !15) 47!14 = !DIFile(filename: "umachine.h", directory: "/proc/self/cwd") 48!15 = !DIBasicType(name: "char16_t", size: 16, encoding: DW_ATE_UTF) 49!16 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !3, size: 64) 50!17 = !DIDerivedType(tag: DW_TAG_typedef, name: "UBool", file: !14, line: 261, baseType: !18) 51!18 = !DIDerivedType(tag: DW_TAG_typedef, name: "int8_t", file: !4, line: 36, baseType: !19) 52!19 = !DIBasicType(name: "signed char", size: 8, encoding: DW_ATE_signed_char) 53!20 = !{i32 2, !"Debug Info Version", i32 3} 54!21 = !{i32 7, !"PIC Level", i32 2} 55!22 = distinct !DISubprogram(name: "ncat", linkageName: "_ZL4ncatPcjz", scope: !1, file: !1, line: 37, type: !23, scopeLine: 37, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagLocalToUnit | DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !25) 56!23 = !DISubroutineType(types: !24) 57!24 = !{!3, !9, !11, null} 58!25 = !{!26, !27, !28, !41, !42, !43, !44} 59!26 = !DILocalVariable(name: "buffer", arg: 1, scope: !22, file: !1, line: 37, type: !9) 60!27 = !DILocalVariable(name: "buflen", arg: 2, scope: !22, file: !1, line: 37, type: !11) 61!28 = !DILocalVariable(name: "args", scope: !22, file: !1, line: 38, type: !29) 62!29 = !DIDerivedType(tag: DW_TAG_typedef, name: "va_list", file: !30, line: 14, baseType: !31) 63!30 = !DIFile(filename: "stdarg.h", directory: "/proc/self/cwd") 64!31 = !DIDerivedType(tag: DW_TAG_typedef, name: "__builtin_va_list", file: !1, line: 38, baseType: !32) 65!32 = !DICompositeType(tag: DW_TAG_array_type, baseType: !33, size: 192, elements: !39) 66!33 = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "__va_list_tag", file: !1, line: 38, size: 192, flags: DIFlagTypePassByValue, elements: !34, identifier: "_ZTS13__va_list_tag") 67!34 = !{!35, !36, !37, !38} 68!35 = !DIDerivedType(tag: DW_TAG_member, name: "gp_offset", scope: !33, file: !1, line: 38, baseType: !12, size: 32) 69!36 = !DIDerivedType(tag: DW_TAG_member, name: "fp_offset", scope: !33, file: !1, line: 38, baseType: !12, size: 32, offset: 32) 70!37 = !DIDerivedType(tag: DW_TAG_member, name: "overflow_arg_area", scope: !33, file: !1, line: 38, baseType: !10, size: 64, offset: 64) 71!38 = !DIDerivedType(tag: DW_TAG_member, name: "reg_save_area", scope: !33, file: !1, line: 38, baseType: !10, size: 64, offset: 128) 72!39 = !{!40} 73!40 = !DISubrange(count: 1) 74!41 = !DILocalVariable(name: "str", scope: !22, file: !1, line: 39, type: !9) 75!42 = !DILocalVariable(name: "p", scope: !22, file: !1, line: 40, type: !9) 76!43 = !DILocalVariable(name: "e", scope: !22, file: !1, line: 41, type: !6) 77!44 = !DILocalVariable(name: "c", scope: !45, file: !1, line: 49, type: !8) 78!45 = distinct !DILexicalBlock(scope: !22, file: !1, line: 48, column: 45) 79!46 = !DILocation(line: 0, scope: !22) 80!47 = !DILocation(line: 47, column: 3, scope: !22) 81