1 ; RUN: llc -filetype=obj -o - < %s | llvm-dwarfdump - --debug-loc | FileCheck %s 2 ; 3 ; Created using clang -g -O3 from: 4 ; struct S0 { 5 ; short f0; 6 ; int f3; 7 ; } a; 8 ; void fn1(short p1) { 9 ; struct S0 b, c = {3}; 10 ; b.f3 = p1; 11 ; a = b = c; 12 ; } 13 ; 14 ; int main() { return 0; } 15 ; 16 ; This is similar to the bug in test/DebugInfo/ARM/PR26163.ll, except that there is an 17 ; extra non-overlapping range first. Thus, we make sure that the backend actually looks 18 ; at all expressions when determining whether to merge ranges, not just the first one. 19 ; AS in 26163, we expect two ranges (as opposed to one), the first one being zero sized 20 ; 21 ; 22 ; CHECK: [0x0000000000000004, 0x0000000000000004): DW_OP_constu 0x3, DW_OP_piece 0x4, DW_OP_reg5 RDI, DW_OP_piece 0x2 23 ; CHECK: [0x0000000000000004, 0x0000000000000014): DW_OP_constu 0x3, DW_OP_piece 0x4, DW_OP_constu 0x0, DW_OP_piece 0x4 24 25 source_filename = "test/DebugInfo/X86/PR26148.ll" 26 target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128" 27 target triple = "x86_64-apple-macosx10.11.0" 28 29 %struct.S0 = type { i16, i32 } 30 31 @a = common global %struct.S0 zeroinitializer, align 4, !dbg !0 32 33 ; Function Attrs: nounwind readnone 34 declare void @llvm.dbg.declare(metadata, metadata, metadata) #0 35 36 ; Function Attrs: nounwind readnone 37 declare void @llvm.dbg.value(metadata, metadata, metadata) #0 38 ; The attributes are here to force the zero-sized range not to be at the start of 39 ; the function, which has special interpretation in DWARF. The fact that this happens 40 ; at all is probably an LLVM bug. 41 42 define void @fn1(i16 signext %p1) #1 !dbg !16 { 43 entry: 44 tail call void @llvm.dbg.value(metadata i16 %p1, metadata !20, metadata !23), !dbg !24 45 tail call void @llvm.dbg.declare(metadata %struct.S0* undef, metadata !21, metadata !23), !dbg !25 46 tail call void @llvm.dbg.declare(metadata %struct.S0* undef, metadata !22, metadata !23), !dbg !26 47 tail call void @llvm.dbg.value(metadata i32 3, metadata !22, metadata !27), !dbg !26 48 tail call void @llvm.dbg.value(metadata i32 0, metadata !22, metadata !28), !dbg !26 49 tail call void @llvm.dbg.value(metadata i16 %p1, metadata !21, metadata !29), !dbg !25 50 tail call void @llvm.dbg.value(metadata i32 3, metadata !21, metadata !27), !dbg !25 51 tail call void @llvm.dbg.value(metadata i32 0, metadata !21, metadata !28), !dbg !25 52 store i32 3, i32* bitcast (%struct.S0* @a to i32*), align 4, !dbg !30 53 store i32 0, i32* getelementptr inbounds (%struct.S0, %struct.S0* @a, i64 0, i32 1), align 4, !dbg !30 54 ret void, !dbg !31 55 } 56 57 define i32 @main() !dbg !32 { 58 entry: 59 ret i32 0, !dbg !35 60 } 61 62 attributes #0 = { nounwind readnone } 63 attributes #1 = { "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" } 64 65 !llvm.dbg.cu = !{!2} 66 !llvm.module.flags = !{!12, !13, !14} 67 !llvm.ident = !{!15} 68 69 !0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression()) 70 !1 = !DIGlobalVariable(name: "a", scope: !2, file: !3, line: 4, type: !6, isLocal: false, isDefinition: true) 71 !2 = distinct !DICompileUnit(language: DW_LANG_C99, file: !3, producer: "clang version 3.9.0 (https://github.com/llvm-mirror/clang 8f258397c5afd7a708bd95770c718e81d08fb11a) (https://github.com/llvm-mirror/llvm 18481855bdfa1b4a424f81be8525db002671348d)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !4, globals: !5) 72 !3 = !DIFile(filename: "small.c", directory: "/Users/kfischer/Projects/clangbug") 73 !4 = !{} 74 !5 = !{!0} 75 !6 = !DICompositeType(tag: DW_TAG_structure_type, name: "S0", file: !3, line: 1, size: 64, align: 32, elements: !7) 76 !7 = !{!8, !10} 77 !8 = !DIDerivedType(tag: DW_TAG_member, name: "f0", scope: !6, file: !3, line: 2, baseType: !9, size: 16, align: 16) 78 !9 = !DIBasicType(name: "short", size: 16, align: 16, encoding: DW_ATE_signed) 79 !10 = !DIDerivedType(tag: DW_TAG_member, name: "f3", scope: !6, file: !3, line: 3, baseType: !11, size: 32, align: 32, offset: 32) 80 !11 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed) 81 !12 = !{i32 2, !"Dwarf Version", i32 2} 82 !13 = !{i32 2, !"Debug Info Version", i32 3} 83 !14 = !{i32 1, !"PIC Level", i32 2} 84 !15 = !{!"clang version 3.9.0 (https://github.com/llvm-mirror/clang 8f258397c5afd7a708bd95770c718e81d08fb11a) (https://github.com/llvm-mirror/llvm 18481855bdfa1b4a424f81be8525db002671348d)"} 85 !16 = distinct !DISubprogram(name: "fn1", scope: !3, file: !3, line: 5, type: !17, isLocal: false, isDefinition: true, scopeLine: 5, flags: DIFlagPrototyped, isOptimized: true, unit: !2, retainedNodes: !19) 86 !17 = !DISubroutineType(types: !18) 87 !18 = !{null, !9} 88 !19 = !{!20, !21, !22} 89 !20 = !DILocalVariable(name: "p1", arg: 1, scope: !16, file: !3, line: 5, type: !9) 90 !21 = !DILocalVariable(name: "b", scope: !16, file: !3, line: 6, type: !6) 91 !22 = !DILocalVariable(name: "c", scope: !16, file: !3, line: 6, type: !6) 92 !23 = !DIExpression() 93 !24 = !DILocation(line: 5, column: 16, scope: !16) 94 !25 = !DILocation(line: 6, column: 13, scope: !16) 95 !26 = !DILocation(line: 6, column: 16, scope: !16) 96 !27 = !DIExpression(DW_OP_LLVM_fragment, 0, 32) 97 !28 = !DIExpression(DW_OP_LLVM_fragment, 32, 32) 98 !29 = !DIExpression(DW_OP_LLVM_fragment, 32, 16) 99 !30 = !DILocation(line: 8, column: 9, scope: !16) 100 !31 = !DILocation(line: 9, column: 1, scope: !16) 101 !32 = distinct !DISubprogram(name: "main", scope: !3, file: !3, line: 11, type: !33, isLocal: false, isDefinition: true, scopeLine: 11, isOptimized: true, unit: !2, retainedNodes: !4) 102 !33 = !DISubroutineType(types: !34) 103 !34 = !{!11} 104 !35 = !DILocation(line: 11, column: 14, scope: !32) 105 106
