1 ; RUN: llc -start-after=codegenprepare -stop-before expand-isel-pseudos -o - %s | FileCheck %s 2 3 ; This is a reproducer based on the test case from PR37321. 4 5 ; We verify that the fragment for the last DBG_VALUE is limited depending 6 ; on the size of the original fragment (and that we do not emit more 7 ; DBG_VALUE instructions than needed in case we cover the whole original 8 ; fragment with just a few DBG_VALUE instructions). 9 10 ; CHECK-LABEL: bb.{{.*}}.if.end36: 11 ; CHECK: [[REG1:%[0-9]+]]:gr32 = PHI 12 ; CHECK-NEXT: [[REG2:%[0-9]+]]:gr32 = PHI 13 ; CHECK-NEXT: [[REG3:%[0-9]+]]:gr32 = PHI 14 ; CHECK-NEXT: DBG_VALUE debug-use [[REG1]], debug-use $noreg, !13, !DIExpression(DW_OP_LLVM_fragment, 0, 32) 15 ; CHECK-NEXT: DBG_VALUE debug-use [[REG2]], debug-use $noreg, !13, !DIExpression(DW_OP_LLVM_fragment, 32, 32) 16 ; CHECK-NEXT: DBG_VALUE debug-use [[REG3]], debug-use $noreg, !13, !DIExpression(DW_OP_LLVM_fragment, 64, 16) 17 ; CHECK-NEXT: DBG_VALUE debug-use [[REG1]], debug-use $noreg, !12, !DIExpression(DW_OP_LLVM_fragment, 10, 32) 18 ; CHECK-NEXT: DBG_VALUE debug-use [[REG2]], debug-use $noreg, !12, !DIExpression(DW_OP_LLVM_fragment, 42, 13) 19 ; CHECK-NOT: DBG_VALUE 20 21 target datalayout = "e-m:x-p:32:32-i64:64-f80:32-n8:16:32-a:0:32-S32" 22 target triple = "i686-w64-windows-gnu" 23 24 ; Function Attrs: nounwind readnone 25 define dso_local i64 @nextafterl(i80 %a) local_unnamed_addr #0 !dbg !6 { 26 entry: 27 br i1 undef, label %if.else, label %if.then13, !dbg !28 28 29 if.then13: ; preds = %entry 30 %u.sroa.0.8.insert.insert = or i80 %a, 2222, !dbg !29 31 br label %if.end36, !dbg !33 32 33 if.else: ; preds = %entry 34 br label %if.end36 35 36 if.end36: ; preds = %if.else, %if.then13 37 %u.sroa.0.1.in = phi i80 [ %u.sroa.0.8.insert.insert, %if.then13 ], [ 1234567, %if.else ] 38 call void @llvm.dbg.value(metadata i80 %u.sroa.0.1.in, metadata !13, metadata !DIExpression(DW_OP_LLVM_fragment, 0, 80)), !dbg !34 39 call void @llvm.dbg.value(metadata i80 %u.sroa.0.1.in, metadata !12, metadata !DIExpression(DW_OP_LLVM_fragment, 10, 45)), !dbg !34 40 %u.sroa.0.0.extract.ashr = ashr i80 %u.sroa.0.1.in, 8, !dbg !35 41 %u.sroa.0.0.extract.trunc = trunc i80 %u.sroa.0.0.extract.ashr to i64, !dbg !35 42 ret i64 %u.sroa.0.0.extract.trunc 43 } 44 45 ; Function Attrs: nounwind readnone speculatable 46 declare void @llvm.dbg.value(metadata, metadata, metadata) #1 47 48 attributes #0 = { nounwind readnone } 49 attributes #1 = { nounwind readnone speculatable } 50 51 !llvm.dbg.cu = !{!0} 52 !llvm.module.flags = !{!26, !27} 53 54 !0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 7.0.0 (trunk 330808) (llvm/trunk 330813)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, globals: !3) 55 !1 = !DIFile(filename: "pr37321.c", directory: "") 56 !2 = !{} 57 !3 = !{!4} 58 !4 = !DIGlobalVariableExpression(var: !5, expr: !DIExpression()) 59 !5 = distinct !DIGlobalVariable(name: "normal_bit", scope: !6, file: !1, line: 31, type: !25, isLocal: true, isDefinition: true) 60 !6 = distinct !DISubprogram(name: "nextafterl", scope: !1, file: !1, line: 17, type: !7, isLocal: false, isDefinition: true, scopeLine: 18, flags: DIFlagPrototyped, isOptimized: true, unit: !0, retainedNodes: !10) 61 !7 = !DISubroutineType(types: !8) 62 !8 = !{!9, !9, !9} 63 !9 = !DIBasicType(name: "long double", size: 96, encoding: DW_ATE_float) 64 !10 = !{!11, !12, !13} 65 !11 = !DILocalVariable(name: "x", arg: 1, scope: !6, file: !1, line: 17, type: !9) 66 !12 = !DILocalVariable(name: "y", arg: 2, scope: !6, file: !1, line: 17, type: !9) 67 !13 = !DILocalVariable(name: "u", scope: !6, file: !1, line: 27, type: !14) 68 !14 = distinct !DICompositeType(tag: DW_TAG_union_type, scope: !6, file: !1, line: 19, size: 128, elements: !15) 69 !15 = !{!16, !17} 70 !16 = !DIDerivedType(tag: DW_TAG_member, name: "ld", scope: !14, file: !1, line: 20, baseType: !9, size: 96) 71 !17 = !DIDerivedType(tag: DW_TAG_member, name: "parts", scope: !14, file: !1, line: 26, baseType: !18, size: 128) 72 !18 = distinct !DICompositeType(tag: DW_TAG_structure_type, scope: !14, file: !1, line: 21, size: 128, elements: !19) 73 !19 = !{!20, !22, !24} 74 !20 = !DIDerivedType(tag: DW_TAG_member, name: "mantissa", scope: !18, file: !1, line: 23, baseType: !21, size: 64) 75 !21 = !DIBasicType(name: "long long unsigned int", size: 64, encoding: DW_ATE_unsigned) 76 !22 = !DIDerivedType(tag: DW_TAG_member, name: "expn", scope: !18, file: !1, line: 24, baseType: !23, size: 16, offset: 64) 77 !23 = !DIBasicType(name: "unsigned short", size: 16, encoding: DW_ATE_unsigned) 78 !24 = !DIDerivedType(tag: DW_TAG_member, name: "pad", scope: !18, file: !1, line: 25, baseType: !23, size: 16, offset: 80) 79 !25 = !DIDerivedType(tag: DW_TAG_const_type, baseType: !21) 80 !26 = !{i32 2, !"Debug Info Version", i32 3} 81 !27 = !{i32 1, !"wchar_size", i32 2} 82 !28 = !DILocation(line: 47, column: 7, scope: !6) 83 !29 = !DILocation(line: 51, column: 14, scope: !30) 84 !30 = distinct !DILexicalBlock(scope: !31, file: !1, line: 50, column: 11) 85 !31 = distinct !DILexicalBlock(scope: !32, file: !1, line: 48, column: 5) 86 !32 = distinct !DILexicalBlock(scope: !6, file: !1, line: 47, column: 7) 87 !33 = !DILocation(line: 51, column: 2, scope: !30) 88 !34 = !DILocation(line: 27, column: 5, scope: !6) 89 !35 = !DILocation(line: 63, column: 22, scope: !36) 90 !36 = distinct !DILexicalBlock(scope: !6, file: !1, line: 62, column: 7) 91
