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1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py2; RUN: opt < %s -passes=mem2reg -S | FileCheck %s3 4; Testing conversion from dbg.declare to dbg.value when the variable is a VLA.5;6; We can't derive the size of the variable since it is a VLA with an unknown7; number of element.8;9; Verify that we do not get a dbg.value after the phi node (we can't know if10; the phi nodes result describes the whole array or not). Also verify that we11; get a dbg.value that says that we do not know the value of the VLA in place12; of the store (since we do not know which part of the VLA the store is13; writing to).14 15; ModuleID = 'debug-alloca-vla.ll'16target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"17target triple = "x86_64-apple-macosx10.12.0"18 19; Function Attrs: nounwind ssp uwtable20define void @scan(i32 %n) #0 !dbg !4 {21; CHECK-LABEL: @scan(22; CHECK-NEXT: entry:23; CHECK-NEXT: br label [[FOR_COND:%.*]], !dbg [[DBG10:![0-9]+]]24; CHECK: for.cond:25; CHECK-NEXT: [[VLA1_0:%.*]] = phi i32 [ undef, [[ENTRY:%.*]] ], [ [[T0:%.*]], [[FOR_COND]] ]26; CHECK-NEXT: [[T0]] = add i32 [[VLA1_0]], 127; CHECK-NEXT: #dbg_value(i32 poison, [[META11:![0-9]+]], !DIExpression(), [[META19:![0-9]+]])28; CHECK-NEXT: br label [[FOR_COND]], !dbg [[DBG10]]29;30entry:31 %vla1 = alloca i32, i32 %n, align 832 call void @llvm.dbg.declare(metadata ptr %vla1, metadata !10, metadata !DIExpression()), !dbg !1833 br label %for.cond, !dbg !1834 35for.cond: ; preds = %for.cond, %entry36 %entryN = load i32, ptr %vla1, align 8, !dbg !1837 %t0 = add i32 %entryN, 138 store i32 %t0, ptr %vla1, align 8, !dbg !1839 br label %for.cond, !dbg !1840}41 42; Function Attrs: nounwind readnone speculatable43declare void @llvm.dbg.declare(metadata, metadata, metadata) #144 45attributes #0 = { nounwind ssp uwtable }46attributes #1 = { nounwind readnone speculatable }47 48!llvm.dbg.cu = !{!0}49!llvm.module.flags = !{!2, !3}50 51!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "adrian", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug)52!1 = !DIFile(filename: "<stdin>", directory: "/")53!2 = !{i32 2, !"Debug Info Version", i32 3}54!3 = !{i32 7, !"PIC Level", i32 2}55!4 = distinct !DISubprogram(name: "scan", scope: !1, file: !1, line: 4, type: !5, isLocal: false, isDefinition: true, scopeLine: 5, flags: DIFlagPrototyped, isOptimized: true, unit: !0, retainedNodes: !8)56!5 = !DISubroutineType(types: !6)57!6 = !{null, !7, !7}58!7 = !DIBasicType(name: "char", size: 8, encoding: DW_ATE_signed_char)59!8 = !{!9}60!9 = !DILocalVariable(name: "entry", scope: !4, file: !1, line: 6, type: !7)61!10 = !DILocalVariable(name: "ptr32", scope: !4, file: !1, line: 240, type: !11)62!11 = !DICompositeType(tag: DW_TAG_array_type, baseType: !12, elements: !14)63!12 = !DIDerivedType(tag: DW_TAG_typedef, name: "__uint32_t", file: !1, line: 41, baseType: !13)64!13 = !DIBasicType(name: "unsigned int", size: 32, encoding: DW_ATE_unsigned)65!14 = !{!15}66!15 = !DISubrange(count: !16)67!16 = !DILocalVariable(name: "__vla_expr", scope: !4, type: !17, flags: DIFlagArtificial)68!17 = !DIBasicType(name: "long unsigned int", size: 64, encoding: DW_ATE_unsigned)69!18 = !DILocation(line: 6, scope: !4)70