1 ; RUN: opt < %s -mem2reg -S | FileCheck %s 2 3 ; Testing conversion from dbg.declare to dbg.value when the variable is a VLA. 4 ; 5 ; We can't derive the size of the variable since it is a VLA with an unknown 6 ; number of element. 7 ; 8 ; Verify that we do not get a dbg.value after the phi node (we can't know if 9 ; the phi nodes result describes the whole array or not). Also verify that we 10 ; get a dbg.value that says that we do not know the value of the VLA in place 11 ; of the store (since we do not know which part of the VLA the store is 12 ; writing to). 13 14 ; ModuleID = 'debug-alloca-vla.ll' 15 target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128" 16 target triple = "x86_64-apple-macosx10.12.0" 17 18 ; Function Attrs: nounwind ssp uwtable 19 define void @scan(i32 %n) #0 !dbg !4 { 20 entry: 21 %vla1 = alloca i32, i32 %n, align 8 22 call void @llvm.dbg.declare(metadata i32* %vla1, metadata !10, metadata !DIExpression()), !dbg !18 23 br label %for.cond, !dbg !18 24 25 for.cond: ; preds = %for.cond, %entry 26 ; CHECK: %[[PHI:.*]] = phi i32 [ undef, %entry ], [ %t0, %for.cond ] 27 %entryN = load i32, i32* %vla1, align 8, !dbg !18 28 ; CHECK-NOT: call void @llvm.dbg.value 29 %t0 = add i32 %entryN, 1 30 ; CHECK: %t0 = add i32 %[[PHI]], 1 31 ; CHECK: call void @llvm.dbg.value(metadata i32 undef, 32 ; CHECK-SAME: metadata !DIExpression()) 33 store i32 %t0, i32* %vla1, align 8, !dbg !18 34 br label %for.cond, !dbg !18 35 } 36 37 ; Function Attrs: nounwind readnone speculatable 38 declare void @llvm.dbg.declare(metadata, metadata, metadata) #1 39 40 attributes #0 = { nounwind ssp uwtable } 41 attributes #1 = { nounwind readnone speculatable } 42 43 !llvm.dbg.cu = !{!0} 44 !llvm.module.flags = !{!2, !3} 45 46 !0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "adrian", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug) 47 !1 = !DIFile(filename: "<stdin>", directory: "/") 48 !2 = !{i32 2, !"Debug Info Version", i32 3} 49 !3 = !{i32 7, !"PIC Level", i32 2} 50 !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) 51 !5 = !DISubroutineType(types: !6) 52 !6 = !{null, !7, !7} 53 !7 = !DIBasicType(name: "char", size: 8, encoding: DW_ATE_signed_char) 54 !8 = !{!9} 55 !9 = !DILocalVariable(name: "entry", scope: !4, file: !1, line: 6, type: !7) 56 !10 = !DILocalVariable(name: "ptr32", scope: !4, file: !1, line: 240, type: !11) 57 !11 = !DICompositeType(tag: DW_TAG_array_type, baseType: !12, elements: !14) 58 !12 = !DIDerivedType(tag: DW_TAG_typedef, name: "__uint32_t", file: !1, line: 41, baseType: !13) 59 !13 = !DIBasicType(name: "unsigned int", size: 32, encoding: DW_ATE_unsigned) 60 !14 = !{!15} 61 !15 = !DISubrange(count: !16) 62 !16 = !DILocalVariable(name: "__vla_expr", scope: !4, type: !17, flags: DIFlagArtificial) 63 !17 = !DIBasicType(name: "long unsigned int", size: 64, encoding: DW_ATE_unsigned) 64 !18 = !DILocation(line: 6, scope: !4) 65
