1; RUN: opt -passes=sroa,verify -S %s -o - \ 2; RUN: | FileCheck %s --implicit-check-not="call void @llvm.dbg" 3; RUN: opt --try-experimental-debuginfo-iterators -passes=sroa,verify -S %s -o - \ 4; RUN: | FileCheck %s --implicit-check-not="call void @llvm.dbg" 5 6; Check that the new slices of an alloca and memset intructions get dbg.assign 7; intrinsics with the correct fragment info. Ensure that only the 8; value-expression gets fragment info; that the address-expression remains 9; untouched. 10 11;; $ cat test.cpp 12;; void do_something(); 13;; struct LargeStruct { 14;; int A, B, C; 15;; int Var; 16;; int D, E, F; 17;; }; 18;; int Glob; 19;; bool Cond; 20;; int example() { 21;; LargeStruct S = {0}; 22;; S.Var = Glob; 23;; return S.Var; 24;; } 25;; $ clang test.cpp -Xclang -disable-llvm-passes -O2 -g -c -S -emit-llvm -o - 26 27; CHECK: entry: 28; CHECK-NEXT: %S.sroa.0 = alloca { i32, i32, i32 }, align 8, !DIAssignID ![[ID_1:[0-9]+]] 29; CHECK-NEXT: #dbg_assign(i1 undef, ![[VAR:[0-9]+]], !DIExpression(DW_OP_LLVM_fragment, 0, 96), ![[ID_1]], ptr %S.sroa.0, !DIExpression(), 30 31;; The middle slice has been promoted, so the alloca has gone away. 32 33; CHECK-NEXT: %S.sroa.5 = alloca { i32, i32, i32 }, align 8, !DIAssignID ![[ID_3:[0-9]+]] 34; CHECK-NEXT: #dbg_assign(i1 undef, ![[VAR]], !DIExpression(DW_OP_LLVM_fragment, 128, 96), ![[ID_3]], ptr %S.sroa.5, !DIExpression(), 35 36;; The memset has been sliced up (middle slice removed). 37; CHECK: call void @llvm.memset{{.*}}(ptr align 8 %S.sroa.0, i8 0, i64 12, i1 false), !dbg !{{.+}}, !DIAssignID ![[ID_5:[0-9]+]] 38; CHECK: call void @llvm.memset{{.*}}(ptr align 8 %S.sroa.5, i8 0, i64 12, i1 false), !dbg !{{.+}}, !DIAssignID ![[ID_6:[0-9]+]] 39 40; CHECK-NEXT: #dbg_assign(i8 0, ![[VAR]], !DIExpression(DW_OP_LLVM_fragment, 0, 96), ![[ID_5]], ptr %S.sroa.0, !DIExpression(), 41;; Check the middle slice (no memset) gets a correct dbg.assign. 42; CHECK-NEXT: #dbg_value(i32 0, ![[VAR]], !DIExpression(DW_OP_LLVM_fragment, 96, 32), 43; CHECK-NEXT: #dbg_assign(i8 0, ![[VAR]], !DIExpression(DW_OP_LLVM_fragment, 128, 96), ![[ID_6]], ptr %S.sroa.5, !DIExpression(), 44 45;; mem2reg promotes the load/store to the middle slice created by SROA: 46; CHECK-NEXT: %0 = load i32, ptr @Glob, align 4, !dbg !{{.+}} 47; CHECK-NEXT: #dbg_value(i32 %0, ![[VAR]], !DIExpression(DW_OP_LLVM_fragment, 96, 32), 48 49target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128" 50 51%struct.LargeStruct = type { i32, i32, i32, i32, i32, i32, i32 } 52 53@Glob = dso_local global i32 0, align 4, !dbg !0 54@Cond = dso_local global i8 0, align 1, !dbg !6 55 56; Function Attrs: nounwind uwtable mustprogress 57define dso_local i32 @_Z7examplev() #0 !dbg !14 { 58entry: 59 %S = alloca %struct.LargeStruct, align 4, !DIAssignID !28 60 call void @llvm.dbg.assign(metadata i1 undef, metadata !18, metadata !DIExpression(), metadata !28, metadata ptr %S, metadata !DIExpression()), !dbg !29 61 %0 = bitcast ptr %S to ptr, !dbg !30 62 call void @llvm.lifetime.start.p0(i64 28, ptr %0) #4, !dbg !30 63 %1 = bitcast ptr %S to ptr, !dbg !31 64 call void @llvm.memset.p0.i64(ptr align 4 %1, i8 0, i64 28, i1 false), !dbg !31, !DIAssignID !32 65 call void @llvm.dbg.assign(metadata i8 0, metadata !18, metadata !DIExpression(), metadata !32, metadata ptr %1, metadata !DIExpression()), !dbg !31 66 %2 = load i32, ptr @Glob, align 4, !dbg !33 67 %Var = getelementptr inbounds %struct.LargeStruct, ptr %S, i32 0, i32 3, !dbg !38 68 store i32 %2, ptr %Var, align 4, !dbg !39, !DIAssignID !42 69 call void @llvm.dbg.assign(metadata i32 %2, metadata !18, metadata !DIExpression(DW_OP_LLVM_fragment, 96, 32), metadata !42, metadata ptr %Var, metadata !DIExpression()), !dbg !39 70 %Var1 = getelementptr inbounds %struct.LargeStruct, ptr %S, i32 0, i32 3, !dbg !43 71 %3 = load i32, ptr %Var1, align 4, !dbg !43 72 %4 = bitcast ptr %S to ptr, !dbg !44 73 call void @llvm.lifetime.end.p0(i64 28, ptr %4) #4, !dbg !44 74 ret i32 %3, !dbg !45 75} 76 77; Function Attrs: argmemonly nofree nosync nounwind willreturn 78declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1 79 80; Function Attrs: argmemonly nofree nosync nounwind willreturn writeonly 81declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #2 82 83; Function Attrs: argmemonly nofree nosync nounwind willreturn 84declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1 85 86; Function Attrs: nofree nosync nounwind readnone speculatable willreturn 87declare void @llvm.dbg.assign(metadata, metadata, metadata, metadata, metadata, metadata) #3 88 89!llvm.dbg.cu = !{!2} 90!llvm.module.flags = !{!10, !11, !12, !1000} 91!llvm.ident = !{!13} 92 93!0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression()) 94!1 = distinct !DIGlobalVariable(name: "Glob", scope: !2, file: !3, line: 7, type: !9, isLocal: false, isDefinition: true) 95!2 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus_14, file: !3, producer: "clang version 12.0.0", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !4, globals: !5, splitDebugInlining: false, nameTableKind: None) 96!3 = !DIFile(filename: "test.cpp", directory: "/") 97!4 = !{} 98!5 = !{!0, !6} 99!6 = !DIGlobalVariableExpression(var: !7, expr: !DIExpression()) 100!7 = distinct !DIGlobalVariable(name: "Cond", scope: !2, file: !3, line: 8, type: !8, isLocal: false, isDefinition: true) 101!8 = !DIBasicType(name: "bool", size: 8, encoding: DW_ATE_boolean) 102!9 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed) 103!10 = !{i32 7, !"Dwarf Version", i32 4} 104!11 = !{i32 2, !"Debug Info Version", i32 3} 105!12 = !{i32 1, !"wchar_size", i32 4} 106!13 = !{!"clang version 12.0.0"} 107!14 = distinct !DISubprogram(name: "example", linkageName: "_Z7examplev", scope: !3, file: !3, line: 9, type: !15, scopeLine: 9, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !2, retainedNodes: !17) 108!15 = !DISubroutineType(types: !16) 109!16 = !{!9} 110!17 = !{!18} 111!18 = !DILocalVariable(name: "S", scope: !14, file: !3, line: 10, type: !19) 112!19 = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "LargeStruct", file: !3, line: 2, size: 224, flags: DIFlagTypePassByValue, elements: !20, identifier: "_ZTS11LargeStruct") 113!20 = !{!21, !22, !23, !24, !25, !26, !27} 114!21 = !DIDerivedType(tag: DW_TAG_member, name: "A", scope: !19, file: !3, line: 3, baseType: !9, size: 32) 115!22 = !DIDerivedType(tag: DW_TAG_member, name: "B", scope: !19, file: !3, line: 3, baseType: !9, size: 32, offset: 32) 116!23 = !DIDerivedType(tag: DW_TAG_member, name: "C", scope: !19, file: !3, line: 3, baseType: !9, size: 32, offset: 64) 117!24 = !DIDerivedType(tag: DW_TAG_member, name: "Var", scope: !19, file: !3, line: 4, baseType: !9, size: 32, offset: 96) 118!25 = !DIDerivedType(tag: DW_TAG_member, name: "D", scope: !19, file: !3, line: 5, baseType: !9, size: 32, offset: 128) 119!26 = !DIDerivedType(tag: DW_TAG_member, name: "E", scope: !19, file: !3, line: 5, baseType: !9, size: 32, offset: 160) 120!27 = !DIDerivedType(tag: DW_TAG_member, name: "F", scope: !19, file: !3, line: 5, baseType: !9, size: 32, offset: 192) 121!28 = distinct !DIAssignID() 122!29 = !DILocation(line: 0, scope: !14) 123!30 = !DILocation(line: 10, column: 3, scope: !14) 124!31 = !DILocation(line: 10, column: 15, scope: !14) 125!32 = distinct !DIAssignID() 126!33 = !DILocation(line: 11, column: 11, scope: !14) 127!38 = !DILocation(line: 11, column: 5, scope: !14) 128!39 = !DILocation(line: 11, column: 9, scope: !14) 129!42 = distinct !DIAssignID() 130!43 = !DILocation(line: 12, column: 12, scope: !14) 131!44 = !DILocation(line: 13, column: 1, scope: !14) 132!45 = !DILocation(line: 12, column: 3, scope: !14) 133!1000 = !{i32 7, !"debug-info-assignment-tracking", i1 true} 134