; RUN: opt -passes=sroa,verify -S %s -o - \ ; RUN: | FileCheck %s --implicit-check-not="call void @llvm.dbg" ; RUN: opt --try-experimental-debuginfo-iterators -passes=sroa,verify -S %s -o - \ ; RUN: | FileCheck %s --implicit-check-not="call void @llvm.dbg" ; Check that the new slices of an alloca and memset intructions get dbg.assign ; intrinsics with the correct fragment info. Ensure that only the ; value-expression gets fragment info; that the address-expression remains ; untouched. ;; $ cat test.cpp ;; void do_something(); ;; struct LargeStruct { ;; int A, B, C; ;; int Var; ;; int D, E, F; ;; }; ;; int Glob; ;; bool Cond; ;; int example() { ;; LargeStruct S = {0}; ;; S.Var = Glob; ;; return S.Var; ;; } ;; $ clang test.cpp -Xclang -disable-llvm-passes -O2 -g -c -S -emit-llvm -o - ; CHECK: entry: ; CHECK-NEXT: %S.sroa.0 = alloca { i32, i32, i32 }, align 8, !DIAssignID ![[ID_1:[0-9]+]] ; CHECK-NEXT: call void @llvm.dbg.assign(metadata i1 undef, metadata ![[VAR:[0-9]+]], metadata !DIExpression(DW_OP_LLVM_fragment, 0, 96), metadata ![[ID_1]], metadata ptr %S.sroa.0, metadata !DIExpression()), !dbg ;; The middle slice has been promoted, so the alloca has gone away. ; CHECK-NEXT: %S.sroa.5 = alloca { i32, i32, i32 }, align 8, !DIAssignID ![[ID_3:[0-9]+]] ; CHECK-NEXT: call void @llvm.dbg.assign(metadata i1 undef, metadata ![[VAR]], metadata !DIExpression(DW_OP_LLVM_fragment, 128, 96), metadata ![[ID_3]], metadata ptr %S.sroa.5, metadata !DIExpression()), !dbg ;; The memset has been sliced up (middle slice removed). ; CHECK: call void @llvm.memset{{.*}}(ptr align 8 %S.sroa.0, i8 0, i64 12, i1 false), !dbg !{{.+}}, !DIAssignID ![[ID_5:[0-9]+]] ; CHECK: call void @llvm.memset{{.*}}(ptr align 8 %S.sroa.5, i8 0, i64 12, i1 false), !dbg !{{.+}}, !DIAssignID ![[ID_6:[0-9]+]] ; CHECK-NEXT: call void @llvm.dbg.assign(metadata i8 0, metadata ![[VAR]], metadata !DIExpression(DW_OP_LLVM_fragment, 0, 96), metadata ![[ID_5]], metadata ptr %S.sroa.0, metadata !DIExpression()), !dbg ;; Check the middle slice (no memset) gets a correct dbg.assign. ; CHECK-NEXT: call void @llvm.dbg.value(metadata i32 0, metadata ![[VAR]], metadata !DIExpression(DW_OP_LLVM_fragment, 96, 32)) ; CHECK-NEXT: call void @llvm.dbg.assign(metadata i8 0, metadata ![[VAR]], metadata !DIExpression(DW_OP_LLVM_fragment, 128, 96), metadata ![[ID_6]], metadata ptr %S.sroa.5, metadata !DIExpression()), !dbg ;; mem2reg promotes the load/store to the middle slice created by SROA: ; CHECK-NEXT: %0 = load i32, ptr @Glob, align 4, !dbg !{{.+}} ; CHECK-NEXT: call void @llvm.dbg.value(metadata i32 %0, metadata ![[VAR]], metadata !DIExpression(DW_OP_LLVM_fragment, 96, 32)) target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128" %struct.LargeStruct = type { i32, i32, i32, i32, i32, i32, i32 } @Glob = dso_local global i32 0, align 4, !dbg !0 @Cond = dso_local global i8 0, align 1, !dbg !6 ; Function Attrs: nounwind uwtable mustprogress define dso_local i32 @_Z7examplev() #0 !dbg !14 { entry: %S = alloca %struct.LargeStruct, align 4, !DIAssignID !28 call void @llvm.dbg.assign(metadata i1 undef, metadata !18, metadata !DIExpression(), metadata !28, metadata ptr %S, metadata !DIExpression()), !dbg !29 %0 = bitcast ptr %S to ptr, !dbg !30 call void @llvm.lifetime.start.p0i8(i64 28, ptr %0) #4, !dbg !30 %1 = bitcast ptr %S to ptr, !dbg !31 call void @llvm.memset.p0i8.i64(ptr align 4 %1, i8 0, i64 28, i1 false), !dbg !31, !DIAssignID !32 call void @llvm.dbg.assign(metadata i8 0, metadata !18, metadata !DIExpression(), metadata !32, metadata ptr %1, metadata !DIExpression()), !dbg !31 %2 = load i32, ptr @Glob, align 4, !dbg !33 %Var = getelementptr inbounds %struct.LargeStruct, ptr %S, i32 0, i32 3, !dbg !38 store i32 %2, ptr %Var, align 4, !dbg !39, !DIAssignID !42 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 %Var1 = getelementptr inbounds %struct.LargeStruct, ptr %S, i32 0, i32 3, !dbg !43 %3 = load i32, ptr %Var1, align 4, !dbg !43 %4 = bitcast ptr %S to ptr, !dbg !44 call void @llvm.lifetime.end.p0i8(i64 28, ptr %4) #4, !dbg !44 ret i32 %3, !dbg !45 } ; Function Attrs: argmemonly nofree nosync nounwind willreturn declare void @llvm.lifetime.start.p0i8(i64 immarg, ptr nocapture) #1 ; Function Attrs: argmemonly nofree nosync nounwind willreturn writeonly declare void @llvm.memset.p0i8.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #2 ; Function Attrs: argmemonly nofree nosync nounwind willreturn declare void @llvm.lifetime.end.p0i8(i64 immarg, ptr nocapture) #1 ; Function Attrs: nofree nosync nounwind readnone speculatable willreturn declare void @llvm.dbg.assign(metadata, metadata, metadata, metadata, metadata, metadata) #3 !llvm.dbg.cu = !{!2} !llvm.module.flags = !{!10, !11, !12, !1000} !llvm.ident = !{!13} !0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression()) !1 = distinct !DIGlobalVariable(name: "Glob", scope: !2, file: !3, line: 7, type: !9, isLocal: false, isDefinition: true) !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) !3 = !DIFile(filename: "test.cpp", directory: "/") !4 = !{} !5 = !{!0, !6} !6 = !DIGlobalVariableExpression(var: !7, expr: !DIExpression()) !7 = distinct !DIGlobalVariable(name: "Cond", scope: !2, file: !3, line: 8, type: !8, isLocal: false, isDefinition: true) !8 = !DIBasicType(name: "bool", size: 8, encoding: DW_ATE_boolean) !9 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed) !10 = !{i32 7, !"Dwarf Version", i32 4} !11 = !{i32 2, !"Debug Info Version", i32 3} !12 = !{i32 1, !"wchar_size", i32 4} !13 = !{!"clang version 12.0.0"} !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) !15 = !DISubroutineType(types: !16) !16 = !{!9} !17 = !{!18} !18 = !DILocalVariable(name: "S", scope: !14, file: !3, line: 10, type: !19) !19 = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "LargeStruct", file: !3, line: 2, size: 224, flags: DIFlagTypePassByValue, elements: !20, identifier: "_ZTS11LargeStruct") !20 = !{!21, !22, !23, !24, !25, !26, !27} !21 = !DIDerivedType(tag: DW_TAG_member, name: "A", scope: !19, file: !3, line: 3, baseType: !9, size: 32) !22 = !DIDerivedType(tag: DW_TAG_member, name: "B", scope: !19, file: !3, line: 3, baseType: !9, size: 32, offset: 32) !23 = !DIDerivedType(tag: DW_TAG_member, name: "C", scope: !19, file: !3, line: 3, baseType: !9, size: 32, offset: 64) !24 = !DIDerivedType(tag: DW_TAG_member, name: "Var", scope: !19, file: !3, line: 4, baseType: !9, size: 32, offset: 96) !25 = !DIDerivedType(tag: DW_TAG_member, name: "D", scope: !19, file: !3, line: 5, baseType: !9, size: 32, offset: 128) !26 = !DIDerivedType(tag: DW_TAG_member, name: "E", scope: !19, file: !3, line: 5, baseType: !9, size: 32, offset: 160) !27 = !DIDerivedType(tag: DW_TAG_member, name: "F", scope: !19, file: !3, line: 5, baseType: !9, size: 32, offset: 192) !28 = distinct !DIAssignID() !29 = !DILocation(line: 0, scope: !14) !30 = !DILocation(line: 10, column: 3, scope: !14) !31 = !DILocation(line: 10, column: 15, scope: !14) !32 = distinct !DIAssignID() !33 = !DILocation(line: 11, column: 11, scope: !14) !38 = !DILocation(line: 11, column: 5, scope: !14) !39 = !DILocation(line: 11, column: 9, scope: !14) !42 = distinct !DIAssignID() !43 = !DILocation(line: 12, column: 12, scope: !14) !44 = !DILocation(line: 13, column: 1, scope: !14) !45 = !DILocation(line: 12, column: 3, scope: !14) !1000 = !{i32 7, !"debug-info-assignment-tracking", i1 true}