; RUN: opt %s -S -passes=instcombine -o - \ ; RUN: | FileCheck %s ; RUN: opt --try-experimental-debuginfo-iterators %s -S -passes=instcombine -o - \ ; RUN: | FileCheck %s ;; $ cat test.cpp ;; void esc(int*); ;; void fun() { ;; int local[5]; ;; __builtin_memset(local, 8, 4 * 4); ;; __builtin_memset(local, 0, 2 * 4); ;; esc(local); ;; } ;; IR grabbed before instcombine in: ;; clang++ -O2 -g -Xclang -fexperimental-assignment-tracking ;; Instcombine is going to turn the second memset into a store. Check that it ;; inherits the DIAssignID from the memset and that the dbg.assign's value ;; component is correct. ; CHECK: store i64 0, ptr %local, align 16{{.*}}, !DIAssignID ![[ID:[0-9]+]] ; CHECK-NEXT: call void @llvm.dbg.assign(metadata i64 0, metadata !{{.*}}, metadata !DIExpression(DW_OP_LLVM_fragment, 0, 64), metadata ![[ID]], metadata ptr %local, metadata !DIExpression()) define dso_local void @_Z3funv() local_unnamed_addr #0 !dbg !7 { entry: %local = alloca [5 x i32], align 16, !DIAssignID !16 call void @llvm.dbg.assign(metadata i1 undef, metadata !11, metadata !DIExpression(), metadata !16, metadata ptr %local, metadata !DIExpression()), !dbg !17 %0 = bitcast ptr %local to ptr, !dbg !18 call void @llvm.lifetime.start.p0i8(i64 20, ptr %0) #5, !dbg !18 %arraydecay = getelementptr inbounds [5 x i32], ptr %local, i64 0, i64 0, !dbg !19 %1 = bitcast ptr %arraydecay to ptr, !dbg !19 call void @llvm.memset.p0i8.i64(ptr align 16 %1, i8 8, i64 16, i1 false), !dbg !19, !DIAssignID !20 call void @llvm.dbg.assign(metadata i8 8, metadata !11, metadata !DIExpression(DW_OP_LLVM_fragment, 0, 128), metadata !20, metadata ptr %1, metadata !DIExpression()), !dbg !17 call void @llvm.memset.p0i8.i64(ptr align 16 %1, i8 0, i64 8, i1 false), !dbg !21, !DIAssignID !22 call void @llvm.dbg.assign(metadata i8 0, metadata !11, metadata !DIExpression(DW_OP_LLVM_fragment, 0, 64), metadata !22, metadata ptr %1, metadata !DIExpression()), !dbg !17 call void @_Z3escPi(ptr noundef %arraydecay), !dbg !23 call void @llvm.lifetime.end.p0i8(i64 20, ptr %0) #5, !dbg !24 ret void, !dbg !24 } declare void @llvm.lifetime.start.p0i8(i64 immarg, ptr nocapture) declare void @llvm.memset.p0i8.i64(ptr nocapture writeonly, i8, i64, i1 immarg) declare !dbg !25 dso_local void @_Z3escPi(ptr noundef) local_unnamed_addr declare void @llvm.lifetime.end.p0i8(i64 immarg, ptr nocapture) declare void @llvm.dbg.assign(metadata, metadata, metadata, metadata, metadata, metadata) !llvm.dbg.cu = !{!0} !llvm.module.flags = !{!2, !3, !4, !5, !1000} !llvm.ident = !{!6} !0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus_14, file: !1, producer: "clang version 14.0.0", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, splitDebugInlining: false, nameTableKind: None) !1 = !DIFile(filename: "test.cpp", directory: "/") !2 = !{i32 7, !"Dwarf Version", i32 5} !3 = !{i32 2, !"Debug Info Version", i32 3} !4 = !{i32 1, !"wchar_size", i32 4} !5 = !{i32 7, !"uwtable", i32 1} !6 = !{!"clang version 14.0.0"} !7 = distinct !DISubprogram(name: "fun", linkageName: "_Z3funv", scope: !1, file: !1, line: 2, type: !8, scopeLine: 2, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !10) !8 = !DISubroutineType(types: !9) !9 = !{null} !10 = !{!11} !11 = !DILocalVariable(name: "local", scope: !7, file: !1, line: 3, type: !12) !12 = !DICompositeType(tag: DW_TAG_array_type, baseType: !13, size: 160, elements: !14) !13 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed) !14 = !{!15} !15 = !DISubrange(count: 5) !16 = distinct !DIAssignID() !17 = !DILocation(line: 0, scope: !7) !18 = !DILocation(line: 3, column: 3, scope: !7) !19 = !DILocation(line: 4, column: 3, scope: !7) !20 = distinct !DIAssignID() !21 = !DILocation(line: 5, column: 3, scope: !7) !22 = distinct !DIAssignID() !23 = !DILocation(line: 6, column: 3, scope: !7) !24 = !DILocation(line: 7, column: 1, scope: !7) !25 = !DISubprogram(name: "esc", linkageName: "_Z3escPi", scope: !1, file: !1, line: 1, type: !26, flags: DIFlagPrototyped, spFlags: DISPFlagOptimized, retainedNodes: !29) !26 = !DISubroutineType(types: !27) !27 = !{null, !28} !28 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !13, size: 64) !29 = !{} !1000 = !{i32 7, !"debug-info-assignment-tracking", i1 true}