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1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py2; Test that the getelementptr generated when the dse pass determines that3; a memset can be shortened has the debugloc carried over from the memset.4 5; RUN: opt -S -march=native -passes=dse < %s| FileCheck %s6; CHECK: %{{[0-9]+}} = getelementptr inbounds i8, ptr %b, i64 32, !dbg ![[DBG:[0-9]+]]7; CHECK-NEXT: call void @llvm.memset.p0.i64(ptr align 16 %0, i8 0, i64 8, i1 false), !dbg ![[DBG:[0-9]+]]8; CHECK: ![[DBG]] = !DILocation(line: 2,9 10; The test IR is generated by running:11;12; clang Debugify_Dead_Store_Elimination.cpp -Wno-c++11-narrowing -S \13; -emit-llvm -O0 -w -Xclang -disable-O0-optnone -march=native -fdeclspec \14; --target=x86_64-gnu-linux-unknown -Werror=unreachable-code -o -15;16; Where Debugify_Dead_Store_Elimination.cpp contains:17;18; int a() {19; long b[]{2, 2, 2, 2, 0};20; if (a())21; ;22; }23 24 25declare void @use(ptr)26 27define dso_local i32 @_Z1av() !dbg !7 {28entry:29 %retval = alloca i32, align 430 %b = alloca [5 x i64], align 1631 call void @llvm.dbg.declare(metadata ptr %b, metadata !11, metadata !DIExpression()), !dbg !1632 call void @llvm.memset.p0.i64(ptr align 16 %b, i8 0, i64 40, i1 false), !dbg !1633 store i64 2, ptr %b, align 16, !dbg !1634 %0 = getelementptr inbounds [5 x i64], ptr %b, i32 0, i32 1, !dbg !1635 store i64 2, ptr %0, align 8, !dbg !1636 %1 = getelementptr inbounds [5 x i64], ptr %b, i32 0, i32 2, !dbg !1637 store i64 2, ptr %1, align 16, !dbg !1638 %2 = getelementptr inbounds [5 x i64], ptr %b, i32 0, i32 3, !dbg !1639 store i64 2, ptr %2, align 8, !dbg !1640 call void @use(ptr %b)41 %call = call i32 @_Z1av(), !dbg !1742 %tobool = icmp ne i32 %call, 0, !dbg !1743 br i1 %tobool, label %if.then, label %if.end, !dbg !1944 45if.then: ; preds = %entry46 br label %if.end, !dbg !1947 48if.end: ; preds = %if.then, %entry49 call void @llvm.trap(), !dbg !2050 unreachable, !dbg !2051 52return: ; No predecessors!53 %3 = load i32, ptr %retval, align 4, !dbg !2154 ret i32 %3, !dbg !2155}56 57; Function Attrs: nounwind readnone speculatable58declare void @llvm.dbg.declare(metadata, metadata, metadata)59 60; Function Attrs: argmemonly nounwind61declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg)62 63; Function Attrs: cold noreturn nounwind64declare void @llvm.trap()65 66!llvm.module.flags = !{!3, !4, !5}67!llvm.ident = !{!6}68 69!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, producer: "clang version 9.0.0 (https://github.com/llvm/llvm-project.git eb1a156d7f7ba56ea8f9a26da36e6a93d1e98bda)", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, nameTableKind: None)70!1 = !DIFile(filename: "Debugify_Dead_Store_Elimination.cpp", directory: "")71!2 = !{}72!3 = !{i32 2, !"Dwarf Version", i32 4}73!4 = !{i32 2, !"Debug Info Version", i32 3}74!5 = !{i32 1, !"wchar_size", i32 4}75!6 = !{!"clang version 9.0.0 (https://github.com/llvm/llvm-project.git eb1a156d7f7ba56ea8f9a26da36e6a93d1e98bda)"}76!7 = distinct !DISubprogram(name: "a", linkageName: "_Z1av", scope: !1, file: !1, line: 1, type: !8, scopeLine: 1, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition, unit: !0, retainedNodes: !2)77!8 = !DISubroutineType(types: !9)78!9 = !{!10}79!10 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)80!11 = !DILocalVariable(name: "b", scope: !7, file: !1, line: 2, type: !12)81!12 = !DICompositeType(tag: DW_TAG_array_type, baseType: !13, size: 320, elements: !14)82!13 = !DIBasicType(name: "long int", size: 64, encoding: DW_ATE_signed)83!14 = !{!15}84!15 = !DISubrange(count: 5)85!16 = !DILocation(line: 2, column: 8, scope: !7)86!17 = !DILocation(line: 3, column: 7, scope: !18)87!18 = distinct !DILexicalBlock(scope: !7, file: !1, line: 3, column: 7)88!19 = !DILocation(line: 3, column: 7, scope: !7)89!20 = !DILocation(line: 3, column: 9, scope: !18)90!21 = !DILocation(line: 5, column: 1, scope: !7)91