1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py 2; Test that the getelementptr generated when the dse pass determines that 3; a memset can be shortened has the debugloc carried over from the memset. 4 5; RUN: opt -S -march=native -dse < %s| FileCheck %s 6; CHECK: bitcast [5 x i64]* %{{[a-zA-Z_][a-zA-Z0-9_]*}} to i8*, !dbg 7; CHECK-NEXT: %{{[0-9]+}} = getelementptr inbounds i8, i8* %0, i64 32, !dbg ![[DBG:[0-9]+]] 8; CHECK-NEXT: call void @llvm.memset.p0i8.i64(i8* align 16 %1, i8 0, i64 8, i1 false), !dbg ![[DBG:[0-9]+]] 9; CHECK: ![[DBG]] = !DILocation(line: 2, 10 11; The test IR is generated by running: 12; 13; clang Debugify_Dead_Store_Elimination.cpp -Wno-c++11-narrowing -S \ 14; -emit-llvm -O0 -w -Xclang -disable-O0-optnone -march=native -fdeclspec \ 15; --target=x86_64-gnu-linux-unknown -Werror=unreachable-code -o - 16; 17; Where Debugify_Dead_Store_Elimination.cpp contains: 18; 19; int a() { 20; long b[]{2, 2, 2, 2, 0}; 21; if (a()) 22; ; 23; } 24 25 26declare void @use([5 x i64]*) 27 28define dso_local i32 @_Z1av() !dbg !7 { 29entry: 30 %retval = alloca i32, align 4 31 %b = alloca [5 x i64], align 16 32 call void @llvm.dbg.declare(metadata [5 x i64]* %b, metadata !11, metadata !DIExpression()), !dbg !16 33 %0 = bitcast [5 x i64]* %b to i8*, !dbg !16 34 call void @llvm.memset.p0i8.i64(i8* align 16 %0, i8 0, i64 40, i1 false), !dbg !16 35 %1 = bitcast i8* %0 to [5 x i64]*, !dbg !16 36 %2 = getelementptr inbounds [5 x i64], [5 x i64]* %1, i32 0, i32 0, !dbg !16 37 store i64 2, i64* %2, align 16, !dbg !16 38 %3 = getelementptr inbounds [5 x i64], [5 x i64]* %1, i32 0, i32 1, !dbg !16 39 store i64 2, i64* %3, align 8, !dbg !16 40 %4 = getelementptr inbounds [5 x i64], [5 x i64]* %1, i32 0, i32 2, !dbg !16 41 store i64 2, i64* %4, align 16, !dbg !16 42 %5 = getelementptr inbounds [5 x i64], [5 x i64]* %1, i32 0, i32 3, !dbg !16 43 store i64 2, i64* %5, align 8, !dbg !16 44 call void @use([5 x i64]* %b) 45 %call = call i32 @_Z1av(), !dbg !17 46 %tobool = icmp ne i32 %call, 0, !dbg !17 47 br i1 %tobool, label %if.then, label %if.end, !dbg !19 48 49if.then: ; preds = %entry 50 br label %if.end, !dbg !19 51 52if.end: ; preds = %if.then, %entry 53 call void @llvm.trap(), !dbg !20 54 unreachable, !dbg !20 55 56return: ; No predecessors! 57 %6 = load i32, i32* %retval, align 4, !dbg !21 58 ret i32 %6, !dbg !21 59} 60 61; Function Attrs: nounwind readnone speculatable 62declare void @llvm.dbg.declare(metadata, metadata, metadata) 63 64; Function Attrs: argmemonly nounwind 65declare void @llvm.memset.p0i8.i64(i8* nocapture writeonly, i8, i64, i1 immarg) 66 67; Function Attrs: cold noreturn nounwind 68declare void @llvm.trap() 69 70!llvm.module.flags = !{!3, !4, !5} 71!llvm.ident = !{!6} 72 73!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) 74!1 = !DIFile(filename: "Debugify_Dead_Store_Elimination.cpp", directory: "") 75!2 = !{} 76!3 = !{i32 2, !"Dwarf Version", i32 4} 77!4 = !{i32 2, !"Debug Info Version", i32 3} 78!5 = !{i32 1, !"wchar_size", i32 4} 79!6 = !{!"clang version 9.0.0 (https://github.com/llvm/llvm-project.git eb1a156d7f7ba56ea8f9a26da36e6a93d1e98bda)"} 80!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) 81!8 = !DISubroutineType(types: !9) 82!9 = !{!10} 83!10 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed) 84!11 = !DILocalVariable(name: "b", scope: !7, file: !1, line: 2, type: !12) 85!12 = !DICompositeType(tag: DW_TAG_array_type, baseType: !13, size: 320, elements: !14) 86!13 = !DIBasicType(name: "long int", size: 64, encoding: DW_ATE_signed) 87!14 = !{!15} 88!15 = !DISubrange(count: 5) 89!16 = !DILocation(line: 2, column: 8, scope: !7) 90!17 = !DILocation(line: 3, column: 7, scope: !18) 91!18 = distinct !DILexicalBlock(scope: !7, file: !1, line: 3, column: 7) 92!19 = !DILocation(line: 3, column: 7, scope: !7) 93!20 = !DILocation(line: 3, column: 9, scope: !18) 94!21 = !DILocation(line: 5, column: 1, scope: !7) 95