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57 lines
3.1 KiB
LLVM
57 lines
3.1 KiB
LLVM
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; RUN: opt %s -dce -S | FileCheck %s
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; Tests the salvaging of GEP instructions, specifically struct indexing and
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; non-constant array indexing.
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%struct.S = type { i32, i32 }
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; CHECK: call void @llvm.dbg.value(metadata !DIArgList(%struct.S* %ptr, i64 %offset),
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; CHECK-SAME: ![[VAR_OFFSET_PTR:[0-9]+]],
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; CHECK-SAME: !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_LLVM_arg, 1, DW_OP_constu, 8, DW_OP_mul, DW_OP_plus, DW_OP_plus_uconst, 4, DW_OP_stack_value))
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; CHECK: ![[VAR_OFFSET_PTR]] = !DILocalVariable(name: "offset_ptr"
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define void @"?foo@@YAXPEAUS@@_J@Z"(%struct.S* %ptr, i64 %offset) !dbg !8 {
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entry:
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call void @llvm.dbg.value(metadata i64 %offset, metadata !20, metadata !DIExpression()), !dbg !24
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call void @llvm.dbg.value(metadata %struct.S* %ptr, metadata !21, metadata !DIExpression()), !dbg !24
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%arrayidx = getelementptr inbounds %struct.S, %struct.S* %ptr, i64 %offset, !dbg !25
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%b = getelementptr inbounds %struct.S, %struct.S* %arrayidx, i32 0, i32 1, !dbg !25
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call void @llvm.dbg.value(metadata i32* %b, metadata !22, metadata !DIExpression()), !dbg !24
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ret void, !dbg !26
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}
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declare void @llvm.dbg.value(metadata, metadata, metadata)
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!3, !4, !5, !6}
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!llvm.ident = !{!7}
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!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus_14, file: !1, producer: "clang version 11.0.0", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, nameTableKind: None)
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!1 = !DIFile(filename: "salvage-gep.cpp", directory: "/")
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!2 = !{}
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!3 = !{i32 2, !"CodeView", i32 1}
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!4 = !{i32 2, !"Debug Info Version", i32 3}
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!5 = !{i32 1, !"wchar_size", i32 2}
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!6 = !{i32 7, !"PIC Level", i32 2}
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!7 = !{!"clang version 11.0.0"}
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!8 = distinct !DISubprogram(name: "foo", linkageName: "?foo@@YAXPEAUS@@_J@Z", scope: !9, file: !9, line: 7, type: !10, scopeLine: 7, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !19)
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!9 = !DIFile(filename: ".\\salvage-gep.cpp", directory: "/")
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!10 = !DISubroutineType(types: !11)
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!11 = !{null, !12, !18}
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!12 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !13, size: 64)
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!13 = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "S", file: !9, line: 2, size: 64, flags: DIFlagTypePassByValue, elements: !14, identifier: ".?AUS@@")
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!14 = !{!15, !17}
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!15 = !DIDerivedType(tag: DW_TAG_member, name: "a", scope: !13, file: !9, line: 3, baseType: !16, size: 32)
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!16 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
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!17 = !DIDerivedType(tag: DW_TAG_member, name: "b", scope: !13, file: !9, line: 4, baseType: !16, size: 32, offset: 32)
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!18 = !DIBasicType(name: "long long int", size: 64, encoding: DW_ATE_signed)
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!19 = !{!20, !21, !22}
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!20 = !DILocalVariable(name: "offset", arg: 2, scope: !8, file: !9, line: 7, type: !18)
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!21 = !DILocalVariable(name: "ptr", arg: 1, scope: !8, file: !9, line: 7, type: !12)
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!22 = !DILocalVariable(name: "offset_ptr", scope: !8, file: !9, line: 8, type: !23)
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!23 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !16, size: 64)
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!24 = !DILocation(line: 0, scope: !8)
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!25 = !DILocation(line: 8, scope: !8)
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!26 = !DILocation(line: 9, scope: !8)
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