81 lines
4.3 KiB
LLVM
81 lines
4.3 KiB
LLVM
; RUN: opt %s -S -passes=instcombine -o - \
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; RUN: | FileCheck %s
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; RUN: opt --try-experimental-debuginfo-iterators %s -S -passes=instcombine -o - \
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; RUN: | FileCheck %s
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;; $ cat test.cpp
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;; void esc(int*);
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;; void fun() {
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;; int local[5];
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;; __builtin_memset(local, 8, 4 * 4);
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;; __builtin_memset(local, 0, 2 * 4);
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;; esc(local);
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;; }
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;; IR grabbed before instcombine in:
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;; clang++ -O2 -g -Xclang -fexperimental-assignment-tracking
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;; Instcombine is going to turn the second memset into a store. Check that it
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;; inherits the DIAssignID from the memset and that the dbg.assign's value
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;; component is correct.
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; CHECK: store i64 0, ptr %local, align 16{{.*}}, !DIAssignID ![[ID:[0-9]+]]
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; 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())
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define dso_local void @_Z3funv() local_unnamed_addr #0 !dbg !7 {
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entry:
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%local = alloca [5 x i32], align 16, !DIAssignID !16
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call void @llvm.dbg.assign(metadata i1 undef, metadata !11, metadata !DIExpression(), metadata !16, metadata ptr %local, metadata !DIExpression()), !dbg !17
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%0 = bitcast ptr %local to ptr, !dbg !18
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call void @llvm.lifetime.start.p0i8(i64 20, ptr %0) #5, !dbg !18
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%arraydecay = getelementptr inbounds [5 x i32], ptr %local, i64 0, i64 0, !dbg !19
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%1 = bitcast ptr %arraydecay to ptr, !dbg !19
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call void @llvm.memset.p0i8.i64(ptr align 16 %1, i8 8, i64 16, i1 false), !dbg !19, !DIAssignID !20
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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
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call void @llvm.memset.p0i8.i64(ptr align 16 %1, i8 0, i64 8, i1 false), !dbg !21, !DIAssignID !22
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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
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call void @_Z3escPi(ptr noundef %arraydecay), !dbg !23
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call void @llvm.lifetime.end.p0i8(i64 20, ptr %0) #5, !dbg !24
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ret void, !dbg !24
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}
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declare void @llvm.lifetime.start.p0i8(i64 immarg, ptr nocapture)
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declare void @llvm.memset.p0i8.i64(ptr nocapture writeonly, i8, i64, i1 immarg)
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declare !dbg !25 dso_local void @_Z3escPi(ptr noundef) local_unnamed_addr
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declare void @llvm.lifetime.end.p0i8(i64 immarg, ptr nocapture)
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declare void @llvm.dbg.assign(metadata, metadata, metadata, metadata, metadata, metadata)
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!2, !3, !4, !5, !1000}
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!llvm.ident = !{!6}
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!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)
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!1 = !DIFile(filename: "test.cpp", directory: "/")
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!2 = !{i32 7, !"Dwarf Version", i32 5}
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!3 = !{i32 2, !"Debug Info Version", i32 3}
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!4 = !{i32 1, !"wchar_size", i32 4}
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!5 = !{i32 7, !"uwtable", i32 1}
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!6 = !{!"clang version 14.0.0"}
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!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)
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!8 = !DISubroutineType(types: !9)
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!9 = !{null}
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!10 = !{!11}
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!11 = !DILocalVariable(name: "local", scope: !7, file: !1, line: 3, type: !12)
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!12 = !DICompositeType(tag: DW_TAG_array_type, baseType: !13, size: 160, elements: !14)
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!13 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
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!14 = !{!15}
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!15 = !DISubrange(count: 5)
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!16 = distinct !DIAssignID()
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!17 = !DILocation(line: 0, scope: !7)
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!18 = !DILocation(line: 3, column: 3, scope: !7)
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!19 = !DILocation(line: 4, column: 3, scope: !7)
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!20 = distinct !DIAssignID()
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!21 = !DILocation(line: 5, column: 3, scope: !7)
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!22 = distinct !DIAssignID()
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!23 = !DILocation(line: 6, column: 3, scope: !7)
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!24 = !DILocation(line: 7, column: 1, scope: !7)
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!25 = !DISubprogram(name: "esc", linkageName: "_Z3escPi", scope: !1, file: !1, line: 1, type: !26, flags: DIFlagPrototyped, spFlags: DISPFlagOptimized, retainedNodes: !29)
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!26 = !DISubroutineType(types: !27)
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!27 = !{null, !28}
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!28 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !13, size: 64)
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!29 = !{}
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!1000 = !{i32 7, !"debug-info-assignment-tracking", i1 true}
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