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@@ -0,0 +1,134 @@ |
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; RUN: opt %s -S -passes=dse -o - | FileCheck %s --implicit-check-not="call void @llvm.dbg" |
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;; Based on the test shorten.ll with some adjustments. |
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;; |
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;; $ cat test.cpp |
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;; void esc(char*); |
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;; void shortenEnd() { |
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;; char local[80]; // bits frag |
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;; __builtin_memset(local + 8, 0, 24); // local: 64-160 ( 64, 96) |
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;; __builtin_memset(local + 16, 8, 40); // local: 128-160 (128, 32) |
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;; esc(local); |
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;; } |
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;; void shortenStart() { |
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;; char local2[40]; // bits frag |
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;; __builtin_memset(local2, 0, 40); // local2: 0-160 (0, 160) |
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;; __builtin_memset(local2, 8, 16); // local2: 0-128 (0, 128) |
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;; esc(local2); |
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;; } |
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;; The variables and intrinsics have been adjusted with by hand to test |
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;; what happens when the variable doesn't fill the whole alloca, and |
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;; when offsets are encoded with both the address component of the dbg.assign |
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;; and the address modifying DIExpression. |
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;; DeadStoreElimination will shorten the first store in shortenEnd from [64, |
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;; 192) bits to [64, 128) bits. Variable 'local' has been adjusted to be 160 |
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;; bits large. Check that we get an unlinked dbg.assign covering the deleted |
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;; bits that overlap the dbg.assign's fagment: [128, 160) (offset=128 size=32). |
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; CHECK: @_Z10shortenEndv |
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; CHECK: call void @llvm.dbg.assign({{.*}}, metadata ptr %local, metadata !DIExpression()) |
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; CHECK: call void @llvm.memset{{.*}}, !DIAssignID ![[ID:[0-9]+]] |
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; CHECK-NEXT: call void @llvm.dbg.assign(metadata i8 0, metadata ![[VAR:[0-9]+]], metadata !DIExpression(DW_OP_LLVM_fragment, 64, 96), metadata ![[ID:[0-9]+]], metadata ptr %offset_4_bytes, metadata !DIExpression(DW_OP_plus_uconst, 4)) |
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; CHECK-NEXT: call void @llvm.dbg.assign(metadata i8 0, metadata ![[VAR]], metadata !DIExpression(DW_OP_LLVM_fragment, 128, 32), metadata ![[UniqueID1:[0-9]+]], metadata ptr undef, metadata !DIExpression({{.*}})) |
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;; DSE will shorten the first store in shortenStart from [0, 160) bits to [128, |
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;; 160) bits. Variable 'local2' has been adjusted to be 160 bits. Check we get |
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;; an unlinked dbg.assign covering the deleted bits that overlap the |
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;; dbg.assign's fragment (no fragment in this case, i.e. the whole variable): |
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;; [0, 128) (offset=0, size=128). |
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; CHECK: @_Z12shortenStartv |
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; CHECK: call void @llvm.dbg.assign({{.*}}, metadata ptr %local2, metadata !DIExpression()) |
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; CHECK: call void @llvm.memset{{.*}}, !DIAssignID ![[ID2:[0-9]+]] |
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; CHECK-NEXT: call void @llvm.dbg.assign(metadata i8 0, metadata ![[VAR2:[0-9]+]], metadata !DIExpression(), metadata ![[ID2]], metadata ptr %local2, metadata !DIExpression()) |
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; CHECK-NEXT: call void @llvm.dbg.assign(metadata i8 0, metadata ![[VAR2]], metadata !DIExpression(DW_OP_LLVM_fragment, 0, 128), metadata ![[UniqueID2:[0-9]+]], metadata ptr undef, metadata !DIExpression()) |
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; CHECK-DAG: ![[ID]] = distinct !DIAssignID() |
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; CHECK-DAG: ![[UniqueID1]] = distinct !DIAssignID() |
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; CHECK-DAG: ![[UniqueID2]] = distinct !DIAssignID() |
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define dso_local void @_Z10shortenEndv() local_unnamed_addr #0 !dbg !7 { |
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entry: |
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%local = alloca [80 x i8], 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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%arraydecay = getelementptr inbounds [80 x i8], ptr %local, i64 0, i64 0, !dbg !19 |
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%offset_4_bytes = getelementptr inbounds [80 x i8], ptr %local, i64 0, i64 4, !dbg !21 |
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%offset_8_bytes = getelementptr inbounds [80 x i8], ptr %local, i64 0, i64 8, !dbg !21 |
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call void @llvm.memset.p0i8.i64(ptr noundef nonnull align 16 dereferenceable(24) %offset_8_bytes, i8 0, i64 72, i1 false), !dbg !19, !DIAssignID !20 |
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call void @llvm.dbg.assign(metadata i8 0, metadata !11, metadata !DIExpression(DW_OP_LLVM_fragment, 64, 96), metadata !20, metadata ptr %offset_4_bytes, metadata !DIExpression(DW_OP_plus_uconst, 4)), !dbg !17 |
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%offset_16_bytes = getelementptr inbounds [80 x i8], ptr %local, i64 0, i64 4, !dbg !21 |
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call void @llvm.memset.p0i8.i64(ptr noundef nonnull align 16 dereferenceable(40) %offset_16_bytes, i8 8, i64 64, i1 false), !dbg !22, !DIAssignID !23 |
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call void @_Z3escPi(ptr noundef nonnull %arraydecay), !dbg !24 |
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ret void, !dbg !25 |
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} |
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declare void @llvm.memset.p0i8.i64(ptr nocapture writeonly, i8, i64, i1 immarg) |
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declare !dbg !26 dso_local void @_Z3escPi(ptr noundef) local_unnamed_addr |
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define dso_local void @_Z12shortenStartv() local_unnamed_addr #0 !dbg !31 { |
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entry: |
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%local2 = alloca [40 x i8], align 16, !DIAssignID !37 |
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call void @llvm.dbg.assign(metadata i1 undef, metadata !33, metadata !DIExpression(), metadata !37, metadata ptr %local2, metadata !DIExpression()), !dbg !38 |
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%arraydecay = getelementptr inbounds [40 x i8], ptr %local2, i64 0, i64 0, !dbg !40 |
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call void @llvm.memset.p0i8.i64(ptr noundef nonnull align 16 dereferenceable(40) %local2, i8 0, i64 36, i1 false), !dbg !40, !DIAssignID !41 |
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call void @llvm.dbg.assign(metadata i8 0, metadata !33, metadata !DIExpression(), metadata !41, metadata ptr %local2, metadata !DIExpression()), !dbg !38 |
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call void @llvm.memset.p0i8.i64(ptr noundef nonnull align 16 dereferenceable(16) %local2, i8 8, i64 16, i1 false), !dbg !42, !DIAssignID !43 |
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call void @_Z3escPi(ptr noundef nonnull %arraydecay), !dbg !44 |
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ret void, !dbg !45 |
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} |
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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: "shortenEnd", linkageName: "_Z10shortenEndv", 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: 26, scope: !7) |
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!22 = !DILocation(line: 5, column: 3, scope: !7) |
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!23 = distinct !DIAssignID() |
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!24 = !DILocation(line: 6, column: 3, scope: !7) |
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!25 = !DILocation(line: 7, column: 1, scope: !7) |
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!26 = !DISubprogram(name: "esc", linkageName: "_Z3escPi", scope: !1, file: !1, line: 1, type: !27, flags: DIFlagPrototyped, spFlags: DISPFlagOptimized, retainedNodes: !30) |
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!27 = !DISubroutineType(types: !28) |
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!28 = !{null, !29} |
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!29 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !13, size: 64) |
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!30 = !{} |
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!31 = distinct !DISubprogram(name: "shortenStart", linkageName: "_Z12shortenStartv", scope: !1, file: !1, line: 8, type: !8, scopeLine: 8, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !32) |
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!32 = !{!33} |
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!33 = !DILocalVariable(name: "local2", scope: !31, file: !1, line: 9, type: !34) |
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!34 = !DICompositeType(tag: DW_TAG_array_type, baseType: !13, size: 160, elements: !35) |
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!35 = !{!36} |
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!36 = !DISubrange(count: 5) |
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!37 = distinct !DIAssignID() |
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!38 = !DILocation(line: 0, scope: !31) |
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!39 = !DILocation(line: 9, column: 3, scope: !31) |
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!40 = !DILocation(line: 10, column: 3, scope: !31) |
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!41 = distinct !DIAssignID() |
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!42 = !DILocation(line: 11, column: 3, scope: !31) |
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!43 = distinct !DIAssignID() |
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!44 = !DILocation(line: 12, column: 3, scope: !31) |
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!45 = !DILocation(line: 13, column: 1, scope: !31) |
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!1000 = !{i32 7, !"debug-info-assignment-tracking", i1 true} |