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1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py2; RUN: opt < %s -S -passes=redundant-dbg-inst-elim | FileCheck %s3 4; All dbg.value with location "!dbg !19" are redundant in the input.5; FIXME: We do not handle non-overlapping/overlapping fragments perfectly yet.6 7define dso_local i16 @main(i16 %a1, i16 %a2) local_unnamed_addr !dbg !7 {8; CHECK-LABEL: @main(9; CHECK-NEXT: entry:10; CHECK-NEXT: br label [[BB0:%.*]]11; CHECK: bb0:12; CHECK-NEXT: #dbg_value(i16 13, [[META13:![0-9]+]], !DIExpression(), [[META16:![0-9]+]])13; CHECK-NEXT: #dbg_value(i16 14, [[META14:![0-9]+]], !DIExpression(), [[META18:![0-9]+]])14; CHECK-NEXT: #dbg_value(i16 13, [[META13]], !DIExpression(), [[META18]])15; CHECK-NEXT: #dbg_value(i16 12, [[META12:![0-9]+]], !DIExpression(), [[META18]])16; CHECK-NEXT: br label [[BB1:%.*]]17; CHECK: bb1:18; CHECK-NEXT: #dbg_value(i16 [[A1:%.*]], [[META14]], !DIExpression(), [[META18]])19; CHECK-NEXT: #dbg_value(i16 888, [[META13]], !DIExpression(), [[META18]])20; CHECK-NEXT: #dbg_value(i16 [[A2:%.*]], [[META12]], !DIExpression(), [[META18]])21; CHECK-NEXT: [[T1:%.*]] = call i16 @bar(i16 0)22; CHECK-NEXT: #dbg_value(i16 [[T1]], [[META13]], !DIExpression(), [[META18]])23; CHECK-NEXT: #dbg_value(i16 [[A2]], [[META12]], !DIExpression(DW_OP_constu, 2, DW_OP_shr, DW_OP_stack_value), [[META18]])24; CHECK-NEXT: br label [[BB2:%.*]]25; CHECK: bb2:26; CHECK-NEXT: #dbg_declare(i16 %a1, !19, !DIExpression(), [[META18]])27; CHECK-NEXT: #dbg_label([[META21:![0-9]+]], [[META18]])28; CHECK-NEXT: #dbg_value(i16 [[A1]], [[META13]], !DIExpression(DW_OP_LLVM_fragment, 0, 8), [[META18]])29; CHECK-NEXT: #dbg_value(i16 [[A1]], [[META13]], !DIExpression(DW_OP_LLVM_fragment, 8, 8), [[META18]])30; CHECK-NEXT: [[T2:%.*]] = call i16 @bar(i16 [[T1]])31; CHECK-NEXT: #dbg_value(i16 [[T2]], [[META13]], !DIExpression(DW_OP_LLVM_fragment, 0, 8), [[META18]])32; CHECK-NEXT: #dbg_value(i16 [[A1]], [[META13]], !DIExpression(DW_OP_LLVM_fragment, 8, 8), [[META19:![0-9]+]])33; CHECK-NEXT: br label [[BB3:%.*]]34; CHECK: bb3:35; CHECK-NEXT: #dbg_value(i16 [[A1]], [[META13]], !DIExpression(DW_OP_LLVM_fragment, 0, 8), [[META19]])36; CHECK-NEXT: #dbg_value(i16 [[A1]], [[META13]], !DIExpression(), [[META18]])37; CHECK-NEXT: br label [[EXIT:%.*]]38; CHECK: exit:39; CHECK-NEXT: ret i16 [[T2]]40;41entry:42 br label %bb043 44bb0:45 #dbg_value(i16 999, !12, !DIExpression(), !19)46 #dbg_value(i16 996, !13, !DIExpression(), !19)47 #dbg_value(i16 13, !13, !DIExpression(), !17)48 #dbg_value(i16 998, !12, !DIExpression(DW_OP_constu, 2, DW_OP_shr, DW_OP_stack_value), !19)49 #dbg_value(i16 14, !14, !DIExpression(), !16)50 #dbg_value(i16 997, !12, !DIExpression(), !19)51 #dbg_value(i16 13, !13, !DIExpression(), !16)52 #dbg_value(i16 12, !12, !DIExpression(), !16)53 br label %bb154 55bb1:56 #dbg_value(i16 %a1, !14, !DIExpression(), !16)57 #dbg_value(i16 888, !13, !DIExpression(), !16)58 #dbg_value(i16 %a2, !12, !DIExpression(), !16)59 %t1 = call i16 @bar(i16 0)60 #dbg_value(i16 %a1, !14, !DIExpression(), !19)61 #dbg_value(i16 %t1, !13, !DIExpression(), !16)62 #dbg_value(i16 %a2, !12, !DIExpression(DW_OP_constu, 2, DW_OP_shr, DW_OP_stack_value), !16)63 br label %bb264 65bb2:66 #dbg_value(i16 %a1, !13, !DIExpression(DW_OP_LLVM_fragment, 0, 8), !19)67 #dbg_value(i16 %a1, !13, !DIExpression(DW_OP_LLVM_fragment, 8, 8), !19)68 ; Check dbg_declare and dbg_label don't interfere with the backward scan.69 #dbg_declare(i16 %a1, !21, !DIExpression(), !16)70 #dbg_label(!20, !16)71 #dbg_value(i16 %a1, !13, !DIExpression(DW_OP_LLVM_fragment, 0, 8), !16)72 #dbg_value(i16 %a1, !13, !DIExpression(DW_OP_LLVM_fragment, 8, 8), !16)73 %t2 = call i16 @bar(i16 %t1)74 #dbg_value(i16 %t2, !13, !DIExpression(DW_OP_LLVM_fragment, 0, 8), !16)75 #dbg_value(i16 %a1, !13, !DIExpression(DW_OP_LLVM_fragment, 8, 8), !19)76 br label %bb377 78bb3:79 #dbg_value(i16 %a1, !13, !DIExpression(DW_OP_LLVM_fragment, 0, 8), !19)80 #dbg_value(i16 %a1, !13, !DIExpression(), !16)81 br label %exit82 83exit:84 ret i16 %t285}86 87declare i16 @bar(i16)88 89!llvm.dbg.cu = !{!0}90!llvm.module.flags = !{!3, !4, !5}91!llvm.ident = !{!6}92 93!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 10.0.0", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, globals: !2, nameTableKind: None)94!1 = !DIFile(filename: "foo.c", directory: "")95!2 = !{}96!3 = !{i32 7, !"Dwarf Version", i32 4}97!4 = !{i32 2, !"Debug Info Version", i32 3}98!5 = !{i32 1, !"wchar_size", i32 1}99!6 = !{!"clang version 10.0.0"}100!7 = distinct !DISubprogram(name: "main", scope: !1, file: !1, line: 8, type: !8, scopeLine: 8, flags: DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !11)101!8 = !DISubroutineType(types: !9)102!9 = !{!10}103!10 = !DIBasicType(name: "int", size: 16, encoding: DW_ATE_signed)104!11 = !{!12, !13, !14}105!12 = !DILocalVariable(name: "x", scope: !7, file: !1, line: 9, type: !10)106!13 = !DILocalVariable(name: "y", scope: !7, file: !1, line: 10, type: !10)107!14 = !DILocalVariable(name: "u", scope: !15, file: !1, line: 11, type: !10)108!15 = distinct !DILexicalBlock(scope: !7, file: !1, line: 11, column: 3)109!16 = !DILocation(line: 0, scope: !7)110!17 = !DILocation(line: 0, scope: !7, inlinedAt: !18)111!18 = !DILocation(line: 1, scope: !7)112!19 = !DILocation(line: 77, scope: !7)113!20 = !DILabel(scope: !7, name: "label", file: !1, line: 3)114!21 = !DILocalVariable(name: "z", scope: !7, file: !1, line: 10, type: !10)115