1; RUN: opt -S %s -passes=loop-deletion | FileCheck %s 2; RUN: opt -S %s -passes=loop-deletion --try-experimental-debuginfo-iterators | FileCheck %s 3 4;; static int foo(int Param) __attribute__((always_inline)); 5;; static int foo(int Param) { return Param * Param * 2; } 6;; 7;; static int zero() __attribute__((always_inline)); 8;; static int zero() { return 0; } 9;; 10;; void test() { 11;; int Constant = 0; 12;; for (int Index = zero(); Index < 0; ++Index) { 13;; foo(Index); 14;; Constant = 5; 15;; foo(Index + 1); 16;; } 17;; } 18;; 19;; Check that a loop invariant value in a dbg.value inside the dead 20;; loop is preserved. 21 22; CHECK-LABEL: for.end: 23; CHECK-NEXT: #dbg_value({{.+}} undef, ![[VAR1:[0-9]+]],{{.+}}, ![[DBG1:[0-9]+]] 24; CHECK-NEXT: #dbg_value({{.+}} 5, ![[VAR2:[0-9]+]],{{.+}}, ![[DBG2:[0-9]+]] 25 26; CHECK-DAG: ![[VAR1]] = !DILocalVariable(name: "Index" 27; CHECK-DAG: ![[VAR2]] = !DILocalVariable(name: "Constant" 28 29; CHECK-DAG: ![[DBG1]] = !DILocation(line: 0 30; CHECK-DAG: ![[DBG2]] = !DILocation(line: 0 31 32define dso_local void @test() !dbg !9 { 33entry: 34 call void @llvm.dbg.value(metadata i32 0, metadata !13, metadata !DIExpression()), !dbg !15 35 call void @llvm.dbg.value(metadata i32 0, metadata !16, metadata !DIExpression()), !dbg !18 36 br label %for.end, !dbg !19 37 38for.end: ; preds = %entry 39 call void @llvm.dbg.value(metadata i32 undef, metadata !16, metadata !DIExpression()), !dbg !18 40 call void @llvm.dbg.value(metadata i32 5, metadata !13, metadata !DIExpression()), !dbg !15 41 ret void, !dbg !30 42} 43 44declare void @llvm.dbg.value(metadata, metadata, metadata) 45 46!llvm.dbg.cu = !{!0} 47!llvm.module.flags = !{!2, !3, !4, !5, !6, !7} 48!llvm.ident = !{!8} 49 50!0 = distinct !DICompileUnit(language: DW_LANG_C11, file: !1, producer: "clang version 17.0.0", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, splitDebugInlining: false, nameTableKind: None) 51!1 = !DIFile(filename: "test", directory: "", checksumkind: CSK_MD5, checksum: "53f7b620ca60e4fc7af4e6e4cdac8eea") 52!2 = !{i32 2, !"CodeView", i32 1} 53!3 = !{i32 2, !"Debug Info Version", i32 3} 54!4 = !{i32 1, !"wchar_size", i32 2} 55!5 = !{i32 8, !"PIC Level", i32 2} 56!6 = !{i32 7, !"uwtable", i32 2} 57!7 = !{i32 1, !"MaxTLSAlign", i32 65536} 58!8 = !{!"clang version 17.0.0"} 59!9 = distinct !DISubprogram(name: "test", scope: !1, file: !1, line: 7, type: !10, scopeLine: 7, spFlags: DISPFlagDefinition, unit: !0, retainedNodes: !12) 60!10 = !DISubroutineType(types: !11) 61!11 = !{null} 62!12 = !{} 63!13 = !DILocalVariable(name: "Constant", scope: !9, file: !1, line: 8, type: !14) 64!14 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed) 65!15 = !DILocation(line: 0, scope: !9) 66!16 = !DILocalVariable(name: "Index", scope: !17, file: !1, line: 9, type: !14) 67!17 = distinct !DILexicalBlock(scope: !9, file: !1, line: 9) 68!18 = !DILocation(line: 0, scope: !17) 69!19 = !DILocation(line: 9, scope: !17) 70!21 = distinct !DISubprogram(name: "foo", scope: !1, file: !1, line: 2, type: !22, scopeLine: 2, flags: DIFlagPrototyped, spFlags: DISPFlagLocalToUnit | DISPFlagDefinition, unit: !0, retainedNodes: !12) 71!22 = !DISubroutineType(types: !23) 72!23 = !{!14, !14} 73!24 = !DILocation(line: 0, scope: !21, inlinedAt: !25) 74!25 = distinct !DILocation(line: 10, scope: !26) 75!26 = distinct !DILexicalBlock(scope: !27, file: !1, line: 9) 76!27 = distinct !DILexicalBlock(scope: !17, file: !1, line: 9) 77!28 = !DILocation(line: 0, scope: !21, inlinedAt: !29) 78!29 = distinct !DILocation(line: 12, scope: !26) 79!30 = !DILocation(line: 14, scope: !9) 80