; RUN: opt -S %s -passes=loop-deletion | FileCheck %s ; RUN: opt -S %s -passes=loop-deletion --try-experimental-debuginfo-iterators | FileCheck %s ;; static int foo(int Param) __attribute__((always_inline)); ;; static int foo(int Param) { return Param * Param * 2; } ;; ;; static int zero() __attribute__((always_inline)); ;; static int zero() { return 0; } ;; ;; void test() { ;; int Constant = 0; ;; for (int Index = zero(); Index < 0; ++Index) { ;; foo(Index); ;; Constant = 5; ;; foo(Index + 1); ;; } ;; } ;; ;; Check that a loop invariant value in a dbg.value inside the dead ;; loop is preserved. ; CHECK-LABEL: for.end: ; CHECK-NEXT: @llvm.dbg.value({{.+}} undef, metadata ![[VAR1:[0-9]+]],{{.+}}), !dbg ![[DBG1:[0-9]+]] ; CHECK-NEXT: @llvm.dbg.value({{.+}} 5, metadata ![[VAR2:[0-9]+]],{{.+}}), !dbg ![[DBG2:[0-9]+]] ; CHECK-DAG: ![[VAR1]] = !DILocalVariable(name: "Index" ; CHECK-DAG: ![[VAR2]] = !DILocalVariable(name: "Constant" ; CHECK-DAG: ![[DBG1]] = !DILocation(line: 0 ; CHECK-DAG: ![[DBG2]] = !DILocation(line: 0 define dso_local void @test() !dbg !9 { entry: call void @llvm.dbg.value(metadata i32 0, metadata !13, metadata !DIExpression()), !dbg !15 call void @llvm.dbg.value(metadata i32 0, metadata !16, metadata !DIExpression()), !dbg !18 br label %for.end, !dbg !19 for.end: ; preds = %entry call void @llvm.dbg.value(metadata i32 undef, metadata !16, metadata !DIExpression()), !dbg !18 call void @llvm.dbg.value(metadata i32 5, metadata !13, metadata !DIExpression()), !dbg !15 ret void, !dbg !30 } declare void @llvm.dbg.value(metadata, metadata, metadata) !llvm.dbg.cu = !{!0} !llvm.module.flags = !{!2, !3, !4, !5, !6, !7} !llvm.ident = !{!8} !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) !1 = !DIFile(filename: "test", directory: "", checksumkind: CSK_MD5, checksum: "53f7b620ca60e4fc7af4e6e4cdac8eea") !2 = !{i32 2, !"CodeView", i32 1} !3 = !{i32 2, !"Debug Info Version", i32 3} !4 = !{i32 1, !"wchar_size", i32 2} !5 = !{i32 8, !"PIC Level", i32 2} !6 = !{i32 7, !"uwtable", i32 2} !7 = !{i32 1, !"MaxTLSAlign", i32 65536} !8 = !{!"clang version 17.0.0"} !9 = distinct !DISubprogram(name: "test", scope: !1, file: !1, line: 7, type: !10, scopeLine: 7, spFlags: DISPFlagDefinition, unit: !0, retainedNodes: !12) !10 = !DISubroutineType(types: !11) !11 = !{null} !12 = !{} !13 = !DILocalVariable(name: "Constant", scope: !9, file: !1, line: 8, type: !14) !14 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed) !15 = !DILocation(line: 0, scope: !9) !16 = !DILocalVariable(name: "Index", scope: !17, file: !1, line: 9, type: !14) !17 = distinct !DILexicalBlock(scope: !9, file: !1, line: 9) !18 = !DILocation(line: 0, scope: !17) !19 = !DILocation(line: 9, scope: !17) !21 = distinct !DISubprogram(name: "foo", scope: !1, file: !1, line: 2, type: !22, scopeLine: 2, flags: DIFlagPrototyped, spFlags: DISPFlagLocalToUnit | DISPFlagDefinition, unit: !0, retainedNodes: !12) !22 = !DISubroutineType(types: !23) !23 = !{!14, !14} !24 = !DILocation(line: 0, scope: !21, inlinedAt: !25) !25 = distinct !DILocation(line: 10, scope: !26) !26 = distinct !DILexicalBlock(scope: !27, file: !1, line: 9) !27 = distinct !DILexicalBlock(scope: !17, file: !1, line: 9) !28 = !DILocation(line: 0, scope: !21, inlinedAt: !29) !29 = distinct !DILocation(line: 12, scope: !26) !30 = !DILocation(line: 14, scope: !9)