1; RUN: opt < %s -passes=instcombine -S | FileCheck %s 2; RUN: opt < %s -passes=instcombine -S --try-experimental-debuginfo-iterators | FileCheck %s 3 4; Make sure to update the debug value after dead code elimination. 5; CHECK: %call = call signext i8 @b(i32 6), !dbg !39 6; CHECK-NEXT: #dbg_value(i8 %call, !30, !DIExpression(DW_OP_LLVM_convert, 8, DW_ATE_signed, DW_OP_LLVM_convert, 32, DW_ATE_signed, DW_OP_stack_value), !38 7 8@e = common local_unnamed_addr global i8 0, align 1, !dbg !0 9@c = common local_unnamed_addr global i32 0, align 4, !dbg !6 10@d = common local_unnamed_addr global i32 0, align 4, !dbg !10 11 12define signext i8 @b(i32 %f) local_unnamed_addr #0 !dbg !18 { 13entry: 14 call void @llvm.dbg.value(metadata i32 %f, metadata !22, metadata !DIExpression()), !dbg !23 15 %conv = trunc i32 %f to i8, !dbg !24 16 ret i8 %conv, !dbg !25 17} 18 19define i32 @main() local_unnamed_addr #0 !dbg !26 { 20entry: 21 %0 = load i8, ptr @e, align 1, !dbg !31, !tbaa !32 22 %conv = sext i8 %0 to i32, !dbg !31 23 store i32 %conv, ptr @c, align 4, !dbg !35, !tbaa !36 24 call void @llvm.dbg.value(metadata i32 -1372423381, metadata !30, metadata !DIExpression()), !dbg !38 25 %call = call signext i8 @b(i32 6), !dbg !39 26 %conv1 = sext i8 %call to i32, !dbg !39 27 call void @llvm.dbg.value(metadata i32 %conv1, metadata !30, metadata !DIExpression()), !dbg !38 28 %1 = load i32, ptr @d, align 4, !dbg !40, !tbaa !36 29 %call2 = call i32 (...) @optimize_me_not(), !dbg !41 30 ret i32 0, !dbg !42 31} 32 33declare i32 @optimize_me_not(...) local_unnamed_addr #1 34declare void @llvm.dbg.value(metadata, metadata, metadata) #2 35 36!llvm.dbg.cu = !{!2} 37!llvm.module.flags = !{!13, !14, !15, !16} 38!llvm.ident = !{!17} 39 40!0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression()) 41!1 = distinct !DIGlobalVariable(name: "e", scope: !2, file: !3, line: 3, type: !12, isLocal: false, isDefinition: true) 42!2 = distinct !DICompileUnit(language: DW_LANG_C99, file: !3, producer: "clang version 9.0.0 (https://github.com/llvm/llvm-project b306ef12f046353ea5bda4b3b77759e57909a0db)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !4, globals: !5, nameTableKind: GNU) 43!3 = !DIFile(filename: "a.c", directory: "/Users/davide/llvm/build/bin") 44!4 = !{} 45!5 = !{!6, !10, !0} 46!6 = !DIGlobalVariableExpression(var: !7, expr: !DIExpression()) 47!7 = distinct !DIGlobalVariable(name: "c", scope: !2, file: !3, line: 2, type: !8, isLocal: false, isDefinition: true) 48!8 = !DIDerivedType(tag: DW_TAG_typedef, name: "a", file: !3, line: 1, baseType: !9) 49!9 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed) 50!10 = !DIGlobalVariableExpression(var: !11, expr: !DIExpression()) 51!11 = distinct !DIGlobalVariable(name: "d", scope: !2, file: !3, line: 2, type: !8, isLocal: false, isDefinition: true) 52!12 = !DIBasicType(name: "char", size: 8, encoding: DW_ATE_signed_char) 53!13 = !{i32 2, !"Dwarf Version", i32 4} 54!14 = !{i32 2, !"Debug Info Version", i32 3} 55!15 = !{i32 1, !"wchar_size", i32 4} 56!16 = !{i32 7, !"PIC Level", i32 2} 57!17 = !{!"clang version 9.0.0 (https://github.com/llvm/llvm-project b306ef12f046353ea5bda4b3b77759e57909a0db)"} 58!18 = distinct !DISubprogram(name: "b", scope: !3, file: !3, line: 4, type: !19, scopeLine: 4, flags: DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !2, retainedNodes: !21) 59!19 = !DISubroutineType(types: !20) 60!20 = !{!12, !9} 61!21 = !{!22} 62!22 = !DILocalVariable(name: "f", arg: 1, scope: !18, file: !3, line: 4, type: !9) 63!23 = !DILocation(line: 4, column: 9, scope: !18) 64!24 = !DILocation(line: 4, column: 21, scope: !18) 65!25 = !DILocation(line: 4, column: 14, scope: !18) 66!26 = distinct !DISubprogram(name: "main", scope: !3, file: !3, line: 5, type: !27, scopeLine: 5, flags: DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !2, retainedNodes: !29) 67!27 = !DISubroutineType(types: !28) 68!28 = !{!9} 69!29 = !{!30} 70!30 = !DILocalVariable(name: "l_1499", scope: !26, file: !3, line: 7, type: !8) 71!31 = !DILocation(line: 6, column: 7, scope: !26) 72!32 = !{!33, !33, i64 0} 73!33 = !{!"omnipotent char", !34, i64 0} 74!34 = !{!"Simple C/C++ TBAA"} 75!35 = !DILocation(line: 6, column: 5, scope: !26) 76!36 = !{!37, !37, i64 0} 77!37 = !{!"int", !33, i64 0} 78!38 = !DILocation(line: 7, column: 5, scope: !26) 79!39 = !DILocation(line: 8, column: 12, scope: !26) 80!40 = !DILocation(line: 9, column: 11, scope: !26) 81!41 = !DILocation(line: 10, column: 3, scope: !26) 82!42 = !DILocation(line: 11, column: 1, scope: !26) 83