1; RUN: opt -run-twice -passes=verify -S -o - %s | FileCheck %s 2 3; If a module contains a DISubprogram referenced only indirectly from 4; instruction-level debug info metadata, but not attached to any Function 5; defined within the module, cloning such a module with CloneModule was 6; causing a DICompileUnit duplication: it would be moved in indirecty via a 7; DISubprogram by DebugInfoFinder (making sure DISubprogram's don't get 8; duplicated) first without being explicitly self-mapped within the ValueMap 9; shared among CloneFunctionInto calls, and then it would get copied during 10; named metadata cloning. 11; 12; This is to make sure we don't regress on that. 13 14; Derived from the following C-snippet 15; 16; static int eliminated(int j); 17; __attribute__((nodebug)) int nodebug(int k) { return eliminated(k); } 18; __attribute__((always_inline)) static int eliminated(int j) { return j * 2; } 19; 20; compiled with `clang -O1 -g1 -emit-llvm -S` 21 22; CHECK: DICompileUnit 23; CHECK-NOT: DICompileUnit 24 25source_filename = "clone-module.c" 26target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128" 27target triple = "x86_64-apple-macosx" 28 29; Function Attrs: norecurse nounwind readnone ssp uwtable 30define i32 @nodebug(i32 %k) local_unnamed_addr #0 { 31entry: 32 %mul.i = shl nsw i32 %k, 1, !dbg !8 33 ret i32 %mul.i 34} 35 36attributes #0 = { norecurse nounwind readnone ssp uwtable } 37 38!llvm.dbg.cu = !{!0} 39!llvm.module.flags = !{!3, !4, !5, !6} 40!llvm.ident = !{!7} 41 42!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 7.0.0", isOptimized: true, runtimeVersion: 0, emissionKind: LineTablesOnly, enums: !2) 43!1 = !DIFile(filename: "test.c", directory: "/Volumes/Data/llvm/build/obj") 44!2 = !{} 45!3 = !{i32 2, !"Dwarf Version", i32 4} 46!4 = !{i32 2, !"Debug Info Version", i32 3} 47!5 = !{i32 1, !"wchar_size", i32 4} 48!6 = !{i32 7, !"PIC Level", i32 2} 49!7 = !{!"clang version 7.0.0"} 50!8 = !DILocation(line: 3, column: 72, scope: !9) 51!9 = distinct !DISubprogram(name: "eliminated", scope: !1, file: !1, line: 3, type: !10, isLocal: true, isDefinition: true, scopeLine: 3, flags: DIFlagPrototyped, isOptimized: true, unit: !0, retainedNodes: !2) 52!10 = !DISubroutineType(types: !2) 53