derek.holloway
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53 lines
2.1 KiB
LLVM
53 lines
2.1 KiB
LLVM
; RUN: opt -run-twice -passes=verify -S -o - %s | FileCheck %s
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; If a module contains a DISubprogram referenced only indirectly from
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; instruction-level debug info metadata, but not attached to any Function
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; defined within the module, cloning such a module with CloneModule was
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; causing a DICompileUnit duplication: it would be moved in indirecty via a
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; DISubprogram by DebugInfoFinder (making sure DISubprogram's don't get
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; duplicated) first without being explicitly self-mapped within the ValueMap
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; shared among CloneFunctionInto calls, and then it would get copied during
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; named metadata cloning.
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;
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; This is to make sure we don't regress on that.
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; Derived from the following C-snippet
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;
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; static int eliminated(int j);
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; __attribute__((nodebug)) int nodebug(int k) { return eliminated(k); }
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; __attribute__((always_inline)) static int eliminated(int j) { return j * 2; }
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;
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; compiled with `clang -O1 -g1 -emit-llvm -S`
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; CHECK: DICompileUnit
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; CHECK-NOT: DICompileUnit
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source_filename = "clone-module.c"
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target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-apple-macosx"
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; Function Attrs: norecurse nounwind readnone ssp uwtable
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define i32 @nodebug(i32 %k) local_unnamed_addr #0 {
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entry:
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%mul.i = shl nsw i32 %k, 1, !dbg !8
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ret i32 %mul.i
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}
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attributes #0 = { norecurse nounwind readnone ssp uwtable }
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!3, !4, !5, !6}
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!llvm.ident = !{!7}
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!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 7.0.0", isOptimized: true, runtimeVersion: 0, emissionKind: LineTablesOnly, enums: !2)
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!1 = !DIFile(filename: "test.c", directory: "/Volumes/Data/llvm/build/obj")
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!2 = !{}
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!3 = !{i32 2, !"Dwarf Version", i32 4}
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!4 = !{i32 2, !"Debug Info Version", i32 3}
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!5 = !{i32 1, !"wchar_size", i32 4}
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!6 = !{i32 7, !"PIC Level", i32 2}
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!7 = !{!"clang version 7.0.0"}
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!8 = !DILocation(line: 3, column: 72, scope: !9)
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!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)
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!10 = !DISubroutineType(types: !2)
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