81 lines
3.3 KiB
LLVM
81 lines
3.3 KiB
LLVM
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; RUN: opt -run-twice -verify -S -o - %s | FileCheck %s
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; The ValueMap shared between CloneFunctionInto calls within CloneModule needs
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; to contain identity mappings for all of the DISubprogram's to prevent them
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; from being duplicated by MapMetadata / RemapInstruction calls, this is
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; achieved via DebugInfoFinder collecting all the DISubprogram's. However,
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; CloneFunctionInto was missing calls into DebugInfoFinder for functions w/o
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; DISubprogram's attached, but still referring DISubprogram's from within.
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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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; int inlined(int j);
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; __attribute__((nodebug)) int nodebug(int k) { return inlined(k); }
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; __attribute__((always_inline)) int inlined(int j) { return j * 2; }
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;
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; compiled with `clang -O1 -g3 -emit-llvm -S` by removing
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;
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; call void @llvm.dbg.value(metadata i32 %k, metadata !8, metadata !DIExpression()), !dbg !14
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;
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; line from @nodebug function.
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; The @llvm.dbg.value call is manually removed from @nodebug as not having
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; it there also may cause an incorrect remapping of the call in a case of a
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; regression, not just a duplication of a DISubprogram. Namely, the call's
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; metadata !8 2nd argument and the !dbg !14 debug location may get remapped
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; to reference different copies of the DISubprogram, which is verified by IR
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; Verifier, while having DISubprogram duplicates is not.
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; CHECK: DISubprogram
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; CHECK-NOT: DISubprogram
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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: 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 !15
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ret i32 %mul.i
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}
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; Function Attrs: alwaysinline nounwind readnone ssp uwtable
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define i32 @inlined(i32 %j) local_unnamed_addr #1 !dbg !9 {
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entry:
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call void @llvm.dbg.value(metadata i32 %j, metadata !8, metadata !DIExpression()), !dbg !14
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%mul = shl nsw i32 %j, 1, !dbg !15
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ret i32 %mul, !dbg !16
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}
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; Function Attrs: nounwind readnone speculatable
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declare void @llvm.dbg.value(metadata, metadata, metadata) #2
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attributes #0 = { nounwind readnone ssp uwtable }
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attributes #1 = { alwaysinline nounwind readnone ssp uwtable }
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attributes #2 = { nounwind readnone speculatable }
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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: FullDebug, enums: !2)
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!1 = !DIFile(filename: "clone-module.c", directory: "/somewhere")
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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 = !DILocalVariable(name: "j", arg: 1, scope: !9, file: !1, line: 3, type: !12)
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!9 = distinct !DISubprogram(name: "inlined", scope: !1, file: !1, line: 3, type: !10, isLocal: false, isDefinition: true, scopeLine: 3, flags: DIFlagPrototyped, isOptimized: true, unit: !0, retainedNodes: !13)
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!10 = !DISubroutineType(types: !11)
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!11 = !{!12, !12}
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!12 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
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!13 = !{!8}
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!14 = !DILocation(line: 3, column: 48, scope: !9)
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!15 = !DILocation(line: 3, column: 62, scope: !9)
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!16 = !DILocation(line: 3, column: 53, scope: !9)
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