1 ; RUN: opt -run-twice -verify -S -o - %s | FileCheck %s
3 ; The ValueMap shared between CloneFunctionInto calls within CloneModule needs
4 ; to contain identity mappings for all of the DISubprogram's to prevent them
5 ; from being duplicated by MapMetadata / RemapInstruction calls, this is
6 ; achieved via DebugInfoFinder collecting all the DISubprogram's. However,
7 ; CloneFunctionInto was missing calls into DebugInfoFinder for functions w/o
8 ; DISubprogram's attached, but still referring DISubprogram's from within.
10 ; This is to make sure we don't regress on that.
12 ; Derived from the following C-snippet
15 ; __attribute__((nodebug)) int nodebug(int k) { return inlined(k); }
16 ; __attribute__((always_inline)) int inlined(int j) { return j * 2; }
18 ; compiled with `clang -O1 -g3 -emit-llvm -S` by removing
20 ; call void @llvm.dbg.value(metadata i32 %k, metadata !8, metadata !DIExpression()), !dbg !14
22 ; line from @nodebug function.
24 ; The @llvm.dbg.value call is manually removed from @nodebug as not having
25 ; it there also may cause an incorrect remapping of the call in a case of a
26 ; regression, not just a duplication of a DISubprogram. Namely, the call's
27 ; metadata !8 2nd argument and the !dbg !14 debug location may get remapped
28 ; to reference different copies of the DISubprogram, which is verified by IR
29 ; Verifier, while having DISubprogram duplicates is not.
32 ; CHECK-NOT: DISubprogram
34 source_filename = "clone-module.c"
35 target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
36 target triple = "x86_64-apple-macosx"
38 ; Function Attrs: nounwind readnone ssp uwtable
39 define i32 @nodebug(i32 %k) local_unnamed_addr #0 {
41 %mul.i = shl nsw i32 %k, 1, !dbg !15
45 ; Function Attrs: alwaysinline nounwind readnone ssp uwtable
46 define i32 @inlined(i32 %j) local_unnamed_addr #1 !dbg !9 {
48 call void @llvm.dbg.value(metadata i32 %j, metadata !8, metadata !DIExpression()), !dbg !14
49 %mul = shl nsw i32 %j, 1, !dbg !15
50 ret i32 %mul, !dbg !16
53 ; Function Attrs: nounwind readnone speculatable
54 declare void @llvm.dbg.value(metadata, metadata, metadata) #2
56 attributes #0 = { nounwind readnone ssp uwtable }
57 attributes #1 = { alwaysinline nounwind readnone ssp uwtable }
58 attributes #2 = { nounwind readnone speculatable }
61 !llvm.module.flags = !{!3, !4, !5, !6}
64 !0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 7.0.0", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2)
65 !1 = !DIFile(filename: "clone-module.c", directory: "/somewhere")
67 !3 = !{i32 2, !"Dwarf Version", i32 4}
68 !4 = !{i32 2, !"Debug Info Version", i32 3}
69 !5 = !{i32 1, !"wchar_size", i32 4}
70 !6 = !{i32 7, !"PIC Level", i32 2}
71 !7 = !{!"clang version 7.0.0"}
72 !8 = !DILocalVariable(name: "j", arg: 1, scope: !9, file: !1, line: 3, type: !12)
73 !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)
74 !10 = !DISubroutineType(types: !11)
76 !12 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
78 !14 = !DILocation(line: 3, column: 48, scope: !9)
79 !15 = !DILocation(line: 3, column: 62, scope: !9)
80 !16 = !DILocation(line: 3, column: 53, scope: !9)