1 files changed, 275 insertions, 0 deletions
diff --git a/test/DebugInfo/Generic/recursive_inlining.ll b/test/DebugInfo/Generic/recursive_inlining.ll
new file mode 100644
index 000000000000..02c147e7aa68
--- /dev/null
+++ b/test/DebugInfo/Generic/recursive_inlining.ll
@@ -0,0 +1,275 @@
+; REQUIRES: object-emission
+
+; RUN: %llc_dwarf -filetype=obj -O0 < %s | llvm-dwarfdump -debug-dump=info - | FileCheck %s
+
+; This isn't a very pretty test case - I imagine there might be other ways to
+; tickle the optimizers into producing the desired code, but I haven't found
+; them.
+
+; The issue is when a function is inlined into itself, the inlined argument
+; accidentally overwrote the concrete argument and was lost.
+
+; IR generated from the following source compiled with clang -g:
+; void fn1(void *);
+; void fn2(int, int, int, int);
+; void fn3();
+; void fn8();
+; struct C {
+;   int b;
+;   void m_fn2() {
+;     fn8();
+;     if (b) fn2(0, 0, 0, 0);
+;     fn3();
+;   }
+; };
+; C *x;
+; inline void fn7() {}
+; void fn6() {
+;   fn8();
+;   x->m_fn2();
+;   fn7();
+; }
+; void fn3() { fn6(); }
+; void fn4() { x->m_fn2(); }
+; void fn5() { x->m_fn2(); }
+
+; The definition of C and declaration of C::m_fn2
+; CHECK: DW_TAG_structure_type
+; CHECK-NOT: {{DW_TAG|NULL}}
+; CHECK: DW_TAG_member
+; CHECK-NOT: {{DW_TAG|NULL}}
+; CHECK: [[M_FN2_DECL:.*]]: DW_TAG_subprogram
+; CHECK-NOT: DW_TAG
+; CHECK:     DW_AT_name {{.*}} "m_fn2"
+; CHECK-NOT: {{DW_TAG|NULL}}
+; CHECK:     DW_TAG_formal_parameter
+
+; The abstract definition of C::m_fn2
+; CHECK: [[M_FN2_ABS_DEF:.*]]: DW_TAG_subprogram
+; CHECK-NOT: DW_TAG
+; CHECK:   DW_AT_specification {{.*}} {[[M_FN2_DECL]]}
+; CHECK-NOT: DW_TAG
+; CHECK:   DW_AT_inline
+; CHECK-NOT: {{DW_TAG|NULL}}
+; CHECK: [[M_FN2_THIS_ABS_DEF:.*]]:   DW_TAG_formal_parameter
+; CHECK-NOT: DW_TAG
+; CHECK:     DW_AT_name {{.*}} "this"
+
+; Skip some other functions
+; CHECK: DW_TAG_subprogram
+; CHECK: DW_TAG_subprogram
+; CHECK: DW_TAG_subprogram
+
+; The concrete definition of C::m_fn2
+; CHECK: DW_TAG_subprogram
+; CHECK-NOT: DW_TAG
+; CHECK:   DW_AT_abstract_origin {{.*}} {[[M_FN2_ABS_DEF]]}
+; CHECK-NOT: {{DW_TAG|NULL}}
+; CHECK:   DW_TAG_formal_parameter
+; CHECK-NOT: DW_TAG
+; CHECK:     DW_AT_abstract_origin {{.*}} {[[M_FN2_THIS_ABS_DEF]]}
+; CHECK-NOT: {{DW_TAG|NULL}}
+; Inlined fn3:
+; CHECK:     DW_TAG_inlined_subroutine
+; CHECK-NOT: {{DW_TAG|NULL}}
+; Inlined fn6:
+; CHECK:       DW_TAG_inlined_subroutine
+; CHECK-NOT: {{DW_TAG|NULL}}
+; Inlined C::m_fn2:
+; CHECK:         DW_TAG_inlined_subroutine
+; CHECK-NOT: DW_TAG
+; CHECK:           DW_AT_abstract_origin {{.*}} {[[M_FN2_ABS_DEF]]}
+; CHECK-NOT: {{DW_TAG|NULL}}
+; CHECK:           DW_TAG_formal_parameter
+; CHECK-NOT: DW_TAG
+; CHECK:              DW_AT_abstract_origin {{.*}} {[[M_FN2_THIS_ABS_DEF]]}
+
+
+
+%struct.C = type { i32 }
+
+@x = global %struct.C* null, align 8
+
+; Function Attrs: nounwind
+define void @_Z3fn6v() #0 !dbg !14 {
+entry:
+  tail call void @_Z3fn8v() #3, !dbg !31
+  %0 = load %struct.C*, %struct.C** @x, align 8, !dbg !32, !tbaa !33
+  tail call void @llvm.dbg.value(metadata %struct.C* %0, i64 0, metadata !37, metadata !DIExpression()) #3, !dbg !38
+  tail call void @_Z3fn8v() #3, !dbg !39
+  %b.i = getelementptr inbounds %struct.C, %struct.C* %0, i64 0, i32 0, !dbg !40
+  %1 = load i32, i32* %b.i, align 4, !dbg !40, !tbaa !42
+  %tobool.i = icmp eq i32 %1, 0, !dbg !40
+  br i1 %tobool.i, label %_ZN1C5m_fn2Ev.exit, label %if.then.i, !dbg !40
+
+if.then.i:                                        ; preds = %entry
+  tail call void @_Z3fn2iiii(i32 0, i32 0, i32 0, i32 0) #3, !dbg !45
+  br label %_ZN1C5m_fn2Ev.exit, !dbg !45
+
+_ZN1C5m_fn2Ev.exit:                               ; preds = %entry, %if.then.i
+  tail call void @_Z3fn3v() #3, !dbg !47
+  ret void, !dbg !48
+}
+
+declare void @_Z3fn8v() #1
+
+; Function Attrs: nounwind
+define linkonce_odr void @_ZN1C5m_fn2Ev(%struct.C* nocapture readonly %this) #0 align 2 !dbg !22 {
+entry:
+  tail call void @llvm.dbg.value(metadata %struct.C* %this, i64 0, metadata !24, metadata !DIExpression()), !dbg !49
+  tail call void @_Z3fn8v() #3, !dbg !50
+  %b = getelementptr inbounds %struct.C, %struct.C* %this, i64 0, i32 0, !dbg !51
+  %0 = load i32, i32* %b, align 4, !dbg !51, !tbaa !42
+  %tobool = icmp eq i32 %0, 0, !dbg !51
+  br i1 %tobool, label %if.end, label %if.then, !dbg !51
+
+if.then:                                          ; preds = %entry
+  tail call void @_Z3fn2iiii(i32 0, i32 0, i32 0, i32 0) #3, !dbg !52
+  br label %if.end, !dbg !52
+
+if.end:                                           ; preds = %entry, %if.then
+  tail call void @_Z3fn8v() #3, !dbg !53
+  %1 = load %struct.C*, %struct.C** @x, align 8, !dbg !56, !tbaa !33
+  tail call void @llvm.dbg.value(metadata %struct.C* %1, i64 0, metadata !57, metadata !DIExpression()) #3, !dbg !58
+  tail call void @_Z3fn8v() #3, !dbg !59
+  %b.i.i = getelementptr inbounds %struct.C, %struct.C* %1, i64 0, i32 0, !dbg !60
+  %2 = load i32, i32* %b.i.i, align 4, !dbg !60, !tbaa !42
+  %tobool.i.i = icmp eq i32 %2, 0, !dbg !60
+  br i1 %tobool.i.i, label %_Z3fn6v.exit, label %if.then.i.i, !dbg !60
+
+if.then.i.i:                                      ; preds = %if.end
+  tail call void @_Z3fn2iiii(i32 0, i32 0, i32 0, i32 0) #3, !dbg !61
+  br label %_Z3fn6v.exit, !dbg !61
+
+_Z3fn6v.exit:                                     ; preds = %if.end, %if.then.i.i
+  tail call void @_Z3fn3v() #3, !dbg !62
+  ret void, !dbg !63
+}
+
+; Function Attrs: nounwind
+define void @_Z3fn3v() #0 !dbg !18 {
+entry:
+  br label %tailrecurse
+
+tailrecurse:                                      ; preds = %tailrecurse.backedge, %entry
+  tail call void @_Z3fn8v() #3, !dbg !64
+  %0 = load %struct.C*, %struct.C** @x, align 8, !dbg !66, !tbaa !33
+  tail call void @llvm.dbg.value(metadata %struct.C* %0, i64 0, metadata !67, metadata !DIExpression()) #3, !dbg !68
+  tail call void @_Z3fn8v() #3, !dbg !69
+  %b.i.i = getelementptr inbounds %struct.C, %struct.C* %0, i64 0, i32 0, !dbg !70
+  %1 = load i32, i32* %b.i.i, align 4, !dbg !70, !tbaa !42
+  %tobool.i.i = icmp eq i32 %1, 0, !dbg !70
+  br i1 %tobool.i.i, label %tailrecurse.backedge, label %if.then.i.i, !dbg !70
+
+tailrecurse.backedge:                             ; preds = %tailrecurse, %if.then.i.i
+  br label %tailrecurse
+
+if.then.i.i:                                      ; preds = %tailrecurse
+  tail call void @_Z3fn2iiii(i32 0, i32 0, i32 0, i32 0) #3, !dbg !71
+  br label %tailrecurse.backedge, !dbg !71
+}
+
+; Function Attrs: nounwind
+define void @_Z3fn4v() #0 !dbg !19 {
+entry:
+  %0 = load %struct.C*, %struct.C** @x, align 8, !dbg !72, !tbaa !33
+  tail call void @_ZN1C5m_fn2Ev(%struct.C* %0), !dbg !72
+  ret void, !dbg !72
+}
+
+; Function Attrs: nounwind
+define void @_Z3fn5v() #0 !dbg !20 {
+entry:
+  %0 = load %struct.C*, %struct.C** @x, align 8, !dbg !73, !tbaa !33
+  tail call void @_ZN1C5m_fn2Ev(%struct.C* %0), !dbg !73
+  ret void, !dbg !73
+}
+
+declare void @_Z3fn2iiii(i32, i32, i32, i32) #1
+
+; Function Attrs: nounwind readnone
+declare void @llvm.dbg.value(metadata, i64, metadata, metadata) #2
+
+attributes #0 = { nounwind "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "no-realign-stack" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
+attributes #1 = { "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "no-realign-stack" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
+attributes #2 = { nounwind readnone }
+attributes #3 = { nounwind }
+
+!llvm.dbg.cu = !{!0}
+!llvm.module.flags = !{!28, !29}
+!llvm.ident = !{!30}
+
+!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, producer: "clang version 3.6.0 ", isOptimized: true, emissionKind: 1, file: !1, enums: !2, retainedTypes: !3, subprograms: !13, globals: !26, imports: !2)
+!1 = !DIFile(filename: "<stdin>", directory: "/usr/local/google/home/blaikie/dev/scratch/missing_concrete_variable_on_darwin/reduce")
+!2 = !{}
+!3 = !{!4}
+!4 = !DICompositeType(tag: DW_TAG_structure_type, name: "C", line: 5, size: 32, align: 32, file: !5, elements: !6, identifier: "_ZTS1C")
+!5 = !DIFile(filename: "recursive_inlining.cpp", directory: "/usr/local/google/home/blaikie/dev/scratch/missing_concrete_variable_on_darwin/reduce")
+!6 = !{!7, !9}
+!7 = !DIDerivedType(tag: DW_TAG_member, name: "b", line: 6, size: 32, align: 32, file: !5, scope: !"_ZTS1C", baseType: !8)
+!8 = !DIBasicType(tag: DW_TAG_base_type, name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
+!9 = !DISubprogram(name: "m_fn2", linkageName: "_ZN1C5m_fn2Ev", line: 7, isLocal: false, isDefinition: false, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: true, scopeLine: 7, file: !5, scope: !"_ZTS1C", type: !10)
+!10 = !DISubroutineType(types: !11)
+!11 = !{null, !12}
+!12 = !DIDerivedType(tag: DW_TAG_pointer_type, size: 64, align: 64, flags: DIFlagArtificial | DIFlagObjectPointer, baseType: !"_ZTS1C")
+!13 = !{!14, !18, !19, !20, !21, !22}
+!14 = distinct !DISubprogram(name: "fn6", linkageName: "_Z3fn6v", line: 15, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: true, scopeLine: 15, file: !5, scope: !15, type: !16, variables: !2)
+!15 = !DIFile(filename: "recursive_inlining.cpp", directory: "/usr/local/google/home/blaikie/dev/scratch/missing_concrete_variable_on_darwin/reduce")
+!16 = !DISubroutineType(types: !17)
+!17 = !{null}
+!18 = distinct !DISubprogram(name: "fn3", linkageName: "_Z3fn3v", line: 20, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: true, scopeLine: 20, file: !5, scope: !15, type: !16, variables: !2)
+!19 = distinct !DISubprogram(name: "fn4", linkageName: "_Z3fn4v", line: 21, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: true, scopeLine: 21, file: !5, scope: !15, type: !16, variables: !2)
+!20 = distinct !DISubprogram(name: "fn5", linkageName: "_Z3fn5v", line: 22, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: true, scopeLine: 22, file: !5, scope: !15, type: !16, variables: !2)
+!21 = distinct !DISubprogram(name: "fn7", linkageName: "_Z3fn7v", line: 14, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: true, scopeLine: 14, file: !5, scope: !15, type: !16, variables: !2)
+!22 = distinct !DISubprogram(name: "m_fn2", linkageName: "_ZN1C5m_fn2Ev", line: 7, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: true, scopeLine: 7, file: !5, scope: !"_ZTS1C", type: !10, declaration: !9, variables: !23)
+!23 = !{!24}
+!24 = !DILocalVariable(name: "this", arg: 1, flags: DIFlagArtificial | DIFlagObjectPointer, scope: !22, type: !25)
+!25 = !DIDerivedType(tag: DW_TAG_pointer_type, size: 64, align: 64, baseType: !"_ZTS1C")
+!26 = !{!27}
+!27 = !DIGlobalVariable(name: "x", line: 13, isLocal: false, isDefinition: true, scope: null, file: !15, type: !25, variable: %struct.C** @x)
+!28 = !{i32 2, !"Dwarf Version", i32 4}
+!29 = !{i32 2, !"Debug Info Version", i32 3}
+!30 = !{!"clang version 3.6.0 "}
+!31 = !DILocation(line: 16, scope: !14)
+!32 = !DILocation(line: 17, scope: !14)
+!33 = !{!34, !34, i64 0}
+!34 = !{!"any pointer", !35, i64 0}
+!35 = !{!"omnipotent char", !36, i64 0}
+!36 = !{!"Simple C/C++ TBAA"}
+!37 = !DILocalVariable(name: "this", arg: 1, flags: DIFlagArtificial | DIFlagObjectPointer, scope: !22, type: !25)
+!38 = !DILocation(line: 0, scope: !22, inlinedAt: !32)
+!39 = !DILocation(line: 8, scope: !22, inlinedAt: !32)
+!40 = !DILocation(line: 9, scope: !41, inlinedAt: !32)
+!41 = distinct !DILexicalBlock(line: 9, column: 0, file: !5, scope: !22)
+!42 = !{!43, !44, i64 0}
+!43 = !{!"_ZTS1C", !44, i64 0}
+!44 = !{!"int", !35, i64 0}
+!45 = !DILocation(line: 9, scope: !46, inlinedAt: !32)
+!46 = distinct !DILexicalBlock(line: 9, column: 0, file: !5, scope: !41)
+!47 = !DILocation(line: 10, scope: !22, inlinedAt: !32)
+!48 = !DILocation(line: 19, scope: !14)
+!49 = !DILocation(line: 0, scope: !22)
+!50 = !DILocation(line: 8, scope: !22)
+!51 = !DILocation(line: 9, scope: !41)
+!52 = !DILocation(line: 9, scope: !46)
+!53 = !DILocation(line: 16, scope: !14, inlinedAt: !54)
+!54 = !DILocation(line: 20, scope: !18, inlinedAt: !55)
+!55 = !DILocation(line: 10, scope: !22)
+!56 = !DILocation(line: 17, scope: !14, inlinedAt: !54)
+!57 = !DILocalVariable(name: "this", arg: 1, flags: DIFlagArtificial | DIFlagObjectPointer, scope: !22, type: !25)
+!58 = !DILocation(line: 0, scope: !22, inlinedAt: !56)
+!59 = !DILocation(line: 8, scope: !22, inlinedAt: !56)
+!60 = !DILocation(line: 9, scope: !41, inlinedAt: !56)
+!61 = !DILocation(line: 9, scope: !46, inlinedAt: !56)
+!62 = !DILocation(line: 10, scope: !22, inlinedAt: !56)
+!63 = !DILocation(line: 11, scope: !22)
+!64 = !DILocation(line: 16, scope: !14, inlinedAt: !65)
+!65 = !DILocation(line: 20, scope: !18)
+!66 = !DILocation(line: 17, scope: !14, inlinedAt: !65)
+!67 = !DILocalVariable(name: "this", arg: 1, flags: DIFlagArtificial | DIFlagObjectPointer, scope: !22, type: !25)
+!68 = !DILocation(line: 0, scope: !22, inlinedAt: !66)
+!69 = !DILocation(line: 8, scope: !22, inlinedAt: !66)
+!70 = !DILocation(line: 9, scope: !41, inlinedAt: !66)
+!71 = !DILocation(line: 9, scope: !46, inlinedAt: !66)
+!72 = !DILocation(line: 21, scope: !19)
+!73 = !DILocation(line: 22, scope: !20)