| ; RUN: %llc_dwarf -filetype=obj -O0 < %s | llvm-dwarfdump -debug-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]] |
| |
| source_filename = "test/DebugInfo/Generic/recursive_inlining.ll" |
| |
| %struct.C = type { i32 } |
| |
| @x = global %struct.C* null, align 8, !dbg !0 |
| |
| ; Function Attrs: nounwind |
| define void @_Z3fn6v() #0 !dbg !20 { |
| entry: |
| tail call void @_Z3fn8v() #3, !dbg !23 |
| %0 = load %struct.C*, %struct.C** @x, align 8, !dbg !24, !tbaa !25 |
| tail call void @llvm.dbg.value(metadata %struct.C* %0, metadata !29, metadata !32) #3, !dbg !33 |
| tail call void @_Z3fn8v() #3, !dbg !34 |
| %b.i = getelementptr inbounds %struct.C, %struct.C* %0, i64 0, i32 0, !dbg !35 |
| %1 = load i32, i32* %b.i, align 4, !dbg !35, !tbaa !37 |
| %tobool.i = icmp eq i32 %1, 0, !dbg !35 |
| br i1 %tobool.i, label %_ZN1C5m_fn2Ev.exit, label %if.then.i, !dbg !35 |
| |
| if.then.i: ; preds = %entry |
| tail call void @_Z3fn2iiii(i32 0, i32 0, i32 0, i32 0) #3, !dbg !40 |
| br label %_ZN1C5m_fn2Ev.exit, !dbg !40 |
| |
| _ZN1C5m_fn2Ev.exit: ; preds = %if.then.i, %entry |
| tail call void @_Z3fn3v() #3, !dbg !42 |
| ret void, !dbg !43 |
| } |
| |
| declare void @_Z3fn8v() #1 |
| |
| ; Function Attrs: nounwind |
| |
| define linkonce_odr void @_ZN1C5m_fn2Ev(%struct.C* nocapture readonly %this) #0 align 2 !dbg !30 { |
| entry: |
| tail call void @llvm.dbg.value(metadata %struct.C* %this, metadata !29, metadata !32), !dbg !44 |
| tail call void @_Z3fn8v() #3, !dbg !45 |
| %b = getelementptr inbounds %struct.C, %struct.C* %this, i64 0, i32 0, !dbg !46 |
| %0 = load i32, i32* %b, align 4, !dbg !46, !tbaa !37 |
| %tobool = icmp eq i32 %0, 0, !dbg !46 |
| br i1 %tobool, label %if.end, label %if.then, !dbg !46 |
| |
| if.then: ; preds = %entry |
| tail call void @_Z3fn2iiii(i32 0, i32 0, i32 0, i32 0) #3, !dbg !47 |
| br label %if.end, !dbg !47 |
| |
| if.end: ; preds = %if.then, %entry |
| tail call void @_Z3fn8v() #3, !dbg !48 |
| %1 = load %struct.C*, %struct.C** @x, align 8, !dbg !52, !tbaa !25 |
| tail call void @llvm.dbg.value(metadata %struct.C* %1, metadata !29, metadata !32) #3, !dbg !53 |
| tail call void @_Z3fn8v() #3, !dbg !54 |
| %b.i.i = getelementptr inbounds %struct.C, %struct.C* %1, i64 0, i32 0, !dbg !55 |
| %2 = load i32, i32* %b.i.i, align 4, !dbg !55, !tbaa !37 |
| %tobool.i.i = icmp eq i32 %2, 0, !dbg !55 |
| br i1 %tobool.i.i, label %_Z3fn6v.exit, label %if.then.i.i, !dbg !55 |
| |
| if.then.i.i: ; preds = %if.end |
| |
| tail call void @_Z3fn2iiii(i32 0, i32 0, i32 0, i32 0) #3, !dbg !56 |
| br label %_Z3fn6v.exit, !dbg !56 |
| |
| _Z3fn6v.exit: ; preds = %if.then.i.i, %if.end |
| tail call void @_Z3fn3v() #3, !dbg !57 |
| ret void, !dbg !58 |
| } |
| |
| ; Function Attrs: nounwind |
| define void @_Z3fn3v() #0 !dbg !50 { |
| entry: |
| br label %tailrecurse |
| |
| tailrecurse: ; preds = %tailrecurse.backedge, %entry |
| tail call void @_Z3fn8v() #3, !dbg !59 |
| %0 = load %struct.C*, %struct.C** @x, align 8, !dbg !61, !tbaa !25 |
| tail call void @llvm.dbg.value(metadata %struct.C* %0, metadata !29, metadata !32) #3, !dbg !62 |
| tail call void @_Z3fn8v() #3, !dbg !63 |
| %b.i.i = getelementptr inbounds %struct.C, %struct.C* %0, i64 0, i32 0, !dbg !64 |
| %1 = load i32, i32* %b.i.i, align 4, !dbg !64, !tbaa !37 |
| %tobool.i.i = icmp eq i32 %1, 0, !dbg !64 |
| br i1 %tobool.i.i, label %tailrecurse.backedge, label %if.then.i.i, !dbg !64 |
| |
| tailrecurse.backedge: ; preds = %if.then.i.i, %tailrecurse |
| br label %tailrecurse |
| |
| if.then.i.i: ; preds = %tailrecurse |
| tail call void @_Z3fn2iiii(i32 0, i32 0, i32 0, i32 0) #3, !dbg !65 |
| br label %tailrecurse.backedge, !dbg !65 |
| } |
| |
| ; Function Attrs: nounwind |
| define void @_Z3fn4v() #0 !dbg !66 { |
| entry: |
| %0 = load %struct.C*, %struct.C** @x, align 8, !dbg !67, !tbaa !25 |
| tail call void @_ZN1C5m_fn2Ev(%struct.C* %0), !dbg !67 |
| ret void, !dbg !67 |
| } |
| |
| ; Function Attrs: nounwind |
| define void @_Z3fn5v() #0 !dbg !68 { |
| entry: |
| %0 = load %struct.C*, %struct.C** @x, align 8, !dbg !69, !tbaa !25 |
| tail call void @_ZN1C5m_fn2Ev(%struct.C* %0), !dbg !69 |
| ret void, !dbg !69 |
| } |
| |
| declare void @_Z3fn2iiii(i32, i32, i32, i32) #1 |
| |
| ; Function Attrs: nounwind readnone |
| declare void @llvm.dbg.value(metadata, metadata, metadata) #2 |
| |
| attributes #0 = { nounwind "less-precise-fpmad"="false" "frame-pointer"="none" "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" "frame-pointer"="none" "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 = !{!12} |
| !llvm.module.flags = !{!17, !18} |
| !llvm.ident = !{!19} |
| |
| !0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression()) |
| !1 = !DIGlobalVariable(name: "x", scope: null, file: !2, line: 13, type: !3, isLocal: false, isDefinition: true) |
| !2 = !DIFile(filename: "recursive_inlining.cpp", directory: "/usr/local/google/home/blaikie/dev/scratch/missing_concrete_variable_on_darwin/reduce") |
| !3 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !4, size: 64, align: 64) |
| !4 = !DICompositeType(tag: DW_TAG_structure_type, name: "C", file: !2, line: 5, size: 32, align: 32, elements: !5, identifier: "_ZTS1C") |
| !5 = !{!6, !8} |
| !6 = !DIDerivedType(tag: DW_TAG_member, name: "b", scope: !4, file: !2, line: 6, baseType: !7, size: 32, align: 32) |
| !7 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed) |
| !8 = !DISubprogram(name: "m_fn2", linkageName: "_ZN1C5m_fn2Ev", scope: !4, file: !2, line: 7, type: !9, isLocal: false, isDefinition: false, scopeLine: 7, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: true) |
| !9 = !DISubroutineType(types: !10) |
| !10 = !{null, !11} |
| !11 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !4, size: 64, align: 64, flags: DIFlagArtificial | DIFlagObjectPointer) |
| !12 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !13, producer: "clang version 3.6.0 ", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !14, retainedTypes: !15, globals: !16, imports: !14) |
| !13 = !DIFile(filename: "<stdin>", directory: "/usr/local/google/home/blaikie/dev/scratch/missing_concrete_variable_on_darwin/reduce") |
| !14 = !{} |
| !15 = !{!4} |
| !16 = !{!0} |
| !17 = !{i32 2, !"Dwarf Version", i32 4} |
| !18 = !{i32 2, !"Debug Info Version", i32 3} |
| !19 = !{!"clang version 3.6.0 "} |
| !20 = distinct !DISubprogram(name: "fn6", linkageName: "_Z3fn6v", scope: !2, file: !2, line: 15, type: !21, isLocal: false, isDefinition: true, scopeLine: 15, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: true, unit: !12, retainedNodes: !14) |
| !21 = !DISubroutineType(types: !22) |
| !22 = !{null} |
| !23 = !DILocation(line: 16, scope: !20) |
| !24 = !DILocation(line: 17, scope: !20) |
| !25 = !{!26, !26, i64 0} |
| !26 = !{!"any pointer", !27, i64 0} |
| !27 = !{!"omnipotent char", !28, i64 0} |
| !28 = !{!"Simple C/C++ TBAA"} |
| !29 = !DILocalVariable(name: "this", arg: 1, scope: !30, type: !3, flags: DIFlagArtificial | DIFlagObjectPointer) |
| !30 = distinct !DISubprogram(name: "m_fn2", linkageName: "_ZN1C5m_fn2Ev", scope: !4, file: !2, line: 7, type: !9, isLocal: false, isDefinition: true, scopeLine: 7, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: true, unit: !12, declaration: !8, retainedNodes: !31) |
| !31 = !{!29} |
| !32 = !DIExpression() |
| !33 = !DILocation(line: 0, scope: !30, inlinedAt: !24) |
| !34 = !DILocation(line: 8, scope: !30, inlinedAt: !24) |
| !35 = !DILocation(line: 9, scope: !36, inlinedAt: !24) |
| !36 = distinct !DILexicalBlock(scope: !30, file: !2, line: 9) |
| !37 = !{!38, !39, i64 0} |
| !38 = !{!"struct", !39, i64 0} |
| !39 = !{!"int", !27, i64 0} |
| !40 = !DILocation(line: 9, scope: !41, inlinedAt: !24) |
| !41 = distinct !DILexicalBlock(scope: !36, file: !2, line: 9) |
| !42 = !DILocation(line: 10, scope: !30, inlinedAt: !24) |
| !43 = !DILocation(line: 19, scope: !20) |
| !44 = !DILocation(line: 0, scope: !30) |
| !45 = !DILocation(line: 8, scope: !30) |
| !46 = !DILocation(line: 9, scope: !36) |
| !47 = !DILocation(line: 9, scope: !41) |
| !48 = !DILocation(line: 16, scope: !20, inlinedAt: !49) |
| !49 = !DILocation(line: 20, scope: !50, inlinedAt: !51) |
| !50 = distinct !DISubprogram(name: "fn3", linkageName: "_Z3fn3v", scope: !2, file: !2, line: 20, type: !21, isLocal: false, isDefinition: true, scopeLine: 20, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: true, unit: !12, retainedNodes: !14) |
| !51 = !DILocation(line: 10, scope: !30) |
| !52 = !DILocation(line: 17, scope: !20, inlinedAt: !49) |
| !53 = !DILocation(line: 0, scope: !30, inlinedAt: !52) |
| !54 = !DILocation(line: 8, scope: !30, inlinedAt: !52) |
| !55 = !DILocation(line: 9, scope: !36, inlinedAt: !52) |
| !56 = !DILocation(line: 9, scope: !41, inlinedAt: !52) |
| !57 = !DILocation(line: 10, scope: !30, inlinedAt: !52) |
| !58 = !DILocation(line: 11, scope: !30) |
| !59 = !DILocation(line: 16, scope: !20, inlinedAt: !60) |
| !60 = !DILocation(line: 20, scope: !50) |
| !61 = !DILocation(line: 17, scope: !20, inlinedAt: !60) |
| !62 = !DILocation(line: 0, scope: !30, inlinedAt: !61) |
| !63 = !DILocation(line: 8, scope: !30, inlinedAt: !61) |
| !64 = !DILocation(line: 9, scope: !36, inlinedAt: !61) |
| !65 = !DILocation(line: 9, scope: !41, inlinedAt: !61) |
| !66 = distinct !DISubprogram(name: "fn4", linkageName: "_Z3fn4v", scope: !2, file: !2, line: 21, type: !21, isLocal: false, isDefinition: true, scopeLine: 21, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: true, unit: !12, retainedNodes: !14) |
| !67 = !DILocation(line: 21, scope: !66) |
| !68 = distinct !DISubprogram(name: "fn5", linkageName: "_Z3fn5v", scope: !2, file: !2, line: 22, type: !21, isLocal: false, isDefinition: true, scopeLine: 22, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: true, unit: !12, retainedNodes: !14) |
| !69 = !DILocation(line: 22, scope: !68) |
| |