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-rw-r--r--test/DebugInfo/Generic/incorrect-variable-debugloc.ll391
1 files changed, 391 insertions, 0 deletions
diff --git a/test/DebugInfo/Generic/incorrect-variable-debugloc.ll b/test/DebugInfo/Generic/incorrect-variable-debugloc.ll
new file mode 100644
index 000000000000..cf713ee3b970
--- /dev/null
+++ b/test/DebugInfo/Generic/incorrect-variable-debugloc.ll
@@ -0,0 +1,391 @@
+; REQUIRES: object-emission
+
+; RUN: %llc_dwarf -O2 -filetype=obj < %s | llvm-dwarfdump -debug-dump=info - | FileCheck %s
+
+; This is a test case that's as reduced as I can get it, though I haven't fully
+; understood the mechanisms by which this bug occurs, so perhaps there's further
+; simplification to be had (it's certainly a bit non-obvious what's going on). I
+; hesitate to hand-craft or otherwise simplify the IR compared to what Clang
+; generates as this is a particular tickling of optimizations and debug location
+; propagation I want a realistic example of.
+
+; Generated with clang-tot -cc1 -g -O2 -w -std=c++11 -fsanitize=address,use-after-return -fcxx-exceptions -fexceptions -x c++ incorrect-variable-debug-loc.cpp -emit-llvm
+
+; struct A {
+; int m_fn1();
+; };
+;
+; struct B {
+; void __attribute__((always_inline)) m_fn2() { i = 0; }
+; int i;
+; };
+;
+; struct C {
+; void m_fn3();
+; int j;
+; B b;
+; };
+;
+; int fn1() {
+; C A;
+; A.b.m_fn2();
+; A.m_fn3();
+; }
+; void C::m_fn3() {
+; A().m_fn1();
+; b.m_fn2();
+; }
+
+; CHECK: DW_TAG_structure_type
+; CHECK-NEXT: DW_AT_name {{.*}} "C"
+; CHECK: [[M_FN3_DECL:.*]]: DW_TAG_subprogram
+; CHECK-NOT: {{DW_TAG|NULL}}
+; CHECK: DW_AT_name {{.*}} "m_fn3"
+
+; CHECK: DW_AT_specification {{.*}} {[[M_FN3_DECL]]}
+; CHECK-NOT: DW_TAG
+; CHECK: DW_TAG_formal_parameter
+; CHECK-NOT: DW_TAG
+; CHECK: DW_AT_name {{.*}} "this"
+
+%struct.C = type { i32, %struct.B }
+%struct.B = type { i32 }
+%struct.A = type { i8 }
+
+@llvm.global_ctors = appending global [1 x { i32, void ()* }] [{ i32, void ()* } { i32 1, void ()* @asan.module_ctor }]
+@__asan_option_detect_stack_use_after_return = external global i32
+@__asan_gen_ = private unnamed_addr constant [11 x i8] c"1 32 8 1 A\00", align 1
+@__asan_gen_1 = private unnamed_addr constant [13 x i8] c"1 32 1 3 tmp\00", align 1
+
+; Function Attrs: noreturn sanitize_address
+define i32 @_Z3fn1v() #0 !dbg !22 {
+entry:
+ %MyAlloca = alloca [64 x i8], align 32, !dbg !39
+ %0 = ptrtoint [64 x i8]* %MyAlloca to i64, !dbg !39
+ %1 = load i32, i32* @__asan_option_detect_stack_use_after_return, !dbg !39
+ %2 = icmp ne i32 %1, 0, !dbg !39
+ br i1 %2, label %3, label %5
+
+; <label>:3 ; preds = %entry
+ %4 = call i64 @__asan_stack_malloc_0(i64 64, i64 %0), !dbg !39
+ br label %5
+
+; <label>:5 ; preds = %entry, %3
+ %6 = phi i64 [ %0, %entry ], [ %4, %3 ], !dbg !39
+ %7 = add i64 %6, 32, !dbg !39
+ %8 = inttoptr i64 %7 to %struct.C*, !dbg !39
+ %9 = inttoptr i64 %6 to i64*, !dbg !39
+ store i64 1102416563, i64* %9, !dbg !39
+ %10 = add i64 %6, 8, !dbg !39
+ %11 = inttoptr i64 %10 to i64*, !dbg !39
+ store i64 ptrtoint ([11 x i8]* @__asan_gen_ to i64), i64* %11, !dbg !39
+ %12 = add i64 %6, 16, !dbg !39
+ %13 = inttoptr i64 %12 to i64*, !dbg !39
+ store i64 ptrtoint (i32 ()* @_Z3fn1v to i64), i64* %13, !dbg !39
+ %14 = lshr i64 %6, 3, !dbg !39
+ %15 = add i64 %14, 2147450880, !dbg !39
+ %16 = add i64 %15, 0, !dbg !39
+ %17 = inttoptr i64 %16 to i64*, !dbg !39
+ store i64 -868083117767659023, i64* %17, !dbg !39
+ %i.i = getelementptr inbounds %struct.C, %struct.C* %8, i64 0, i32 1, i32 0, !dbg !39
+ %18 = ptrtoint i32* %i.i to i64, !dbg !39
+ %19 = lshr i64 %18, 3, !dbg !39
+ %20 = add i64 %19, 2147450880, !dbg !39
+ %21 = inttoptr i64 %20 to i8*, !dbg !39
+ %22 = load i8, i8* %21, !dbg !39
+ %23 = icmp ne i8 %22, 0, !dbg !39
+ br i1 %23, label %24, label %30, !dbg !39
+
+; <label>:24 ; preds = %5
+ %25 = and i64 %18, 7, !dbg !39
+ %26 = add i64 %25, 3, !dbg !39
+ %27 = trunc i64 %26 to i8, !dbg !39
+ %28 = icmp sge i8 %27, %22, !dbg !39
+ br i1 %28, label %29, label %30
+
+; <label>:29 ; preds = %24
+ call void @__asan_report_store4(i64 %18), !dbg !39
+ call void asm sideeffect "", ""()
+ unreachable
+
+; <label>:30 ; preds = %24, %5
+ store i32 0, i32* %i.i, align 4, !dbg !39, !tbaa !41
+ tail call void @llvm.dbg.value(metadata %struct.C* %8, i64 0, metadata !27, metadata !DIExpression()), !dbg !46
+ call void @_ZN1C5m_fn3Ev(%struct.C* %8), !dbg !47
+ unreachable, !dbg !47
+}
+
+; Function Attrs: sanitize_address
+define void @_ZN1C5m_fn3Ev(%struct.C* nocapture %this) #1 align 2 !dbg !28 {
+entry:
+ %MyAlloca = alloca [64 x i8], align 32, !dbg !48
+ %0 = ptrtoint [64 x i8]* %MyAlloca to i64, !dbg !48
+ %1 = load i32, i32* @__asan_option_detect_stack_use_after_return, !dbg !48
+ %2 = icmp ne i32 %1, 0, !dbg !48
+ br i1 %2, label %3, label %5
+
+; <label>:3 ; preds = %entry
+ %4 = call i64 @__asan_stack_malloc_0(i64 64, i64 %0), !dbg !48
+ br label %5
+
+; <label>:5 ; preds = %entry, %3
+ %6 = phi i64 [ %0, %entry ], [ %4, %3 ], !dbg !48
+ %7 = add i64 %6, 32, !dbg !48
+ %8 = inttoptr i64 %7 to %struct.A*, !dbg !48
+ %9 = inttoptr i64 %6 to i64*, !dbg !48
+ store i64 1102416563, i64* %9, !dbg !48
+ %10 = add i64 %6, 8, !dbg !48
+ %11 = inttoptr i64 %10 to i64*, !dbg !48
+ store i64 ptrtoint ([13 x i8]* @__asan_gen_1 to i64), i64* %11, !dbg !48
+ %12 = add i64 %6, 16, !dbg !48
+ %13 = inttoptr i64 %12 to i64*, !dbg !48
+ store i64 ptrtoint (void (%struct.C*)* @_ZN1C5m_fn3Ev to i64), i64* %13, !dbg !48
+ %14 = lshr i64 %6, 3, !dbg !48
+ %15 = add i64 %14, 2147450880, !dbg !48
+ %16 = add i64 %15, 0, !dbg !48
+ %17 = inttoptr i64 %16 to i64*, !dbg !48
+ store i64 -868083113472691727, i64* %17, !dbg !48
+ tail call void @llvm.dbg.value(metadata %struct.C* %this, i64 0, metadata !30, metadata !DIExpression()), !dbg !48
+ %call = call i32 @_ZN1A5m_fn1Ev(%struct.A* %8), !dbg !49
+ %i.i = getelementptr inbounds %struct.C, %struct.C* %this, i64 0, i32 1, i32 0, !dbg !50
+ %18 = ptrtoint i32* %i.i to i64, !dbg !50
+ %19 = lshr i64 %18, 3, !dbg !50
+ %20 = add i64 %19, 2147450880, !dbg !50
+ %21 = inttoptr i64 %20 to i8*, !dbg !50
+ %22 = load i8, i8* %21, !dbg !50
+ %23 = icmp ne i8 %22, 0, !dbg !50
+ br i1 %23, label %24, label %30, !dbg !50
+
+; <label>:24 ; preds = %5
+ %25 = and i64 %18, 7, !dbg !50
+ %26 = add i64 %25, 3, !dbg !50
+ %27 = trunc i64 %26 to i8, !dbg !50
+ %28 = icmp sge i8 %27, %22, !dbg !50
+ br i1 %28, label %29, label %30
+
+; <label>:29 ; preds = %24
+ call void @__asan_report_store4(i64 %18), !dbg !50
+ call void asm sideeffect "", ""()
+ unreachable
+
+; <label>:30 ; preds = %24, %5
+ store i32 0, i32* %i.i, align 4, !dbg !50, !tbaa !41
+ store i64 1172321806, i64* %9, !dbg !52
+ %31 = icmp ne i64 %6, %0, !dbg !52
+ br i1 %31, label %32, label %39, !dbg !52
+
+; <label>:32 ; preds = %30
+ %33 = add i64 %15, 0, !dbg !52
+ %34 = inttoptr i64 %33 to i64*, !dbg !52
+ store i64 -723401728380766731, i64* %34, !dbg !52
+ %35 = add i64 %6, 56, !dbg !52
+ %36 = inttoptr i64 %35 to i64*, !dbg !52
+ %37 = load i64, i64* %36, !dbg !52
+ %38 = inttoptr i64 %37 to i8*, !dbg !52
+ store i8 0, i8* %38, !dbg !52
+ br label %42, !dbg !52
+
+; <label>:39 ; preds = %30
+ %40 = add i64 %15, 0, !dbg !52
+ %41 = inttoptr i64 %40 to i64*, !dbg !52
+ store i64 0, i64* %41, !dbg !52
+ br label %42, !dbg !52
+
+; <label>:42 ; preds = %39, %32
+ ret void, !dbg !52
+}
+
+declare i32 @_ZN1A5m_fn1Ev(%struct.A*) #2
+
+; Function Attrs: nounwind readnone
+declare void @llvm.dbg.value(metadata, i64, metadata, metadata) #3
+
+define internal void @asan.module_ctor() {
+ tail call void @__asan_init_v3()
+ ret void
+}
+
+declare void @__asan_init_v3()
+
+declare void @__asan_report_load1(i64)
+
+declare void @__asan_load1(i64)
+
+declare void @__asan_report_load2(i64)
+
+declare void @__asan_load2(i64)
+
+declare void @__asan_report_load4(i64)
+
+declare void @__asan_load4(i64)
+
+declare void @__asan_report_load8(i64)
+
+declare void @__asan_load8(i64)
+
+declare void @__asan_report_load16(i64)
+
+declare void @__asan_load16(i64)
+
+declare void @__asan_report_store1(i64)
+
+declare void @__asan_store1(i64)
+
+declare void @__asan_report_store2(i64)
+
+declare void @__asan_store2(i64)
+
+declare void @__asan_report_store4(i64)
+
+declare void @__asan_store4(i64)
+
+declare void @__asan_report_store8(i64)
+
+declare void @__asan_store8(i64)
+
+declare void @__asan_report_store16(i64)
+
+declare void @__asan_store16(i64)
+
+declare void @__asan_report_load_n(i64, i64)
+
+declare void @__asan_report_store_n(i64, i64)
+
+declare void @__asan_loadN(i64, i64)
+
+declare void @__asan_storeN(i64, i64)
+
+declare i8* @__asan_memmove(i8*, i8*, i64)
+
+declare i8* @__asan_memcpy(i8*, i8*, i64)
+
+declare i8* @__asan_memset(i8*, i32, i64)
+
+declare void @__asan_handle_no_return()
+
+declare void @__sanitizer_cov()
+
+declare void @__sanitizer_ptr_cmp(i64, i64)
+
+declare void @__sanitizer_ptr_sub(i64, i64)
+
+declare i64 @__asan_stack_malloc_0(i64, i64)
+
+declare void @__asan_stack_free_0(i64, i64, i64)
+
+declare i64 @__asan_stack_malloc_1(i64, i64)
+
+declare void @__asan_stack_free_1(i64, i64, i64)
+
+declare i64 @__asan_stack_malloc_2(i64, i64)
+
+declare void @__asan_stack_free_2(i64, i64, i64)
+
+declare i64 @__asan_stack_malloc_3(i64, i64)
+
+declare void @__asan_stack_free_3(i64, i64, i64)
+
+declare i64 @__asan_stack_malloc_4(i64, i64)
+
+declare void @__asan_stack_free_4(i64, i64, i64)
+
+declare i64 @__asan_stack_malloc_5(i64, i64)
+
+declare void @__asan_stack_free_5(i64, i64, i64)
+
+declare i64 @__asan_stack_malloc_6(i64, i64)
+
+declare void @__asan_stack_free_6(i64, i64, i64)
+
+declare i64 @__asan_stack_malloc_7(i64, i64)
+
+declare void @__asan_stack_free_7(i64, i64, i64)
+
+declare i64 @__asan_stack_malloc_8(i64, i64)
+
+declare void @__asan_stack_free_8(i64, i64, i64)
+
+declare i64 @__asan_stack_malloc_9(i64, i64)
+
+declare void @__asan_stack_free_9(i64, i64, i64)
+
+declare i64 @__asan_stack_malloc_10(i64, i64)
+
+declare void @__asan_stack_free_10(i64, i64, i64)
+
+declare void @__asan_poison_stack_memory(i64, i64)
+
+declare void @__asan_unpoison_stack_memory(i64, i64)
+
+declare void @__asan_before_dynamic_init(i64)
+
+declare void @__asan_after_dynamic_init()
+
+declare void @__asan_register_globals(i64, i64)
+
+declare void @__asan_unregister_globals(i64, i64)
+
+declare void @__sanitizer_cov_module_init(i64)
+
+attributes #0 = { noreturn sanitize_address "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 = { sanitize_address "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 = { "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 #3 = { nounwind readnone }
+
+!llvm.dbg.cu = !{!0}
+!llvm.module.flags = !{!36, !37}
+!llvm.ident = !{!38}
+
+!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, producer: "clang version 3.5.0 ", isOptimized: true, emissionKind: 1, file: !1, enums: !2, retainedTypes: !3, subprograms: !21, globals: !2, imports: !2)
+!1 = !DIFile(filename: "<stdin>", directory: "/tmp/dbginfo")
+!2 = !{}
+!3 = !{!4, !14}
+!4 = !DICompositeType(tag: DW_TAG_structure_type, name: "C", line: 10, size: 64, align: 32, file: !5, elements: !6, identifier: "_ZTS1C")
+!5 = !DIFile(filename: "incorrect-variable-debug-loc.cpp", directory: "/tmp/dbginfo")
+!6 = !{!7, !9, !10}
+!7 = !DIDerivedType(tag: DW_TAG_member, name: "j", line: 12, 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 = !DIDerivedType(tag: DW_TAG_member, name: "b", line: 13, size: 32, align: 32, offset: 32, file: !5, scope: !"_ZTS1C", baseType: !"_ZTS1B")
+!10 = !DISubprogram(name: "m_fn3", linkageName: "_ZN1C5m_fn3Ev", line: 11, isLocal: false, isDefinition: false, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: true, scopeLine: 11, file: !5, scope: !"_ZTS1C", type: !11)
+!11 = !DISubroutineType(types: !12)
+!12 = !{null, !13}
+!13 = !DIDerivedType(tag: DW_TAG_pointer_type, size: 64, align: 64, flags: DIFlagArtificial | DIFlagObjectPointer, baseType: !"_ZTS1C")
+!14 = !DICompositeType(tag: DW_TAG_structure_type, name: "B", line: 5, size: 32, align: 32, file: !5, elements: !15, identifier: "_ZTS1B")
+!15 = !{!16, !17}
+!16 = !DIDerivedType(tag: DW_TAG_member, name: "i", line: 7, size: 32, align: 32, file: !5, scope: !"_ZTS1B", baseType: !8)
+!17 = !DISubprogram(name: "m_fn2", linkageName: "_ZN1B5m_fn2Ev", line: 6, isLocal: false, isDefinition: false, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: true, scopeLine: 6, file: !5, scope: !"_ZTS1B", type: !18)
+!18 = !DISubroutineType(types: !19)
+!19 = !{null, !20}
+!20 = !DIDerivedType(tag: DW_TAG_pointer_type, size: 64, align: 64, flags: DIFlagArtificial | DIFlagObjectPointer, baseType: !"_ZTS1B")
+!21 = !{!22, !28, !32}
+!22 = distinct !DISubprogram(name: "fn1", linkageName: "_Z3fn1v", line: 16, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: true, scopeLine: 16, file: !5, scope: !23, type: !24, variables: !26)
+!23 = !DIFile(filename: "incorrect-variable-debug-loc.cpp", directory: "/tmp/dbginfo")
+!24 = !DISubroutineType(types: !25)
+!25 = !{!8}
+!26 = !{!27}
+!27 = !DILocalVariable(name: "A", line: 17, scope: !22, file: !23, type: !"_ZTS1C")
+!28 = distinct !DISubprogram(name: "m_fn3", linkageName: "_ZN1C5m_fn3Ev", line: 21, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: true, scopeLine: 21, file: !5, scope: !"_ZTS1C", type: !11, declaration: !10, variables: !29)
+!29 = !{!30}
+!30 = !DILocalVariable(name: "this", arg: 1, flags: DIFlagArtificial | DIFlagObjectPointer, scope: !28, type: !31)
+!31 = !DIDerivedType(tag: DW_TAG_pointer_type, size: 64, align: 64, baseType: !"_ZTS1C")
+!32 = distinct !DISubprogram(name: "m_fn2", linkageName: "_ZN1B5m_fn2Ev", line: 6, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: true, scopeLine: 6, file: !5, scope: !"_ZTS1B", type: !18, declaration: !17, variables: !33)
+!33 = !{!34}
+!34 = !DILocalVariable(name: "this", arg: 1, flags: DIFlagArtificial | DIFlagObjectPointer, scope: !32, type: !35)
+!35 = !DIDerivedType(tag: DW_TAG_pointer_type, size: 64, align: 64, baseType: !"_ZTS1B")
+!36 = !{i32 2, !"Dwarf Version", i32 4}
+!37 = !{i32 2, !"Debug Info Version", i32 3}
+!38 = !{!"clang version 3.5.0 "}
+!39 = !DILocation(line: 6, scope: !32, inlinedAt: !40)
+!40 = !DILocation(line: 18, scope: !22)
+!41 = !{!42, !43, i64 0}
+!42 = !{!"_ZTS1B", !43, i64 0}
+!43 = !{!"int", !44, i64 0}
+!44 = !{!"omnipotent char", !45, i64 0}
+!45 = !{!"Simple C/C++ TBAA"}
+!46 = !DILocation(line: 17, scope: !22)
+!47 = !DILocation(line: 19, scope: !22)
+!48 = !DILocation(line: 0, scope: !28)
+!49 = !DILocation(line: 22, scope: !28)
+!50 = !DILocation(line: 6, scope: !32, inlinedAt: !51)
+!51 = !DILocation(line: 23, scope: !28)
+!52 = !DILocation(line: 24, scope: !28)
generated by cgit v1.2.3 (git 2.25.1) at 2025-10-10 02:28:40 +0000