1; RUN: llc -filetype=obj -O0 < %s 2; Test that we handle DBG_VALUEs in a register without crashing. 3; 4; Generated from clang with -fsanitize=address: 5; struct A { 6; A(); 7; A(const A&); 8; }; 9; 10; A func(int) { 11; A a; 12; return a; 13; } 14 15target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128" 16target triple = "x86_64-unknown-linux-gnu" 17 18%struct.A = type { i8 } 19 20@__asan_mapping_offset = linkonce_odr constant i64 2147450880 21@__asan_mapping_scale = linkonce_odr constant i64 3 22@llvm.global_ctors = appending global [1 x { i32, void ()* }] [{ i32, void ()* } { i32 1, void ()* @asan.module_ctor }] 23@__asan_gen_ = private unnamed_addr constant [16 x i8] c"1 32 4 5 .addr \00", align 1 24 25; Function Attrs: sanitize_address uwtable 26define void @_Z4funci(%struct.A* noalias sret %agg.result, i32) #0 "stack-protector-buffer-size"="1" !dbg !4 { 27entry: 28 %MyAlloca = alloca [96 x i8], align 32 29 %1 = ptrtoint [96 x i8]* %MyAlloca to i64 30 %2 = add i64 %1, 32 31 %3 = inttoptr i64 %2 to i32* 32 %4 = inttoptr i64 %1 to i64* 33 store i64 1102416563, i64* %4 34 %5 = add i64 %1, 8 35 %6 = inttoptr i64 %5 to i64* 36 store i64 ptrtoint ([16 x i8]* @__asan_gen_ to i64), i64* %6 37 %7 = add i64 %1, 16 38 %8 = inttoptr i64 %7 to i64* 39 store i64 ptrtoint (void (%struct.A*, i32)* @_Z4funci to i64), i64* %8 40 %9 = lshr i64 %1, 3 41 %10 = add i64 %9, 2147450880 42 %11 = inttoptr i64 %10 to i32* 43 store i32 -235802127, i32* %11 44 %12 = add i64 %10, 4 45 %13 = inttoptr i64 %12 to i32* 46 store i32 -185273340, i32* %13 47 %14 = add i64 %10, 8 48 %15 = inttoptr i64 %14 to i32* 49 store i32 -202116109, i32* %15 50 %16 = ptrtoint i32* %3 to i64 51 %17 = lshr i64 %16, 3 52 %18 = add i64 %17, 2147450880 53 %19 = inttoptr i64 %18 to i8* 54 %20 = load i8, i8* %19 55 %21 = icmp ne i8 %20, 0 56 call void @llvm.dbg.declare(metadata i32* %3, metadata !23, metadata !28), !dbg !DILocation(scope: !4) 57 br i1 %21, label %22, label %28 58 59; <label>:22 ; preds = %entry 60 %23 = and i64 %16, 7 61 %24 = add i64 %23, 3 62 %25 = trunc i64 %24 to i8 63 %26 = icmp sge i8 %25, %20 64 br i1 %26, label %27, label %28 65 66; <label>:27 ; preds = %22 67 call void @__asan_report_store4(i64 %16) 68 call void asm sideeffect "", ""() 69 unreachable 70 71; <label>:28 ; preds = %22, %entry 72 store i32 %0, i32* %3, align 4 73 call void @llvm.dbg.declare(metadata %struct.A* %agg.result, metadata !24, metadata !DIExpression(DW_OP_deref)), !dbg !25 74 call void @_ZN1AC1Ev(%struct.A* %agg.result), !dbg !25 75 store i64 1172321806, i64* %4, !dbg !26 76 %29 = inttoptr i64 %10 to i32*, !dbg !26 77 store i32 0, i32* %29, !dbg !26 78 %30 = add i64 %10, 4, !dbg !26 79 %31 = inttoptr i64 %30 to i32*, !dbg !26 80 store i32 0, i32* %31, !dbg !26 81 %32 = add i64 %10, 8, !dbg !26 82 %33 = inttoptr i64 %32 to i32*, !dbg !26 83 store i32 0, i32* %33, !dbg !26 84 ret void, !dbg !26 85} 86 87; Function Attrs: nounwind readnone 88declare void @llvm.dbg.declare(metadata, metadata, metadata) #1 89 90declare void @_ZN1AC1Ev(%struct.A*) #2 91 92define internal void @asan.module_ctor() "stack-protector-buffer-size"="1" { 93 call void @__asan_init_v3() 94 %1 = load volatile i64, i64* @__asan_mapping_offset 95 %2 = load volatile i64, i64* @__asan_mapping_scale 96 ret void 97} 98 99declare void @__asan_init_v3() 100 101declare void @__asan_report_load1(i64) 102 103declare void @__asan_report_load2(i64) 104 105declare void @__asan_report_load4(i64) 106 107declare void @__asan_report_load8(i64) 108 109declare void @__asan_report_load16(i64) 110 111declare void @__asan_report_store1(i64) 112 113declare void @__asan_report_store2(i64) 114 115declare void @__asan_report_store4(i64) 116 117declare void @__asan_report_store8(i64) 118 119declare void @__asan_report_store16(i64) 120 121declare void @__asan_report_load_n(i64, i64) 122 123declare void @__asan_report_store_n(i64, i64) 124 125declare void @__asan_handle_no_return() 126 127declare i64 @__asan_stack_malloc(i64, i64) 128 129declare void @__asan_stack_free(i64, i64, i64) 130 131declare void @__asan_poison_stack_memory(i64, i64) 132 133declare void @__asan_unpoison_stack_memory(i64, i64) 134 135declare void @__asan_before_dynamic_init(i64) 136 137declare void @__asan_after_dynamic_init() 138 139declare void @__asan_register_globals(i64, i64) 140 141declare void @__asan_unregister_globals(i64, i64) 142 143attributes #0 = { sanitize_address uwtable "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf"="true" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "ssp-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" } 144attributes #1 = { nounwind readnone } 145attributes #2 = { "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf"="true" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "ssp-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" } 146 147!llvm.dbg.cu = !{!0} 148!llvm.module.flags = !{!22, !27} 149 150!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, producer: "clang version 3.4 ", isOptimized: false, emissionKind: 1, file: !1, enums: !2, retainedTypes: !2, subprograms: !3, globals: !2, imports: !2) 151!1 = !DIFile(filename: "crash.cpp", directory: "/tmp") 152!2 = !{} 153!3 = !{!4} 154!4 = distinct !DISubprogram(name: "func", linkageName: "_Z4funci", line: 6, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, scopeLine: 6, file: !1, scope: !5, type: !6, variables: !2) 155!5 = !DIFile(filename: "crash.cpp", directory: "/tmp") 156!6 = !DISubroutineType(types: !7) 157!7 = !{!8, !21} 158!8 = !DICompositeType(tag: DW_TAG_structure_type, name: "A", line: 1, size: 8, align: 8, file: !1, elements: !9) 159!9 = !{!10, !15} 160!10 = !DISubprogram(name: "A", line: 2, isLocal: false, isDefinition: false, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, scopeLine: 2, file: !1, scope: !8, type: !11) 161!11 = !DISubroutineType(types: !12) 162!12 = !{null, !13} 163!13 = !DIDerivedType(tag: DW_TAG_pointer_type, size: 64, align: 64, flags: DIFlagArtificial | DIFlagObjectPointer, baseType: !8) 164!15 = !DISubprogram(name: "A", line: 3, isLocal: false, isDefinition: false, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, scopeLine: 3, file: !1, scope: !8, type: !16) 165!16 = !DISubroutineType(types: !17) 166!17 = !{null, !13, !18} 167!18 = !DIDerivedType(tag: DW_TAG_reference_type, baseType: !19) 168!19 = !DIDerivedType(tag: DW_TAG_const_type, baseType: !8) 169!21 = !DIBasicType(tag: DW_TAG_base_type, name: "int", size: 32, align: 32, encoding: DW_ATE_signed) 170!22 = !{i32 2, !"Dwarf Version", i32 3} 171!23 = !DILocalVariable(name: "", line: 6, arg: 1, scope: !4, file: !5, type: !21) 172!24 = !DILocalVariable(name: "a", line: 7, scope: !4, file: !5, type: !8) 173!25 = !DILocation(line: 7, scope: !4) 174!26 = !DILocation(line: 8, scope: !4) 175!27 = !{i32 1, !"Debug Info Version", i32 3} 176!28 = !DIExpression(DW_OP_deref) 177