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