1 ; RUN: llc -O0 -mtriple=x86_64-unknown-linux-gnu < %s | FileCheck %s
3 ; Verify that we have correct debug info for local variables in code
4 ; instrumented with AddressSanitizer.
6 ; Generated from the source file test.cc:
10 ; with "clang++ -S -emit-llvm -fsanitize=address -O0 -g test.cc"
12 ; First, argument variable "y" resides in %rdi:
13 ; CHECK: DEBUG_VALUE: bar:y <- RDI
15 ; Then its address is stored in a location on a stack:
16 ; CHECK: movq %rdi, [[OFFSET:[0-9]+]](%rsp)
17 ; CHECK-NEXT: [[START_LABEL:.Ltmp[0-9]+]]
18 ; CHECK-NEXT: DEBUG_VALUE: bar:y <- [RSP+[[OFFSET]]]
19 ; This location should be valid until the end of the function.
21 ; CHECK: .Ldebug_loc{{[0-9]+}}:
22 ; We expect two location ranges for the variable.
24 ; First, its address is stored in %rdi:
25 ; CHECK: .quad .Lfunc_begin0-.Lfunc_begin0
26 ; CHECK-NEXT: .quad [[START_LABEL]]-.Lfunc_begin0
29 ; Then it's addressed via %rsp:
30 ; CHECK: .quad [[START_LABEL]]-.Lfunc_begin0
31 ; CHECK-NEXT: .Lfunc_end0-.Lfunc_begin0
33 ; CHECK-NEXT: [[OFFSET]]
36 ; ModuleID = 'test.cc'
37 target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
38 target triple = "x86_64-unknown-linux-gnu"
40 @llvm.global_ctors = appending global [1 x { i32, void ()* }] [{ i32, void ()* } { i32 1, void ()* @asan.module_ctor }]
41 @__asan_option_detect_stack_use_after_return = external global i32
42 @__asan_gen_ = private unnamed_addr constant [16 x i8] c"1 32 4 6 y.addr\00", align 1
44 ; Function Attrs: nounwind sanitize_address uwtable
45 define i32 @_Z3bari(i32 %y) #0 {
47 %MyAlloca = alloca [64 x i8], align 32
48 %0 = ptrtoint [64 x i8]* %MyAlloca to i64
49 %1 = load i32, i32* @__asan_option_detect_stack_use_after_return
50 %2 = icmp ne i32 %1, 0
51 br i1 %2, label %3, label %5
53 ; <label>:3 ; preds = %entry
54 %4 = call i64 @__asan_stack_malloc_0(i64 64, i64 %0)
57 ; <label>:5 ; preds = %entry, %3
58 %6 = phi i64 [ %0, %entry ], [ %4, %3 ]
60 %8 = inttoptr i64 %7 to i32*
61 %9 = inttoptr i64 %6 to i64*
62 store i64 1102416563, i64* %9
64 %11 = inttoptr i64 %10 to i64*
65 store i64 ptrtoint ([16 x i8]* @__asan_gen_ to i64), i64* %11
67 %13 = inttoptr i64 %12 to i64*
68 store i64 ptrtoint (i32 (i32)* @_Z3bari to i64), i64* %13
70 %15 = add i64 %14, 2147450880
72 %17 = inttoptr i64 %16 to i64*
73 store i64 -868083100587789839, i64* %17
74 %18 = ptrtoint i32* %8 to i64
76 %20 = add i64 %19, 2147450880
77 %21 = inttoptr i64 %20 to i8*
78 %22 = load i8, i8* %21
79 %23 = icmp ne i8 %22, 0
80 call void @llvm.dbg.declare(metadata i32* %8, metadata !12, metadata !14)
81 br i1 %23, label %24, label %30
83 ; <label>:24 ; preds = %5
86 %27 = trunc i64 %26 to i8
87 %28 = icmp sge i8 %27, %22
88 br i1 %28, label %29, label %30
90 ; <label>:29 ; preds = %24
91 call void @__asan_report_store4(i64 %18)
92 call void asm sideeffect "", ""()
95 ; <label>:30 ; preds = %24, %5
96 store i32 %y, i32* %8, align 4
97 %31 = ptrtoint i32* %8 to i64, !dbg !13
98 %32 = lshr i64 %31, 3, !dbg !13
99 %33 = add i64 %32, 2147450880, !dbg !13
100 %34 = inttoptr i64 %33 to i8*, !dbg !13
101 %35 = load i8, i8* %34, !dbg !13
102 %36 = icmp ne i8 %35, 0, !dbg !13
103 br i1 %36, label %37, label %43, !dbg !13
105 ; <label>:37 ; preds = %30
106 %38 = and i64 %31, 7, !dbg !13
107 %39 = add i64 %38, 3, !dbg !13
108 %40 = trunc i64 %39 to i8, !dbg !13
109 %41 = icmp sge i8 %40, %35, !dbg !13
110 br i1 %41, label %42, label %43
112 ; <label>:42 ; preds = %37
113 call void @__asan_report_load4(i64 %31), !dbg !13
114 call void asm sideeffect "", ""()
117 ; <label>:43 ; preds = %37, %30
118 %44 = load i32, i32* %8, align 4, !dbg !13
119 %add = add nsw i32 %44, 2, !dbg !13
120 store i64 1172321806, i64* %9, !dbg !13
121 %45 = icmp ne i64 %6, %0, !dbg !13
122 br i1 %45, label %46, label %53, !dbg !13
124 ; <label>:46 ; preds = %43
125 %47 = add i64 %15, 0, !dbg !13
126 %48 = inttoptr i64 %47 to i64*, !dbg !13
127 store i64 -723401728380766731, i64* %48, !dbg !13
128 %49 = add i64 %6, 56, !dbg !13
129 %50 = inttoptr i64 %49 to i64*, !dbg !13
130 %51 = load i64, i64* %50, !dbg !13
131 %52 = inttoptr i64 %51 to i8*, !dbg !13
132 store i8 0, i8* %52, !dbg !13
133 br label %56, !dbg !13
135 ; <label>:53 ; preds = %43
136 %54 = add i64 %15, 0, !dbg !13
137 %55 = inttoptr i64 %54 to i64*, !dbg !13
138 store i64 0, i64* %55, !dbg !13
139 br label %56, !dbg !13
141 ; <label>:56 ; preds = %53, %46
142 ret i32 %add, !dbg !13
145 ; Function Attrs: nounwind readnone
146 declare void @llvm.dbg.declare(metadata, metadata, metadata) #1
148 define internal void @asan.module_ctor() {
149 call void @__asan_init_v3()
153 declare void @__asan_init_v3()
155 declare void @__asan_report_load4(i64)
157 declare void @__asan_report_store4(i64)
159 declare i64 @__asan_stack_malloc_0(i64, i64)
161 attributes #0 = { nounwind sanitize_address uwtable "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
162 attributes #1 = { nounwind readnone }
165 !llvm.module.flags = !{!9, !10}
168 !0 = !MDCompileUnit(language: DW_LANG_C_plus_plus, producer: "clang version 3.5.0 (209308)", isOptimized: false, emissionKind: 1, file: !1, enums: !2, retainedTypes: !2, subprograms: !3, globals: !2, imports: !2)
169 !1 = !MDFile(filename: "test.cc", directory: "/llvm_cmake_gcc")
172 !4 = !MDSubprogram(name: "bar", linkageName: "_Z3bari", line: 1, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, scopeLine: 1, file: !1, scope: !5, type: !6, function: i32 (i32)* @_Z3bari, variables: !2)
173 !5 = !MDFile(filename: "test.cc", directory: "/llvm_cmake_gcc")
174 !6 = !MDSubroutineType(types: !7)
176 !8 = !MDBasicType(tag: DW_TAG_base_type, name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
177 !9 = !{i32 2, !"Dwarf Version", i32 4}
178 !10 = !{i32 2, !"Debug Info Version", i32 3}
179 !11 = !{!"clang version 3.5.0 (209308)"}
180 !12 = !MDLocalVariable(tag: DW_TAG_arg_variable, name: "y", line: 1, arg: 1, scope: !4, file: !5, type: !8)
181 !13 = !MDLocation(line: 2, scope: !4)
182 !14 = !MDExpression(DW_OP_deref)