1; RUN: opt < %s -asan -asan-module -asan-use-after-return=0 -S | FileCheck %s
2
3; Checks that llvm.dbg.declare instructions are updated
4; accordingly as we merge allocas.
5
6target 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"
7target triple = "x86_64-unknown-linux-gnu"
8
9define i32 @_Z3zzzi(i32 %p) nounwind uwtable sanitize_address {
10entry:
11  %p.addr = alloca i32, align 4
12  %r = alloca i32, align 4
13  store volatile i32 %p, i32* %p.addr, align 4
14  call void @llvm.dbg.declare(metadata i32* %p.addr, metadata !10, metadata !MDExpression()), !dbg !11
15  call void @llvm.dbg.declare(metadata i32* %r, metadata !12, metadata !MDExpression()), !dbg !14
16  %0 = load i32, i32* %p.addr, align 4, !dbg !14
17  %add = add nsw i32 %0, 1, !dbg !14
18  store volatile i32 %add, i32* %r, align 4, !dbg !14
19  %1 = load i32, i32* %r, align 4, !dbg !15
20  ret i32 %1, !dbg !15
21}
22
23;   CHECK: define i32 @_Z3zzzi
24;   CHECK: entry:
25; Verify that llvm.dbg.declare calls are in the entry basic block.
26;   CHECK-NOT: %entry
27;   CHECK: call void @llvm.dbg.declare(metadata {{.*}}, metadata ![[ARG_ID:[0-9]+]], metadata ![[OPDEREF:[0-9]+]])
28;   CHECK-NOT: %entry
29;   CHECK: call void @llvm.dbg.declare(metadata {{.*}}, metadata ![[VAR_ID:[0-9]+]], metadata ![[OPDEREF:[0-9]+]])
30
31declare void @llvm.dbg.declare(metadata, metadata, metadata) nounwind readnone
32
33!llvm.dbg.cu = !{!0}
34!llvm.module.flags = !{!17}
35
36!0 = !MDCompileUnit(language: DW_LANG_C_plus_plus, producer: "clang version 3.3 (trunk 169314)", isOptimized: true, emissionKind: 0, file: !16, enums: !1, retainedTypes: !1, subprograms: !3, globals: !1)
37!1 = !{}
38!3 = !{!5}
39!5 = !MDSubprogram(name: "zzz", linkageName: "_Z3zzzi", line: 1, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, scopeLine: 1, file: !16, scope: !6, type: !7, function: i32 (i32)* @_Z3zzzi, variables: !1)
40!6 = !MDFile(filename: "a.cc", directory: "/usr/local/google/llvm_cmake_clang/tmp/debuginfo")
41!7 = !MDSubroutineType(types: !8)
42!8 = !{!9, !9}
43!9 = !MDBasicType(tag: DW_TAG_base_type, name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
44!10 = !MDLocalVariable(tag: DW_TAG_arg_variable, name: "p", line: 1, arg: 1, scope: !5, file: !6, type: !9)
45!11 = !MDLocation(line: 1, scope: !5)
46!12 = !MDLocalVariable(tag: DW_TAG_auto_variable, name: "r", line: 2, scope: !13, file: !6, type: !9)
47
48; Verify that debug descriptors for argument and local variable will be replaced
49; with descriptors that end with OpDeref (encoded as 2).
50;   CHECK: ![[ARG_ID]] = !MDLocalVariable(tag: DW_TAG_arg_variable, name: "p", arg: 1,{{.*}} line: 1
51;   CHECK: ![[OPDEREF]] = !MDExpression(DW_OP_deref)
52;   CHECK: ![[VAR_ID]] = !MDLocalVariable(tag: DW_TAG_auto_variable, name: "r",{{.*}} line: 2
53; Verify that there are no more variable descriptors.
54;   CHECK-NOT: !MDLocalVariable(tag: DW_TAG_arg_variable
55;   CHECK-NOT: !MDLocalVariable(tag: DW_TAG_auto_variable
56
57
58!13 = distinct !MDLexicalBlock(line: 1, column: 0, file: !16, scope: !5)
59!14 = !MDLocation(line: 2, scope: !13)
60!15 = !MDLocation(line: 3, scope: !13)
61!16 = !MDFile(filename: "a.cc", directory: "/usr/local/google/llvm_cmake_clang/tmp/debuginfo")
62!17 = !{i32 1, !"Debug Info Version", i32 3}
63