1 ; RUN: opt < %s -passes=asan -asan-use-after-return=never -S | \
2 ; RUN: llc -O0 -filetype=obj - -o - | \
3 ; RUN: llvm-dwarfdump - | FileCheck %s
5 ; For this test case, ASan used to produce IR which resulted in the following
9 ; DW_AT_low_pc (0x0000000000000000)
10 ; DW_AT_high_pc (0x00000000000000f1)
13 ; DW_AT_location (0x00000000
14 ; [0x0000000000000014, 0x000000000000006d): DW_OP_breg0 RAX+32
15 ; [0x000000000000006d, 0x00000000000000a4): DW_OP_breg7 RSP+16, DW_OP_deref, DW_OP_plus_uconst 0x20
16 ; [0x00000000000000a6, 0x00000000000000ef): DW_OP_breg7 RSP+16, DW_OP_deref, DW_OP_plus_uconst 0x20)
18 ; The DWARF produced for the original ObjC code that motivated this test case
19 ; was actually not as nice! In that example, the location list ranges didn't
20 ; intersect with the ranges of the parent lexical scope. But recreating that
21 ; exactly requires playing tricks to get LiveDebugValue's lexical dominance
22 ; check to kill a variable range early, and it isn't strictly necessary to show
25 ; The problem is that we shouldn't get a location list at all. The instruction
26 ; selector should recognize that we have an "alloca" in the entry block, and
27 ; just make the fixed location available in the whole function. We now produce
28 ; the correct DWARF, namely:
30 ; CHECK: DW_TAG_variable
31 ; CHECK-NEXT: DW_AT_location (DW_OP_breg7 RSP+32, DW_OP_plus_uconst 0x20)
33 target triple = "x86_64-apple-macosx10.10.0"
35 declare void @escape(ptr)
37 ; Function Attrs: sanitize_address
38 define ptr @foo(i1 %cond) #0 !dbg !6 {
40 %a1 = alloca ptr, !dbg !12
41 call void @escape(ptr %a1), !dbg !13
42 br i1 %cond, label %l1, label %l2, !dbg !14
45 ret ptr null, !dbg !15
48 call void @llvm.dbg.declare(metadata ptr %a1, metadata !11, metadata !DIExpression()), !dbg !16
49 %p = load ptr, ptr %a1, !dbg !16
53 declare void @llvm.dbg.declare(metadata, metadata, metadata)
55 attributes #0 = { sanitize_address }
58 !llvm.debugify = !{!3, !4}
59 !llvm.module.flags = !{!5}
61 !0 = distinct !DICompileUnit(language: DW_LANG_C, file: !1, producer: "debugify", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2)
62 !1 = !DIFile(filename: "redu.ll", directory: "/")
66 !5 = !{i32 2, !"Debug Info Version", i32 3}
67 !6 = distinct !DISubprogram(name: "foo", linkageName: "foo", scope: null, file: !1, line: 1, type: !7, scopeLine: 1, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !8)
68 !7 = !DISubroutineType(types: !2)
70 !10 = !DIBasicType(name: "ty64", size: 64, encoding: DW_ATE_unsigned)
71 !11 = !DILocalVariable(name: "2", scope: !6, file: !1, line: 5, type: !10)
72 !12 = !DILocation(line: 1, column: 1, scope: !6)
73 !13 = !DILocation(line: 2, column: 1, scope: !6)
74 !14 = !DILocation(line: 3, column: 1, scope: !6)
75 !15 = !DILocation(line: 4, column: 1, scope: !6)
76 !16 = !DILocation(line: 5, column: 1, scope: !6)
77 !17 = !DILocation(line: 6, column: 1, scope: !6)