1; RUN: opt -safe-stack -S -mtriple=i386-pc-linux-gnu < %s -o - | FileCheck %s
2
3; Test debug location for the local variables moved onto the unsafe stack.
4
5target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
6target triple = "x86_64-unknown-linux-gnu"
7
8%struct.S = type { [100 x i8] }
9
10; Function Attrs: safestack uwtable
11define void @f(%struct.S* byval(%struct.S) align 8 %zzz) #0 !dbg !12 {
12; CHECK: define void @f
13
14entry:
15; CHECK: %[[USP:.*]] = load i8*, i8** @__safestack_unsafe_stack_ptr
16
17  %xxx = alloca %struct.S, align 1
18  call void @llvm.dbg.declare(metadata %struct.S* %zzz, metadata !18, metadata !19), !dbg !20
19  call void @llvm.dbg.declare(metadata %struct.S* %xxx, metadata !21, metadata !19), !dbg !22
20
21; dbg.declare for %zzz and %xxx are gone; replaced with dbg.declare based off the unsafe stack pointer
22; CHECK-NOT: call void @llvm.dbg.declare
23; CHECK: call void @llvm.dbg.declare(metadata i8* %[[USP]], metadata ![[VAR_ARG:.*]], metadata !DIExpression(DW_OP_constu, 104, DW_OP_minus))
24; CHECK-NOT: call void @llvm.dbg.declare
25; CHECK: call void @llvm.dbg.declare(metadata i8* %[[USP]], metadata ![[VAR_LOCAL:.*]], metadata !DIExpression(DW_OP_constu, 208, DW_OP_minus))
26; CHECK-NOT: call void @llvm.dbg.declare
27
28  call void @Capture(%struct.S* %zzz), !dbg !23
29  call void @Capture(%struct.S* %xxx), !dbg !24
30
31; dbg.declare appears before the first use
32; CHECK:   call void @Capture
33; CHECK:   call void @Capture
34
35  ret void, !dbg !25
36}
37
38; CHECK-DAG: ![[VAR_ARG]] = !DILocalVariable(name: "zzz"
39; 100 aligned up to 8
40
41; CHECK-DAG: ![[VAR_LOCAL]] = !DILocalVariable(name: "xxx"
42
43; Function Attrs: nounwind readnone
44declare void @llvm.dbg.declare(metadata, metadata, metadata) #1
45
46declare void @Capture(%struct.S*) #2
47
48attributes #0 = { safestack uwtable "disable-tail-calls"="false" "less-precise-fpmad"="false" "frame-pointer"="all" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+fxsr,+mmx,+sse,+sse2" "unsafe-fp-math"="false" "use-soft-float"="false" }
49attributes #1 = { nounwind readnone }
50attributes #2 = { "disable-tail-calls"="false" "less-precise-fpmad"="false" "frame-pointer"="all" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+fxsr,+mmx,+sse,+sse2" "unsafe-fp-math"="false" "use-soft-float"="false" }
51
52!llvm.dbg.cu = !{!0}
53!llvm.module.flags = !{!15, !16}
54!llvm.ident = !{!17}
55
56!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, producer: "clang version 3.8.0 (trunk 254019) (llvm/trunk 254036)", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, retainedTypes: !3)
57!1 = !DIFile(filename: "../llvm/2.cc", directory: "/code/build-llvm")
58!2 = !{}
59!3 = !{!4}
60!4 = !DICompositeType(tag: DW_TAG_structure_type, name: "S", file: !1, line: 4, size: 800, align: 8, elements: !5, identifier: "_ZTS1S")
61!5 = !{!6}
62!6 = !DIDerivedType(tag: DW_TAG_member, name: "a", scope: !4, file: !1, line: 5, baseType: !7, size: 800, align: 8)
63!7 = !DICompositeType(tag: DW_TAG_array_type, baseType: !8, size: 800, align: 8, elements: !9)
64!8 = !DIBasicType(name: "char", size: 8, align: 8, encoding: DW_ATE_signed_char)
65!9 = !{!10}
66!10 = !DISubrange(count: 100)
67!12 = distinct !DISubprogram(name: "f", linkageName: "_Z1f1S", scope: !1, file: !1, line: 10, type: !13, isLocal: false, isDefinition: true, scopeLine: 10, flags: DIFlagPrototyped, isOptimized: false, unit: !0, retainedNodes: !2)
68!13 = !DISubroutineType(types: !14)
69!14 = !{null, !4}
70!15 = !{i32 2, !"Dwarf Version", i32 4}
71!16 = !{i32 2, !"Debug Info Version", i32 3}
72!17 = !{!"clang version 3.8.0 (trunk 254019) (llvm/trunk 254036)"}
73!18 = !DILocalVariable(name: "zzz", arg: 1, scope: !12, file: !1, line: 10, type: !4)
74!19 = !DIExpression()
75!20 = !DILocation(line: 10, column: 10, scope: !12)
76!21 = !DILocalVariable(name: "xxx", scope: !12, file: !1, line: 11, type: !4)
77!22 = !DILocation(line: 11, column: 5, scope: !12)
78!23 = !DILocation(line: 12, column: 3, scope: !12)
79!24 = !DILocation(line: 13, column: 3, scope: !12)
80!25 = !DILocation(line: 14, column: 1, scope: !12)
81