1 ; RUN: opt -safe-stack -safestack-use-pointer-address < %s -S | FileCheck %s
2 ; RUN: opt -passes=safe-stack -safestack-use-pointer-address < %s -S | FileCheck %s
3 target datalayout = "e-m:e-p:32:32-i64:64-v128:64:128-a:0:32-n32-S64"
4 target triple = "armv7-pc-linux-android"
6 ; Original C used to generate debug info:
8 ; char** __safestack_pointer_address() {
11 ; void Capture(char*x);
12 ; void f() { char c[16]; Capture(c); }
14 ; CHECK: !36 = !DILocation(line: 3, column: 11, scope: !17, inlinedAt: !37)
15 ; CHECK: !37 = distinct !DILocation(line: 6, scope: !27)
17 @addr = common local_unnamed_addr global ptr null, align 4, !dbg !0
19 ; Function Attrs: norecurse nounwind readonly safestack
20 define ptr @__safestack_pointer_address() local_unnamed_addr #0 !dbg !17 {
22 %0 = load ptr, ptr @addr, align 4, !dbg !20, !tbaa !21
23 %1 = load ptr, ptr %0, align 4, !dbg !25, !tbaa !21
27 ; Function Attrs: nounwind safestack
28 define void @f() local_unnamed_addr #1 !dbg !27 {
30 %c = alloca [16 x i8], align 1
31 call void @llvm.lifetime.start.p0(i64 16, ptr nonnull %c) #5, !dbg !35
32 call void @llvm.dbg.declare(metadata ptr %c, metadata !31, metadata !DIExpression()), !dbg !36
33 call void @Capture(ptr nonnull %c) #5, !dbg !37
34 call void @llvm.lifetime.end.p0(i64 16, ptr nonnull %c) #5, !dbg !38
38 ; Function Attrs: argmemonly nounwind
39 declare void @llvm.lifetime.start.p0(i64, ptr nocapture) #2
41 ; Function Attrs: nounwind readnone speculatable
42 declare void @llvm.dbg.declare(metadata, metadata, metadata) #3
44 declare void @Capture(ptr) local_unnamed_addr #4
46 ; Function Attrs: argmemonly nounwind
47 declare void @llvm.lifetime.end.p0(i64, ptr nocapture) #2
49 attributes #0 = { norecurse nounwind readonly safestack "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "less-precise-fpmad"="false" "frame-pointer"="all" "no-infs-fp-math"="false" "no-jump-tables"="false" "no-nans-fp-math"="false" "no-signed-zeros-fp-math"="false" "no-trapping-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="generic" "target-features"="+armv7-a,+dsp,+neon,+vfp3,-thumb-mode" "unsafe-fp-math"="false" "use-soft-float"="false" }
50 attributes #1 = { nounwind safestack "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "less-precise-fpmad"="false" "frame-pointer"="all" "no-infs-fp-math"="false" "no-jump-tables"="false" "no-nans-fp-math"="false" "no-signed-zeros-fp-math"="false" "no-trapping-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="generic" "target-features"="+armv7-a,+dsp,+neon,+vfp3,-thumb-mode" "unsafe-fp-math"="false" "use-soft-float"="false" }
51 attributes #2 = { argmemonly nounwind }
52 attributes #3 = { nounwind readnone speculatable }
53 attributes #4 = { "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "less-precise-fpmad"="false" "frame-pointer"="all" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "no-signed-zeros-fp-math"="false" "no-trapping-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="generic" "target-features"="+armv7-a,+dsp,+neon,+vfp3,-thumb-mode" "unsafe-fp-math"="false" "use-soft-float"="false" }
54 attributes #5 = { nounwind }
57 !llvm.module.flags = !{!11, !12, !13, !14, !15}
60 !0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression())
61 !1 = distinct !DIGlobalVariable(name: "addr", scope: !2, file: !6, line: 1, type: !7, isLocal: false, isDefinition: true)
62 !2 = distinct !DICompileUnit(language: DW_LANG_C99, file: !3, producer: "clang", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !4, globals: !5)
63 !3 = !DIFile(filename: "-", directory: "/")
66 !6 = !DIFile(filename: "<stdin>", directory: "/")
67 !7 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !8, size: 32)
68 !8 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !9, size: 32)
69 !9 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !10, size: 32)
70 !10 = !DIBasicType(name: "char", size: 8, encoding: DW_ATE_unsigned_char)
71 !11 = !{i32 2, !"Dwarf Version", i32 4}
72 !12 = !{i32 2, !"Debug Info Version", i32 3}
73 !13 = !{i32 1, !"wchar_size", i32 4}
74 !14 = !{i32 1, !"min_enum_size", i32 4}
75 !15 = !{i32 7, !"PIC Level", i32 1}
77 !17 = distinct !DISubprogram(name: "__safestack_pointer_address", scope: !6, file: !6, line: 2, type: !18, isLocal: false, isDefinition: true, scopeLine: 2, isOptimized: true, unit: !2, retainedNodes: !4)
78 !18 = !DISubroutineType(types: !19)
80 !20 = !DILocation(line: 3, column: 11, scope: !17)
81 !21 = !{!22, !22, i64 0}
82 !22 = !{!"any pointer", !23, i64 0}
83 !23 = !{!"omnipotent char", !24, i64 0}
84 !24 = !{!"Simple C/C++ TBAA"}
85 !25 = !DILocation(line: 3, column: 10, scope: !17)
86 !26 = !DILocation(line: 3, column: 3, scope: !17)
87 !27 = distinct !DISubprogram(name: "f", scope: !6, file: !6, line: 6, type: !28, isLocal: false, isDefinition: true, scopeLine: 6, isOptimized: true, unit: !2, retainedNodes: !30)
88 !28 = !DISubroutineType(types: !29)
91 !31 = !DILocalVariable(name: "c", scope: !27, file: !6, line: 6, type: !32)
92 !32 = !DICompositeType(tag: DW_TAG_array_type, baseType: !10, size: 128, elements: !33)
94 !34 = !DISubrange(count: 16)
95 !35 = !DILocation(line: 6, column: 12, scope: !27)
96 !36 = !DILocation(line: 6, column: 17, scope: !27)
97 !37 = !DILocation(line: 6, column: 24, scope: !27)
98 !38 = !DILocation(line: 6, column: 36, scope: !27)