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 5 target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128" 6 target triple = "x86_64-unknown-linux-gnu" 7 8 %struct.S = type { [100 x i8] } 9 10 ; Function Attrs: safestack uwtable 11 define void @f(%struct.S* byval align 8 %zzz) #0 !dbg !12 { 12 ; CHECK: define void @f 13 14 entry: 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 ![[EXPR_ARG:.*]]) 24 ; CHECK-NOT: call void @llvm.dbg.declare 25 ; CHECK: call void @llvm.dbg.declare(metadata i8* %[[USP]], metadata ![[VAR_LOCAL:.*]], metadata ![[EXPR_LOCAL:.*]]) 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 ; CHECK-DAG: ![[EXPR_ARG]] = !DIExpression(DW_OP_deref, DW_OP_minus, 104 41 42 ; CHECK-DAG: ![[VAR_LOCAL]] = !DILocalVariable(name: "xxx" 43 ; CHECK-DAG: ![[EXPR_LOCAL]] = !DIExpression(DW_OP_deref, DW_OP_minus, 208 44 45 ; Function Attrs: nounwind readnone 46 declare void @llvm.dbg.declare(metadata, metadata, metadata) #1 47 48 declare void @Capture(%struct.S*) #2 49 50 attributes #0 = { safestack uwtable "disable-tail-calls"="false" "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" "target-cpu"="x86-64" "target-features"="+fxsr,+mmx,+sse,+sse2" "unsafe-fp-math"="false" "use-soft-float"="false" } 51 attributes #1 = { nounwind readnone } 52 attributes #2 = { "disable-tail-calls"="false" "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" "target-cpu"="x86-64" "target-features"="+fxsr,+mmx,+sse,+sse2" "unsafe-fp-math"="false" "use-soft-float"="false" } 53 54 !llvm.dbg.cu = !{!0} 55 !llvm.module.flags = !{!15, !16} 56 !llvm.ident = !{!17} 57 58 !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: 1, enums: !2, retainedTypes: !3, subprograms: !11) 59 !1 = !DIFile(filename: "../llvm/2.cc", directory: "/code/build-llvm") 60 !2 = !{} 61 !3 = !{!4} 62 !4 = !DICompositeType(tag: DW_TAG_structure_type, name: "S", file: !1, line: 4, size: 800, align: 8, elements: !5, identifier: "_ZTS1S") 63 !5 = !{!6} 64 !6 = !DIDerivedType(tag: DW_TAG_member, name: "a", scope: !"_ZTS1S", file: !1, line: 5, baseType: !7, size: 800, align: 8) 65 !7 = !DICompositeType(tag: DW_TAG_array_type, baseType: !8, size: 800, align: 8, elements: !9) 66 !8 = !DIBasicType(name: "char", size: 8, align: 8, encoding: DW_ATE_signed_char) 67 !9 = !{!10} 68 !10 = !DISubrange(count: 100) 69 !11 = !{!12} 70 !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, variables: !2) 71 !13 = !DISubroutineType(types: !14) 72 !14 = !{null, !"_ZTS1S"} 73 !15 = !{i32 2, !"Dwarf Version", i32 4} 74 !16 = !{i32 2, !"Debug Info Version", i32 3} 75 !17 = !{!"clang version 3.8.0 (trunk 254019) (llvm/trunk 254036)"} 76 !18 = !DILocalVariable(name: "zzz", arg: 1, scope: !12, file: !1, line: 10, type: !"_ZTS1S") 77 !19 = !DIExpression() 78 !20 = !DILocation(line: 10, column: 10, scope: !12) 79 !21 = !DILocalVariable(name: "xxx", scope: !12, file: !1, line: 11, type: !"_ZTS1S") 80 !22 = !DILocation(line: 11, column: 5, scope: !12) 81 !23 = !DILocation(line: 12, column: 3, scope: !12) 82 !24 = !DILocation(line: 13, column: 3, scope: !12) 83 !25 = !DILocation(line: 14, column: 1, scope: !12) 84
