81 lines
4.1 KiB
LLVM
81 lines
4.1 KiB
LLVM
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; RUN: opt -safe-stack -S -mtriple=i386-pc-linux-gnu < %s -o - | FileCheck %s
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; Test debug location for the local variables moved onto the unsafe stack.
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target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-unknown-linux-gnu"
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%struct.S = type { [100 x i8] }
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; Function Attrs: safestack uwtable
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define void @f(%struct.S* byval(%struct.S) align 8 %zzz) #0 !dbg !12 {
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; CHECK: define void @f
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entry:
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; CHECK: %[[USP:.*]] = load i8*, i8** @__safestack_unsafe_stack_ptr
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%xxx = alloca %struct.S, align 1
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call void @llvm.dbg.declare(metadata %struct.S* %zzz, metadata !18, metadata !19), !dbg !20
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call void @llvm.dbg.declare(metadata %struct.S* %xxx, metadata !21, metadata !19), !dbg !22
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; dbg.declare for %zzz and %xxx are gone; replaced with dbg.declare based off the unsafe stack pointer
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; CHECK-NOT: call void @llvm.dbg.declare
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; CHECK: call void @llvm.dbg.declare(metadata i8* %[[USP]], metadata ![[VAR_ARG:.*]], metadata !DIExpression(DW_OP_constu, 104, DW_OP_minus))
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; CHECK-NOT: call void @llvm.dbg.declare
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; CHECK: call void @llvm.dbg.declare(metadata i8* %[[USP]], metadata ![[VAR_LOCAL:.*]], metadata !DIExpression(DW_OP_constu, 208, DW_OP_minus))
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; CHECK-NOT: call void @llvm.dbg.declare
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call void @Capture(%struct.S* %zzz), !dbg !23
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call void @Capture(%struct.S* %xxx), !dbg !24
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; dbg.declare appears before the first use
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; CHECK: call void @Capture
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; CHECK: call void @Capture
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ret void, !dbg !25
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}
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; CHECK-DAG: ![[VAR_ARG]] = !DILocalVariable(name: "zzz"
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; 100 aligned up to 8
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; CHECK-DAG: ![[VAR_LOCAL]] = !DILocalVariable(name: "xxx"
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; Function Attrs: nounwind readnone
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declare void @llvm.dbg.declare(metadata, metadata, metadata) #1
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declare void @Capture(%struct.S*) #2
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attributes #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" }
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attributes #1 = { nounwind readnone }
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attributes #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" }
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!15, !16}
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!llvm.ident = !{!17}
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!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)
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!1 = !DIFile(filename: "../llvm/2.cc", directory: "/code/build-llvm")
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!2 = !{}
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!3 = !{!4}
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!4 = !DICompositeType(tag: DW_TAG_structure_type, name: "S", file: !1, line: 4, size: 800, align: 8, elements: !5, identifier: "_ZTS1S")
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!5 = !{!6}
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!6 = !DIDerivedType(tag: DW_TAG_member, name: "a", scope: !4, file: !1, line: 5, baseType: !7, size: 800, align: 8)
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!7 = !DICompositeType(tag: DW_TAG_array_type, baseType: !8, size: 800, align: 8, elements: !9)
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!8 = !DIBasicType(name: "char", size: 8, align: 8, encoding: DW_ATE_signed_char)
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!9 = !{!10}
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!10 = !DISubrange(count: 100)
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!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)
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!13 = !DISubroutineType(types: !14)
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!14 = !{null, !4}
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!15 = !{i32 2, !"Dwarf Version", i32 4}
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!16 = !{i32 2, !"Debug Info Version", i32 3}
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!17 = !{!"clang version 3.8.0 (trunk 254019) (llvm/trunk 254036)"}
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!18 = !DILocalVariable(name: "zzz", arg: 1, scope: !12, file: !1, line: 10, type: !4)
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!19 = !DIExpression()
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!20 = !DILocation(line: 10, column: 10, scope: !12)
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!21 = !DILocalVariable(name: "xxx", scope: !12, file: !1, line: 11, type: !4)
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!22 = !DILocation(line: 11, column: 5, scope: !12)
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!23 = !DILocation(line: 12, column: 3, scope: !12)
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!24 = !DILocation(line: 13, column: 3, scope: !12)
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!25 = !DILocation(line: 14, column: 1, scope: !12)
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