forked from OSchip/llvm-project
58 lines
2.6 KiB
LLVM
58 lines
2.6 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 llvm.dbg.value for dynamic allocas moved onto the unsafe stack.
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; In the dynamic alloca case, the dbg.value does not change with the exception
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; of the alloca pointer in the first argument being replaced with the new stack
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; top address.
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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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define void @f(i32 %n) safestack !dbg !6 {
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entry:
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tail call void @llvm.dbg.value(metadata i32 %n, i64 0, metadata !11, metadata !14), !dbg !15
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%0 = zext i32 %n to i64, !dbg !16
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; CHECK: store i8* %[[VLA:.*]], i8** @__safestack_unsafe_stack_ptr
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; CHECK: tail call void @llvm.dbg.value(metadata i8* %[[VLA]], i64 0, metadata ![[TYPE:.*]], metadata ![[EXPR:.*]])
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; CHECK: call void @capture({{.*}} %[[VLA]])
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%vla = alloca i8, i64 %0, align 16, !dbg !16
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tail call void @llvm.dbg.value(metadata i8* %vla, i64 0, metadata !12, metadata !17), !dbg !18
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call void @capture(i8* nonnull %vla), !dbg !19
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ret void, !dbg !20
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}
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declare void @capture(i8*)
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declare void @llvm.dbg.value(metadata, i64, metadata, metadata)
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!3, !4}
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!llvm.ident = !{!5}
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!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, producer: "clang version 3.9.0 (trunk 272832) (llvm/trunk 272831)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2)
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!1 = !DIFile(filename: "../llvm/1.cc", directory: "/code/build-llvm")
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!2 = !{}
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!3 = !{i32 2, !"Dwarf Version", i32 4}
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!4 = !{i32 2, !"Debug Info Version", i32 3}
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!5 = !{!"clang version 3.9.0 (trunk 272832) (llvm/trunk 272831)"}
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!6 = distinct !DISubprogram(name: "f", linkageName: "_Z1fi", scope: !1, file: !1, line: 2, type: !7, isLocal: false, isDefinition: true, scopeLine: 2, flags: DIFlagPrototyped, isOptimized: true, unit: !0, variables: !10)
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!7 = !DISubroutineType(types: !8)
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!8 = !{null, !9}
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!9 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
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!10 = !{!11, !12}
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!11 = !DILocalVariable(name: "n", arg: 1, scope: !6, file: !1, line: 2, type: !9)
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; CHECK-DAG: ![[TYPE]] = !DILocalVariable(name: "x",
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!12 = !DILocalVariable(name: "x", scope: !6, file: !1, line: 3, type: !13)
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!13 = !DIBasicType(name: "char", size: 8, align: 8, encoding: DW_ATE_signed_char)
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!14 = !DIExpression()
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!15 = !DILocation(line: 2, column: 12, scope: !6)
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!16 = !DILocation(line: 3, column: 3, scope: !6)
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; CHECK-DAG: ![[EXPR]] = !DIExpression(DW_OP_deref)
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!17 = !DIExpression(DW_OP_deref)
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!18 = !DILocation(line: 3, column: 8, scope: !6)
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!19 = !DILocation(line: 4, column: 3, scope: !6)
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!20 = !DILocation(line: 5, column: 1, scope: !6)
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