8b161bacf4
This is a follow up to D64971. While we need to insert the deref after the offset, it needs to come before the remaining elements in the original expression since the deref needs to happen before the LLVM fragment if present. Differential Revision: https://reviews.llvm.org/D65172 llvm-svn: 366865
102 lines
5.2 KiB
LLVM
102 lines
5.2 KiB
LLVM
; RUN: opt -safe-stack -S -mtriple=i386-pc-linux-gnu < %s -o - | FileCheck %s
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; Test llvm.dbg.value for the local variables moved onto the unsafe stack.
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; SafeStack rewrites them relative to the unsafe stack pointer (base address of
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; the unsafe stack frame).
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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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; Function Attrs: noinline safestack uwtable
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define void @f() #0 !dbg !6 {
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entry:
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; CHECK: %[[USP:.*]] = load i8*, i8** @__safestack_unsafe_stack_ptr
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%x1 = alloca i32, align 4
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%x2 = alloca i32, align 4
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%0 = bitcast i32* %x1 to i8*, !dbg !13
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%1 = bitcast i32* %x2 to i8*, !dbg !14
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; Unhandled dbg.value: expression does not start with OP_DW_deref
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; CHECK: call void @llvm.dbg.value(metadata ![[EMPTY:.*]], metadata !{{.*}}, metadata !{{.*}})
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tail call void @llvm.dbg.value(metadata i32* %x1, metadata !10, metadata !23), !dbg !16
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; Unhandled dbg.value: expression does not start with OP_DW_deref
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; CHECK: call void @llvm.dbg.value(metadata ![[EMPTY]], metadata !{{.*}}, metadata !{{.*}})
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tail call void @llvm.dbg.value(metadata i32* %x1, metadata !10, metadata !24), !dbg !16
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; Supported dbg.value: rewritted based on the [[USP]] value.
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; CHECK: call void @llvm.dbg.value(metadata i8* %[[USP]], metadata ![[X1:.*]], metadata !DIExpression(DW_OP_constu, 4, DW_OP_minus, DW_OP_deref, DW_OP_LLVM_fragment, 0, 4))
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tail call void @llvm.dbg.value(metadata i32* %x1, metadata !10, metadata !25), !dbg !16
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; Supported dbg.value: rewritted based on the [[USP]] value.
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; CHECK: call void @llvm.dbg.value(metadata i8* %[[USP]], metadata ![[X1:.*]], metadata !DIExpression(DW_OP_constu, 4, DW_OP_minus, DW_OP_deref))
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tail call void @llvm.dbg.value(metadata i32* %x1, metadata !10, metadata !15), !dbg !16
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call void @capture(i32* nonnull %x1), !dbg !17
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; An extra non-dbg.value metadata use of %x2. Replaced with an empty metadata.
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; CHECK: call void @llvm.random.metadata.use(metadata ![[EMPTY]])
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call void @llvm.random.metadata.use(metadata i32* %x2)
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; CHECK: call void @llvm.dbg.value(metadata i8* %[[USP]], metadata ![[X2:.*]], metadata !DIExpression(DW_OP_constu, 8, DW_OP_minus, DW_OP_deref))
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call void @llvm.dbg.value(metadata i32* %x2, metadata !12, metadata !15), !dbg !18
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call void @capture(i32* nonnull %x2), !dbg !19
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ret void, !dbg !20
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}
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; Function Attrs: argmemonly nounwind
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declare void @llvm.lifetime.start.p0i8(i64, i8* nocapture) #1
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declare void @capture(i32*) #2
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; Function Attrs: argmemonly nounwind
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declare void @llvm.lifetime.end.p0i8(i64, i8* nocapture) #1
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; Function Attrs: nounwind readnone
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declare void @llvm.dbg.value(metadata, metadata, metadata) #3
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declare void @llvm.random.metadata.use(metadata)
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attributes #0 = { noinline safestack uwtable "disable-tail-calls"="false" "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-infs-fp-math"="false" "no-jump-tables"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+fxsr,+mmx,+sse,+sse2,+x87" "unsafe-fp-math"="false" "use-soft-float"="false" }
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attributes #1 = { argmemonly nounwind }
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attributes #2 = { "disable-tail-calls"="false" "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "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,+x87" "unsafe-fp-math"="false" "use-soft-float"="false" }
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attributes #3 = { nounwind readnone }
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attributes #4 = { nounwind }
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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 271022) (llvm/trunk 271027)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2)
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!1 = !DIFile(filename: "../llvm/2.cc", directory: "/code/build-llvm")
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; CHECK-DAG: ![[EMPTY]] = !{}
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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 271022) (llvm/trunk 271027)"}
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!6 = distinct !DISubprogram(name: "f", linkageName: "_Z1fv", scope: !1, file: !1, line: 4, type: !7, isLocal: false, isDefinition: true, scopeLine: 4, flags: DIFlagPrototyped, isOptimized: true, unit: !0, retainedNodes: !9)
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!7 = !DISubroutineType(types: !8)
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!8 = !{null}
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!9 = !{!10, !12}
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; CHECK-DAG: ![[X1]] = !DILocalVariable(name: "x1",
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!10 = !DILocalVariable(name: "x1", scope: !6, file: !1, line: 5, type: !11)
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!11 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
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; CHECK-DAG: ![[X2]] = !DILocalVariable(name: "x2",
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!12 = !DILocalVariable(name: "x2", scope: !6, file: !1, line: 6, type: !11)
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!13 = !DILocation(line: 5, column: 3, scope: !6)
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!14 = !DILocation(line: 6, column: 3, scope: !6)
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!15 = !DIExpression(DW_OP_deref)
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!16 = !DILocation(line: 5, column: 7, scope: !6)
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!17 = !DILocation(line: 8, column: 3, scope: !6)
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!18 = !DILocation(line: 6, column: 7, scope: !6)
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!19 = !DILocation(line: 9, column: 3, scope: !6)
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!20 = !DILocation(line: 10, column: 1, scope: !6)
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!21 = !DILocation(line: 10, column: 1, scope: !22)
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!22 = !DILexicalBlockFile(scope: !6, file: !1, discriminator: 1)
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!23 = !DIExpression()
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!24 = !DIExpression(DW_OP_constu, 42, DW_OP_minus)
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!25 = !DIExpression(DW_OP_deref, DW_OP_LLVM_fragment, 0, 4)
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