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1; RUN: opt -safe-stack -S -mtriple=i386-pc-linux-gnu < %s -o - | FileCheck %s2; RUN: opt -passes=safe-stack -S -mtriple=i386-pc-linux-gnu < %s -o - | FileCheck %s3 4; Test llvm.dbg.value for the local variables moved onto the unsafe stack.5; SafeStack rewrites them relative to the unsafe stack pointer (base address of6; the unsafe stack frame).7 8target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"9target triple = "x86_64-unknown-linux-gnu"10 11; Function Attrs: noinline safestack uwtable12define void @f() #0 !dbg !6 {13entry:14; CHECK: %[[USP:.*]] = load ptr, ptr @__safestack_unsafe_stack_ptr15 %x1 = alloca i32, align 416 %x2 = alloca i32, align 417 18; Unhandled dbg.value: expression does not start with OP_DW_deref19; CHECK: #dbg_value(ptr poison, !{{.*}}, !{{.*}})20 tail call void @llvm.dbg.value(metadata ptr %x1, metadata !10, metadata !23), !dbg !1621 22; Unhandled dbg.value: expression does not start with OP_DW_deref23; CHECK: #dbg_value(ptr poison, !{{.*}}, !{{.*}})24 tail call void @llvm.dbg.value(metadata ptr %x1, metadata !10, metadata !24), !dbg !1625 26; Supported dbg.value: rewritted based on the [[USP]] value.27; CHECK: #dbg_value(ptr %[[USP]], ![[X1:.*]], !DIExpression(DW_OP_constu, 4, DW_OP_minus, DW_OP_deref, DW_OP_LLVM_fragment, 0, 4),28 tail call void @llvm.dbg.value(metadata ptr %x1, metadata !10, metadata !25), !dbg !1629 30; Supported dbg.value: rewritted based on the [[USP]] value.31; CHECK: #dbg_value(ptr %[[USP]], ![[X1:.*]], !DIExpression(DW_OP_constu, 4, DW_OP_minus, DW_OP_deref),32 tail call void @llvm.dbg.value(metadata ptr %x1, metadata !10, metadata !15), !dbg !1633 call void @capture(ptr nonnull %x1), !dbg !1734 35; An extra non-dbg.value metadata use of %x2. Replaced with poison.36; CHECK: call void @llvm.random.metadata.use(metadata ptr poison37 call void @llvm.random.metadata.use(metadata ptr %x2)38 39; CHECK: #dbg_value(ptr %[[USP]], ![[X2:.*]], !DIExpression(DW_OP_constu, 8, DW_OP_minus, DW_OP_deref),40 call void @llvm.dbg.value(metadata ptr %x2, metadata !12, metadata !15), !dbg !1841 call void @capture(ptr nonnull %x2), !dbg !1942 ret void, !dbg !2043}44 45; Function Attrs: argmemonly nounwind46declare void @llvm.lifetime.start.p0(ptr nocapture) #147 48declare void @capture(ptr)49 50; Function Attrs: argmemonly nounwind51declare void @llvm.lifetime.end.p0(ptr nocapture) #152 53; Function Attrs: nounwind readnone54declare void @llvm.dbg.value(metadata, metadata, metadata) #355 56declare void @llvm.random.metadata.use(metadata)57 58attributes #0 = { noinline safestack uwtable }59attributes #1 = { argmemonly nounwind }60attributes #3 = { nounwind readnone }61attributes #4 = { nounwind }62 63!llvm.dbg.cu = !{!0}64!llvm.module.flags = !{!3, !4}65!llvm.ident = !{!5}66 67!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)68!1 = !DIFile(filename: "../llvm/2.cc", directory: "/code/build-llvm")69 70!2 = !{}71!3 = !{i32 2, !"Dwarf Version", i32 4}72!4 = !{i32 2, !"Debug Info Version", i32 3}73!5 = !{!"clang version 3.9.0 (trunk 271022) (llvm/trunk 271027)"}74!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)75!7 = !DISubroutineType(types: !8)76!8 = !{null}77!9 = !{!10, !12}78 79; CHECK-DAG: ![[X1]] = !DILocalVariable(name: "x1",80!10 = !DILocalVariable(name: "x1", scope: !6, file: !1, line: 5, type: !11)81!11 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed)82 83; CHECK-DAG: ![[X2]] = !DILocalVariable(name: "x2",84!12 = !DILocalVariable(name: "x2", scope: !6, file: !1, line: 6, type: !11)85!13 = !DILocation(line: 5, column: 3, scope: !6)86!14 = !DILocation(line: 6, column: 3, scope: !6)87 88!15 = !DIExpression(DW_OP_deref)89!16 = !DILocation(line: 5, column: 7, scope: !6)90!17 = !DILocation(line: 8, column: 3, scope: !6)91!18 = !DILocation(line: 6, column: 7, scope: !6)92!19 = !DILocation(line: 9, column: 3, scope: !6)93!20 = !DILocation(line: 10, column: 1, scope: !6)94!21 = !DILocation(line: 10, column: 1, scope: !22)95!22 = !DILexicalBlockFile(scope: !6, file: !1, discriminator: 1)96!23 = !DIExpression()97!24 = !DIExpression(DW_OP_constu, 42, DW_OP_minus)98!25 = !DIExpression(DW_OP_deref, DW_OP_LLVM_fragment, 0, 4)99