1; RUN: opt -safe-stack -S -mtriple=i386-pc-linux-gnu < %s -o - | FileCheck %s 2; RUN: opt -safe-stack -S -mtriple=i386-pc-linux-gnu < %s -o - --try-experimental-debuginfo-iterators | FileCheck %s 3; RUN: opt -passes=safe-stack -S -mtriple=i386-pc-linux-gnu < %s -o - | FileCheck %s 4; RUN: opt -passes=safe-stack -S -mtriple=i386-pc-linux-gnu < %s -o - --try-experimental-debuginfo-iterators | FileCheck %s 5 6; Test llvm.dbg.value for dynamic allocas moved onto the unsafe stack. 7; In the dynamic alloca case, the dbg.value does not change with the exception 8; of the alloca pointer in the first argument being replaced with the new stack 9; top address. 10 11target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128" 12target triple = "x86_64-unknown-linux-gnu" 13 14define void @f(i32 %n) safestack !dbg !6 { 15entry: 16 tail call void @llvm.dbg.value(metadata i32 %n, metadata !11, metadata !14), !dbg !15 17 %0 = zext i32 %n to i64, !dbg !16 18 19; CHECK: store ptr %[[VLA:.*]], ptr @__safestack_unsafe_stack_ptr 20; CHECK: #dbg_value(ptr %[[VLA]], ![[TYPE:.*]], !DIExpression(DW_OP_deref), 21; CHECK: call void @capture({{.*}} %[[VLA]]) 22 23 %vla = alloca i8, i64 %0, align 16, !dbg !16 24 tail call void @llvm.dbg.value(metadata ptr %vla, metadata !12, metadata !17), !dbg !18 25 call void @capture(ptr nonnull %vla), !dbg !19 26 ret void, !dbg !20 27} 28 29declare void @capture(ptr) 30declare void @llvm.dbg.value(metadata, metadata, metadata) 31 32!llvm.dbg.cu = !{!0} 33!llvm.module.flags = !{!3, !4} 34!llvm.ident = !{!5} 35 36!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) 37!1 = !DIFile(filename: "../llvm/1.cc", directory: "/code/build-llvm") 38!2 = !{} 39!3 = !{i32 2, !"Dwarf Version", i32 4} 40!4 = !{i32 2, !"Debug Info Version", i32 3} 41!5 = !{!"clang version 3.9.0 (trunk 272832) (llvm/trunk 272831)"} 42!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, retainedNodes: !10) 43!7 = !DISubroutineType(types: !8) 44!8 = !{null, !9} 45!9 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed) 46!10 = !{!11, !12} 47!11 = !DILocalVariable(name: "n", arg: 1, scope: !6, file: !1, line: 2, type: !9) 48 49; CHECK-DAG: ![[TYPE]] = !DILocalVariable(name: "x", 50!12 = !DILocalVariable(name: "x", scope: !6, file: !1, line: 3, type: !13) 51!13 = !DIBasicType(name: "char", size: 8, align: 8, encoding: DW_ATE_signed_char) 52!14 = !DIExpression() 53!15 = !DILocation(line: 2, column: 12, scope: !6) 54!16 = !DILocation(line: 3, column: 3, scope: !6) 55 56!17 = !DIExpression(DW_OP_deref) 57!18 = !DILocation(line: 3, column: 8, scope: !6) 58!19 = !DILocation(line: 4, column: 3, scope: !6) 59!20 = !DILocation(line: 5, column: 1, scope: !6) 60