| Evgeniy Stepanov | 72d961a | 2016-06-16 22:34:00 +0000 | [diff] [blame] | 1 | ; RUN: opt -safe-stack -S -mtriple=i386-pc-linux-gnu < %s -o - | FileCheck %s |
| 2 | |
| 3 | ; Test llvm.dbg.value for dynamic allocas moved onto the unsafe stack. |
| 4 | ; In the dynamic alloca case, the dbg.value does not change with the exception |
| 5 | ; of the alloca pointer in the first argument being replaced with the new stack |
| 6 | ; top address. |
| 7 | |
| 8 | target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128" |
| 9 | target triple = "x86_64-unknown-linux-gnu" |
| 10 | |
| 11 | define void @f(i32 %n) safestack !dbg !6 { |
| 12 | entry: |
| 13 | tail call void @llvm.dbg.value(metadata i32 %n, i64 0, metadata !11, metadata !14), !dbg !15 |
| 14 | %0 = zext i32 %n to i64, !dbg !16 |
| 15 | |
| 16 | ; CHECK: store i8* %[[VLA:.*]], i8** @__safestack_unsafe_stack_ptr |
| 17 | ; CHECK: tail call void @llvm.dbg.value(metadata i8* %[[VLA]], i64 0, metadata ![[TYPE:.*]], metadata ![[EXPR:.*]]) |
| 18 | ; CHECK: call void @capture({{.*}} %[[VLA]]) |
| 19 | |
| 20 | %vla = alloca i8, i64 %0, align 16, !dbg !16 |
| 21 | tail call void @llvm.dbg.value(metadata i8* %vla, i64 0, metadata !12, metadata !17), !dbg !18 |
| 22 | call void @capture(i8* nonnull %vla), !dbg !19 |
| 23 | ret void, !dbg !20 |
| 24 | } |
| 25 | |
| 26 | declare void @capture(i8*) |
| 27 | declare void @llvm.dbg.value(metadata, i64, metadata, metadata) |
| 28 | |
| 29 | !llvm.dbg.cu = !{!0} |
| 30 | !llvm.module.flags = !{!3, !4} |
| 31 | !llvm.ident = !{!5} |
| 32 | |
| 33 | !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) |
| 34 | !1 = !DIFile(filename: "../llvm/1.cc", directory: "/code/build-llvm") |
| 35 | !2 = !{} |
| 36 | !3 = !{i32 2, !"Dwarf Version", i32 4} |
| 37 | !4 = !{i32 2, !"Debug Info Version", i32 3} |
| 38 | !5 = !{!"clang version 3.9.0 (trunk 272832) (llvm/trunk 272831)"} |
| 39 | !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) |
| 40 | !7 = !DISubroutineType(types: !8) |
| 41 | !8 = !{null, !9} |
| 42 | !9 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed) |
| 43 | !10 = !{!11, !12} |
| 44 | !11 = !DILocalVariable(name: "n", arg: 1, scope: !6, file: !1, line: 2, type: !9) |
| 45 | |
| 46 | ; CHECK-DAG: ![[TYPE]] = !DILocalVariable(name: "x", |
| 47 | !12 = !DILocalVariable(name: "x", scope: !6, file: !1, line: 3, type: !13) |
| 48 | !13 = !DIBasicType(name: "char", size: 8, align: 8, encoding: DW_ATE_signed_char) |
| 49 | !14 = !DIExpression() |
| 50 | !15 = !DILocation(line: 2, column: 12, scope: !6) |
| 51 | !16 = !DILocation(line: 3, column: 3, scope: !6) |
| 52 | |
| 53 | ; CHECK-DAG: ![[EXPR]] = !DIExpression(DW_OP_deref) |
| 54 | !17 = !DIExpression(DW_OP_deref) |
| 55 | !18 = !DILocation(line: 3, column: 8, scope: !6) |
| 56 | !19 = !DILocation(line: 4, column: 3, scope: !6) |
| 57 | !20 = !DILocation(line: 5, column: 1, scope: !6) |