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
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
11 target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
12 target triple = "x86_64-unknown-linux-gnu"
14 define void @f(i32 %n) safestack !dbg !6 {
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
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]])
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
29 declare void @capture(ptr)
30 declare void @llvm.dbg.value(metadata, metadata, metadata)
33 !llvm.module.flags = !{!3, !4}
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")
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)
45 !9 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
47 !11 = !DILocalVariable(name: "n", arg: 1, scope: !6, file: !1, line: 2, type: !9)
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)
53 !15 = !DILocation(line: 2, column: 12, scope: !6)
54 !16 = !DILocation(line: 3, column: 3, scope: !6)
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)