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 the local variables moved onto the unsafe stack.
7 ; SafeStack rewrites them relative to the unsafe stack pointer (base address of
8 ; the unsafe stack frame).
10 target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
11 target triple = "x86_64-unknown-linux-gnu"
13 ; Function Attrs: noinline safestack uwtable
14 define void @f() #0 !dbg !6 {
16 ; CHECK: %[[USP:.*]] = load ptr, ptr @__safestack_unsafe_stack_ptr
17 %x1 = alloca i32, align 4
18 %x2 = alloca i32, align 4
20 ; Unhandled dbg.value: expression does not start with OP_DW_deref
21 ; CHECK: call void @llvm.dbg.value(metadata ptr undef, metadata !{{.*}}, metadata !{{.*}})
22 tail call void @llvm.dbg.value(metadata ptr %x1, metadata !10, metadata !23), !dbg !16
24 ; Unhandled dbg.value: expression does not start with OP_DW_deref
25 ; CHECK: call void @llvm.dbg.value(metadata ptr undef, metadata !{{.*}}, metadata !{{.*}})
26 tail call void @llvm.dbg.value(metadata ptr %x1, metadata !10, metadata !24), !dbg !16
28 ; Supported dbg.value: rewritted based on the [[USP]] value.
29 ; CHECK: call void @llvm.dbg.value(metadata ptr %[[USP]], metadata ![[X1:.*]], metadata !DIExpression(DW_OP_constu, 4, DW_OP_minus, DW_OP_deref, DW_OP_LLVM_fragment, 0, 4))
30 tail call void @llvm.dbg.value(metadata ptr %x1, metadata !10, metadata !25), !dbg !16
32 ; Supported dbg.value: rewritted based on the [[USP]] value.
33 ; CHECK: call void @llvm.dbg.value(metadata ptr %[[USP]], metadata ![[X1:.*]], metadata !DIExpression(DW_OP_constu, 4, DW_OP_minus, DW_OP_deref))
34 tail call void @llvm.dbg.value(metadata ptr %x1, metadata !10, metadata !15), !dbg !16
35 call void @capture(ptr nonnull %x1), !dbg !17
37 ; An extra non-dbg.value metadata use of %x2. Replaced with undef.
38 ; CHECK: call void @llvm.random.metadata.use(metadata ptr undef
39 call void @llvm.random.metadata.use(metadata ptr %x2)
41 ; CHECK: call void @llvm.dbg.value(metadata ptr %[[USP]], metadata ![[X2:.*]], metadata !DIExpression(DW_OP_constu, 8, DW_OP_minus, DW_OP_deref))
42 call void @llvm.dbg.value(metadata ptr %x2, metadata !12, metadata !15), !dbg !18
43 call void @capture(ptr nonnull %x2), !dbg !19
47 ; Function Attrs: argmemonly nounwind
48 declare void @llvm.lifetime.start.p0(i64, ptr nocapture) #1
50 declare void @capture(ptr) #2
52 ; Function Attrs: argmemonly nounwind
53 declare void @llvm.lifetime.end.p0(i64, ptr nocapture) #1
55 ; Function Attrs: nounwind readnone
56 declare void @llvm.dbg.value(metadata, metadata, metadata) #3
58 declare void @llvm.random.metadata.use(metadata)
60 attributes #0 = { noinline safestack uwtable "disable-tail-calls"="false" "less-precise-fpmad"="false" "frame-pointer"="none" "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" }
61 attributes #1 = { argmemonly nounwind }
62 attributes #2 = { "disable-tail-calls"="false" "less-precise-fpmad"="false" "frame-pointer"="none" "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" }
63 attributes #3 = { nounwind readnone }
64 attributes #4 = { nounwind }
67 !llvm.module.flags = !{!3, !4}
70 !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)
71 !1 = !DIFile(filename: "../llvm/2.cc", directory: "/code/build-llvm")
74 !3 = !{i32 2, !"Dwarf Version", i32 4}
75 !4 = !{i32 2, !"Debug Info Version", i32 3}
76 !5 = !{!"clang version 3.9.0 (trunk 271022) (llvm/trunk 271027)"}
77 !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)
78 !7 = !DISubroutineType(types: !8)
82 ; CHECK-DAG: ![[X1]] = !DILocalVariable(name: "x1",
83 !10 = !DILocalVariable(name: "x1", scope: !6, file: !1, line: 5, type: !11)
84 !11 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
86 ; CHECK-DAG: ![[X2]] = !DILocalVariable(name: "x2",
87 !12 = !DILocalVariable(name: "x2", scope: !6, file: !1, line: 6, type: !11)
88 !13 = !DILocation(line: 5, column: 3, scope: !6)
89 !14 = !DILocation(line: 6, column: 3, scope: !6)
91 !15 = !DIExpression(DW_OP_deref)
92 !16 = !DILocation(line: 5, column: 7, scope: !6)
93 !17 = !DILocation(line: 8, column: 3, scope: !6)
94 !18 = !DILocation(line: 6, column: 7, scope: !6)
95 !19 = !DILocation(line: 9, column: 3, scope: !6)
96 !20 = !DILocation(line: 10, column: 1, scope: !6)
97 !21 = !DILocation(line: 10, column: 1, scope: !22)
98 !22 = !DILexicalBlockFile(scope: !6, file: !1, discriminator: 1)
100 !24 = !DIExpression(DW_OP_constu, 42, DW_OP_minus)
101 !25 = !DIExpression(DW_OP_deref, DW_OP_LLVM_fragment, 0, 4)