1 files changed, 83 insertions, 0 deletions
diff --git a/test/Transforms/SafeStack/debug-loc.ll b/test/Transforms/SafeStack/debug-loc.ll
new file mode 100644
index 000000000000..e72d0e9d2ff2
--- /dev/null
+++ b/test/Transforms/SafeStack/debug-loc.ll
@@ -0,0 +1,83 @@
+; RUN: opt -safe-stack -S -mtriple=i386-pc-linux-gnu < %s -o - | FileCheck %s
+
+; Test debug location for the local variables moved onto the unsafe stack.
+
+target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
+target triple = "x86_64-unknown-linux-gnu"
+
+%struct.S = type { [100 x i8] }
+
+; Function Attrs: safestack uwtable
+define void @f(%struct.S* byval align 8 %zzz) #0 !dbg !12 {
+; CHECK: define void @f
+
+entry:
+; CHECK: %[[USP:.*]] = load i8*, i8** @__safestack_unsafe_stack_ptr
+
+  %xxx = alloca %struct.S, align 1
+  call void @llvm.dbg.declare(metadata %struct.S* %zzz, metadata !18, metadata !19), !dbg !20
+  call void @llvm.dbg.declare(metadata %struct.S* %xxx, metadata !21, metadata !19), !dbg !22
+
+; dbg.declare for %zzz and %xxx are gone; replaced with dbg.declare based off the unsafe stack pointer
+; CHECK-NOT: call void @llvm.dbg.declare
+; CHECK: call void @llvm.dbg.declare(metadata i8* %[[USP]], metadata ![[VAR_ARG:.*]], metadata ![[EXPR_ARG:.*]])
+; CHECK-NOT: call void @llvm.dbg.declare
+; CHECK: call void @llvm.dbg.declare(metadata i8* %[[USP]], metadata ![[VAR_LOCAL:.*]], metadata ![[EXPR_LOCAL:.*]])
+; CHECK-NOT: call void @llvm.dbg.declare
+
+  call void @Capture(%struct.S* %zzz), !dbg !23
+  call void @Capture(%struct.S* %xxx), !dbg !24
+
+; dbg.declare appears before the first use
+; CHECK:   call void @Capture
+; CHECK:   call void @Capture
+
+  ret void, !dbg !25
+}
+
+; CHECK-DAG: ![[VAR_ARG]] = !DILocalVariable(name: "zzz"
+; 100 aligned up to 8
+; CHECK-DAG: ![[EXPR_ARG]] = !DIExpression(DW_OP_deref, DW_OP_minus, 104
+
+; CHECK-DAG: ![[VAR_LOCAL]] = !DILocalVariable(name: "xxx"
+; CHECK-DAG: ![[EXPR_LOCAL]] = !DIExpression(DW_OP_deref, DW_OP_minus, 208
+
+; Function Attrs: nounwind readnone
+declare void @llvm.dbg.declare(metadata, metadata, metadata) #1
+
+declare void @Capture(%struct.S*) #2
+
+attributes #0 = { safestack uwtable "disable-tail-calls"="false" "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "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" "unsafe-fp-math"="false" "use-soft-float"="false" }
+attributes #1 = { nounwind readnone }
+attributes #2 = { "disable-tail-calls"="false" "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "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" "unsafe-fp-math"="false" "use-soft-float"="false" }
+
+!llvm.dbg.cu = !{!0}
+!llvm.module.flags = !{!15, !16}
+!llvm.ident = !{!17}
+
+!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, producer: "clang version 3.8.0 (trunk 254019) (llvm/trunk 254036)", isOptimized: false, runtimeVersion: 0, emissionKind: 1, enums: !2, retainedTypes: !3, subprograms: !11)
+!1 = !DIFile(filename: "../llvm/2.cc", directory: "/code/build-llvm")
+!2 = !{}
+!3 = !{!4}
+!4 = !DICompositeType(tag: DW_TAG_structure_type, name: "S", file: !1, line: 4, size: 800, align: 8, elements: !5, identifier: "_ZTS1S")
+!5 = !{!6}
+!6 = !DIDerivedType(tag: DW_TAG_member, name: "a", scope: !"_ZTS1S", file: !1, line: 5, baseType: !7, size: 800, align: 8)
+!7 = !DICompositeType(tag: DW_TAG_array_type, baseType: !8, size: 800, align: 8, elements: !9)
+!8 = !DIBasicType(name: "char", size: 8, align: 8, encoding: DW_ATE_signed_char)
+!9 = !{!10}
+!10 = !DISubrange(count: 100)
+!11 = !{!12}
+!12 = distinct !DISubprogram(name: "f", linkageName: "_Z1f1S", scope: !1, file: !1, line: 10, type: !13, isLocal: false, isDefinition: true, scopeLine: 10, flags: DIFlagPrototyped, isOptimized: false, variables: !2)
+!13 = !DISubroutineType(types: !14)
+!14 = !{null, !"_ZTS1S"}
+!15 = !{i32 2, !"Dwarf Version", i32 4}
+!16 = !{i32 2, !"Debug Info Version", i32 3}
+!17 = !{!"clang version 3.8.0 (trunk 254019) (llvm/trunk 254036)"}
+!18 = !DILocalVariable(name: "zzz", arg: 1, scope: !12, file: !1, line: 10, type: !"_ZTS1S")
+!19 = !DIExpression()
+!20 = !DILocation(line: 10, column: 10, scope: !12)
+!21 = !DILocalVariable(name: "xxx", scope: !12, file: !1, line: 11, type: !"_ZTS1S")
+!22 = !DILocation(line: 11, column: 5, scope: !12)
+!23 = !DILocation(line: 12, column: 3, scope: !12)
+!24 = !DILocation(line: 13, column: 3, scope: !12)
+!25 = !DILocation(line: 14, column: 1, scope: !12)