1 files changed, 98 insertions, 0 deletions
diff --git a/test/Transforms/SafeStack/debug-loc2.ll b/test/Transforms/SafeStack/debug-loc2.ll
new file mode 100644
index 0000000000000..35e9b7711d2f7
--- /dev/null
+++ b/test/Transforms/SafeStack/debug-loc2.ll
@@ -0,0 +1,98 @@
+; RUN: opt -safe-stack -S -mtriple=i386-pc-linux-gnu < %s -o - | FileCheck %s
+
+; Test llvm.dbg.value for the local variables moved onto the unsafe stack.
+; SafeStack rewrites them relative to the unsafe stack pointer (base address of
+; the unsafe stack frame).
+
+target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
+target triple = "x86_64-unknown-linux-gnu"
+
+; Function Attrs: noinline safestack uwtable
+define void @f() #0 !dbg !6 {
+entry:
+; CHECK:   %[[USP:.*]] = load i8*, i8** @__safestack_unsafe_stack_ptr
+  %x1 = alloca i32, align 4
+  %x2 = alloca i32, align 4
+  %0 = bitcast i32* %x1 to i8*, !dbg !13
+  %1 = bitcast i32* %x2 to i8*, !dbg !14
+
+; Unhandled dbg.value: expression does not start with OP_DW_deref
+; CHECK: call void @llvm.dbg.value(metadata ![[EMPTY:.*]], i64 0, metadata !{{.*}}, metadata !{{.*}})
+  tail call void @llvm.dbg.value(metadata i32* %x1, i64 0, metadata !10, metadata !23), !dbg !16
+
+; Unhandled dbg.value: expression does not start with OP_DW_deref
+; CHECK: call void @llvm.dbg.value(metadata ![[EMPTY]], i64 0, metadata !{{.*}}, metadata !{{.*}})
+  tail call void @llvm.dbg.value(metadata i32* %x1, i64 0, metadata !10, metadata !24), !dbg !16
+
+; Supported dbg.value: rewritted based on the [[USP]] value.
+; CHECK: call void @llvm.dbg.value(metadata i8* %[[USP]], i64 0, metadata ![[X1:.*]], metadata ![[X1_EXPR:.*]])
+  tail call void @llvm.dbg.value(metadata i32* %x1, i64 0, metadata !10, metadata !15), !dbg !16
+  call void @capture(i32* nonnull %x1), !dbg !17
+
+; An extra non-dbg.value metadata use of %x2. Replaced with an empty metadata.
+; CHECK: call void @llvm.random.metadata.use(metadata ![[EMPTY]])
+  call void @llvm.random.metadata.use(metadata i32* %x2)
+
+; CHECK: call void @llvm.dbg.value(metadata i8* %[[USP]], i64 0, metadata ![[X2:.*]], metadata ![[X2_EXPR:.*]])
+  call void @llvm.dbg.value(metadata i32* %x2, i64 0, metadata !12, metadata !15), !dbg !18
+  call void @capture(i32* nonnull %x2), !dbg !19
+  ret void, !dbg !20
+}
+
+; Function Attrs: argmemonly nounwind
+declare void @llvm.lifetime.start(i64, i8* nocapture) #1
+
+declare void @capture(i32*) #2
+
+; Function Attrs: argmemonly nounwind
+declare void @llvm.lifetime.end(i64, i8* nocapture) #1
+
+; Function Attrs: nounwind readnone
+declare void @llvm.dbg.value(metadata, i64, metadata, metadata) #3
+
+declare void @llvm.random.metadata.use(metadata)
+
+attributes #0 = { noinline safestack uwtable "disable-tail-calls"="false" "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "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" }
+attributes #1 = { argmemonly nounwind }
+attributes #2 = { "disable-tail-calls"="false" "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "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" }
+attributes #3 = { nounwind readnone }
+attributes #4 = { nounwind }
+
+!llvm.dbg.cu = !{!0}
+!llvm.module.flags = !{!3, !4}
+!llvm.ident = !{!5}
+
+!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)
+!1 = !DIFile(filename: "../llvm/2.cc", directory: "/code/build-llvm")
+
+; CHECK-DAG: ![[EMPTY]] = !{}
+!2 = !{}
+!3 = !{i32 2, !"Dwarf Version", i32 4}
+!4 = !{i32 2, !"Debug Info Version", i32 3}
+!5 = !{!"clang version 3.9.0 (trunk 271022) (llvm/trunk 271027)"}
+!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, variables: !9)
+!7 = !DISubroutineType(types: !8)
+!8 = !{null}
+!9 = !{!10, !12}
+
+; CHECK-DAG: ![[X1]] = !DILocalVariable(name: "x1",
+!10 = !DILocalVariable(name: "x1", scope: !6, file: !1, line: 5, type: !11)
+!11 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
+
+; CHECK-DAG: ![[X2]] = !DILocalVariable(name: "x2",
+!12 = !DILocalVariable(name: "x2", scope: !6, file: !1, line: 6, type: !11)
+!13 = !DILocation(line: 5, column: 3, scope: !6)
+!14 = !DILocation(line: 6, column: 3, scope: !6)
+
+; CHECK-DAG: ![[X1_EXPR]] = !DIExpression(DW_OP_deref, DW_OP_minus, 4)
+; CHECK-DAG: ![[X2_EXPR]] = !DIExpression(DW_OP_deref, DW_OP_minus, 8)
+!15 = !DIExpression(DW_OP_deref)
+!16 = !DILocation(line: 5, column: 7, scope: !6)
+!17 = !DILocation(line: 8, column: 3, scope: !6)
+!18 = !DILocation(line: 6, column: 7, scope: !6)
+!19 = !DILocation(line: 9, column: 3, scope: !6)
+!20 = !DILocation(line: 10, column: 1, scope: !6)
+!21 = !DILocation(line: 10, column: 1, scope: !22)
+!22 = !DILexicalBlockFile(scope: !6, file: !1, discriminator: 1)
+!23 = !DIExpression()
+!24 = !DIExpression(DW_OP_minus, 42)