1 files changed, 83 insertions, 0 deletions
diff --git a/llvm/test/Transforms/SafeStack/debug-loc.ll b/llvm/test/Transforms/SafeStack/debug-loc.ll
new file mode 100644
index 00000000000..d157ee6e65a
--- /dev/null
+++ b/llvm/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.
+; CHECK: define void @f
+; CHECK: %[[USP:.*]] = load i8*, i8** @__safestack_unsafe_stack_ptr
+
+; dbg.declare for %buf is gone; replaced with dbg.declare based off the unsafe stack pointer
+; CHECK-NOT: @llvm.dbg.declare.*%buf
+; CHECK: call void @llvm.dbg.declare(metadata i8* %[[USP]], metadata ![[VAR:.*]], metadata ![[EXPR:.*]])
+
+; dbg.declare appears before the first use of %buf
+; CHECK: getelementptr{{.*}}%buf
+; CHECK: call{{.*}}@Capture
+; CHECK: ret void
+
+; dbg.declare describes "buf"...
+; CHECK: ![[VAR]] = !DILocalVariable(name: "buf"
+
+; ... as an offset from the unsafe stack pointer
+; CHECK: ![[EXPR]] = !DIExpression(DW_OP_deref, DW_OP_minus, 400)
+
+
+target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
+target triple = "x86_64-unknown-linux-gnu"
+
+; Function Attrs: safestack uwtable
+define void @f() #0 {
+entry:
+  %buf = alloca [100 x i32], align 16
+  %0 = bitcast [100 x i32]* %buf to i8*, !dbg !16
+  call void @llvm.lifetime.start(i64 400, i8* %0) #4, !dbg !16
+  tail call void @llvm.dbg.declare(metadata [100 x i32]* %buf, metadata !8, metadata !17), !dbg !18
+
+
+  %arraydecay = getelementptr inbounds [100 x i32], [100 x i32]* %buf, i64 0, i64 0, !dbg !19
+  call void @Capture(i32* %arraydecay), !dbg !20
+  call void @llvm.lifetime.end(i64 400, i8* %0) #4, !dbg !21
+  ret void, !dbg !21
+}
+
+; Function Attrs: nounwind argmemonly
+declare void @llvm.lifetime.start(i64, i8* nocapture) #1
+
+; Function Attrs: nounwind readnone
+declare void @llvm.dbg.declare(metadata, metadata, metadata) #2
+
+declare void @Capture(i32*) #3
+
+; Function Attrs: nounwind argmemonly
+declare void @llvm.lifetime.end(i64, i8* nocapture) #1
+
+attributes #0 = { safestack uwtable "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"="+sse,+sse2" "unsafe-fp-math"="false" "use-soft-float"="false" }
+attributes #1 = { nounwind argmemonly }
+attributes #2 = { nounwind readnone }
+attributes #3 = { "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"="+sse,+sse2" "unsafe-fp-math"="false" "use-soft-float"="false" }
+attributes #4 = { nounwind }
+
+!llvm.dbg.cu = !{!0}
+!llvm.module.flags = !{!13, !14}
+!llvm.ident = !{!15}
+
+!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, producer: "clang version 3.8.0 (trunk 248518) (llvm/trunk 248512)", isOptimized: true, runtimeVersion: 0, emissionKind: 1, enums: !2, subprograms: !3)
+!1 = !DIFile(filename: "1.cc", directory: "/tmp")
+!2 = !{}
+!3 = !{!4}
+!4 = distinct !DISubprogram(name: "f", scope: !1, file: !1, line: 4, type: !5, isLocal: false, isDefinition: true, scopeLine: 4, flags: DIFlagPrototyped, isOptimized: true, function: void ()* @f, variables: !7)
+!5 = !DISubroutineType(types: !6)
+!6 = !{null}
+!7 = !{!8}
+!8 = !DILocalVariable(name: "buf", scope: !4, file: !1, line: 5, type: !9)
+!9 = !DICompositeType(tag: DW_TAG_array_type, baseType: !10, size: 3200, align: 32, elements: !11)
+!10 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
+!11 = !{!12}
+!12 = !DISubrange(count: 100)
+!13 = !{i32 2, !"Dwarf Version", i32 4}
+!14 = !{i32 2, !"Debug Info Version", i32 3}
+!15 = !{!"clang version 3.8.0 (trunk 248518) (llvm/trunk 248512)"}
+!16 = !DILocation(line: 5, column: 3, scope: !4)
+!17 = !DIExpression()
+!18 = !DILocation(line: 5, column: 7, scope: !4)
+!19 = !DILocation(line: 6, column: 11, scope: !4)
+!20 = !DILocation(line: 6, column: 3, scope: !4)
+!21 = !DILocation(line: 7, column: 1, scope: !4)