codegen_llvm: set DW_AT_accessibility

Sets the accessibility of types and fields in DWARF using
`DW_AT_accessibility` attribute.

`DW_AT_accessibility` (public/protected/private) isn't exactly right for
Rust,  but neither is `DW_AT_visibility` (local/exported/qualified), and
there's no way to set `DW_AT_visbility` in LLVM's API.

Signed-off-by: David Wood <david@davidtw.co>

1 files changed, 19 insertions, 0 deletions

diff --git a/tests/codegen/debug-accessibility/public-enum.rs b/tests/codegen/debug-accessibility/public-enum.rs
new file mode 100644
index 00000000000..b2fe87b8ad8
--- /dev/null
+++ b/tests/codegen/debug-accessibility/public-enum.rs
@@ -0,0 +1,19 @@
+// compile-flags: -C debuginfo=2
+
+#![allow(dead_code)]
+
+// Checks that visibility information is present in the debuginfo for types and their fields.
+
+use std::hint::black_box;
+
+pub enum PublicFooEnum {
+    A,
+    B(u32),
+    C { x: u32 },
+}
+
+// CHECK: {{!.*}} = !DICompositeType(tag: DW_TAG_structure_type, name: "PublicFooEnum"{{.*}}flags: DIFlagPublic{{.*}})
+
+fn main() {
+    black_box(PublicFooEnum::A);
+}