3 files changed, 43 insertions, 0 deletions
diff --git a/tests/codegen/avr/avr-func-addrspace.rs b/tests/codegen/avr/avr-func-addrspace.rs
index e9740e30da4..bc11e108124 100644
--- a/tests/codegen/avr/avr-func-addrspace.rs
+++ b/tests/codegen/avr/avr-func-addrspace.rs
@@ -109,3 +109,28 @@ pub unsafe fn transmute_fn_ptr_to_data(x: fn()) -> *const () {
     // as long as it doesn't cause a verifier error by using `bitcast`.
     transmute(x)
 }
+
+pub enum Either<T, U> { A(T), B(U) }
+
+// Previously, we would codegen this as passing/returning a scalar pair of `{ i8, ptr }`,
+// with the `ptr` field representing both `&i32` and `fn()` depending on the variant.
+// This is incorrect, because `fn()` should be `ptr addrspace(1)`, not `ptr`.
+
+// CHECK: define{{.+}}void @should_not_combine_addrspace({{.+\*|ptr}}{{.+}}sret{{.+}}%0, {{.+\*|ptr}}{{.+}}%x)
+#[no_mangle]
+#[inline(never)]
+pub fn should_not_combine_addrspace(x: Either<&i32, fn()>) -> Either<&i32, fn()> {
+    x
+}
+
+// The incorrectness described above would result in us producing (after optimizations)
+// a `ptrtoint`/`inttoptr` roundtrip to convert from `ptr` to `ptr addrspace(1)`.
+
+// CHECK-LABEL: @call_with_fn_ptr
+#[no_mangle]
+pub fn call_with_fn_ptr<'a>(f: fn()) -> Either<&'a i32, fn()> {
+    // CHECK-NOT: ptrtoint
+    // CHECK-NOT: inttoptr
+    // CHECK: call addrspace(1) void @should_not_combine_addrspace
+    should_not_combine_addrspace(Either::B(f))
+}
diff --git a/tests/codegen/debug-vtable.rs b/tests/codegen/debug-vtable.rs
index bdd312878ec..d82b737de0b 100644
--- a/tests/codegen/debug-vtable.rs
+++ b/tests/codegen/debug-vtable.rs
@@ -9,6 +9,14 @@
 // compile-flags: -Cdebuginfo=2 -Copt-level=0 -Csymbol-mangling-version=v0
 // ignore-tidy-linelength
 
+// Make sure that vtables don't have the unnamed_addr attribute when debuginfo is enabled.
+// This helps debuggers more reliably map from dyn pointer to concrete type.
+// CHECK: @vtable.0 = private constant <{
+// CHECK: @vtable.1 = private constant <{
+// CHECK: @vtable.2 = private constant <{
+// CHECK: @vtable.3 = private constant <{
+// CHECK: @vtable.4 = private constant <{
+
 // NONMSVC: ![[USIZE:[0-9]+]] = !DIBasicType(name: "usize"
 // MSVC: ![[USIZE:[0-9]+]] = !DIDerivedType(tag: DW_TAG_typedef, name: "usize"
 // NONMSVC: ![[PTR:[0-9]+]] = !DIDerivedType(tag: DW_TAG_pointer_type, name: "*const ()"
diff --git a/tests/codegen/option-nonzero-eq.rs b/tests/codegen/option-nonzero-eq.rs
index 598dcc19b49..835decd3e5f 100644
--- a/tests/codegen/option-nonzero-eq.rs
+++ b/tests/codegen/option-nonzero-eq.rs
@@ -3,6 +3,7 @@
 #![crate_type = "lib"]
 
 extern crate core;
+use core::cmp::Ordering;
 use core::num::{NonZeroU32, NonZeroI64};
 use core::ptr::NonNull;
 
@@ -32,3 +33,12 @@ pub fn non_null_eq(l: Option<NonNull<u8>>, r: Option<NonNull<u8>>) -> bool {
     // CHECK-NEXT: ret i1
     l == r
 }
+
+// CHECK-lABEL: @ordering_eq
+#[no_mangle]
+pub fn ordering_eq(l: Option<Ordering>, r: Option<Ordering>) -> bool {
+    // CHECK: start:
+    // CHECK-NEXT: icmp eq i8
+    // CHECK-NEXT: ret i1
+    l == r
+}