1 files changed, 18 insertions, 0 deletions
diff --git a/tests/codegen-llvm/slice-pointer-nonnull-unwrap.rs b/tests/codegen-llvm/slice-pointer-nonnull-unwrap.rs
new file mode 100644
index 00000000000..35e4bf2c661
--- /dev/null
+++ b/tests/codegen-llvm/slice-pointer-nonnull-unwrap.rs
@@ -0,0 +1,18 @@
+//@ compile-flags: -Copt-level=3
+#![crate_type = "lib"]
+
+use std::ptr::NonNull;
+
+// CHECK-LABEL: @slice_ptr_len_1
+// CHECK-NEXT: {{.*}}:
+// CHECK-NEXT: ret {{i(32|64)}} %ptr.1
+#[no_mangle]
+pub fn slice_ptr_len_1(ptr: *const [u8]) -> usize {
+    let ptr = ptr.cast_mut();
+    if let Some(ptr) = NonNull::new(ptr) {
+        ptr.len()
+    } else {
+        // We know ptr is null, so we know ptr.wrapping_byte_add(1) is not null.
+        NonNull::new(ptr.wrapping_byte_add(1)).unwrap().len()
+    }
+}