Rollup merge of #101180 - SUPERCILEX:const-maybeuninit, r=TaKO8Ki

Add another MaybeUninit array test with const

This is another possible syntax and I just want to be absolutely sure it behaves correctly.

src/test/codegen/issue-96274.rs

@@ -2,6 +2,7 @@
 // compile-flags: -O
 
 #![crate_type = "lib"]
+#![feature(inline_const)]
 
 use std::mem::MaybeUninit;
 
@@ -9,3 +10,8 @@ pub fn maybe_uninit() -> [MaybeUninit<u8>; 3000] {
     // CHECK-NOT: memset
     [MaybeUninit::uninit(); 3000]
 }
+
+pub fn maybe_uninit_const<T>() -> [MaybeUninit<T>; 8192] {
+    // CHECK-NOT: memset
+    [const { MaybeUninit::uninit() }; 8192]
+}