Add codegen test for rust-lang#111508

Author: tesuji

tests/codegen/issues/issue-111508-vec-tryinto-array.rs

@@ -0,0 +1,22 @@
+//@ compile-flags: -O
+// This regress since Rust version 1.72.
+//@ min-llvm-version: 18.1.4
+
+#![crate_type = "lib"]
+
+use std::convert::TryInto;
+
+const N: usize = 24;
+
+#[no_mangle]
+// CHECK-LABEL: @example
+// CHECK-NOT: unwrap_failed
+pub fn example(a: Vec<u8>) -> u8 {
+    if a.len() != 32 {
+        return 0;
+    }
+
+    let a: [u8; 32] = a.try_into().unwrap();
+
+    a[15] + a[N]
+}