Add test case for taking the address of array literal elements (#16785)

compiler/test/runnable/nogc.d

@@ -68,12 +68,37 @@ void test12936() @nogc
 
 /***********************/
 
+version(none) // Pending future enhancements:
+void testIndexedArrayLiteral() @nogc
+{
+    int i = 2;
+    int x = [10, 20, 30, 40][i];
+    assert(x == 30);
+
+    enum arr = [100, 200, 300, 400][1 .. $];
+	assert(arr[i] == 400);
+}
+
+void testArrayLiteralLvalue()
+{
+    // https://github.com/dlang/dmd/pull/16784
+    // Test that this array literal is *not* put on the stack because
+    // it gets its address taken
+    static int* getPtr(int i) => &[1, 2, 3][i];
+    int* x = getPtr(1);
+    int* y = getPtr(1);
+    assert(x != y);
+}
+
+/***********************/
+
 int main()
 {
     test1();
     test3032();
     test12642();
     test12936();
+    testArrayLiteralLvalue();
 
     printf("Success\n");
     return 0;