From e21c23c3e9f0696f3df406060db045b4dfe43250 Mon Sep 17 00:00:00 2001
From: Rong Bao <rong.bao@csmantle.top>
Date: Fri, 13 Feb 2026 19:09:49 +0800
Subject: [PATCH] Prevent dhrystone Run_Index from being optimized away

---
 UnixBench/src/dhry_1.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/UnixBench/src/dhry_1.c b/UnixBench/src/dhry_1.c
index 673481f..1fa1e26 100644
--- a/UnixBench/src/dhry_1.c
+++ b/UnixBench/src/dhry_1.c
@@ -40,7 +40,7 @@ char SCCSid[] = "@(#) @(#)dhry_1.c:3.4 -- 5/15/91 19:30:21";
 #include "dhry.h"
 #include "timeit.c"
 
-unsigned long Run_Index;
+volatile unsigned long Run_Index;
 
 void report()
 {