From 8e59817ba62e63f16b0f11c7113287d75f9582ec Mon Sep 17 00:00:00 2001
From: "jianguang.li" <891528583@qq.com>
Date: Wed, 7 Apr 2021 16:19:58 +0800
Subject: [PATCH] Fix conversion fail when build with -O2 fail (#1193)

* fix conversion fail when compile with gcc -O2

* fix format check error

* fix format check error
---
 test_conformance/conversions/fplib.cpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/test_conformance/conversions/fplib.cpp b/test_conformance/conversions/fplib.cpp
index 37707b83..e739b9ae 100644
--- a/test_conformance/conversions/fplib.cpp
+++ b/test_conformance/conversions/fplib.cpp
@@ -29,8 +29,8 @@ static uint32_t clz(uint64_t value)
 
     for( num_zeros = 0; num_zeros < (sizeof(uint64_t)*8); num_zeros++)
     {
-        if(0x8000000000000000 & (value << num_zeros))
-            break;
+        volatile uint64_t v = 0x8000000000000000ull & (value << num_zeros);
+        if (v) break;
     }
     return num_zeros;
 }