From 152241f26c821f1ab6c72e01b9c3334df451b8e1 Mon Sep 17 00:00:00 2001
From: Oliver Schmidt <ol.sc@web.de>
Date: Sun, 19 Dec 2021 16:44:37 +0100
Subject: [PATCH] Don't rely on (actually changed) unspecified compiler
 behavior.

---
 libsrc/common/pmemalign.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libsrc/common/pmemalign.c b/libsrc/common/pmemalign.c
index 8f055a3fc..d9d6b4e97 100644
--- a/libsrc/common/pmemalign.c
+++ b/libsrc/common/pmemalign.c
@@ -75,7 +75,7 @@ int __fastcall__ posix_memalign (void** memptr, size_t alignment, size_t size)
     }
 
     /* Test alignment: is it a power of two? There must be only one bit set. */
-    if (alignment == 0 || (alignment & --alignment) != 0) {
+    if (alignment == 0 || (alignment & alignment - 1) != 0) {
         *memptr = NULL;
         return EINVAL;
     }