From: Markus Scherer <markus.icu@gmail.com>
Date: Mon, 6 Mar 2017 22:47:58 +0000 (+0000)
Subject: ICU-12992 new version of the aliasing barrier
X-Git-Tag: release-59-rc~119^2~6
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=85e291a4ec2ec49ce34b892c13d679a2c44bc9f9;p=icu

ICU-12992 new version of the aliasing barrier

X-SVN-Rev: 39739
---

diff --git a/icu4c/source/common/unicode/char16ptr.h b/icu4c/source/common/unicode/char16ptr.h
index 780a1502738..d484cfdf8ac 100644
--- a/icu4c/source/common/unicode/char16ptr.h
+++ b/icu4c/source/common/unicode/char16ptr.h
@@ -25,8 +25,8 @@ U_NAMESPACE_BEGIN
  */
 #ifdef U_ALIASING_BARRIER
     // Use the predefined value.
-#elif 0 // TODO: only some versions of clang?? defined(__clang__) || defined(__GNUC__)
-#   define U_ALIASING_BARRIER(ptr) asm volatile("" : "+rm"(ptr))
+#elif defined(__clang__) || defined(__GNUC__)
+#   define U_ALIASING_BARRIER(ptr) asm volatile("" : : "rm"(ptr) : "memory")
 #endif
 
 /**