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[src/trunk]: src/sys/arch/sparc64/include Put "memory" to asm inline reading ...
details: https://anonhg.NetBSD.org/src/rev/a51584eb6879
branches: trunk
changeset: 998018:a51584eb6879
user: nakayama <nakayama%NetBSD.org@localhost>
date: Fri Apr 05 12:15:41 2019 +0000
description:
Put "memory" to asm inline reading privilege registers for clang to
prevent it from being removed by excessive optimization.
diffstat:
sys/arch/sparc64/include/psl.h | 5 +++--
1 files changed, 3 insertions(+), 2 deletions(-)
diffs (20 lines):
diff -r aedf5043c2d2 -r a51584eb6879 sys/arch/sparc64/include/psl.h
--- a/sys/arch/sparc64/include/psl.h Fri Apr 05 12:11:26 2019 +0000
+++ b/sys/arch/sparc64/include/psl.h Fri Apr 05 12:15:41 2019 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: psl.h,v 1.58 2019/02/08 20:09:24 palle Exp $ */
+/* $NetBSD: psl.h,v 1.59 2019/04/05 12:15:41 nakayama Exp $ */
/*
* Copyright (c) 1992, 1993
@@ -292,8 +292,9 @@
* Put "memory" to asm inline on sun4v to avoid issuing rdpr %ver
* before checking cputyp as a result of code moving by compiler
* optimization.
+ * For clang, to prevent it from being removed by optimization.
*/
-#ifdef SUN4V
+#if defined(SUN4V) || defined(__clang__)
#define constasm_clobbers "memory"
#else
#define constasm_clobbers
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