From: Uros Bizjak <ubizjak@gmail.com>
Date: Fri, 24 Jul 2020 13:59:38 +0000 (+0200)
Subject: i386: Emit mfence_sse2 for -Os [PR95750]
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c065b094711750d5757fa6687c1525d6051d6009;p=thirdparty%2Fgcc.git

i386: Emit mfence_sse2 for -Os [PR95750]

2020-07-24  Uroš Bizjak  <ubizjak@gmail.com>

gcc/ChangeLog:
	PR target/95750
	* config/i386/sync.md (mmem_thread_fence): Emit mfence_sse2 for -Os.
---

diff --git a/gcc/config/i386/sync.md b/gcc/config/i386/sync.md
index c88750d36641..ed17bb00205b 100644
--- a/gcc/config/i386/sync.md
+++ b/gcc/config/i386/sync.md
@@ -123,7 +123,8 @@
       rtx mem;
 
       if ((TARGET_64BIT || TARGET_SSE2)
-	  && !TARGET_AVOID_MFENCE)
+	  && (optimize_function_for_size_p (cfun)
+	      || !TARGET_AVOID_MFENCE))
 	mfence_insn = gen_mfence_sse2;
       else
 	mfence_insn = gen_mfence_nosse;