From: Aaron Sawdey <acsawdey@linux.ibm.com>
Date: Thu, 29 Nov 2018 03:56:14 +0000 (+0000)
Subject: rs6000-string.c (expand_block_clear): Change how we determine if unaligned vsx is ok.
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=645eee7431fef4cc37c5307a6c6f81fcc6c553d4;p=gcc.git

rs6000-string.c (expand_block_clear): Change how we determine if unaligned vsx is ok.

2018-11-28  Aaron Sawdey  <acsawdey@linux.ibm.com>

	* config/rs6000/rs6000-string.c (expand_block_clear): Change how
	we determine if unaligned vsx is ok.

From-SVN: r266599
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 6607cd7c710..98f4f3fe3a8 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+2018-11-28  Aaron Sawdey  <acsawdey@linux.ibm.com>
+
+	* config/rs6000/rs6000-string.c (expand_block_clear): Change how
+	we determine if unaligned vsx is ok.
+
 2018-11-28  Jan Hubicka  <jh@suse.cz>
 
 	* predict.c (determine_unlikely_bbs): Forward declare; also determine
diff --git a/gcc/config/rs6000/rs6000-string.c b/gcc/config/rs6000/rs6000-string.c
index 620be2b7325..bc5bec2045e 100644
--- a/gcc/config/rs6000/rs6000-string.c
+++ b/gcc/config/rs6000/rs6000-string.c
@@ -85,14 +85,15 @@ expand_block_clear (rtx operands[])
   if (! optimize_size && bytes > 8 * clear_step)
     return 0;
 
+  bool unaligned_vsx_ok = (bytes >= 32 && TARGET_EFFICIENT_UNALIGNED_VSX);
+
   for (offset = 0; bytes > 0; offset += clear_bytes, bytes -= clear_bytes)
     {
       machine_mode mode = BLKmode;
       rtx dest;
 
       if (TARGET_ALTIVEC
-	  && ((bytes >= 16 && align >= 128)
-	      || (bytes >= 32 && TARGET_EFFICIENT_UNALIGNED_VSX)))
+	  && (bytes >= 16 && (align >= 128 || unaligned_vsx_ok)))
 	{
 	  clear_bytes = 16;
 	  mode = V4SImode;