From: linkw <linkw@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Fri, 11 Oct 2019 06:01:30 +0000 (+0000)
Subject: 2019-10-11  Kewen Lin  <linkw@gcc.gnu.org>
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=43c3467f12d54c1daf1b7591eff5f4255f1dee8d;p=thirdparty%2Fgcc.git

2019-10-11  Kewen Lin  <linkw@gcc.gnu.org>

    * config/rs6000/rs6000.c (rs6000_builtin_vectorization_cost): Lower
    vec_promote_demote cost to 1 for non-Power7 VSX architectures.



git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@276859 138bc75d-0d04-0410-961f-82ee72b054a4
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 3d9af72764ab..df124f077118 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+2019-10-11  Kewen Lin  <linkw@gcc.gnu.org>
+
+	* config/rs6000/rs6000.c (rs6000_builtin_vectorization_cost): Lower
+	vec_promote_demote cost to 1 for non-Power7 VSX architectures.
+
 2019-10-10  Joseph Myers  <joseph@codesourcery.com>
 
 	* ginclude/float.h [!__DEC32_MANT_DIG__]: Do not define DFP
diff --git a/gcc/config/rs6000/rs6000.c b/gcc/config/rs6000/rs6000.c
index 3421faf813f3..d1434a9f7433 100644
--- a/gcc/config/rs6000/rs6000.c
+++ b/gcc/config/rs6000/rs6000.c
@@ -4781,10 +4781,11 @@ rs6000_builtin_vectorization_cost (enum vect_cost_for_stmt type_of_cost,
 	  return 1;
 
       case vec_promote_demote:
-        if (TARGET_VSX)
-          return 4;
-        else
-          return 1;
+	/* Power7 has only one permute/pack unit, make it a bit expensive.  */
+	if (TARGET_VSX && rs6000_tune == PROCESSOR_POWER7)
+	  return 4;
+	else
+	  return 1;
 
       case cond_branch_taken:
         return 3;