From: Pat Haugen <pthaugen@us.ibm.com>
Date: Thu, 26 May 2011 15:09:31 +0000 (+0000)
Subject: rs6000.c (rs6000_register_move_cost): Make LR/CTR moves expensive on Power7 also.
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=c61e40d377de73443f80d44900c024459b3631e1;p=gcc.git

rs6000.c (rs6000_register_move_cost): Make LR/CTR moves expensive on Power7 also.

        * config/rs6000/rs6000.c (rs6000_register_move_cost): Make LR/CTR
        moves expensive on Power7 also.

From-SVN: r174292
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 2b8478e8480..e72b14439e0 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+2011-05-26  Pat Haugen <pthaugen@us.ibm.com>
+
+	* config/rs6000/rs6000.c (rs6000_register_move_cost): Make LR/CTR
+	moves expensive on Power7 also.
+
 2011-05-26  Richard Guenther  <rguenther@suse.de>
 
 	* fold-const.c (fold_unary_loc): Remove bogus code.
diff --git a/gcc/config/rs6000/rs6000.c b/gcc/config/rs6000/rs6000.c
index 48f387e98b6..d6a12fdbe09 100644
--- a/gcc/config/rs6000/rs6000.c
+++ b/gcc/config/rs6000/rs6000.c
@@ -26444,9 +26444,10 @@ rs6000_register_move_cost (enum machine_mode mode,
       else if (from == CR_REGS)
 	ret = 4;
 
-      /* Power6 has slower LR/CTR moves so make them more expensive than
-	 memory in order to bias spills to memory .*/
-      else if (rs6000_cpu == PROCESSOR_POWER6
+      /* For those processors that have slow LR/CTR moves, make them more
+         expensive than memory in order to bias spills to memory .*/
+      else if ((rs6000_cpu == PROCESSOR_POWER6
+		|| rs6000_cpu == PROCESSOR_POWER7)
 	       && reg_classes_intersect_p (from, LINK_OR_CTR_REGS))
         ret = 6 * hard_regno_nregs[0][mode];