* config/rs6000/rs6000.c (rs6000_register_move_cost): Make LR/CTR

        moves expensive on Power7 also.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@174292 138bc75d-0d04-0410-961f-82ee72b054a4

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 2b8478e..e72b144 100644 (file)
--- 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 48f387e..d6a12fd 100644 (file)
--- 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];