From: jiwang <jiwang@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Wed, 19 Nov 2014 14:40:26 +0000 (+0000)
Subject: [AArch64] Adjust generic move costs
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=aa577f0f642afbbdd4820dac4c8c6be17dc4d827;p=thirdparty%2Fgcc.git

[AArch64] Adjust generic move costs

  2014-11-19  Wilco Dijkstra  <wdijkstr@arm.com>

    PR target/61915
    * config/aarch64/aarch64.c (generic_regmove_cost): Increase FP move cost.



git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@217780 138bc75d-0d04-0410-961f-82ee72b054a4
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 2c13f13e4a26..45e12cbd1600 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+2014-11-19  Wilco Dijkstra  <wdijkstr@arm.com>
+
+	PR target/61915
+	* config/aarch64/aarch64.c (generic_regmove_cost): Increase FP move
+	cost.
+
 2014-11-19  Marek Polacek  <polacek@redhat.com>
 
 	PR sanitizer/63690
diff --git a/gcc/config/aarch64/aarch64.c b/gcc/config/aarch64/aarch64.c
index a53f942ad7f5..38321237eb3e 100644
--- a/gcc/config/aarch64/aarch64.c
+++ b/gcc/config/aarch64/aarch64.c
@@ -229,8 +229,10 @@ __extension__
 static const struct cpu_regmove_cost generic_regmove_cost =
 {
   NAMED_PARAM (GP2GP, 1),
-  NAMED_PARAM (GP2FP, 2),
-  NAMED_PARAM (FP2GP, 2),
+  /* Avoid the use of slow int<->fp moves for spilling by setting
+     their cost higher than memmov_cost.  */
+  NAMED_PARAM (GP2FP, 5),
+  NAMED_PARAM (FP2GP, 5),
   NAMED_PARAM (FP2FP, 2)
 };