From 781aeb73bccb86d892e1f565e807a2dfa647e4ee Mon Sep 17 00:00:00 2001
From: Kyrylo Tkachov <kyrylo.tkachov@arm.com>
Date: Tue, 22 Jul 2014 13:39:16 +0000
Subject: [PATCH] [AArch64][2/2] Add rtx cost function handling of clz, clrsb,
 rbit.

	* config/aarch64/aarch64.c (aarch64_rtx_costs): Handle CLRSB, CLZ.
	(case UNSPEC): Handle UNSPEC_RBIT.

From-SVN: r212913
---
 gcc/ChangeLog                |  5 +++++
 gcc/config/aarch64/aarch64.c | 15 +++++++++++++++
 2 files changed, 20 insertions(+)

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 5c972bb462be..f40cfd95b003 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+2014-07-22  Kyrylo Tkachov  <kyrylo.tkachov@arm.com>
+
+	* config/aarch64/aarch64.c (aarch64_rtx_costs): Handle CLRSB, CLZ.
+	(case UNSPEC): Handle UNSPEC_RBIT.
+
 2014-07-22  Kyrylo Tkachov  <kyrylo.tkachov@arm.com>
 
 	* config/aarch64/aarch64.md: Delete UNSPEC_CLS.
diff --git a/gcc/config/aarch64/aarch64.c b/gcc/config/aarch64/aarch64.c
index 5f8db1dc01ed..56a0e443ce10 100644
--- a/gcc/config/aarch64/aarch64.c
+++ b/gcc/config/aarch64/aarch64.c
@@ -5151,6 +5151,13 @@ aarch64_rtx_costs (rtx x, int code, int outer ATTRIBUTE_UNUSED,
 
       return false;
 
+    case CLRSB:
+    case CLZ:
+      if (speed)
+        *cost += extra_cost->alu.clz;
+
+      return false;
+
     case COMPARE:
       op0 = XEXP (x, 0);
       op1 = XEXP (x, 1);
@@ -5796,6 +5803,14 @@ cost_plus:
 
           return false;
         }
+
+      if (XINT (x, 1) == UNSPEC_RBIT)
+        {
+          if (speed)
+            *cost += extra_cost->alu.rev;
+
+          return false;
+        }
       break;
 
     case TRUNCATE: