commit 30857e8a8ff816244c49b3c76b6044c1d5cc9f2f
Author: Kyrylo Tkachov <kyrylo.tkachov@arm.com>
Date:   Tue Mar 3 10:10:53 2015 +0000

    [AArch64] Do not overwrite BSWAP rtx cost, let recursion handle the operand

diff --git a/gcc/config/aarch64/aarch64.c b/gcc/config/aarch64/aarch64.c
index 6083fd4..e19b592 100644
--- a/gcc/config/aarch64/aarch64.c
+++ b/gcc/config/aarch64/aarch64.c
@@ -5995,7 +5995,6 @@ cost_plus:
       }
 
     case BSWAP:
-      *cost = COSTS_N_INSNS (1);
 
       if (speed)
         *cost += extra_cost->alu.rev;