All cores which add a cpu_addrcost_table use a non-zero value for HI and TI...

All cores which add a cpu_addrcost_table use a non-zero value for
HI and TI mode shifts (a non-zero value for general indexing also
applies to all shifts).  Given this, it makes no sense to use a
different setting in generic_addrcost_table.  So change it so that
all supported cores, including -mcpu=generic, now generate the same:

int f(short *p, short *q, long x) { return p[x] + q[x]; }

        lsl     x2, x2, 1
        ldrsh   w3, [x0, x2]
        ldrsh   w0, [x1, x2]
        add     w0, w3, w0
        ret

    gcc/
	* config/aarch64/aarch64.c (generic_addrcost_table):
	Change HI/TI mode setting.

From-SVN: r247606

gcc/ChangeLog

+2017-05-04  Wilco Dijkstra  <wdijkstr@arm.com>
+
+	* config/aarch64/aarch64.c (generic_addrcost_table):
+	Change HI/TI mode setting.
+
 2017-05-04  Martin Jambor  <mjambor@suse.cz>
 
 	PR tree-optimization/80622

gcc/config/aarch64/aarch64.c

@@ -193,10 +193,10 @@ static const struct aarch64_flag_desc aarch64_tuning_flags[] =
 static const struct cpu_addrcost_table generic_addrcost_table =
 {
     {
-      0, /* hi  */
+      1, /* hi  */
       0, /* si  */
       0, /* di  */
-      0, /* ti  */
+      1, /* ti  */
     },
   0, /* pre_modify  */
   0, /* post_modify  */