[PATCH][AArch64] Fix gcc.target/aarch64/vect-reduc-or_1.c for -mcpu=cortex-a57

[Kyrill Tkachov]

Hi all,

I've been seeing this test FAIL for a toolchain configured with 
--with-cpu=cortex-a57 in the
scan vectoriser dump check because the cost model for -mtune=cortex-a57 decides 
not to vectorise.

This patch disables the vectoriser cost model and makes this test pass on all
configurations. I think this test is supposed to test the capabilities of the 
vectoriser
rather than the cost model decisions (we'd have to add a specific -mtune option 
otherwise)

Ok for trunk?

Thanks,
Kyrill

2016-03-11  Kyrylo Tkachov  <kyrylo.tkac...@arm.com>

    * gcc.target/aarch64/vect-reduc-or_1.c: Add -fno-vect-cost-model to
    dg-options.

diff --git a/gcc/testsuite/gcc.target/aarch64/vect-reduc-or_1.c b/gcc/testsuite/gcc.target/aarch64/vect-reduc-or_1.c
index cfb1231d69bbabac3da931cee2fd3fd786a29305..6261e9d1ea6fa8949d392543e08b880477a1ed5d 100644
--- a/gcc/testsuite/gcc.target/aarch64/vect-reduc-or_1.c
+++ b/gcc/testsuite/gcc.target/aarch64/vect-reduc-or_1.c
@@ -1,5 +1,5 @@
 /* { dg-do run } */
-/* { dg-options "-O2 -ftree-vectorize -fdump-tree-vect-all" } */
+/* { dg-options "-O2 -ftree-vectorize -fdump-tree-vect-all -fno-vect-cost-model" } */
 /* Write a reduction loop to be reduced using whole vector right shift.  */
 
 extern void abort (void);