Add -mtune-ctrl=sse_typeless_stores to avx256-unaligned-store-2.c

Since avx256-unaligned-store-2.c scans typeless SSE stores, add
-mtune-ctrl=sse_typeless_stores to enable typeless SSE stores.

	* gcc.target/i386/avx256-unaligned-store-2.c: Add
	-mtune-ctrl=sse_typeless_stores.

From-SVN: r235296

gcc/testsuite/ChangeLog

 2016-04-20  H.J. Lu  <hongjiu.lu@intel.com>
 
+	* gcc.target/i386/avx256-unaligned-store-2.c: Add
+	-mtune-ctrl=sse_typeless_stores.
+
+2016-04-20  H.J. Lu  <hongjiu.lu@intel.com>
+
 	* gcc.target/i386/avx256-unaligned-load-1.c: Update load scan.
 
 2016-04-20  Bin Cheng  <bin.cheng@arm.com>

gcc/testsuite/gcc.target/i386/avx256-unaligned-store-2.c

 /* { dg-do compile { target { ! ia32 } } } */
-/* { dg-options "-O3 -dp -mavx -mavx256-split-unaligned-store -mno-prefer-avx128" } */
+/* { dg-options "-O3 -mtune-ctrl=sse_typeless_stores -dp -mavx -mavx256-split-unaligned-store -mno-prefer-avx128" } */
 
 #define N 1024