fold-vec-ld-longlong.c: Add lp64 requirement.

[gcc/testsuite]

2017-09-14  Will Schmidt  <will_schmidt@vnet.ibm.com>

	* gcc.target/powerpc/fold-vec-ld-longlong.c: Add lp64 requirement.

From-SVN: r252757

gcc/testsuite/ChangeLog

+2017-09-14  Will Schmidt  <will_schmidt@vnet.ibm.com>
+
+	* gcc.target/powerpc/fold-vec-ld-longlong.c: Add
+	lp64 requirement.
+
 2017-09-14  Richard Biener  <rguenther@suse.de>
 
 	* gcc.dg/tree-ssa/ssa-fre-59.c: New testcase.

gcc/testsuite/gcc.target/powerpc/fold-vec-ld-longlong.c

 /* Verify that overloaded built-ins for vec_ld* with long long
    inputs produce the right code.  */
 
-/* { dg-do compile } */
+/* { dg-do compile { target lp64 } } */
 /* { dg-require-effective-target powerpc_p8vector_ok } */
 /* { dg-options "-mpower8-vector -O2" } */