altivec.md (altivec_vsr<VI_char>): Rename to ..

         * config/rs600/altivec.md (altivec_vsr<VI_char>): Rename to ..
         (lhsr<mode>3): ... new name.
         (altivec_vsra<VI_char>): Rename to ..
         (ashr<mode>3): ... new name.
         * config/rs6000/rs6000.c (builtin_description): Rename shift
         operations.

         testsuite:
         * lib/target-supports.exp (check_effective_target_vect_shif): New.
         * gcc.dg/vect/vect-shift-1.c: New test.

From-SVN: r97636