[patch] doc patch - document new operations

[Dorit Naishlos]

It was pointed out in
http://gcc.gnu.org/ml/gcc-patches/2005-06/msg02194.html that I neglected to
document the new reduc_* operations in the manual's "Standard Pattern
Names" section. Also noticed a comment in tree.def about one of these
operations (the vector shift) that had a typo. This patch fixes that.
Tested with 'make info', 'make dvi'.

ok to commit?

thanks,
dorit

:ADDPATCH docs:

Changelog:

      * doc/md.texi (reduc_smin, reduc_umin, reduc_splus, reduc_uplus):
      (vec_shl, vec_shr): Document new operations.
      * tree.def (VEC_RSHIFT_EXPR, VEC_LSHIFT_EXPR): Fix comment.

Patch:

(See attached file: doc.aug8)