Audit use of lsh and fix glitches

I audited use of lsh in the Lisp source code, and fixed the
glitches that I found.  While I was at it, I replaced uses of lsh
with ash when either will do.  Replacement is OK when either
argument is known to be nonnegative, or when only the low-order
bits of the result matter, and is a (minor) win since ash is a bit
more solid than lsh nowadays, and is a bit faster.
* lisp/calc/calc-ext.el (math-check-fixnum):
Prefer most-positive-fixnum to (lsh -1 -1).
* lisp/vc/vc-hg.el (vc-hg-state-fast): When testing fixnum width,
prefer (zerop (ash most-positive-fixnum -32)) to (zerop (lsh -1
32)) (Bug#32485#11).
* lisp/emacs-lisp/bytecomp.el (byte-compile-lapcode):
Tighten sanity-check for bytecode overflow, by checking that the
result of (ash pc -8) is nonnegative.  Formerly this check was not
needed since lsh was used and the number overflowed differently.
* lisp/net/dns.el (dns-write): Fix some obvious sign typos in
shift counts.  Evidently this part of the code has never been
exercised.
* lisp/progmodes/hideif.el (hif-shiftleft, hif-shiftright):
* lisp/term/common-win.el (x-setup-function-keys):
Simplify.
* admin/unidata/unidata-gen.el, admin/unidata/uvs.el:
* doc/lispref/keymaps.texi, doc/lispref/syntax.texi:
* doc/misc/calc.texi, doc/misc/cl.texi, etc/NEWS.19:
* lisp/arc-mode.el, lisp/calc/calc-bin.el, lisp/calc/calc-comb.el:
* lisp/calc/calc-ext.el, lisp/calc/calc-math.el:
* lisp/cedet/semantic/wisent/comp.el, lisp/composite.el:
* lisp/disp-table.el, lisp/dos-fns.el, lisp/edmacro.el:
* lisp/emacs-lisp/bindat.el, lisp/emacs-lisp/byte-opt.el:
* lisp/emacs-lisp/bytecomp.el, lisp/emacs-lisp/cl-extra.el:
* lisp/erc/erc-dcc.el, lisp/facemenu.el, lisp/gnus/message.el:
* lisp/gnus/nndoc.el, lisp/gnus/nnmaildir.el, lisp/image.el:
* lisp/international/ccl.el, lisp/international/fontset.el:
* lisp/international/mule-cmds.el, lisp/international/mule.el:
* lisp/json.el, lisp/mail/binhex.el, lisp/mail/rmail.el:
* lisp/mail/uudecode.el, lisp/md4.el, lisp/net/dns.el:
* lisp/net/ntlm.el, lisp/net/sasl.el, lisp/net/socks.el:
* lisp/net/tramp.el, lisp/obsolete/levents.el:
* lisp/obsolete/pgg-parse.el, lisp/org/org.el:
* lisp/org/ox-publish.el, lisp/progmodes/cc-defs.el:
* lisp/progmodes/ebnf2ps.el, lisp/progmodes/hideif.el:
* lisp/ps-bdf.el, lisp/ps-print.el, lisp/simple.el:
* lisp/tar-mode.el, lisp/term/common-win.el:
* lisp/term/tty-colors.el, lisp/term/xterm.el, lisp/vc/vc-git.el:
* lisp/vc/vc-hg.el, lisp/x-dnd.el, test/src/data-tests.el:
Prefer ash to lsh when either will do.

1 files changed, 6 insertions, 6 deletions

diff --git a/test/src/data-tests.el b/test/src/data-tests.el
index 688c32d6eeb..701e579ae2e 100644
--- a/test/src/data-tests.el
+++ b/test/src/data-tests.el
@@ -123,7 +123,7 @@ most-positive-fixnum, which is just less than a power of 2.")
       (setq byte (lognot byte)))
   (if (zerop byte)
       0
-    (+ (logand byte 1) (data-tests-popcnt (lsh byte -1)))))
+    (+ (logand byte 1) (data-tests-popcnt (ash byte -1)))))
 
 (ert-deftest data-tests-logcount ()
   (should (cl-loop for n in (number-sequence -255 255)
@@ -186,17 +186,17 @@ most-positive-fixnum, which is just less than a power of 2.")
         (dotimes (_ 4)
           (aset bv i (> (logand 1 n) 0))
           (cl-incf i)
-          (setf n (lsh n -1)))))
+          (setf n (ash n -1)))))
     bv))
 
 (defun test-bool-vector-to-hex-string (bv)
   (let (nibbles (v (cl-coerce bv 'list)))
     (while v
       (push (logior
-             (lsh (if (nth 0 v) 1 0) 0)
-             (lsh (if (nth 1 v) 1 0) 1)
-             (lsh (if (nth 2 v) 1 0) 2)
-             (lsh (if (nth 3 v) 1 0) 3))
+             (ash (if (nth 0 v) 1 0) 0)
+             (ash (if (nth 1 v) 1 0) 1)
+             (ash (if (nth 2 v) 1 0) 2)
+             (ash (if (nth 3 v) 1 0) 3))
             nibbles)
       (setf v (nthcdr 4 v)))
     (mapconcat (lambda (n) (format "%X" n))