remove JIT compiler from Octave sources As stated in the NEWS file entry added with this changeset, no one has ever seriously taken on further development of the JIT compiler in Octave since it was first added as part of a Google Summer of Code project in 2012 and it still does nothing significant. It is out of date with the default interpreter that walks the parse tree. Even though we have fixed the configure script to disable it by default, people still ask questions about how to build it, but it doesn’t seem that they are doing that to work on it but because they think it will make Octave code run faster (it never did, except for some extremely simple bits of code as examples for demonstration purposes only). * NEWS: Note change. * configure.ac, acinclude.m4: Eliminate checks and macros related to the JIT compiler and LLVM. * basics.txi, install.txi, octave.texi, vectorize.txi: Remove mention of JIT compiler and LLVM. * jit-ir.cc, jit-ir.h, jit-typeinfo.cc, jit-typeinfo.h, jit-util.cc, jit-util.h, pt-jit.cc, pt-jit.h: Delete. * libinterp/parse-tree/module.mk: Update. * Array-jit.cc: Delete. * libinterp/template-inst/module.mk: Update. * test/jit.tst: Delete. * test/module.mk: Update. * interpreter.cc (interpreter::interpreter): Don't check options for debug_jit or jit_compiler. * toplev.cc (F__octave_config_info__): Remove JIT compiler and LLVM info from struct. * ov-base.h (octave_base_value::grab, octave_base_value::release): Delete. * ov-builtin.h, ov-builtin.cc (octave_builtin::to_jit, octave_builtin::stash_jit): Delete. (octave_builtin::m_jtype): Delete data member and all uses. * ov-usr-fcn.h, ov-usr-fcn.cc (octave_user_function::m_jit_info): Delete data member and all uses. (octave_user_function::get_info, octave_user_function::stash_info): Delete. * options.h (DEBUG_JIT_OPTION, JIT_COMPILER_OPTION): Delete macro definitions and all uses. * octave.h, octave.cc (cmdline_options::cmdline_options): Don't handle DEBUG_JIT_OPTION, JIT_COMPILER_OPTION): Delete. (cmdline_options::debug_jit, cmdline_options::jit_compiler): Delete functions and all uses. (cmdline_options::m_debug_jit, cmdline_options::m_jit_compiler): Delete data members and all uses. (octave_getopt_options long_opts): Remove "debug-jit" and "jit-compiler" from the list. * pt-eval.cc (tree_evaluator::visit_simple_for_command, tree_evaluator::visit_complex_for_command, tree_evaluator::visit_while_command, tree_evaluator::execute_user_function): Eliminate JIT compiler code. * pt-loop.h, pt-loop.cc (tree_while_command::get_info, tree_while_command::stash_info, tree_simple_for_command::get_info, tree_simple_for_command::stash_info): Delete functions and all uses. (tree_while_command::m_compiled, tree_simple_for_command::m_compiled): Delete member variable and all uses. * usage.h (usage_string, octave_print_verbose_usage_and_exit): Remove [--debug-jit] and [--jit-compiler] from the message. * Array.h (Array<T>::Array): Remove constructor that was only intended to be used by the JIT compiler. (Array<T>::jit_ref_count, Array<T>::jit_slice_data, Array<T>::jit_dimensions, Array<T>::jit_array_rep): Delete. * Marray.h (MArray<T>::MArray): Remove constructor that was only intended to be used by the JIT compiler. * NDArray.h (NDArray::NDarray): Remove constructor that was only intended to be used by the JIT compiler. * dim-vector.h (dim_vector::to_jit): Delete. (dim_vector::dim_vector): Remove constructor that was only intended to be used by the JIT compiler. * codeql-analysis.yaml, make.yaml: Don't require llvm-dev. * subst-config-vals.in.sh, subst-cross-config-vals.in.sh: Don't substitute OCTAVE_CONF_LLVM_CPPFLAGS, OCTAVE_CONF_LLVM_LDFLAGS, or OCTAVE_CONF_LLVM_LIBS. * Doxyfile.in: Don't define HAVE_LLVM. * aspell-octave.en.pws: Eliminate jit, JIT, and LLVM from the list of spelling exceptions. * build-env.h, build-env.in.cc (LLVM_CPPFLAGS, LLVM_LDFLAGS, LLVM_LIBS): Delete variables and all uses. * libinterp/corefcn/module.mk (%canon_reldir%_libcorefcn_la_CPPFLAGS): Remove $(LLVM_CPPFLAGS) from the list. * libinterp/parse-tree/module.mk (%canon_reldir%_libparse_tree_la_CPPFLAGS): Remove $(LLVM_CPPFLAGS) from the list.

########################################################################
##
## Copyright (C) 1995-2021 The Octave Project Developers
##
## See the file COPYRIGHT.md in the top-level directory of this
## distribution or <https://octave.org/copyright/>.
##
## This file is part of Octave.
##
## Octave is free software: you can redistribute it and/or modify it
## under the terms of the GNU General Public License as published by
## the Free Software Foundation, either version 3 of the License, or
## (at your option) any later version.
##
## Octave is distributed in the hope that it will be useful, but
## WITHOUT ANY WARRANTY; without even the implied warranty of
## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
## GNU General Public License for more details.
##
## You should have received a copy of the GNU General Public License
## along with Octave; see the file COPYING.  If not, see
## <https://www.gnu.org/licenses/>.
##
########################################################################

## -*- texinfo -*-
## @deftypefn  {} {@var{z} =} xor (@var{x}, @var{y})
## @deftypefnx {} {@var{z} =} xor (@var{x1}, @var{x2}, @dots{})
## Return the @dfn{exclusive or} of @var{x} and @var{y}.
##
## For boolean expressions @var{x} and @var{y},
## @code{xor (@var{x}, @var{y})} is true if and only if one of @var{x} or
## @var{y} is true.  Otherwise, if @var{x} and @var{y} are both true or both
## false, @code{xor} returns false.
##
## The truth table for the xor operation is
##
## @multitable @columnfractions 0.44 .03 .05 .03 0.44
## @item @tab @var{x} @tab @var{y} @tab @var{z} @tab
## @item @tab - @tab - @tab - @tab
## @item @tab 0 @tab 0 @tab 0 @tab
## @item @tab 1 @tab 0 @tab 1 @tab
## @item @tab 0 @tab 1 @tab 1 @tab
## @item @tab 1 @tab 1 @tab 0 @tab
## @end multitable
##
## If more than two arguments are given the xor operation is applied
## cumulatively from left to right:
##
## @example
## (@dots{}((x1 XOR x2) XOR x3) XOR @dots{})
## @end example
##
## @seealso{and, or, not}
## @end deftypefn

function z = xor (x, y, varargin)

  if (nargin < 2)
    print_usage ();
  endif

  z = __xor__ (x, y);

  ## Slow expansion to multiple arguments.
  ## Probably okay number of elements will be small.
  if (! isempty (varargin))
    for i = 1:numel (varargin)
      z = __xor__ (z, varargin{i});
    endfor
  endif

endfunction

function z = __xor__ (x, y)

  if (isscalar (x) || isscalar (y) || size_equal (x, y))
    ## Typecast to logicals is necessary for other numeric types.
    z = logical (x) != logical (y);
  else
    try
      z = bsxfun (@xor, x, y);
    catch
      error ("xor: X and Y must be of compatible size or scalars");
    end_try_catch
  endif

endfunction


%!assert (xor ([1, 1, 0, 0], [0, 1, 0, 1]), logical ([1, 0, 0, 1]))
%!assert (xor ([i, i, 0, 0], [1, 0, 1, 0]), logical ([0, 1, 1, 0]))

%!assert (xor (eye (2), fliplr (eye (2))), logical (ones (2)))
%!assert (xor (speye (2), fliplr (speye (2))), sparse (logical (ones (2))))

## Test XOR reduction
%!assert (xor ([1 0], [1 1], [0 0]), logical ([0 1]))

## Test input validation
%!error <Invalid call> xor ()
%!error <Invalid call> xor (1)
%!error <X and Y must be of compatible size> xor (ones (3,2), ones (2,3))