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 It is out of date with the default interpreter that walks the parse tree.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.

syntax: regexp
## The recurrent (^|/) idiom in the regexps below should be understood
## to mean "at any directory" while the ^ idiom means "from the
## project's top-level directory".

## gnulib related files
(^|/)gnulib$
# This directory gets created by gnulib during the build.
(^|/)libgnu$
# gnulib makes these silly backup files.
.~$

## m4 related files
# This directory mostly contains cruft during build time, but it does
# contain some Octave code, so be more careful about what we ignore here.
^m4/(?!ax_).+\.m4$

## Autoconf, Automake automatically generated files
^aclocal\.m4$
^autom4te\.cache$
^config\.in\.h$
^configure$
(^|/)config.cache$
(^|/)config.h$
(^|/)config.log$
(^|/)config.status$

^Makefile\.in$
^INSTALL$

## CMake associated files
# Octave doesn't use CMake, but some IDEs use this index file to indicate
# what files are part of a project (e.g., CLion).  Ignore it (bug #55901).
^CMakeLists.txt$

## Emacs associated files
(^|/)TAGS$
(^|/)semantic.cache$

## Scripts associated with building Octave
^build-aux/config\.(guess|rpath|sub)$
(^|/)build-aux/check-subst-vars\.sh$
^build-aux/depcomp$
^build-aux/install-sh$
^build-aux/ltmain\.sh$
^build-aux/mdate-sh$
^build-aux/missing$
^build-aux/move-if-change$
(^|/)build-aux/subst-config-vals\.sh$
(^|/)build-aux/subst-cross-config-vals\.sh$
(^|/)build-aux/subst-script-vals\.sh$
^build-aux/texinfo\.tex$
^build-aux/ylwrap$

## Mercurial associated files
(^|/)HG-ID$

## Timestamp files used in build process
.*/\.dirstamp$
.*/\.octave-dirstamp$

## Intermediate compilation results for libraries
\.la$
.*/\.libs/
\.Plo$
\.Po$

## DLDFCN associated files
^libinterp/dldfcn/module\.mk$
(^|/)libinterp/dldfcn/PKG_ADD$
(^|/)libinterp/dldfcn/.*\.oct$

## liboctave/ directory associated patterns
# E.g., liboctave/operators/smx-op-inc.mk
^liboctave/operators/\w+-op-\w+\.mk$

## scripts/ directory associated patterns
# Package files
(^|/)scripts/.*/PKG_ADD$
# Java files
(^|/)scripts/java/octave\.jar$
(^|/)scripts/java/org/octave/.*\.class$

## libgui/ directory associated patterns
# Files generated by moc tool
(^|/)libgui/.*/moc-.*\.(cc|h)$
(^|/)libgui/languages/.*\.qm$

## Ignore patterns associated with documentation
# Info generated files
# E.g., doc/faq/OctaveFAQ.info, doc/interpreter/octave.info-4
^doc/\w+/\w+\.info(-\d+)?$

# Texinfo created temporary directories
(^|/)doc/(interpreter|liboctave)/(octave|liboctave)\.t2(d|p)/
# Texinfo created files
(^|/)doc/interpreter/.*\.texi$

# DOCSTRINGS files built in the source tree
(^|/)(libinterp|scripts)/DOCSTRINGS$

# Generated HTML directories
(^|/)doc/interpreter/octave\.html/
(^|/)doc/liboctave/liboctave\.html/

# Miscellaneous auto-generated files
(^|/)doc/interpreter/octave\.dvi$
(^|/)doc/interpreter/octave\.ps$
(^|/)doc/interpreter/doc-cache$
(^|/)doc/interpreter/octave_interpreter\.q(ch|hc)$

# Images and scripts for documentation
^doc/interpreter/images\.mk$
(^|/)doc/interpreter/.*\.eps$
(^|/)doc/interpreter/.*\.pdf$
(^|/)doc/interpreter/.*\.png$
(^|/)doc/interpreter/.*\.txt$

# timestamps for doc directory
^doc/\w+/stamp-(vti|\d+)$
^doc/\w+/version-\w+\.texi$

## Test associated patterns
-tst$