This plugin adds the musttail attribute which when declared on a function will mark all CALL_EXPRs as being mandatory for tail-call-optimization.
Just run make in this directory.
Add __attribute__((musttail)) to the functions you want to force to have tail call optimization.
Then invoke GCC with the -fplugin option set to the path of the plugin .so file, ex:
export PLUGIN=$(readlink -f must_tail_call_attribute_plugin.so)
gcc -fplugin="${PLUGIN}" -c YOU_SOURCE_FILE.cThis is an experimental plugin. It probably has a lot of bugs and generates wrong code. Use at you own risk.
This plugin has mostly been adapted from the test plugin at gcc/testsuite/gcc.dg/plugin/must_tail_call_plugin.c in GCC's codebase from https://gcc.gnu.org/git/gcc.git and has the same license as GCC.
This program 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.
This program 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 this program; see the file COPYING3. If not, see
<https://www.gnu.org/licenses/>.
Pietro Monteiro pietro@sociotechnical.xyz