[Bug tree-optimization/96979] [8/9/10/11 Regression] Switch with case values derived from constexpr function takes unreasonable time to compile

[cvs-commit at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96979

--- Comment #4 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Martin Liska <mar...@gcc.gnu.org>:

https://gcc.gnu.org/g:c6df6039e9180c580945266302ec14047d358364

commit r11-3357-gc6df6039e9180c580945266302ec14047d358364
Author: Martin Liska <mli...@suse.cz>
Date:   Tue Sep 22 12:23:35 2020 +0200

    switch lowering: limit number of cluster attemps

    gcc/ChangeLog:

            PR tree-optimization/96979
            * doc/invoke.texi: Document new param
max-switch-clustering-attempts.
            * params.opt: Add new parameter.
            * tree-switch-conversion.c (jump_table_cluster::find_jump_tables):
            Limit number of attempts.
            (bit_test_cluster::find_bit_tests): Likewise.

    gcc/testsuite/ChangeLog:

            PR tree-optimization/96979
            * g++.dg/tree-ssa/pr96979.C: New test.