[Bug middle-end/90340] Not optimal code when compiling switch-case for size, code increase +35%

[marxin at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90340

--- Comment #14 from Martin Liška <marxin at gcc dot gnu.org> ---
Author: marxin
Date: Fri May 10 06:32:31 2019
New Revision: 271053

URL: https://gcc.gnu.org/viewcvs?rev=271053&root=gcc&view=rev
Log:
Add params for jump-table expansion params (PR middle-end/90340).

2019-05-10  Martin Liska  <mli...@suse.cz>

        PR middle-end/90340
        * doc/invoke.texi: New params.
        * params.def (PARAM_JUMP_TABLE_MAX_GROWTH_RATIO_FOR_SIZE): New.
        (PARAM_JUMP_TABLE_MAX_GROWTH_RATIO_FOR_SPEED): Likewise.
        * tree-switch-conversion.c (jump_table_cluster::can_be_handled):
        Use it.
        * tree-switch-conversion.h (struct jump_table_cluster):
        Likewise.
2019-05-10  Martin Liska  <mli...@suse.cz>

        PR middle-end/90340
        * gcc.dg/tree-ssa/pr90340-2.c: New test.
        * gcc.dg/tree-ssa/pr90340.c: New test.

Added:
    trunk/gcc/testsuite/gcc.dg/tree-ssa/pr90340-2.c
    trunk/gcc/testsuite/gcc.dg/tree-ssa/pr90340.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/doc/invoke.texi
    trunk/gcc/params.def
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-switch-conversion.c
    trunk/gcc/tree-switch-conversion.h