[Bug tree-optimization/63464] compare one character to many: faster

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63464

--- Comment #8 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Fri Oct 10 12:15:30 2014
New Revision: 216072

URL: https://gcc.gnu.org/viewcvs?rev=216072&root=gcc&view=rev
Log:
    PR tree-optimization/63464
    * tree-switch-conversion.c (struct case_bit_test): Remove
    hi and lo fields, add wide_int mask field.
    (emit_case_bit_tests): Add MAXVAL argument, rewrite uses of
    hi/lo fields into wide_int mask operations, optimize by pretending
    minval to be 0 if maxval is small enough.
    (process_switch): Adjust caller.

Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/tree-switch-conversion.c