[Bug tree-optimization/86702] [9 Regression] SPEC CPU2006 400.perlbench, CPU2017 500.perlbench_r ~3% performance drop after r262247

[marxin at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86702

--- Comment #5 from Martin Liška <marxin at gcc dot gnu.org> ---
Author: marxin
Date: Mon Aug 27 12:17:54 2018
New Revision: 263877

URL: https://gcc.gnu.org/viewcvs?rev=263877&root=gcc&view=rev
Log:
Fix probabilities for jump table (PR tree-optimization/86702).

2018-08-27  Martin Liska  <mli...@suse.cz>

        PR tree-optimization/86702
        * tree-switch-conversion.c (jump_table_cluster::emit):
        Make probabilities even for values in jump table
        according to number of cases handled.
        (switch_decision_tree::compute_cases_per_edge): Pass
        argument to reset_out_edges_aux function.
        (switch_decision_tree::analyze_switch_statement): Likewise.
        * tree-switch-conversion.h (switch_decision_tree::reset_out_edges_aux):
        Make it static.

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