r262211 - in /trunk/gcc: ChangeLog testsuite/Ch...

[marxin@gcc.gnu.org]

Author: marxin
Date: Thu Jun 28 07:14:57 2018
New Revision: 262211

URL: https://gcc.gnu.org/viewcvs?rev=262211&root=gcc&view=rev
Log:
Fix clustering algorithm in switch expansion.

2018-06-28  Martin Liska  <mliska@suse.cz>

	* tree-switch-conversion.c (jump_table_cluster::find_jump_tables):
        Add new checking assert to catch invalid state.
	(jump_table_cluster::can_be_handled): Handle single case
        clusters.
	(jump_table_cluster::is_beneficial): Bail out for such case.
	(bit_test_cluster::find_bit_tests):
        Add new checking assert to catch invalid state.
	(bit_test_cluster::can_be_handled): Handle single case
        clusters.
	(bit_test_cluster::is_beneficial): Bail out for such case.
	(switch_decision_tree::analyze_switch_statement):
        Fix comment.
2018-06-28  Martin Liska  <mliska@suse.cz>

	* gcc.dg/tree-ssa/switch-1.c: New test.

Added:
    trunk/gcc/testsuite/gcc.dg/tree-ssa/switch-1.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-switch-conversion.c