https://gcc.gnu.org/bugzilla/show_bug.cgi?id=54742
--- Comment #39 from Sebastian Pop <spop at gcc dot gnu.org> --- Author: spop Date: Sat Dec 6 19:19:37 2014 New Revision: 218451 URL: https://gcc.gnu.org/viewcvs?rev=218451&root=gcc&view=rev Log: extend jump thread for finite state automata PR tree-optimization/54742 * params.def (max-fsm-thread-path-insns, max-fsm-thread-length, max-fsm-thread-paths): New. * doc/invoke.texi (max-fsm-thread-path-insns, max-fsm-thread-length, max-fsm-thread-paths): Documented. * tree-cfg.c (split_edge_bb_loc): Export. * tree-cfg.h (split_edge_bb_loc): Declared extern. * tree-ssa-threadedge.c (simplify_control_stmt_condition): Restore the original value of cond when simplification fails. (fsm_find_thread_path): New. (fsm_find_control_statement_thread_paths): New. (thread_through_normal_block): Call find_control_statement_thread_paths. * tree-ssa-threadupdate.c (dump_jump_thread_path): Pretty print EDGE_FSM_THREAD. (verify_seme): New. (duplicate_seme_region): New. (thread_through_all_blocks): Generate code for EDGE_FSM_THREAD edges calling duplicate_seme_region. * tree-ssa-threadupdate.h (jump_thread_edge_type): Add EDGE_FSM_THREAD. * testsuite/gcc.dg/tree-ssa/ssa-dom-thread-6.c: New test. * testsuite/gcc.dg/tree-ssa/ssa-dom-thread-7.c: New test. Added: trunk/gcc/testsuite/gcc.dg/tree-ssa/ssa-dom-thread-6.c trunk/gcc/testsuite/gcc.dg/tree-ssa/ssa-dom-thread-7.c Modified: trunk/gcc/ChangeLog trunk/gcc/doc/invoke.texi trunk/gcc/params.def trunk/gcc/testsuite/ChangeLog trunk/gcc/tree-cfg.c trunk/gcc/tree-cfg.h trunk/gcc/tree-ssa-threadedge.c trunk/gcc/tree-ssa-threadupdate.c trunk/gcc/tree-ssa-threadupdate.h
