[Bug rtl-optimization/69847] Spec 2006 403.gcc slows down with -mlra vs. reload on PowerPC

[vmakarov at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69847

--- Comment #19 from Vladimir Makarov <vmakarov at gcc dot gnu.org> ---
Author: vmakarov
Date: Tue Aug  2 16:07:36 2016
New Revision: 238991

URL: https://gcc.gnu.org/viewcvs?rev=238991&root=gcc&view=rev
Log:
2016-08-02  Vladimir Makarov  <vmakarov@redhat.com>

        PR rtl-optimization/69847
        * lra-int.h (struct lra-reg): Use restore_rtx instead of
        restore_regno.
        (lra_rtx_hash): New.
        * lra.c (initialize_lra_reg_info_element): Use restore_rtx instead
        of restore_regno.
        (lra_rtx_hash): Rename and move lra-remat.c::rtx_hash.
        * lra-remat.c (rtx_hash): Rename and Move to lra.c.
        * lra-spills.c (lra_final_code_change): Don't delete insn when the
        next insn is USE with the same reg as the current insn source.
        * lra-constraints.c (curr_insn_transform): Use restore_rtx instead
        of restore_regno.
        (lra_constraints_init): Call initiate_invariants.
        (lra_constraints_finish): Call finish_invariants.
        (struct invariant, invariant_t, invariant_ptr_t): New.
        (const_invariant_ptr_t, invariants, invariants_pool): New.
        (invariant_table, invariant_hash, invariant_eq_p): New.
        (insert_invariant, initiate_invariants, finish_invariants): New.
        (clear_invariants, invalid_invariant_regs): New.
        (inherit_reload_reg, split_reg, fix_bb_live_info): Use restore_rtx
        instead of restore_regno.
        (invariant_p, process_invariant_for_inheritance): New.
        (inherit_in_ebb): Implement invariant inheritance.
        (lra_inheritance): Initialize and finalize invalid_invariant_regs.
        (remove_inheritance_pseudos): Implement undoing invariant
        inheritance.
        (undo_optional_reloads, lra_undo_inheritance): Use restore_rtx
        instead of restore_regno.
        * lra-assigns.c (regno_live_length): New.
        (reload_pseudo_compare_func): Use regno_live_length.
        (assign_by_spills): Use restore_rtx instead of restore_regno.
        (lra_assign): Ditto.  Initiate regno_live_length.


Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/lra-assigns.c
    trunk/gcc/lra-constraints.c
    trunk/gcc/lra-int.h
    trunk/gcc/lra-remat.c
    trunk/gcc/lra-spills.c
    trunk/gcc/lra.c