[Bug rtl-optimization/38582] excessive time in rename registers

["bernds at gcc dot gnu dot org" <gcc-bugzilla@gcc.gnu.org>]

------- Comment #4 from bernds at gcc dot gnu dot org  2009-11-12 18:12 -------
Subject: Bug 38582

Author: bernds
Date: Thu Nov 12 18:12:09 2009
New Revision: 154123

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=154123
Log:
        PR rtl-opt/38582
        * regrename.c (struct du_head): New structure; some elements moved
        from...
        (struct du_chain): ... this one.
        (open_chains, closed_chains): Now of type struct du_head *.
        (do_replace): Accept du_head argument, not du_chain.  All callers
        changed.  Modified code to match new data structures.
        (build_def_use): Return a list of du_head structures.  Modified code
        to match new data structures.
        (dump_def_use_chain): Accept du_head argument, not du_chain.  All
        callers changed.  Modified code to match new data structures.
        (merge_overlapping_regs): Accept du_head argument, not du_chain.  All
        callers changed.  Modified code to match new data structures.
        (scan_rtx_reg): Change type of this_regno and this_nregs to unsigned.
        Allocate a du_head structure as well as a du_chain when creating a
        new chain.  Modified other code to match new data structures.


Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/regrename.c


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38582