[Bug tree-optimization/26854] Inordinate compile times on large routines

["zadeck at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>]

------- Comment #58 from zadeck at gcc dot gnu dot org  2008-01-19 00:39 -------
Subject: Bug 26854

Author: zadeck
Date: Sat Jan 19 00:38:34 2008
New Revision: 131649

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=131649
Log:
2008-01-18  Kenneth Zadeck  <zadeck@naturalbridge.com>
            Steven Bosscher  <stevenb.gcc@gmail.com>

        PR rtl-optimization/26854
        PR rtl-optimization/34400
        * df-problems.c (df_live_scratch): New scratch bitmap.
        (df_live_alloc): Allocate df_live_scratch when doing df_live.
        (df_live_reset): Clear the proper bitmaps.
        (df_live_bb_local_compute): Only process the artificial defs once
        since the order is not important.
        (df_live_init): Init the df_live sets only with the variables
        found live by df_lr.
        (df_live_transfer_function): Use the df_lr sets to prune the
        df_live sets as they are being computed.  
        (df_live_free): Free df_live_scratch.


Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/df-problems.c


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26854