[Bug middle-end/30907] [4.3 regression] Propagation of addresses within loops pessimizes code

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

------- Comment #5 from bonzini at gnu dot org  2007-03-20 08:31 -------
Subject: Bug 30907

Author: bonzini
Date: Tue Mar 20 08:31:13 2007
New Revision: 123084

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=123084
Log:
2007-03-19  Paolo Bonzini  <bonzini@gnu.org>

        PR rtl-optimization/30907
        * fwprop.c (forward_propagate_into): Never propagate inside a loop.
        (fwprop_init): Always call loop_optimizer_initialize.
        (fwprop_done): Always call loop_optimizer_finalize.
        (fwprop): We always have loop info now.
        (gate_fwprop_addr): Remove.
        (pass_fwprop_addr): Use gate_fwprop as gate.

        PR rtl-optimization/30841
        * df-problems.c (df_ru_local_compute, df_rd_local_compute,
        df_chain_alloc): Call df_reorganize_refs unconditionally.
        * df-scan.c (df_rescan_blocks, df_reorganize_refs): Change
        refs_organized to refs_organized_size.
        (df_ref_create_structure): Use refs_organized_size instead of
        bitmap_size if refs had been organized, and keep refs_organized_size
        up-to-date.
        * df.h (struct df_ref_info): Change refs_organized to
        refs_organized_size.
        (DF_DEFS_SIZE, DF_USES_SIZE): Use refs_organized_size instead of
        bitmap_size.


Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/df-problems.c
    trunk/gcc/df-scan.c
    trunk/gcc/df.h
    trunk/gcc/fwprop.c


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=30907