[Bug target/41081] redundant ZERO_EXTENDs

[amodra at gcc dot gnu dot org]

------- Comment #6 from amodra at gcc dot gnu dot org  2009-08-23 02:57 -------
Subject: Bug 41081

Author: amodra
Date: Sun Aug 23 02:57:26 2009
New Revision: 151022

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=151022
Log:
        PR target/41081
        * fwprop.c (try_fwprop_subst): Allow multiple sets.
        (get_reg_use_in): New function.
        (forward_propagate_subreg): Propagate through subreg of zero_extend
        or sign_extend.


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


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41081