[Bug rtl-optimization/31455] [4.3 Regression] lower subreg causes a performance regression in the inner loop sometimes

[ian at gcc dot gnu dot org]

------- Comment #1 from ian at gcc dot gnu dot org  2007-06-01 15:06 -------
Subject: Bug 31455

Author: ian
Date: Fri Jun  1 15:06:19 2007
New Revision: 125265

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=125265
Log:
        PR rtl-optimization/31455
        * lower-subreg.c (find_decomposable_subregs): Don't decompose
        subregs which have a cast between modes which are not tieable.

Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/lower-subreg.c


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31455