[Bug rtl-optimization/22563] [4.0/4.1 Regression] performance regression for gcc newer than 2.95

[sayle at gcc dot gnu dot org]

------- Comment #15 from sayle at gcc dot gnu dot org  2006-05-15 04:43 -------
Subject: Bug 22563

Author: sayle
Date: Mon May 15 04:43:05 2006
New Revision: 113775

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=113775
Log:

        PR rtl-optimization/22563
        Backports from mainline
        * expmed.c (store_fixed_bit_field): When using AND and IOR to store
        a fixed width bitfield, always force the intermediates into pseudos.
        Also check whether the bitsize is valid for the machine's "insv"
        instruction before moving the target into a pseudo for use with
        the insv.
        * config/i386/predicates.md (const8_operand): New predicate.
        * config/i386/i386.md (extv, extzv, insv): Use the new
        const8_operand predicate where appropriate.


Modified:
    branches/gcc-4_1-branch/gcc/ChangeLog
    branches/gcc-4_1-branch/gcc/config/i386/i386.md
    branches/gcc-4_1-branch/gcc/config/i386/predicates.md
    branches/gcc-4_1-branch/gcc/expmed.c


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=22563