[Bug rtl-optimization/42522] (zero_extract:SI (mem:QI) ...) misoptimized

[law at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=42522

--- Comment #18 from Jeffrey A. Law <law at gcc dot gnu.org> ---
Author: law
Date: Wed Apr 15 12:24:28 2015
New Revision: 222125

URL: https://gcc.gnu.org/viewcvs?rev=222125&root=gcc&view=rev
Log:
        PR rtl-optimization/42522
        * cse.c (fold_rtx): Try to simplify a ZERO_EXTRACT or
        SIGN_EXTRACT as a whole object rather than simplifying
        its operand.

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