[Bug rtl-optimization/58295] [4.8/4.9 regression] Missed zero-extension elimination in the combiner

[ebotcazou at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58295

--- Comment #15 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
Author: ebotcazou
Date: Tue Dec 10 22:59:27 2013
New Revision: 205875

URL: http://gcc.gnu.org/viewcvs?rev=205875&root=gcc&view=rev
Log:
    PR rtl-optimization/58295
    * simplify-rtx.c (simplify_truncation): Restrict the distribution for
    WORD_REGISTER_OPERATIONS targets.

Modified:
    branches/gcc-4_8-branch/gcc/ChangeLog
    branches/gcc-4_8-branch/gcc/simplify-rtx.c