[Bug rtl-optimization/47477] [4.8/4.9/5 regression] Sub-optimal mov at end of method

[law at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=47477

--- Comment #21 from Jeffrey A. Law <law at gcc dot gnu.org> ---
Author: law
Date: Fri Feb 13 20:17:55 2015
New Revision: 220695

URL: https://gcc.gnu.org/viewcvs?rev=220695&root=gcc&view=rev
Log:
    PR rtl-optimization/47477
    * match.pd (convert (plus/minus (convert @0) (convert @1): New
    simplifier to narrow arithmetic.

    PR rtl-optimization/47477
    * gcc.dg/tree-ssa/pr47477.c: New test.

Added:
    trunk/gcc/testsuite/gcc.dg/tree-ssa/pr47477.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/match.pd
    trunk/gcc/testsuite/ChangeLog