[Bug target/60884] New: [SH] improve inlined strlen-like builtin functions

["olegendo at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60884

            Bug ID: 60884
           Summary: [SH] improve inlined strlen-like builtin functions
           Product: gcc
           Version: 4.10.0
            Status: UNCONFIRMED
          Severity: enhancement
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: olegendo at gcc dot gnu.org
            Target: sh*-*-*

This is a carry over from the proposed improvement to the strlen-like builtin
functions by Christian.  The idea is to unroll some of the loops that are
expanded:
http://gcc.gnu.org/ml/gcc-patches/2014-03/msg01406.html

As mentioned in
http://gcc.gnu.org/ml/gcc-patches/2014-03/msg01687.html

maybe the unrolling should be done at -O3 and not at -O2, since it increases
code size in some places, but does not seem to lead to significant speed
improvements (~ 1% as measured by Christian).