[Bug target/61098] Poor code setting count register for large loops

[amodra at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=61098

--- Comment #1 from Alan Modra <amodra at gmail dot com> ---
Created attachment 32754
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=32754&action=edit
testcase