[Bug target/56102] Wrong rtx cost calculated for Thumb1

[amker.cheng at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56102

--- Comment #2 from bin.cheng <amker.cheng at gmail dot com> 2013-01-25 07:25:34 UTC ---
Created attachment 29270
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=29270
correct test case

The previous test case is not appropriate, because gcc won't split even with
correct thumb1_rtx_cost.
Here attaches the right test case.