Break out profile updating code from gimple_duplicate_sese_region
Move profile updating to tree-ssa-loop-ch.cc since it is
now quite ch specific. There are no functional changes.
Boostrapped/regtesed x86_64-linux, comitted.
gcc/ChangeLog:
* tree-cfg.cc (gimple_duplicate_sese_region): Rename to ...
(gimple_duplicate_seme_region): ... this; break out profile updating
code to ...
* tree-ssa-loop-ch.cc (update_profile_after_ch): ... here.
(ch_base::copy_headers): Update.
* tree-cfg.h (gimple_duplicate_sese_region): Rename to ...
(gimple_duplicate_seme_region): ... this.