[Bug tree-optimization/54776] [4.8 Regression] tramp3d-v4: 20% performance regression using -O3

[hubicka at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54776

--- Comment #9 from Jan Hubicka <hubicka at gcc dot gnu.org> 2012-10-06 15:07:58 UTC ---
Mainline -O3
  Time spent in iteration: 11.0926
LTO (with today fix for resolution info)
  Time spent in iteration: 10.9666
LTO with V1 API hack disabled
  Time spent in iteration: 9.58262
Whole program
  Time spent in iteration: 9.59799
Mainline -O3 --param early-inlining-insns=13 (default is 11)
  Time spent in iteration: 8.94558

So the LTO problem is solved.  I will try to look at the functions with
estimated cost of 12 and 13 to see if I can reduce it. Otherwise I guess we
could simply bump up the early-inlining-insns.  It was set lower based on
tramp3d and because of accounting inconsistency.