[Bug rtl-optimization/19097] [3.4/4.0/4.1 regression] Quadratic behavior with many sets for the same register in gcse CPROP

Mon Sep 19 00:14:00 GMT 2005

------- Additional Comments From pinskia at gcc dot gnu dot org  2005-09-19 00:14 -------
For -O1 on x86_64-pc-linux-gnu:

For 4.1.0:
 tree operand scan     :  18.28 (50%) usr   0.10 (18%) sys  18.33 (50%) wall     402 kB ( 0%) ggc
That is the same issue as PR 21430

For both 4.0.0 and 4.1.0:
4.0.0:
 dominance frontiers   :  12.80 (66%) usr   0.00 ( 0%) sys  12.82 (64%) wall
4.1.0:
 dominance frontiers   :  10.87 (30%) usr   0.00 ( 0%) sys  10.89 (30%) wall       0 kB ( 0%) ggc


-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
  BugsThisDependsOn|                            |21430


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19097