[Bug tree-optimization/46590] [4.5/4.6/4.7 Regression] long compile time with -O2 and many loops

[matz at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46590

--- Comment #18 from Michael Matz <matz at gcc dot gnu.org> 2012-01-19 15:06:14 
UTC ---
Author: matz
Date: Thu Jan 19 15:06:04 2012
New Revision: 183305

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=183305
Log:
        PR tree-optimization/46590
    * cfgexpand.c (add_scope_conflicts_1): New old_conflicts argument,
    use it in remembering which conflicts we already created.
    (add_scope_conflicts): Adjust call to above, (de)allocate helper
    bitmap.

Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/cfgexpand.c