[Bug tree-optimization/46590] [4.6/4.7/4.8 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 #34 from Michael Matz <matz at gcc dot gnu.org> 2012-09-03 15:39:20 
UTC ---
Author: matz
Date: Mon Sep  3 15:39:15 2012
New Revision: 190897

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=190897
Log:
    PR tree-optimization/46590
    * tree-cfg.c (gimple_duplicate_sese_region): Don't update
    SSA web here ...
    * tree-ssa-loop-ch.c (copy_loop_headers): ... but here.

Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/tree-cfg.c
    trunk/gcc/tree-ssa-loop-ch.c