[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 #20 from Michael Matz <matz at gcc dot gnu.org> 2012-01-26 15:50:43 
UTC ---
Author: matz
Date: Thu Jan 26 15:50:33 2012
New Revision: 183566

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=183566
Log:
    PR tree-optimization/46590
    * cfgexpand.c: Revert last change (r183305).
    * gimplify.c (gimplify_bind_expr): Add clobbers for all non-gimple
    regs.
    * tree-eh.c (cleanup_empty_eh): Try to optimize clobbers before
    checking for emptiness.

Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/cfgexpand.c
    trunk/gcc/gimplify.c
    trunk/gcc/tree-eh.c