[Bug tree-optimization/43627] [4.5 Regression] slow compilation (tree canonical iv takes 75%)

[rguenth at gcc dot gnu dot org]

------- Comment #19 from rguenth at gcc dot gnu dot org  2010-04-06 12:32 
-------
Subject: Bug 43627

Author: rguenth
Date: Tue Apr  6 12:32:25 2010
New Revision: 157992

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=157992
Log:
2010-04-06  Richard Guenther  <rguent...@suse.de>

        PR tree-optimization/43627
        * tree-vrp.c (extract_range_from_unary_expr): Widenings
        of [1, +INF(OVF)] go to [1, +INF(OVF)] of the wider type,
        not varying.

        * gcc.dg/tree-ssa/vrp49.c: New testcase.

Added:
    trunk/gcc/testsuite/gcc.dg/tree-ssa/vrp49.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-vrp.c


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43627