r128272 - in /trunk/gcc: ChangeLog testsuite/Ch...

[rakdver@gcc.gnu.org]

Author: rakdver
Date: Sat Sep  8 13:18:49 2007
New Revision: 128272

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=128272
Log:
	PR tree-optimization/32283
	* tree-ssa-loop-ivopts.c (may_eliminate_iv): Use
	estimated_loop_iterations.
	(determine_use_iv_cost_condition): Decrease cost of expressions
	used in iv elimination.

	* gcc.dg/tree-ssa/loop-31.c: New test.


Added:
    trunk/gcc/testsuite/gcc.dg/tree-ssa/loop-31.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-ssa-loop-ivopts.c