r163724 - in /trunk/gcc: ChangeLog cfgloop.h te...

[rguenth at gcc dot gnu dot org]

Author: rguenth
Date: Wed Sep  1 11:39:55 2010
New Revision: 163724

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=163724
Log:
2010-09-01  Richard Guenther  <rguenther@suse.de>

	* tree-vrp.c (adjust_range_with_scev): Use number of iteration
	estimate.
	(vrp_visit_phi_node): Delay using SCEV till we balloon the
	range.
	(execute_vrp): Compute number of iteration estimates.
	* cfgloop.h (estimate_numbers_of_iterations_loop): Adjust prototype.
	* tree-flow.h (estimate_numbers_of_iterations): Likewise.
	* tree-data-ref.c (estimated_loop_iterations): Adjust.
	* tree-ssa-loop-niter.c (estimate_numbers_of_iterations_loop):
	Infer loop bounds from undefined behavior based on a new
	parameter.
	(estimate_numbers_of_iterations): Likewise.
	(scev_probably_wraps_p): Adjust.
	* tree-ssa-loop.c (tree_ssa_loop_bounds): Likewise.

	* gcc.dg/vect/vect-outer-fir.c: Adjust.
	* gcc.dg/tree-ssa/vrp54.c: New testcase.
	* gcc.c-torture/execute/20100827-1.c: Likewise.

Added:
    trunk/gcc/testsuite/gcc.c-torture/execute/20100827-1.c
    trunk/gcc/testsuite/gcc.dg/tree-ssa/vrp54.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/cfgloop.h
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/testsuite/gcc.dg/vect/vect-outer-fir.c
    trunk/gcc/tree-data-ref.c
    trunk/gcc/tree-flow.h
    trunk/gcc/tree-ssa-loop-niter.c
    trunk/gcc/tree-ssa-loop.c
    trunk/gcc/tree-vrp.c