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r112622 - in /branches/csl/sourcerygxx-4_1: Cha...


Author: pbrook
Date: Sun Apr  2 13:19:15 2006
New Revision: 112622

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=112622
Log:
2006-04-02  Paul Brook  <paul@codesourcery.com>

	Backport form mainline.
	* gcc/testsuite/gcc.c-torture/execute/loop-ivopts-3.c: New test.

	2006-01-14  Zdenek Dvorak <dvorakz@suse.cz>
	* gcc/tree-ssa-loop-niter.c (number_of_iterations_cond): Split into
	several functions.
	(number_of_iterations_ne, number_of_iterations_lt_to_ne,
	assert_no_overflow_lt, assert_loop_rolls_lt, number_of_iterations_lt,
	number_of_iterations_le): New functions.
	(number_of_iterations_special): Removed.
	(number_of_iterations_exit): Do not use number_of_iterations_special.
	* gcc/tree.c (unsigned_type_for): Always return integer type.
	* gcc/testsuite/gcc.dg/tree-ssa/pr19210-1.c: Update outcome.
	Add new test loop.
	* gcc/testsuite/gcc.dg/tree-ssa/pr19210-2.c: Ditto.

	2005-01-06  Zdenek Dvorak <dvorakz@suse.cz>
	PR tree-optimization/18527
	* gcc/tree-ssa-loop-niter.c (number_of_iterations_cond,
	number_of_iterations_special, number_of_iterations_exit):
	Move base and step of an iv to a single structure.  Add
	no_overflow flag, and use it in # of iterations analysis.
	* gcc/tree-scalar-evolution.c (analyze_scalar_evolution_in_loop): Add
	folded_casts argument.
	(simple_iv): Pass base and step in a structure.  Set no_overflow
	flag.
	(scev_const_prop): Add argument to analyze_scalar_evolution_in_loop.
	Evaluate expensiveness of computing # of iterations instead of
	the final expression.
	* gcc/tree-scalar-evolution.h (affine_iv): New structure.
	(simple_iv): Declaration changed.
	* gcc/tree-chrec.c (chrec_apply): Handle chrecs containing symbols.
	* gcc/tree-ssa-loop-ivopts.c (determine_biv_step,
	find_givs_in_stmt_scev, find_givs_in_stmt): Changed due to simple_iv
	change.


Added:
    branches/csl/sourcerygxx-4_1/gcc/testsuite/gcc.c-torture/execute/loop-ivopts-3.c
Modified:
    branches/csl/sourcerygxx-4_1/ChangeLog.csl
    branches/csl/sourcerygxx-4_1/gcc/testsuite/gcc.dg/tree-ssa/pr19210-1.c
    branches/csl/sourcerygxx-4_1/gcc/testsuite/gcc.dg/tree-ssa/pr19210-2.c
    branches/csl/sourcerygxx-4_1/gcc/tree-chrec.c
    branches/csl/sourcerygxx-4_1/gcc/tree-scalar-evolution.c
    branches/csl/sourcerygxx-4_1/gcc/tree-scalar-evolution.h
    branches/csl/sourcerygxx-4_1/gcc/tree-ssa-loop-ivopts.c
    branches/csl/sourcerygxx-4_1/gcc/tree-ssa-loop-niter.c
    branches/csl/sourcerygxx-4_1/gcc/tree.c


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