re PR tree-optimization/32183 (reassoc2 can more extra calculations into a loop)

re PR tree-optimization/32183 (reassoc2 can more extra calculations into a loop)

2007-09-07  Zdenek Dvorak  <ook@ucw.cz>

	PR tree-optimization/32183
	* Makefile.in (tree-ssa-reassoc.o): Also depend on $(CFGLOOP_H).

	* tree-ssa-reassoc.c: Include cfgloop.h.
	(is_reassociable_op): Add a loop argument and return true only
	for inside loop.
	(linearize_expr): Updated.
	(should_break_up_subtract): Likewise.
	(linearize_expr_tree): Likewise.
	(init_reassoc): Call loop_optimizer_init with
	AVOID_CFG_MODIFICATIONS.  Remove calculate_dominance_info call
	with CDI_DOMINATORS.
	(fini_reassoc): Call loop_optimizer_finalize.

From-SVN: r128262