+2006-12-23 Zdenek Dvorak <dvorakz@suse.cz>
+
+ * tree-ssa-loop-niter.c (number_of_iterations_lt_to_ne,
+ assert_no_overflow_lt, assert_loop_rolls_lt,
+ number_of_iterations_lt, number_of_iterations_le,
+ number_of_iterations_cond, number_of_iterations_exit):
+ Use integer_zerop/integer_nonzerop instead of
+ null_or_integer_zerop/nonnull_and_integer_nonzerop.
+ * tree.h (null_or_integer_zerop, nonnull_and_integer_nonzerop):
+ Removed.
+ * tree-scalar-evolution.c (simple_iv): Return zero for step of
+ an invariant.
+ * tree-ssa-loop-ivopts.c (alloc_iv): Do not set step of invariants
+ to zero.
+ (get_iv): Return NULL for non-scalar types. Use zero as a step
+ of an invariant.
+ (determine_biv_step, find_interesting_uses_op,
+ find_interesting_uses_cond, find_interesting_uses_stmt,
+ add_old_ivs_candidates, determine_use_iv_cost_condition,
+ rewrite_use_compare, remove_unused_ivs):
+ Use integer_zerop instead of null_or_integer_zerop.
+ (struct ifs_ivopts_data): Replace step_p field with step field.
+ (idx_find_step): Use zero as a step of an invariant. Modify
+ step instead of *step_p.
+ (find_interesting_uses_address): Use zero as a step of an invariant.
+ Use integer_zerop instead of null_or_integer_zerop.
+ (find_interesting_uses_outside): Call find_interesting_uses_op only
+ for phi nodes for real operands.
+ (add_candidate_1): Expect step to be non-NULL.
+ * tree-ssa-loop-prefetch.c (idx_analyze_ref): Expect step to be
+ non-NULL.
+