[lno] [patch] bring over vectorizer changes from mainline

[Dorit Naishlos <DORIT at il dot ibm dot com>]

Bring over vectorizer changes from the merge to mainline.
Main differences in the vectorizer between lno and mainline are:
1. unknown loop bound support (only in lno)
2. multidimensional array support (only in lno)
3. in lno we still use create_iv, force_gimple,
bsi_insert_on_edge_immediate.
4. build_int_cst not available in lno yet

dorit

2004-08-22  Dorit Naishlos <dorit@il.ibm.com>

        * tree-vectorizer.h (struct _loop_vec_info): Field num_iters is now
        HOST_WIDE_INT.
        * tree-vectorizer.c (vect_get_loop_niters): Takes HOST_WIDE_INT
instead
        of int as argument.
        (vect_analyze_loop_form): number_of_iterations is now
HOST_WIDE_INT.

        (vect_transform_load, vect_is_supportable_load): Replaced with
        vectorizable_load.
        (vect_tranrform_store, vect_is_supportable_store): Replaced with
        vectorizable_store.
        (vect_transform_op, vect_is_supportable_op): Replaced with
        vectorizable_operation.
        (vect_transform_assignment, vect_is_supportable_assignment):
Replaced
        with vectorizable_assignment.
        (vectorizable_load, vectorizable_store, vectorizable_operation):
        (vectorizable_assignment): New functions.
        (vect_analyze_operations): Use above new functions.

        (vect_get_array_first_index): Replaced by vect_get_first_index.
        (vect_get_first_index): New Function.

        (vect_force_dr_alignment_p): Replaced with
        vect_can_force_dr_alignment_p.
        (vect_can_force_dr_alignment_p): New function.
        (vect_get_base_decl_and_bit_offset): New function.
        (vect_compute_array_alignment): Take trees instead of ints as
arguments.
        Return tree (the array base) rather than bool.
        (vect_align_data_ref): Functionality moved to
        vect_analyze_data_ref_alignment.
        (vect_compute_data_ref_alignment): Use above new function. Perform
        arithmetic on trees rather than ints.

        (vect_get_vec_def_for_operand): Test for IS_EMPTY_STMT.
        (vect_is_simple_use): Test for IS_EMPTY_STMT.

        (tree_nargs): Removed.
        (vect_get_new_vect_var): Use concat and avoid unnecessary malloc.
        (vect_create_index_for_array_ref): Remove check of step.
        (vect_create_data_ref): vect_ptr is pointer to array of vectype
(rather
        than pointer to vectype). Use build_fold_addr_expr. Avoid using
        force_gimple.
        (vect_create_destinamtion_var): Remove ALIAS_SET setting.
        (vect_transform_loop_bound): Use fold_convert to assign a type to
        new_loop_bound.
        (vect_analyze_pointer_ref_access): Use host_integerp.
        (vect_analyze_data_refs): Change handling of COMPONENT_REF case;
call
        vect_get_base_decl_and_bit_offset.
        (ANALYZE_ALL_THEN_VECTORIZE_ALL): "#ifdef" removed.

        * optabs.c (optab_for_tree_code): Bring from mainline.
        * optabs.h (optab_for_tree_code): Bring from mainline.


(See attached file: lnodiff.Aug23)

Attachment: lnodiff.Aug23
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