* tree-vectorizer.c (supportable_widening_operation): Support
multi-step conversion, return the number of steps in such conversion
and the required intermediate types.
(supportable_narrowing_operation): Likewise.
* tree-vectorizer.h (vect_pow2): New function.
(supportable_widening_operation): Change argument types.
(supportable_narrowing_operation): Likewise.
(vectorizable_type_promotion): Add an argument.
(vectorizable_type_demotion): Likewise.
* tree-vect-analyze.c (vect_analyze_operations): Call
vectorizable_type_promotion and vectorizable_type_demotion with
additional argument.
(vect_get_and_check_slp_defs): Detect patterns.
(vect_build_slp_tree): Add an argument, don't fail in case of multiple
types.
(vect_analyze_slp_instance): Don't fail in case of multiple types. Call
vect_build_slp_tree with correct arguments. Calculate unrolling factor
according to the smallest type in the loop.
(vect_detect_hybrid_slp_stmts): Include statements from patterns.
* tree-vect-patterns.c (vect_recog_widen_mult_pattern): Call
supportable_widening_operation with correct arguments.
* tree-vect-transform.c (vect_get_slp_defs): Allocate output vector
operands lists according to the number of vector statements in left
or right node, if exists.
(vect_gen_widened_results_half): Remove unused argument.
(vectorizable_conversion): Call supportable_widening_operation,
supportable_narrowing_operation, and vect_gen_widened_results_half
with correct arguments.
(vectorizable_assignment): Change documentation, support multiple
types in SLP.
(vectorizable_operation): Likewise.
(vect_get_loop_based_defs): New function.
(vect_create_vectorized_demotion_stmts): Likewise.
(vectorizable_type_demotion): Support loop-aware SLP and general
multi-step conversion. Call vect_get_loop_based_defs and
vect_create_vectorized_demotion_stmts for transformation.
(vect_create_vectorized_promotion_stmts): New function.
(vectorizable_type_promotion): Support loop-aware SLP and general
multi-step conversion. Call vect_create_vectorized_promotion_stmts
for transformation.
(vectorizable_store): Change documentation, support multiple
types in SLP.
(vectorizable_load): Likewise.
(vect_transform_stmt): Pass SLP_NODE to
vectorizable_type_promotion and vectorizable_type_demotion.
(vect_schedule_slp_instance): Move here the calculation of number
of vectorized statements for each node from...
(vect_schedule_slp): ... here.
(vect_transform_loop): Call vect_schedule_slp without the last
argument.
From-SVN: r139225
