33f1d03870
This refactors the main loop analysis part in vect_analyze_loop, re-purposing the existing vect_reanalyze_as_main_loop for this to reduce code duplication. Failure flow is a bit tricky since we want to extract info from the analyzed loop but I wanted to share the destruction part. Thus I add some std::function and lambda to funnel post-analysis for the case we want that (when analyzing from the main iteration but not when re-analyzing an epilogue as main). In addition I split vect_analyze_loop_form into analysis and vinfo creation so we can do the analysis only once, simplifying the new vect_analyze_loop_1. As discussed we probably want to change the loop over vector modes to first only analyze things as the main loop, picking the best (or simd VF) mode for the main loop and then analyze for a vectorized epilogue. The unroll would then integrate with the main loop vectorization. I think that currently we may fail to analyze the epilogue with the same mode as the main loop when using partial vectors since we increment mode_i before doing that. 2021-11-04 Richard Biener <rguenther@suse.de> * tree-vectorizer.h (struct vect_loop_form_info): New. (vect_analyze_loop_form): Adjust. (vect_create_loop_vinfo): New. * tree-parloops.c (gather_scalar_reductions): Adjust for vect_analyze_loop_form API change. * tree-vect-loop.c: Include <functional>. (vect_analyze_loop_form_1): Rename to vect_analyze_loop_form, take struct vect_loop_form_info as output parameter and adjust. (vect_analyze_loop_form): Rename to vect_create_loop_vinfo and split out call to the original vect_analyze_loop_form_1. (vect_reanalyze_as_main_loop): Rename to... (vect_analyze_loop_1): ... this, factor out the call to vect_analyze_loop_form and generalize to be able to use it twice ... (vect_analyze_loop): ... here. Perform vect_analyze_loop_form once only and here. |
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