[PATCH] vect: Use LOOP_VINFO_DATAREFS and LOOP_VINFO_DDRS consistently

[Yangfei (Felix)]

Hi,

This is minor code refactorings in tree-vect-data-refs.c and tree-vect-loop.c.
Use LOOP_VINFO_DATAREFS and LOOP_VINFO_DDRS when possible and rename
several parameters to make code more consistent.

Bootstrapped and tested on aarch64-linux-gnu.  OK?

Thanks,
Felix

gcc/

+2020-06-13  Felix Yang  <felix.yang@huawei.com>
+
+       * tree-vect-data-refs.c (vect_verify_datarefs_alignment): Rename
+       parameter to loop_vinfo and update uses.  Use LOOP_VINFO_DATAREFS
+       when possible.
+       (vect_analyze_data_refs_alignment): Likewise, and use LOOP_VINFO_DDRS
+       when possible.
+       * tree-vect-loop.c (vect_dissolve_slp_only_groups): Use
+       LOOP_VINFO_DATAREFS when possible.
+       (update_epilogue_loop_vinfo): Likewise.
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