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This fixes vectorized PHI latch edge updating and delay it until all of the loop is code generated to deal with the case that the latch def is a PHI in the same block. 2020-08-26 Richard Biener <rguenther@suse.de> PR tree-optimization/96698 * tree-vectorizer.h (loop_vec_info::reduc_latch_defs): New. (loop_vec_info::reduc_latch_slp_defs): Likewise. * tree-vect-stmts.c (vect_transform_stmt): Only record stmts to update PHI latches from, perform the update ... * tree-vect-loop.c (vect_transform_loop): ... here after vectorizing those PHIs. (info_for_reduction): Properly handle non-reduction PHIs. * gcc.dg/vect/pr96698.c: New testcase. |
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