c449d3ae28
For conditional reductions, the "then" value needs to be the candidate value calculated by this iteration while the "else" value needs to be the result carried over from previous iterations. If the COND_EXPR is the other way around, we need to swap it. 2019-09-19 Richard Sandiford <richard.sandiford@arm.com> gcc/ * tree-vectorizer.h (vectorizable_condition): Take an int reduction index instead of a boolean flag. * tree-vect-stmts.c (vectorizable_condition): Likewise. Swap the "then" and "else" values for EXTRACT_LAST_REDUCTION reductions if the reduction accumulator is the "then" rather than the "else" value. (vect_analyze_stmt): Update call accordingly. (vect_transform_stmt): Likewise. * tree-vect-loop.c (vectorizable_reduction): Likewise, asserting that the index is > 0. From-SVN: r275962 |
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