[Bug testsuite/91821] [10 regression] r275928 breaks gcc.target/powerpc/sad-vectorize-2.c

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91821

--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Fri Sep 20 09:54:54 2019
New Revision: 275996

URL: https://gcc.gnu.org/viewcvs?rev=275996&root=gcc&view=rev
Log:
2019-09-20  Richard Biener  <rguent...@suse.de>

        PR tree-optimization/91821
        * tree-vect-loop.c (check_reduction_path): Check we can compute
        reduc_idx.
        (vect_is_simple_reduction): Set STMT_VINFO_REDUC_IDX.
        * tree-vect-patterns.c (vect_reassociating_reduction_p): Return
        operands in canonical order.
        * tree-vectorizer.c (vec_info::new_stmt_vec_info): Initialize
        STMT_VINFO_REDUC_IDX.
        * tree-vectorizer.h (_stmt_vec_info::reduc_idx): New.
        (STMT_VINFO_REDUC_IDX): Likewise.

Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/tree-vect-loop.c
    trunk/gcc/tree-vect-patterns.c
    trunk/gcc/tree-vectorizer.c
    trunk/gcc/tree-vectorizer.h