[Bug tree-optimization/56118] Piecewise vector / complex initialization from constants not combined

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=56118

--- Comment #8 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Mon Nov  9 12:59:17 2015
New Revision: 230020

URL: https://gcc.gnu.org/viewcvs?rev=230020&root=gcc&view=rev
Log:
2015-11-09  Richard Biener  <rguenther@suse.de>

        PR tree-optimization/56118
        * tree-vectorizer.h (vect_find_last_scalar_stmt_in_slp): Declare.
        * tree-vect-slp.c (vect_find_last_scalar_stmt_in_slp): Export.
        * tree-vect-data-refs.c (vect_slp_analyze_node_dependences): New
        function.
        (vect_slp_analyze_data_ref_dependences): Instead of computing
        all dependences of the region DRs just analyze the code motions
        SLP vectorization will perform.  Remove SLP instances that
        cannot have their store/load motions applied.
        (vect_analyze_data_refs): Allow DRs without a vectype
        in BB vectorization.

        * gcc.dg/vect/no-tree-sra-bb-slp-pr50730.c: Adjust.

Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/testsuite/gcc.dg/vect/no-tree-sra-bb-slp-pr50730.c
    trunk/gcc/tree-vect-data-refs.c
    trunk/gcc/tree-vect-slp.c
    trunk/gcc/tree-vectorizer.h