[Bug middle-end/65947] Vectorizer misses conditional assignment of constant

[alahay01 at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65947

--- Comment #5 from alahay01 at gcc dot gnu.org ---
Author: alahay01
Date: Fri Oct 23 12:40:33 2015
New Revision: 229245

URL: https://gcc.gnu.org/viewcvs?rev=229245&root=gcc&view=rev
Log:
Support for vectorizing conditional expressions

2015-10-23  Alan Hayward <alan.hayw...@arm.com>

gcc/
        PR tree-optimization/65947
        * tree-vect-loop.c
        (vect_is_simple_reduction_1): Find condition reductions.
        (vect_model_reduction_cost): Add condition reduction costs.
        (get_initial_def_for_reduction): Add condition reduction initial var.
        (vect_create_epilog_for_reduction): Add condition reduction epilog.
        (vectorizable_reduction): Condition reduction support.
        * tree-vect-stmts.c (vectorizable_condition): Add vect reduction arg
        * doc/sourcebuild.texi (Vector-specific attributes): Document
        vect_max_reduc

gcc/testsuite
        PR tree-optimization/65947
        * lib/target-supports.exp
        (check_effective_target_vect_max_reduc): Add.
        * gcc.dg/vect/pr65947-1.c: New test.
        * gcc.dg/vect/pr65947-2.c: New test.
        * gcc.dg/vect/pr65947-3.c: New test.
        * gcc.dg/vect/pr65947-4.c: New test.
        * gcc.dg/vect/pr65947-5.c: New test.
        * gcc.dg/vect/pr65947-6.c: New test.
        * gcc.dg/vect/pr65947-7.c: New test.
        * gcc.dg/vect/pr65947-8.c: New test.
        * gcc.dg/vect/pr65947-9.c: New test.
        * gcc.dg/vect/pr65947-10.c: New test.
        * gcc.dg/vect/pr65947-11.c: New test.


Added:
    trunk/gcc/testsuite/gcc.dg/vect/pr65947-1.c
    trunk/gcc/testsuite/gcc.dg/vect/pr65947-10.c
    trunk/gcc/testsuite/gcc.dg/vect/pr65947-11.c
    trunk/gcc/testsuite/gcc.dg/vect/pr65947-2.c
    trunk/gcc/testsuite/gcc.dg/vect/pr65947-3.c
    trunk/gcc/testsuite/gcc.dg/vect/pr65947-4.c
    trunk/gcc/testsuite/gcc.dg/vect/pr65947-5.c
    trunk/gcc/testsuite/gcc.dg/vect/pr65947-6.c
    trunk/gcc/testsuite/gcc.dg/vect/pr65947-7.c
    trunk/gcc/testsuite/gcc.dg/vect/pr65947-8.c
    trunk/gcc/testsuite/gcc.dg/vect/pr65947-9.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/doc/sourcebuild.texi
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/testsuite/lib/target-supports.exp
    trunk/gcc/tree-vect-loop.c
    trunk/gcc/tree-vect-stmts.c
    trunk/gcc/tree-vectorizer.h