[Bug tree-optimization/85692] Two source permute not used for vector initialization

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85692

--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Fri May 11 07:38:49 2018
New Revision: 260155

URL: https://gcc.gnu.org/viewcvs?rev=260155&root=gcc&view=rev
Log:
        PR tree-optimization/85692
        * tree-ssa-forwprop.c (simplify_vector_constructor): Try two
        source permute as well.

        * gcc.target/i386/pr85692.c: New test.

Added:
    trunk/gcc/testsuite/gcc.target/i386/pr85692.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-ssa-forwprop.c