[Bug tree-optimization/68892] [6 Regression] Excessive dead loads produced by BB vectorization

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68892

--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Wed Dec 16 09:21:04 2015
New Revision: 231674

URL: https://gcc.gnu.org/viewcvs?rev=231674&root=gcc&view=rev
Log:
2015-12-16  Richard Biener  <rguent...@suse.de>

        PR tree-optimization/68892
        * tree-vect-slp.c (vect_analyze_slp_cost_1): Properly compute
        cost for permuted loads.

        * gcc.dg/vect/bb-slp-pr68892.c: New testcase.

Added:
    trunk/gcc/testsuite/gcc.dg/vect/bb-slp-pr68892.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-vect-slp.c