[Bug tree-optimization/77621] [6 Regression] Internal compiler error for mtune=atom + msse2

["uros at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77621

--- Comment #22 from uros at gcc dot gnu.org ---
Author: uros
Date: Sun Sep 25 17:07:37 2016
New Revision: 240475

URL: https://gcc.gnu.org/viewcvs?rev=240475&root=gcc&view=rev
Log:
        Backport from mainline
        2016-09-21  Richard Biener  <rguenther@suse.de>
                    Jakub Jelinek  <jakub@redhat.com>

        PR tree-optimization/77621
        * tree-vect-data-refs.c (vect_analyze_data_ref_accesses): Split
        group at non-vectorizable stmts.

        Backport from mainline
        2016-09-20  Uros Bizjak  <ubizjak@gmail.com>

        PR target/77621
        * config/i386/i386.c (ix86_preferred_simd_mode) <case DFmode>:
        Don't return word_mode for !TARGET_VECTORIZE_DOUBLE.
        (ix86_add_stmt_cost): Penalize DFmode vector operations
        for !TARGET_VECTORIZE_DOUBLE.

testsuite/ChangeLog:

        Backport from mainline
        2016-09-21  Richard Biener  <rguenther@suse.de>
                    Jakub Jelinek  <jakub@redhat.com>

        PR tree-optimization/77621
        * gcc.dg/pr77621.c: New testcase.

        Backport from mainline
        2016-09-20  Uros Bizjak  <ubizjak@gmail.com>

        PR target/77621
        * gcc.target/i386/pr77621.c: New test.
        * gcc.target/i386/vect-double-2.c: Update scan-tree-dump-times
        pattern, loop should vectorize with -mtune=atom.


Added:
    branches/gcc-6-branch/gcc/testsuite/gcc.dg/pr77621.c
    branches/gcc-6-branch/gcc/testsuite/gcc.target/i386/pr77621.c
Modified:
    branches/gcc-6-branch/gcc/ChangeLog
    branches/gcc-6-branch/gcc/config/i386/i386.c
    branches/gcc-6-branch/gcc/testsuite/ChangeLog
    branches/gcc-6-branch/gcc/testsuite/gcc.target/i386/vect-double-2.c
    branches/gcc-6-branch/gcc/tree-vect-data-refs.c