[Bug tree-optimization/64530] [4.9 Regression] Incorrect calculation when assigning to array with -O3

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64530

--- Comment #8 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Fri Feb 20 07:32:08 2015
New Revision: 220835

URL: https://gcc.gnu.org/viewcvs?rev=220835&root=gcc&view=rev
Log:
2015-02-20  Richard Biener  <rguenther@suse.de>

    Backport from mainline
    2015-01-12  Richard Biener  <rguenther@suse.de>

    PR tree-optimization/64530
    * tree-loop-distribution.c (pg_add_dependence_edges): Shuffle
    back dr1.

    * gfortran.dg/pr64530.f90: New testcase.

    2015-02-13  Richard Biener  <rguenther@suse.de>

    PR lto/64373
    * lto-streamer-out.c (tree_is_indexable): Guard for NULL
    DECL_CONTEXT.

    * gcc.dg/lto/pr64373_0.c: New testcase.

    2015-02-16  Richard Biener  <rguenther@suse.de>

    PR tree-optimization/63593
    * tree-predcom.c (execute_pred_commoning_chain): Delay removing
    stmts and releasing SSA names until...
    (execute_pred_commoning): ... after processing all chains.

    * gcc.dg/pr63593.c: New testcase.

    2015-02-18  Richard Biener  <rguenther@suse.de>

    PR tree-optimization/65063
    * tree-predcom.c (determine_unroll_factor): Return 1 if we
    have replaced looparound PHIs.

    * gcc.dg/pr65063.c: New testcase.

Added:
    branches/gcc-4_9-branch/gcc/testsuite/gcc.dg/lto/pr64373_0.c
    branches/gcc-4_9-branch/gcc/testsuite/gcc.dg/pr63593.c
    branches/gcc-4_9-branch/gcc/testsuite/gcc.dg/pr65063.c
    branches/gcc-4_9-branch/gcc/testsuite/gfortran.dg/pr64530.f90
Modified:
    branches/gcc-4_9-branch/gcc/ChangeLog
    branches/gcc-4_9-branch/gcc/lto-streamer-out.c
    branches/gcc-4_9-branch/gcc/testsuite/ChangeLog
    branches/gcc-4_9-branch/gcc/tree-loop-distribution.c
    branches/gcc-4_9-branch/gcc/tree-predcom.c