[Bug tree-optimization/51315] [4.6/4.7 regression] unaligned memory accesses generated with -ftree-sra

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

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51315

--- Comment #11 from Eric Botcazou <ebotcazou at gcc dot gnu.org> 2011-12-08 09:12:15 UTC ---
Author: ebotcazou
Date: Thu Dec  8 09:12:12 2011
New Revision: 182103

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=182103
Log:
    PR tree-optimization/51315
    * tree-sra.c (tree_non_mode_aligned_mem_p): Rename to...
    (tree_non_aligned_mem_p): ...this.  Add ALIGN parameter.  Look into
    MEM_REFs and use get_object_or_type_alignment for them.
    (build_accesses_from_assign): Adjust for above change.
    (access_precludes_ipa_sra_p): Likewise.
ada/
    Backport from mainline
    2011-09-25  Eric Botcazou  <ebotcazou@adacore.com>

    * gcc-interface/decl.c (gnat_to_gnu_entity) <object>: Do not promote
    the alignment if this doesn't prevent BLKmode access to the object.

Added:
    branches/gcc-4_6-branch/gcc/testsuite/gcc.c-torture/execute/20111208-1.c
      - copied unchanged from r182102,
trunk/gcc/testsuite/gcc.c-torture/execute/20111208-1.c
    branches/gcc-4_6-branch/gcc/testsuite/gnat.dg/frame_overflow.ads
      - copied unchanged from r182090,
trunk/gcc/testsuite/gnat.dg/frame_overflow.ads
Modified:
    branches/gcc-4_6-branch/gcc/ChangeLog
    branches/gcc-4_6-branch/gcc/ada/ChangeLog
    branches/gcc-4_6-branch/gcc/ada/gcc-interface/decl.c
    branches/gcc-4_6-branch/gcc/testsuite/ChangeLog
    branches/gcc-4_6-branch/gcc/testsuite/gnat.dg/frame_overflow.adb
    branches/gcc-4_6-branch/gcc/testsuite/gnat.dg/specs/addr1.ads
    branches/gcc-4_6-branch/gcc/tree-sra.c