[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 #10 from Eric Botcazou <ebotcazou at gcc dot gnu.org> 2011-12-08 09:05:42 UTC ---
Author: ebotcazou
Date: Thu Dec  8 09:05:38 2011
New Revision: 182102

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=182102
Log:
    PR tree-optimization/51315
    * tree.h (get_object_or_type_alignment): Declare.
    * expr.c (get_object_or_type_alignment): Move to...
    * builtins.c (get_object_or_type_alignment): ...here.  Add assertion.
    * 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.

Added:
    trunk/gcc/testsuite/gcc.c-torture/execute/20111208-1.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/builtins.c
    trunk/gcc/expr.c
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-sra.c
    trunk/gcc/tree.h