[Bug tree-optimization/71901] [7 Regression] ice in find_or_generate_expression

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71901

--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Tue Jul 19 10:19:46 2016
New Revision: 238468

URL: https://gcc.gnu.org/viewcvs?rev=238468&root=gcc&view=rev
Log:
2016-07-19  Richard Biener  <rguent...@suse.de>

        PR tree-optimization/71901
        * tree-ssa-sccvn.h (struct vn_reference_op_struct): Add
        align member, group stuff with the bitfield.
        (vn_ref_op_align_unit): New inline.
        * tree-ssa-sccvn.c (copy_reference_ops_from_ref): For ARRAY_REFs
        record element alignment and operand 3 unchanged.
        (ao_ref_init_from_vn_reference): Adjust.
        (valueize_refs_1): Likewise.
        * tree-ssa-pre.c (create_component_ref_by_pieces_1): Likewise.

        * gcc.dg/torture/pr71901.c: New testcase.

Added:
    trunk/gcc/testsuite/gcc.dg/torture/pr71901.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-ssa-pre.c
    trunk/gcc/tree-ssa-sccvn.c
    trunk/gcc/tree-ssa-sccvn.h