[Bug tree-optimization/91126] [7/8/9 regression] Incorrect constant propagation of BIT_FIELD_REF

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91126

--- Comment #9 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Wed Jul 10 13:40:12 2019
New Revision: 273355

URL: https://gcc.gnu.org/viewcvs?rev=273355&root=gcc&view=rev
Log:
2019-07-10  Richard Biener  <rguent...@suse.de>

        PR tree-optimization/91126
        * tree-ssa-sccvn.c (n_walk_cb_data::push_partial_def): Adjust
        native encoding offset for BYTES_BIG_ENDIAN.
        (vn_reference_lookup_3): Likewise.

        * gcc.dg/torture/pr91126.c: New testcase.

Added:
    trunk/gcc/testsuite/gcc.dg/torture/pr91126.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-ssa-sccvn.c