[Bug tree-optimization/91221] [10 Regression] ICE in get_int_cst_ext_nunits, at tree.c:1299 since r273548

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91221

--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Mon Jul 22 11:18:55 2019
New Revision: 273667

URL: https://gcc.gnu.org/viewcvs?rev=273667&root=gcc&view=rev
Log:
2019-07-22  Richard Biener  <rguent...@suse.de>

        PR tree-optimization/91221
        * tree-ssa-sccvn.c (vn_reference_lookup_3): Appropriately
        restrict partial-def handling of empty constructors and
        memset to refs with known offset.

        * g++.dg/pr91221.C: New testcase.

Added:
    trunk/gcc/testsuite/g++.dg/pr91221.C
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-ssa-sccvn.c