[Bug tree-optimization/84417] [8 Regression] internal compiler error: verify_gimple failed

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84417

--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Fri Feb 16 12:01:23 2018
New Revision: 257731

URL: https://gcc.gnu.org/viewcvs?rev=257731&root=gcc&view=rev
Log:
2018-02-16  Richard Biener  <rguent...@suse.de>

        PR tree-optimization/84417
        * tree-ssa.c (non_rewritable_mem_ref_base): Properly constrain
        the MEM_REF offset when conversion to BIT_FIELD_REF is desired.
        (non_rewritable_lvalue_p): Likewise, use poly-ints.

        * gcc.dg/torture/pr84417.c: New testcase.

Added:
    trunk/gcc/testsuite/gcc.dg/torture/pr84417.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-ssa.c