[Bug tree-optimization/85826] [9 Regression] ICE in gimple-ssa-warn-restrict on a variable-length struct starting with r260280

[msebor at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85826

--- Comment #2 from Martin Sebor <msebor at gcc dot gnu.org> ---
Author: msebor
Date: Tue May 22 15:22:16 2018
New Revision: 260537

URL: https://gcc.gnu.org/viewcvs?rev=260537&root=gcc&view=rev
Log:
PR tree-optimization/85826 - ICE in gimple-ssa-warn-restruct on
   a variable-length struct

gcc/ChangeLog:

        PR tree-optimization/85826
        * gimple-ssa-warn-restrict.c (builtin_memref::builtin_memref): Avoid
        assuming that a DECL necesarily has a constant size.

gcc/testsuite/ChangeLog:

        PR tree-optimization/85826
        * gcc.dg/Wrestrict-17.c: New test.


Added:
    trunk/gcc/testsuite/gcc.dg/Wrestrict-17.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/gimple-ssa-warn-restrict.c
    trunk/gcc/testsuite/ChangeLog