[Bug middle-end/83215] C++: struct with char-array assumed to alias with everything

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83215

--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Tue Nov 20 09:31:06 2018
New Revision: 266305

URL: https://gcc.gnu.org/viewcvs?rev=266305&root=gcc&view=rev
Log:
2018-11-20  Richard Biener  <rguent...@suse.de>

        PR middle-end/83215
        * alias.c (component_uses_parent_alias_set_from): Remove
        alias-set zero and TYPE_TYPELESS_STORAGE case both already
        handled in other ways.

        * g++.dg/tree-ssa/pr83215.C: New testcase.

Added:
    trunk/gcc/testsuite/g++.dg/tree-ssa/pr83215.C
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/alias.c
    trunk/gcc/testsuite/ChangeLog