[Bug tree-optimization/78529] [7 Regression] gcc.c-torture/execute/builtins/strcat-chk.c failed with lto/O2

[jgreenhalgh at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78529

--- Comment #27 from James Greenhalgh <jgreenhalgh at gcc dot gnu.org> ---
(In reply to Jim Wilson from comment #26)
> I can reproduce the problem with this new reduced testcase.  I don't have
> knowledge of all of the details how the gcc implementation of LTO works, but
> my understanding goes something like this.

That fits with my understanding of this test failure when I looked at it in
December.