[Bug tree-optimization/116481] [12/13/14/15 Regression] `arrays of functions are not meaningful` error message happens with -W -Wall -O2 even though there are no arrays of function types used

[bruno at clisp dot org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=116481

--- Comment #4 from Bruno Haible <bruno at clisp dot org> ---
(In reply to Andrew Pinski from comment #3)
> The error message happens on x86_64 also.

Indeed.

> Note I think this code is undefined really unless you use the volatile.

Why? This code is accessing read-only memory near the address of the 'tramp'
function. Why would it need 'volatile' when doing so? (I don't claim that this
is portable ISO C code; it's  doing a low-level thing. But C is meant to be
used for low-level things.)