[Bug middle-end/81657] [8 Regression] FAIL: gcc.dg/20050503-1.c scan-assembler-not call

[hjl.tools at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81657

--- Comment #21 from H.J. Lu <hjl.tools at gmail dot com> ---
(In reply to Martin Liška from comment #20)
> Ok, so the PR is still marked as P1, so we should probably focus on it.
> If I'm reading the discussion correctly, there's no consensus about what to
> do?

Please add a target hook to allow backend to keep tail call to mempcpy.