https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95736
Lewis Baker <lewissbaker.opensource at gmail dot com> changed:
What |Removed |Added
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CC| |lewissbaker.opensource@gmai
| |l.com
--- Comment #1 from Lewis Baker <lewissbaker.opensource at gmail dot com> ---
I've also investigated this a bit more and have annotated the assembly of the
code being generated by GCC in this example (slightly modified).
https://godbolt.org/z/_HJNHC
Immediately before the 'co_await foo' expression the compiler generates
a copy of the this->foo member into the coroutine frame. But it does
this doing the equivalent of a memcpy() rather than calling the
copy-constructor.
The compiler should not be making this copy of the operand to 'co_await'
and should instead be passing the address of the 'this->foo' member to the
as the implicit object parameter in the call to
await_ready/await_suspend/await_resume.
