[Bug c++/104177] coroutine frame is not being allocated with the correct alignment

[davidledger at live dot com.au via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104177

--- Comment #16 from David Ledger <davidledger at live dot com.au> ---
The above example produces the xmm instruction on a clearly misaligned value.

I was searching the assembly using:
```SH
#!/bin/bash

g++-11 main.cpp -std=c++2a -O3 -march=native -S
grep -E "vmovdqu\s%xmm0,\s3\+_ZL6buffer" main.s
exit $?
```