[Bug c/69624] sanitize-coverage=trace-pc miscompiles kernel

[jirislaby at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69624

--- Comment #12 from Jiri Slaby <jirislaby at gmail dot com> ---
(In reply to Jiri Slaby from comment #11)
> __sw_hweight32 changes only retval (rax) and parameter (rdi).

... and rdi is stored to and restored from stack.