Instead of using an integer literal use constexpr popcount
function instead.
The misalignment causes an incorrect generation of a call
to a shared write barrier stub for the last allocatable register
on ARM64.
Reported by Lin Zuojian <zuojian.lzj@alibaba-inc.com>
TEST=ci
Change-Id: I69ce32da958573be0ec8967e462f8a378a778a28
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/254401
Commit-Queue: Slava Egorov <vegorov@google.com>
Reviewed-by: Ryan Macnak <rmacnak@google.com>
Vyacheslav Egorov
afb34fb9e3