Snapshot gcc-9-20210930 is now available on
  https://gcc.gnu.org/pub/gcc/snapshots/9-20210930/
and on various mirrors, see http://gcc.gnu.org/mirrors.html for details.

This snapshot has been generated from the GCC 9 git branch
with the following options: git://gcc.gnu.org/git/gcc.git branch releases/gcc-9 revision e3ad4c45d128c1f4a69f86116a36312aa593554c

You'll find:

 gcc-9-20210930.tar.xz                Complete GCC

  SHA256=50dfe2b19ca7c20a518496ade91d2a36f5421639bf4afa3e6cf4c4981b0a791b
  SHA1=e5e2024741df4adfd66919becb58a85f14165850

Diffs from 9-20210923 are available in the diffs/ subdirectory.

When a particular snapshot is ready for public consumption the LATEST-9
link is updated and a message is sent to the gcc list.  Please do not use
a snapshot before it has been announced that way.