Snapshot gcc-12-20210606 is now available on
  https://gcc.gnu.org/pub/gcc/snapshots/12-20210606/
and on various mirrors, see http://gcc.gnu.org/mirrors.html for details.

This snapshot has been generated from the GCC 12 git branch
with the following options: git://gcc.gnu.org/git/gcc.git branch master revision fed94fc9e704b0de228499495b7ca4d4c79ef76b

You'll find:

 gcc-12-20210606.tar.xz               Complete GCC

  SHA256=719def4786a24bf1e528e859c0bd8c7d0cfde4d0f9fe976d4d535a288a6aa54e
  SHA1=81498bc41255b4808b2fe1cfa7e283a52b05f112

Diffs from 12-20210530 are available in the diffs/ subdirectory.

When a particular snapshot is ready for public consumption the LATEST-12
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.