Required for gcc-4.4.3-r2 to go stable. The test suite is long and intensive. It takes me about six hours on a Core2, so you might want to set aside a day for it.
Testing on x86:
I went through the testsuite once.
All tests passed, all useflags good.
Looks good to go stable to me.
x86 stable, thanks Thomas
Stable on amd64
Stable for HPPA.