Adjusted my 64-bit shifts patch to address Richard Earnshaw's concerns, tested it, and posted the new one upstream.
Continued trying to figure out how ira-costs.c works, and in particular, why it doesn't choose to do 64-bit stuff in NEON when I think it should. Basically, the problem seems to be that when hard regs are *already* assigned, prior to IRA (say because they are function parameters or return values), then the allocator does not even consider the possibility of moving that value to another register unless it absolutely has to. It will merrily choose the worst possible option just because it's the easiest decision.
Merged FSF GCC 4.5 into Linaro GCC 4.5. Likewise for 4.6. Pushed the branches to Launchpad for testing. The 4.5 testing did not come back totally clear, so this may delay the release a little. Hmmm.
Updated my FSF GCC 4.7 checkout and rebuilt it. This time the build succeeded, so I've used it as the basis for a shiny new launchpad branch "lp:gcc-linaro/4.7". I've created the release series to go with it.
Applied my new 64-bit shifts patch to the new GCC 4.7 Linaro branch and submitted a merge request. This is mostly for the purposes of getting the test results at this point.