https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105090
--- Comment #9 from Richard Earnshaw <rearnsha at gcc dot gnu.org> --- It looks like the compiler now merges b into a rather than a into b. The result is the same, though and we don't need an lsr this way. Technically it ought to be better. But we do end up in a dance with the registers this way at present. I suspect it's due to not splitting DFmode regs as aggressively as we do DImode and then ending up trying to re-form them later on for register allocation purposes. Anyway, I don't think the lsr is essential to the test, so lets just remove that from the test.
