Comment 27 for bug 836588

I think it would be better to just generate a single insn early on and then to split it once the loop optimizers have had a chance to run. Then the optimizers should be able to throw the whole expression away if it's not needed and hoist it as a whole if it's inside a loop.

Splitting it before sched1 would be ideal, but the split could be delayed until after reload if necessary.