[PATCH] AArch64: Use CMP;CCMP sequences for and/or/setcc trees.

[Charlie Turner]

Hi Matthias,

| I can't reproduce any regressions on our hardware. I've been using the lnt
+ llvm-testsuite to run the benchmark. I only see 1.7% noise:

The lnt + llvm-testsuite runs the spec2006 benchmark in only test and train
modes by default, not ref. It is in ref where the miscompare happens.

Regards,
Charlie.