[PATCH] [Reassociate] Add initial support for vector instructions.

[Robert Lougher]

Hi Chad,

Sorry for the delay.  I have ran SPEC CPU 2006 and open-source Bullet.  Unfortunately, I found no performance difference at all.  Sanjay also tried the n-body sim from https://github.com/tycho/nbody and didn't see any perf difference either.  Apart from micro-benchmarks, the only consistent speed-up I see is in an internal benchmark of ~1%.  I didn't see any performance regressions during testing.


http://reviews.llvm.org/D7566

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