[X86] Add more instructions to the memory folding tables using the autogenerated table as a guide.

I think this covers most of the unmasked vector instructions. We're still missing a lot of the masked instructions.

There are some test changes here because of the new folding support. I don't think these particular cases should be folded because it creates an undef register dependency. I think the changes introduced in r334175 are not handling stack folding. They're only blocking the peephole pass.

llvm-svn: 334800

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