No functionality change.
Makes the code more compact (see the FMA part).
This needs a new type attribute MemOpFrag in X86VectorVTInfo. For now I only
defined this in the simple cases. See the commment before the attribute.
Diff of X86.td.expanded before and after is empty except for the appearance of
the new attribute.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@218637
91177308-0d34-0410-b5e6-
96231b3b80d8