[X86] Reduce the number of isel pattern variations needed for VPTESTM/VPTESTNM matching.
Canonicalize EQ/NE PCMPM to have build vector all zeros on the RHS so we don't have to pattern match it in both locations. This significantly reduces the number of isel patterns needed since we also had to multiply it out with loads being in either operand of the 'and' input node and in the 'and' masking node.
This removes over 24000 bytes from the isel table.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@325526
91177308-0d34-0410-b5e6-
96231b3b80d8
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