[PATCH] [mips][msa] Implemented build_vector.

[Daniel Sanders]

Hi,

This patch implements support for ISD::BUILD_VECTOR to MIPS MSA. As part of this, it makes a small addition to the target-independent code. It adds BuildVectorSDNode::isSplat() which returns true if the BuildVectorSDNode can be trivially determined to be a (possibly non-constant) splat.

Daniel Sanders
Leading Software Design Engineer, MIPS Processor IP
Imagination Technologies Limited
www.imgtec.com<http://www.imgtec.com/>

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