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Dan Gohman
6595635175
Introduce new SelectionDAG node opcodes VEXTRACT_SUBVECTOR and
VCONCAT_VECTORS. Use these for CopyToReg and CopyFromReg legalizing in the case that the full register is to be split into subvectors instead of scalars. This replaces uses of VBIT_CONVERT to present values as vector-of-vector types in order to make whole subvectors accessible via BUILD_VECTOR and EXTRACT_VECTOR_ELT. This is in preparation for adding extended ValueType values, where having vector-of-vector types is undesirable. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37569 91177308-0d34-0410-b5e6-96231b3b80d8
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