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A register class can appear as a leaf TreePatternNode with and without a name: (COPY_TO_REGCLASS GPR:$src, F8RC) In a named leaf node like GPR:$src, the register class provides type information for the named variable represented by the node. The TypeSet for such a node is the set of value types that the register class can represent. In an unnamed leaf node like F8RC above, the register class represents itself as a kind of immediate. Such a node has the type MVT::i32, we'll never create a virtual register representing it. This change makes it possible to remove the special handling of COPY_TO_REGCLASS in CodeGenDAGPatterns.cpp. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@177825 91177308-0d34-0410-b5e6-96231b3b80d8
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