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...ed vector types as the log2 > of the > length, biased by one. Using only 6 bits gets us vector lengths up to > (2**64)-2, which Ought To Be Enough For Anyone. Yerk! This would throw a serious wrench in supporting non power of two vector lengths, which is needed by us. We needed to add v3f32 and v3i32 ValueTypes just to define our register file in the .td. -- Christopher Lamb -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20070622/f3ce0d40/attachment.html>

After doing a bunch of work for moving pre-legalize extended ValueTypes into a table in SelectionDAG, I may have just found a simpler approach. There are under 32 simple ValueType values, so we only really need 5 bits to represent those. ValueType is already a 32-bit type on most hosts; what if we make use of the remaining 27 bits instead of using an external table? If we can assume that vector