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I want to be able to extract and concatenate bits that make up different llvm::Value's. For example, I want to be able to extract 5 bits from offset 3 from a i32, or to concatenate bits of i5 and i3 to get i8. What is the best way to do this? I tried to use pointers and vectors, but vectors only work with same-sized structures (so no way to put an i5 and i3 inside the same vector) and pointer arithmetic can only be performed with respect to bytes.

Alex Babushkin
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    Your best option will probably be to generate a sequence of and, shift and or operations. That's what the CPU will do at the end of the compilation pipeline anyway. – arnt Oct 24 '22 at 13:42

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