f877141668
We've adopted this pattern in Cranelift's instruction definitions where we let-bind some calls to `Operand::new` and then later use them in one or more calls to `Inst::new`. That pattern has two problems: - It puts the type of each operand somewhere potentially far removed from the instruction in which it's used. - We let-bind the same name for many different operands, compounding the first problem by making it harder to find _which_ definition is used. So instead this commit removes all let-bindings for operand definitions and constructs a new `Operand` every time. Constructing an `Operand` at every use means we duplicate some documentation strings, but not all that many of them as it turns out. I've left the let-bound type-sets alone, so those are currently still shared across many instructions. They have some of the same problems and should be reviewed as well.
This crate contains the metaprogram used by cranelift-codegen. It's not useful on its own.