044b57f334
There were several issues with ISLE's existing error reporting implementation. - When using Miette for more readable error reports, it would panic if errors were reported from multiple files in the same run. - Miette is pretty heavy-weight for what we're doing, with a lot of dependencies. - The `Error::Errors` enum variant led to normalization steps in many places, to avoid using that variant to represent a single error. This commit: - replaces Miette with codespan-reporting - gets rid of a bunch of cargo-vet exemptions - replaces the `Error::Errors` variant with a new `Errors` type - removes source info from `Error` variants so they're easy to construct - adds source info only when formatting `Errors` - formats `Errors` with a custom `Debug` impl - shares common code between ISLE's callers, islec and cranelift-codegen - includes a source snippet even with fancy-errors disabled I tried to make this a series of smaller commits but I couldn't find any good split points; everything was too entangled with everything else.
ISLE: Instruction Selection / Lowering Expressions
ISLE is a domain specific language (DSL) for instruction selection and lowering
clif instructions to vcode's MachInsts in Cranelift.
ISLE is a statically-typed term-rewriting language. You define rewriting rules
that map input terms (clif instructions) into output terms (MachInsts). These
rules get compiled down into Rust source test that uses a tree of match
expressions that is as good or better than what you would have written by hand.