peepmatic: Introduce the peepmatic-runtime crate

The `peepmatic-runtime` crate contains everything required to use a
`peepmatic`-generated peephole optimizer.

In short: build times and code size.

If you are just using a peephole optimizer, you shouldn't need the functions
to construct it from scratch from the DSL (and the implied code size and
compilation time), let alone even build it at all. You should just
deserialize an already-built peephole optimizer, and then use it.

That's all that is contained here in this crate.

cranelift/peepmatic/crates/runtime/src/lib.rs

@@ -0,0 +1,34 @@
+//! Runtime support for `peepmatic`'s peephole optimizers.
+//!
+//! This crate contains everything required to use a `peepmatic`-generated
+//! peephole optimizer.
+//!
+//! ## Why is this a different crate from `peepmatic`?
+//!
+//! In short: build times and code size.
+//!
+//! If you are just using a peephole optimizer, you shouldn't need the functions
+//! to construct it from scratch from the DSL (and the implied code size and
+//! compilation time), let alone even build it at all. You should just
+//! deserialize an already-built peephole optimizer, and then use it.
+//!
+//! That's all that is contained here in this crate.
+
+#![deny(missing_docs)]
+#![deny(missing_debug_implementations)]
+
+pub mod cc;
+pub mod error;
+pub mod instruction_set;
+pub mod integer_interner;
+pub mod linear;
+pub mod operator;
+pub mod optimizations;
+pub mod optimizer;
+pub mod part;
+pub mod paths;
+pub mod r#type;
+
+pub use error::{Error, Result};
+pub use optimizations::PeepholeOptimizations;
+pub use optimizer::PeepholeOptimizer;