72b7a4b3ef
`iter()` iterates over both keys and values, while `values()` iterates over just values. Also add `_mut()` versions. These replace the otherwise common idiom of iterating with `keys()` and using indexing to get the values, allowing for simpler code.
This crate provides a straightforward way to create a
Cretonne IR function and fill it with
instructions translated from another language. It contains an SSA construction
module that provides convenient methods for translating non-SSA variables into
SSA Cretonne IR values via use_var and def_var calls.