* Put TargetIsa's emit_inst under a "testing_hooks" feature.
In practice, TargetIsa's emit_inst pulls in its own instantiation
of the target-specifi `emit_inst` functions, which can be quite
large, and LTO doesn't eliminate them because they're held live
by TargetIsa's vtable.
Fortunately, this function is only used by tests, so we can put
it behind a feature flag.
Fixes#530.
* Add comments for `emit_inst` to clarify its purpose.
It appears that having the meta directory crate be inside the codegen
directory is not enough to allow codegen to depend on it without it
being published. So, let's just publish it.
* Added initial Rust codegen-meta implementation.
* Replace 'Cretonne' in comments.
* Prevent iterator overflow.
* 1.25.0 compatibility changes.
* Implemented debug traits for type variants.
* Added consistent comments.
* Cleaned up a loop via clippy fix.
* Added new license to codegen-meta Cargo.toml
* Edited lane type iterator `next` method.
* Removed functions that are not needed in Rust, and edited desc.
* Debug trait derived for valuetype.
* Added comments for iterator types in the base types submodule.
* Numbering is now handled in the cdsl/types.rs file.
* Moved type number logic into cdsl/types.
* Repeating the lane change cleanup.
* Removed codegen-meta crate from codegen deps.
* Typo fix.
* Addressing a patch note.
* Addressing patch note.
* Lowercase in vector names.
* Fixing a comment bug.
* Added a copy of the license file.
* Formatting changes.
* Cleaned up the vector type numbering.
* 1.25 compatibility.
* Fixed pattern match arms.
This switches from a custom list of architectures to use the
target-lexicon crate.
- "set is_64bit=1; isa x86" is replaced with "target x86_64", and
similar for other architectures, and the `is_64bit` flag is removed
entirely.
- The `is_compressed` flag is removed too; it's no longer being used to
control REX prefixes on x86-64, ARM and Thumb are separate
architectures in target-lexicon, and we can figure out how to
select RISC-V compressed encodings when we're ready.
