352ee2b186
This also fixes a bug where `movsd` was incorrectly used with a memory operand for `insertlane`, causing it to actually zero the upper bits instead of preserving them. Note that the insertlane logic still exists in `lower.rs` because it's used as a helper for a few other instruction lowerings which aren't migrated to ISLE yet. This commit also adds a helper in ISLE itself for those other lowerings to use when they get implemented. Closes #3216
This crate contains the core Cranelift code generator. It translates code from an intermediate representation into executable machine code.