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This was added as an incremental step to improve AArch64 code quality in PR #2278. At the time, we did not have a way to pattern-match the load + splat opcode sequence that the relevant Wasm opcodes lowered to. However, now with PR #2366, we can merge effectful instructions such as loads into other ops, and so we can do this pattern matching directly. The pattern-matching update will come in a subsequent commit.
This crate contains the core Cranelift code generator. It translates code from an intermediate representation into executable machine code.