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In the Baldrdash (SpiderMonkey) embedding, we must take care to zero-extend all function arguments to callees in integer registers when the types are narrower than 64 bits. This is because, unlike the native SysV ABI, the Baldrdash ABI expects high bits to be cleared. Not doing so leads to difficult-to-trace errors where high bits falsely tag an int32 as e.g. an object pointer, leading to potential security issues.
This crate contains the core Cranelift code generator. It translates code from an intermediate representation into executable machine code.