luaur-code-gen 0.1.3

Native (A64/X64) code generation for Luau (Rust).
Documentation 
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use crate::functions::same_underlying_register::same_underlying_register;
use crate::records::ir_call_wrapper_x_64::IrCallWrapperX64;
use crate::records::register_x_64::RegisterX64;

impl IrCallWrapperX64 {
    pub fn rename_register(
        &mut self,
        target: &mut RegisterX64,
        reg: RegisterX64,
        replacement: RegisterX64,
    ) {
        if same_underlying_register(*target, reg) {
            self.add_register_use(replacement);
            self.remove_register_use(*target);

            // Only change index, size is preserved
            let replacement_index = replacement.index();
            *target = RegisterX64 {
                bits: (target.bits & RegisterX64::SIZE_MASK)
                    | (replacement_index << RegisterX64::INDEX_SHIFT),
            };
        }
    }
}