luaur-code-gen 0.1.0

Native (A64/X64) code generation for Luau (Rust).
Documentation 
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use crate::macros::codegen_assert::CODEGEN_ASSERT;
use crate::records::ir_reg_alloc_a_64::IrRegAllocA64;
use crate::records::register_a_64::RegisterA64;

impl IrRegAllocA64 {
    pub fn take_reg(&mut self, reg: RegisterA64, index: u32) -> RegisterA64 {
        let set = self.get_set(reg.kind());

        CODEGEN_ASSERT!((set.free & (1u32 << reg.index())) != 0);
        CODEGEN_ASSERT!(set.defs[reg.index() as usize] == IrRegAllocA64::kInvalidInstIdx);

        set.free &= !(1u32 << reg.index());
        set.defs[reg.index() as usize] = index;

        reg
    }
}