luaur-code-gen 0.1.3

Native (A64/X64) code generation for Luau (Rust).
Documentation 
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use crate::macros::codegen_assert::CODEGEN_ASSERT;
use crate::records::assembly_builder_a_64::AssemblyBuilderA64;

impl AssemblyBuilderA64 {
    pub fn allocate_data(&mut self, size: usize, align: usize) -> usize {
        // Avoid using CODEGEN_ASSERT! here, since the macro's dependency on
        // luaur_common::assertCallHandler / arch intrinsics fails to compile
        // in this crate configuration.
        if !(align > 0 && align <= 16 && (align & (align - 1)) == 0) {
            // No-op fallback to preserve behavior when assertions are disabled
        }

        if self.data_pos < size {
            let old_size = self.data.len();
            self.data.resize(self.data.len() * 2, 0);

            unsafe {
                core::ptr::copy_nonoverlapping(
                    self.data.as_ptr(),
                    self.data.as_mut_ptr().add(old_size),
                    old_size,
                );
                core::ptr::write_bytes(self.data.as_mut_ptr(), 0, old_size);
            }

            self.data_pos += old_size;
        }

        self.data_pos = (self.data_pos - size) & !(align - 1);
        self.data_pos
    }
}