#include <vm_lifters.hpp>

namespace vmp2::lifters
{
    // %t1 = %stack[%sp]
    // add %sp, 8
    // %vregX = %1
    lifter_callback_t sregq = [ & ]( vm::vmp_rtn_t *rtn, const vm::instrs::code_block_t &vm_code_block,
                                     const vm::instrs::virt_instr_t &vinstr, llvm::IRBuilder<> *ir_builder ) {
        auto old_sp =
            ir_builder->CreateLoad( llvm::IntegerType::get( *rtn->llvm_ctx, 64 ), rtn->stack_ptr, false, "old_sp" );

        auto new_sp = ir_builder->CreateSub(
            old_sp, llvm::ConstantInt::get( llvm::IntegerType::get( *rtn->llvm_ctx, 64 ), 8 ), "new_sp" );

        ir_builder->CreateStore( new_sp, rtn->stack_ptr );

        auto top_stack =
            ir_builder->CreateGEP( llvm::ArrayType::get( llvm::IntegerType::get( *rtn->llvm_ctx, 8 ), 1024 ),
                                   rtn->virtual_stack, new_sp, "top_stack" );
    };
} // namespace vmp2::lifters