public static void Return(this FuncBuilder f, IntExpression expr)
{
using (f.OpenScope("return")) {
var emitter = CodeGenerator.Emitter;
var resultStorage = f.Declare.Int("result");
var exprResult = expr.EvaluateTo(resultStorage);
var exprRegOrByte = exprResult.ToRegisterOrByte(f.Scratch0);
if (exprRegOrByte.IsRegister)
{
emitter.EmitRegisterMoveIfDifferent(Register.R0, exprRegOrByte.Register);
}
else
{
emitter.Emit(Format3OpCode.MOV, Register.R0, exprRegOrByte.Byte);
}
BranchLogic.UnconditionalBranchTo(f.TheExitLabel);
}
}