rubyx/lib/ast/return_expression.rb

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module Ast
class ReturnExpression < Expression
# attr_reader :expression
def compile context
into = context.function
puts "compiling return expression #{expression}, now return in return_regsiter"
expression_value = expression.compile(context)
# copied from function expression: TODO make function
2014-06-26 16:52:15 +02:00
return_reg = Virtual::Integer.new(Virtual::RegisterMachine.instance.return_register)
if expression_value.is_a?(Virtual::IntegerConstant) or expression_value.is_a?(Virtual::ObjectConstant)
return_reg.load into , expression_value
else
return_reg.move( into, expression_value ) if expression_value.register_symbol != return_reg.register_symbol
end
#function.set_return return_reg
return return_reg
end
end
end