rubyx/lib/mom/instruction/argument_transfer.rb

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module Mom
# Transering the arguments from the current frame into the next frame
#
# This could be _done_ at this level, and in fact used to be.
# The instructions was introduced to
# 1. make optimisations easier
# 2. localise the inevitable change
#
# 1. The optimal implementation for this loads old and new frames into registers
# and does a whole bunch of transfers
# But if we do individual SlotMoves here, each one has to load the frames,
# thus making advanced analysis/optimisation neccessary to achieve the same effect.
#
# 2. Closures will have to have access to variables after the frame goes out of scope
# and in fact be able to change the parents variables. This design does not allow for
# this, and so will have to be change in the not so distant future.
#
class ArgumentTransfer < Instruction
attr_reader :receiver , :arguments
def initialize( receiver,arguments )
@receiver , @arguments = receiver , arguments
end
end
end