75 lines
2.5 KiB
Ruby
75 lines
2.5 KiB
Ruby
module Mom
|
|
|
|
# CallableCompiler is used to generate Mom instructions.
|
|
|
|
# - mom_instructions: The sequence of mom level instructions that vool was compiled to
|
|
|
|
class CallableCompiler
|
|
|
|
def initialize( callable )
|
|
@callable = callable
|
|
@constants = []
|
|
@block_compilers = []
|
|
@mom_instructions = Risc.label(source_name, source_name)
|
|
@current = start = @risc_instructions
|
|
add_code Risc.label( source_name, "return_label")
|
|
Mom::ReturnSequence.new.to_risc(self)
|
|
add_code Risc.label( source_name, "unreachable")
|
|
@current = start
|
|
end
|
|
attr_reader :risc_instructions , :constants , :block_compilers , :callable , :current
|
|
|
|
def return_label
|
|
@risc_instructions.each do |ins|
|
|
next unless ins.is_a?(Label)
|
|
return ins if ins.name == "return_label"
|
|
end
|
|
end
|
|
|
|
# convert the given mom instruction to_risc and then add it (see add_code)
|
|
# continue down the instruction chain unti depleted
|
|
# (adding moves the insertion point so the whole mom chain is added as a risc chain)
|
|
def add_mom( instruction )
|
|
while( instruction )
|
|
raise "whats this a #{instruction}" unless instruction.is_a?(Mom::Instruction)
|
|
#puts "adding mom #{instruction.to_s}:#{instruction.next.to_s}"
|
|
instruction.to_risc( self )
|
|
reset_regs
|
|
#puts "adding risc #{risc.to_s}:#{risc.next.to_s}"
|
|
instruction = instruction.next
|
|
end
|
|
end
|
|
|
|
# add a constant (which get created during compilation and need to be linked)
|
|
def add_constant(const)
|
|
raise "Must be Parfait #{const}" unless const.is_a?(Parfait::Object)
|
|
@constants << const
|
|
end
|
|
|
|
# add a risc instruction after the current (insertion point)
|
|
# the added instruction will become the new insertion point
|
|
def add_code( instruction )
|
|
raise "Not an instruction:#{instruction.to_s}:#{instruction.class.name}" unless instruction.is_a?(Risc::Instruction)
|
|
raise instruction.to_s if( instruction.class.name.split("::").first == "Arm")
|
|
new_current = instruction.last #after insertion this point is lost
|
|
@current.insert(instruction) #insert after current
|
|
@current = new_current
|
|
self
|
|
end
|
|
|
|
# return the frame type, ie the blocks frame type
|
|
def frame_type
|
|
@callable.frame_type
|
|
end
|
|
# return the frame type, ie the blocks arguments type
|
|
def arg_type
|
|
@callable.arguments_type
|
|
end
|
|
# return the frame type, ie the blocks self_type
|
|
def receiver_type
|
|
@callable.self_type
|
|
end
|
|
|
|
end
|
|
end
|