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allow setting the source for slot loads

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so we can track more exactly which instruction created the risc
This commit is contained in:
Torsten Ruger
2018-03-22 18:45:03 +02:00
parent 9932d0bf33
commit 6e901e1718
5 changed files with 15 additions and 13 deletions
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16
lib/mom/instruction/slot_load.rb
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@ -22,18 +22,20 @@ module Mom
# SlotDefinition (see there)
#
# @right: A SlotDefinition with slots or a Mom::Constant
#
# original_source: optinally another mom instrucion that wil be passed down to created
# risc instructions. (Because SlotLoad is often used internally in mom)
class SlotLoad < Instruction
attr_reader :left , :right
def initialize(left , right)
attr_reader :left , :right , :original_source
def initialize(left , right, original_source = nil)
@left , @right = left , right
@left = SlotDefinition.new(@left.shift , @left) if @left.is_a? Array
@right = SlotDefinition.new(@right.shift , @right) if @right.is_a? Array
raise "right not Mom, #{@right.to_s}" unless @right.is_a?( SlotDefinition )
@original_source = original_source || self
end
def to_risc(compiler)
const = @right.to_register(compiler , self)
const = @right.to_register(compiler , original_source)
left_slots = @left.slots
case @left.known_object
when Symbol
@ -42,13 +44,13 @@ module Mom
if left_slots.length > 1
# swap the existing target (with a new reg) and update the index
new_left = compiler.use_reg( :int )
const << Risc::SlotToReg.new( self , left ,left_index, new_left)
const << Risc::SlotToReg.new( original_source , left ,left_index, new_left)
left = new_left
left_index = SlotLoad.resolve_to_index(left_slots[0] , left_slots[1] ,compiler)
if left_slots.length > 2
#same again, once more updating target
new_left = compiler.use_reg( :int )
const << Risc::SlotToReg.new( self , left ,left_index, new_left)
const << Risc::SlotToReg.new( original_source , left ,left_index, new_left)
left = new_left
left_index = SlotLoad.resolve_to_index(left_slots[1] , left_slots[2] ,compiler)
end
@ -60,7 +62,7 @@ module Mom
else
raise "We have left #{@left.known_object}"
end
const << Risc.reg_to_slot(self, const.register , left, left_index)
const << Risc.reg_to_slot(original_source, const.register , left, left_index)
compiler.reset_regs
return const
end