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fix block insert ordering with depth > 1

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This commit is contained in:
Torsten Ruger 2014-06-08 00:56:15 +03:00
parent 42a840614e
commit e7bb774da0
1 changed files with 6 additions and 4 deletions
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10
lib/vm/block.rb
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@ -38,17 +38,19 @@ module Vm
self self
end end
alias :<< :add_code alias :<< :add_code
alias :a :add_code
# create a new linear block after this block. Linear means there is no brach needed from this one # create a new linear block after this block. Linear means there is no brach needed from this one
# to the new one. Usually the new one just serves as jump address for a control statement # to the new one. Usually the new one just serves as jump address for a control statement
# In code generation (assembly) , new new_block is written after this one, ie zero runtime cost # In code generation (assembly) , new new_block is written after this one, ie zero runtime cost
def new_block name def new_block new_name
new_b = Block.new( name , @function , @next ) new_b = Block.new( new_name , @function , @insert_at.next )
@next = new_b @insert_at.set_next new_b
return new_b return new_b
end end
def set_next next_b
@next = next_b
end
# when control structures create new blocks (with new_block) control continues at some new block the # when control structures create new blocks (with new_block) control continues at some new block the
# the control structure creates. # the control structure creates.
# Example: while, needs 2 extra blocks # Example: while, needs 2 extra blocks