Reworking if statement

Using 2 phase approach
Flattening tbd
This commit is contained in:
Torsten Ruger
2017-09-04 21:00:08 +03:00
parent db1549e0ee
commit dab4e74659
5 changed files with 47 additions and 26 deletions

View File

@ -10,19 +10,19 @@ module Vool
end
def to_mom( method )
merge = Mom::Noop.new(:merge)
if_true = add_jump(@if_true.to_mom( method ) , merge)
if_false = add_jump(@if_false.to_mom( method ) , merge)
cond = hoist_condition( method )
check = Mom::TruthCheck.new( cond.pop , if_true , if_false , merge)
[ *cond , check , if_true , if_false , merge ]
if_true = @if_true.to_mom( method )
if_false = @if_false.to_mom( method )
condition , hoisted = hoist_condition( method )
check = Mom::IfStatement.new( Mom::TruthCheck.new(condition) , if_true , if_false )
check.hoisted = hoisted.to_mom(method) if hoisted
check
end
def hoist_condition( method )
return [@condition] if @condition.is_a?(Vool::Named)
local = method.create_tmp
assign = LocalAssignment.new( local , @condition).to_mom(method)
[assign , Vool::LocalVariable.new(local)]
assign = LocalAssignment.new( local , @condition)
[Vool::LocalVariable.new(local) , assign]
end
def collect(arr)
@ -44,11 +44,5 @@ module Vool
@if_true != nil
end
private
def add_jump( block , merge)
block = [block] unless block.is_a?(Array)
block << Mom::Jump.new(merge)
block
end
end
end