Simplify loop, loop-multiple relooped block lowering

kernel/modelverse_jit/cfg_to_tree.py

@@ -72,12 +72,8 @@ class LoopBlock(object):
 
     def lower(self, state):
         """Lowers this 'loop' block to a tree."""
-        inner = tree_ir.LoopInstruction(
-            tree_ir.create_block(
-                self.inner.lower(state),
-                tree_ir.BreakInstruction()))
         return tree_ir.create_block(
-            inner,
+            tree_ir.LoopInstruction(self.inner.lower(state)),
             self.next_block.lower(state))
 
 class MultipleBlock(object):
@@ -112,12 +108,8 @@ class MultipleLoopBlock(MultipleBlock):
 
     def lower(self, state):
         """Lowers this 'multiple' block to a tree."""
-        inner = tree_ir.LoopInstruction(
-            tree_ir.create_block(
-                self.lower_handled_blocks(state),
-                tree_ir.BreakInstruction()))
         return tree_ir.create_block(
-            inner,
+            tree_ir.LoopInstruction(self.lower_handled_blocks(state)),
             self.next_block.lower(state))
 
 class ContinueFlow(cfg_ir.FlowInstruction):