Class BackEdgePoints

java.lang.Object

org.ek9lang.compiler.phase9.BackEdgePoints

All Implemented Interfaces:

BiConsumer<OperationInstr, Supplier<IRInstr>>

public final class BackEdgePoints
extends Object
implements BiConsumer<OperationInstr, Supplier<IRInstr>>

THE back-edge placement of IR_OPTIMISATION: a point instruction at the end of every loop body of an operation - the back edge, reached once per iteration after the body's own scope has dropped its values - unless one of the same opcode is already last. SafePointPlacement places SAFE_POINT with it, CancelPointPlacement places CANCEL_POINT; isLoopBody(CompositeInstr.NestedList) is THE test of which nested list that is, for a verifier too. Use this - never a second walk of the loop bodies. Stateless: hold one.

Constructor Summary

Constructors

Constructor	Description
BackEdgePoints()

Method Summary

Modifier and Type	Method	Description
void	accept(OperationInstr operation, Supplier<IRInstr> point)
boolean	isLoopBody(CompositeInstr.NestedList nested)	Is this nested list a loop body, whose end is the back edge.

Methods inherited from class Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface BiConsumer

andThen

Constructor Details

BackEdgePoints

public BackEdgePoints()

Method Details

accept

public void accept(OperationInstr operation,
 Supplier<IRInstr> point)

Specified by:

accept in interface BiConsumer<OperationInstr, Supplier<IRInstr>>

isLoopBody

public boolean isLoopBody(CompositeInstr.NestedList nested)

Is this nested list a loop body, whose end is the back edge.