Package org.eclipse.sisu.space.asm
Class Edge
java.lang.Object
org.eclipse.sisu.space.asm.Edge
An edge in the control flow graph of a method. Each node of this graph is a basic block,
represented with the Label corresponding to its first instruction. Each edge goes from one node
to another, i.e. from one basic block to another (called the predecessor and successor blocks,
respectively). An edge corresponds either to a jump or ret instruction or to an exception
handler.
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Field Summary
FieldsModifier and TypeFieldDescription(package private) static final int
A control flow graph edge corresponding to an exception handler.(package private) final int
Information about this control flow graph edge.(package private) static final int
A control flow graph edge corresponding to a jump or ret instruction.(package private) Edge
The next edge in the list of outgoing edges of a basic block.(package private) final Label
The successor block of this control flow graph edge. -
Constructor Summary
Constructors -
Method Summary
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Field Details
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JUMP
static final int JUMPA control flow graph edge corresponding to a jump or ret instruction. Only used withClassWriter.COMPUTE_FRAMES
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EXCEPTION
static final int EXCEPTIONA control flow graph edge corresponding to an exception handler. Only used withClassWriter.COMPUTE_MAXS
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info
final int infoInformation about this control flow graph edge.- If
ClassWriter.COMPUTE_MAXS
is used, this field contains either a stack size delta (for an edge corresponding to a jump instruction), or the value EXCEPTION (for an edge corresponding to an exception handler). The stack size delta is the stack size just after the jump instruction, minus the stack size at the beginning of the predecessor basic block, i.e. the one containing the jump instruction. - If
ClassWriter.COMPUTE_FRAMES
is used, this field contains either the value JUMP (for an edge corresponding to a jump instruction), or the index, in theClassWriter
type table, of the exception type that is handled (for an edge corresponding to an exception handler).
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successor
The successor block of this control flow graph edge. -
nextEdge
Edge nextEdgeThe next edge in the list of outgoing edges of a basic block. SeeLabel.outgoingEdges
.
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Constructor Details