Class SSASwitchInstruction
java.lang.Object
com.ibm.wala.ssa.SSAInstruction
com.ibm.wala.ssa.SSASwitchInstruction
SSA instruction representing a switch statement.
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Nested Class Summary
Nested classes/interfaces inherited from class com.ibm.wala.ssa.SSAInstruction
SSAInstruction.IVisitor, SSAInstruction.Visitor
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Field Summary
Fields inherited from class com.ibm.wala.ssa.SSAInstruction
NO_INDEX
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Constructor Summary
ConstructorDescriptionSSASwitchInstruction
(int iindex, int val, int defaultLabel, int[] casesAndLabels) The labels in casesAndLabels represent instruction indices in the IR that each switch case branches to. -
Method Summary
Modifier and TypeMethodDescriptioncopyForSSA
(SSAInstructionFactory insts, int[] defs, int[] uses) This method is meant to be used during SSA conversion for an IR that is not in SSA form.int[]
int
int
int
getTarget
(int caseValue) int
getUse
(int j) int
hashCode()
boolean
toString
(SymbolTable symbolTable) void
Apply an IVisitor to this instruction.Methods inherited from class com.ibm.wala.ssa.SSAInstruction
equals, getDef, getDef, getExceptionTypes, getNumberOfDefs, getValueString, hasDef, iIndex, isPEI, setInstructionIndex, toString
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Constructor Details
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SSASwitchInstruction
public SSASwitchInstruction(int iindex, int val, int defaultLabel, int[] casesAndLabels) The labels in casesAndLabels represent instruction indices in the IR that each switch case branches to.
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Method Details
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copyForSSA
Description copied from class:SSAInstruction
This method is meant to be used during SSA conversion for an IR that is not in SSA form. It creates a new SSAInstruction of the same type as the receiver, with a combination of the receiver's uses and defs and those from the method parameters.In particular, if the 'defs' parameter is null, then the new instruction has the same defs as the receiver. If 'defs' is not null, it must be an array with a size equal to the number of defs that the receiver instruction has. In this case, the new instruction has defs taken from the array. The uses of the new instruction work in the same way with the 'uses' parameter.
Note that this only applies to CAst-based IR translation, since Java bytecode-based IR generation uses a different SSA construction mechanism.
TODO: move this into the SSAInstructionFactory
- Specified by:
copyForSSA
in classSSAInstruction
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toString
- Specified by:
toString
in classSSAInstruction
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visit
Description copied from class:SSAInstruction
Apply an IVisitor to this instruction. We invoke the appropriate IVisitor method according to the type of this instruction.- Specified by:
visit
in classSSAInstruction
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getNumberOfUses
public int getNumberOfUses()- Overrides:
getNumberOfUses
in classSSAInstruction
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getUse
public int getUse(int j) - Overrides:
getUse
in classSSAInstruction
- Returns:
- value number representing the jth use in this instruction. -1 means TOP (i.e., the value doesn't matter)
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getTarget
public int getTarget(int caseValue) -
getDefault
public int getDefault() -
getCasesAndLabels
public int[] getCasesAndLabels() -
iterateLabels
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hashCode
public int hashCode()- Specified by:
hashCode
in classSSAInstruction
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isFallThrough
public boolean isFallThrough()- Specified by:
isFallThrough
in classSSAInstruction
- Returns:
- true iff this instruction may fall through to the next
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