Package com.ibm.wala.cast.ir.ssa
Class AstAssertInstruction
- java.lang.Object
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- com.ibm.wala.ssa.SSAInstruction
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- com.ibm.wala.cast.ir.ssa.AstAssertInstruction
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public class AstAssertInstruction extends SSAInstruction
An assert statement, as found in a variety of languages. It has a use which is the value being asserted to be true. Additionally, there is flag which denotes whether the assertion is from a specification (the usual case) or is an assertion introduced by "compilation" of whatever sort (e.g. to add assertions regarding loop conditions needed by bounded model checking).
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Nested Class Summary
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Nested classes/interfaces inherited from class com.ibm.wala.ssa.SSAInstruction
SSAInstruction.IVisitor, SSAInstruction.Visitor
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Field Summary
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Fields inherited from class com.ibm.wala.ssa.SSAInstruction
iindex, NO_INDEX
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Constructor Summary
Constructors Constructor Description AstAssertInstruction(int iindex, int value, boolean fromSpecification)
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description SSAInstruction
copyForSSA(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.Collection<TypeReference>
getExceptionTypes()
This method should never return null.int
getNumberOfUses()
int
getUse(int i)
int
hashCode()
boolean
isFallThrough()
boolean
isFromSpecification()
String
toString(SymbolTable symbolTable)
void
visit(SSAInstruction.IVisitor v)
Apply an IVisitor to this instruction.-
Methods inherited from class com.ibm.wala.ssa.SSAInstruction
equals, getDef, getDef, getNumberOfDefs, getValueString, hasDef, isPEI, toString
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Method Detail
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getNumberOfUses
public int getNumberOfUses()
- Overrides:
getNumberOfUses
in classSSAInstruction
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getUse
public int getUse(int i)
- 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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copyForSSA
public SSAInstruction copyForSSA(SSAInstructionFactory insts, int[] defs, int[] uses)
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
public String toString(SymbolTable symbolTable)
- Specified by:
toString
in classSSAInstruction
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visit
public void visit(SSAInstruction.IVisitor v)
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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hashCode
public int hashCode()
- Specified by:
hashCode
in classSSAInstruction
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getExceptionTypes
public Collection<TypeReference> getExceptionTypes()
Description copied from class:SSAInstruction
This method should never return null.- Overrides:
getExceptionTypes
in classSSAInstruction
- Returns:
- the set of exception types that an instruction might throw ... disregarding athrows and invokes.
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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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isFromSpecification
public boolean isFromSpecification()
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