Package com.ibm.wala.cast.ir.ssa
Class AstLexicalRead
- java.lang.Object
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- com.ibm.wala.ssa.SSAInstruction
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- com.ibm.wala.cast.ir.ssa.AstLexicalAccess
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- com.ibm.wala.cast.ir.ssa.AstLexicalRead
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public class AstLexicalRead extends AstLexicalAccess
A set of lexical reads. This instruction represents reads of a set of variables that are defined by a pair of variable name and defining code body (i.e. a method or function). This instruction has one local value number definition for each lexical read, and the call graph builder ensures that these value numbers are kept consistent as lexical uses and definitions are discovered during call graph construction.
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Nested Class Summary
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Nested classes/interfaces inherited from class com.ibm.wala.cast.ir.ssa.AstLexicalAccess
AstLexicalAccess.Access
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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 AstLexicalRead(int iindex, int lhs, String definer, String globalName, TypeReference type)
AstLexicalRead(int iindex, AstLexicalAccess.Access access)
AstLexicalRead(int iindex, AstLexicalAccess.Access[] accesses)
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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.int
getDef(int i)
Return the ith defint
getNumberOfDefs()
int
getNumberOfUses()
int
getUse(int i)
String
toString(SymbolTable symbolTable)
void
visit(SSAInstruction.IVisitor v)
Apply an IVisitor to this instruction.-
Methods inherited from class com.ibm.wala.cast.ir.ssa.AstLexicalAccess
getAccess, getAccessCount, getAccesses, getExceptionTypes, hashCode, isFallThrough, setAccesses
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Methods inherited from class com.ibm.wala.ssa.SSAInstruction
equals, getDef, getValueString, hasDef, isPEI, toString
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Constructor Detail
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AstLexicalRead
public AstLexicalRead(int iindex, AstLexicalAccess.Access[] accesses)
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AstLexicalRead
public AstLexicalRead(int iindex, AstLexicalAccess.Access access)
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AstLexicalRead
public AstLexicalRead(int iindex, int lhs, String definer, String globalName, TypeReference type)
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Method Detail
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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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getNumberOfDefs
public int getNumberOfDefs()
- Overrides:
getNumberOfDefs
in classSSAInstruction
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getDef
public int getDef(int i)
Description copied from class:SSAInstruction
Return the ith def- Overrides:
getDef
in classSSAInstruction
- Parameters:
i
- number of the def, starting at 0.
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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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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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