Class AstLexicalWrite
java.lang.Object
com.ibm.wala.ssa.SSAInstruction
com.ibm.wala.cast.ir.ssa.AstLexicalAccess
com.ibm.wala.cast.ir.ssa.AstLexicalWrite
A set of lexical writes. This instruction represents writes 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 use for each lexical write, and the call graph builder
ensures that these value numbers are kept consistent as lexical uses and definitions are
discovered during call graph construction.
- Author:
- Julian Dolby (dolby@us.ibm.com)
-
Nested Class Summary
Nested classes/interfaces inherited from class com.ibm.wala.cast.ir.ssa.AstLexicalAccess
AstLexicalAccess.Access
Nested classes/interfaces inherited from class com.ibm.wala.ssa.SSAInstruction
SSAInstruction.IVisitor, SSAInstruction.Visitor
-
Field Summary
Fields inherited from class com.ibm.wala.ssa.SSAInstruction
NO_INDEX
-
Constructor Summary
ConstructorDescriptionAstLexicalWrite
(int iindex, AstLexicalAccess.Access access) AstLexicalWrite
(int iindex, AstLexicalAccess.Access[] accesses) AstLexicalWrite
(int iindex, String definer, String globalName, TypeReference type, int rhs) -
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
getDef
(int i) Return the ith defint
int
int
getUse
(int i) toString
(SymbolTable symbolTable) void
Apply an IVisitor to this instruction.Methods inherited from class com.ibm.wala.cast.ir.ssa.AstLexicalAccess
getAccess, getAccessCount, getAccesses, getExceptionTypes, hashCode, isFallThrough, setAccesses
Methods inherited from class com.ibm.wala.ssa.SSAInstruction
equals, getDef, getValueString, hasDef, iIndex, isPEI, setInstructionIndex, toString
-
Constructor Details
-
AstLexicalWrite
-
AstLexicalWrite
-
AstLexicalWrite
-
-
Method Details
-
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
-
getNumberOfUses
public int getNumberOfUses()- Overrides:
getNumberOfUses
in classSSAInstruction
-
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)
-
getNumberOfDefs
public int getNumberOfDefs()- Overrides:
getNumberOfDefs
in classSSAInstruction
-
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.
-
toString
- Specified by:
toString
in classSSAInstruction
-
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
-