62 lines
1.2 KiB
Java
62 lines
1.2 KiB
Java
package com.ibm.wala.cast.js.ssa;
|
|
|
|
import java.util.Collection;
|
|
import java.util.Collections;
|
|
|
|
import com.ibm.wala.cast.js.types.JavaScriptTypes;
|
|
import com.ibm.wala.ssa.SSAInstruction;
|
|
import com.ibm.wala.ssa.SymbolTable;
|
|
import com.ibm.wala.types.TypeReference;
|
|
|
|
public class JavaScriptCheckReference extends SSAInstruction {
|
|
private final int ref;
|
|
|
|
public JavaScriptCheckReference(int ref) {
|
|
this.ref = ref;
|
|
}
|
|
|
|
@Override
|
|
public SSAInstruction copyForSSA(int[] defs, int[] uses) {
|
|
return new JavaScriptCheckReference(uses==null? ref: uses[0]);
|
|
}
|
|
|
|
@Override
|
|
public Collection<TypeReference> getExceptionTypes() {
|
|
return Collections.singleton(JavaScriptTypes.ReferenceError);
|
|
}
|
|
|
|
@Override
|
|
public int hashCode() {
|
|
return 87621 * ref;
|
|
}
|
|
|
|
@Override
|
|
public boolean isFallThrough() {
|
|
return true;
|
|
}
|
|
|
|
@Override
|
|
public String toString(SymbolTable symbolTable) {
|
|
return "check " + getValueString(symbolTable, ref);
|
|
}
|
|
|
|
@Override
|
|
public void visit(IVisitor v) {
|
|
((InstructionVisitor)v).visitCheckRef(this);
|
|
}
|
|
|
|
public boolean isPEI() {
|
|
return true;
|
|
}
|
|
|
|
public int getNumberOfUses() {
|
|
return 1;
|
|
}
|
|
|
|
public int getUse(int i) {
|
|
assert i == 0;
|
|
return ref;
|
|
}
|
|
|
|
}
|