84 lines
2.0 KiB
Java
84 lines
2.0 KiB
Java
package com.ibm.wala.cast.js.ssa;
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import java.util.Collection;
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import java.util.Collections;
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import com.ibm.wala.cast.js.types.JavaScriptTypes;
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import com.ibm.wala.ssa.SSAInstruction;
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import com.ibm.wala.ssa.SSAInstructionFactory;
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import com.ibm.wala.ssa.SymbolTable;
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import com.ibm.wala.types.TypeReference;
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import com.ibm.wala.util.debug.Assertions;
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public class JavaScriptInstanceOf extends SSAInstruction {
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private final int objVal;
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private final int typeVal;
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private final int result;
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public JavaScriptInstanceOf(int iindex, int result, int objVal, int typeVal) {
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super(iindex);
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this.objVal = objVal;
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this.typeVal = typeVal;
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this.result = result;
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}
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@Override
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public SSAInstruction copyForSSA(SSAInstructionFactory insts, int[] defs, int[] uses) {
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return
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((JSInstructionFactory)insts).InstanceOf(iindex,
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defs==null? result: defs[0],
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uses==null? objVal: uses[0],
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uses==null? typeVal: uses[1]);
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}
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@Override
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public Collection<TypeReference> getExceptionTypes() {
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return Collections.singleton(JavaScriptTypes.TypeError);
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}
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public boolean isPEI() {
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return true;
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}
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@Override
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public int hashCode() {
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return objVal*31771 + typeVal*23 + result;
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}
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@Override
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public boolean isFallThrough() {
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return true;
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}
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@Override
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public String toString(SymbolTable symbolTable) {
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return getValueString(symbolTable, result) + " = " + getValueString(symbolTable, objVal) + " is instance of " + getValueString(symbolTable, typeVal);
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}
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@Override
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public void visit(IVisitor v) {
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((InstructionVisitor)v).visitJavaScriptInstanceOf(this);
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}
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public int getNumberOfDefs() {
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return 1;
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}
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public int getDef(int i) {
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assert i == 0;
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return result;
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}
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public int getNumberOfUses() {
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return 2;
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}
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public int getUse(int i) {
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switch (i) {
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case 0: return objVal;
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case 1: return typeVal;
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default: Assertions.UNREACHABLE(); return -1;
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}
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}
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}
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