55     public ValueNode canonical(CanonicalizerTool tool, ValueNode forX, ValueNode forY) {
  56         if (forX.isConstant() && forY.isConstant()) {
  57             @SuppressWarnings("hiding")
  58             long y = forY.asJavaConstant().asLong();
  59             if (y == 0) {
  60                 return this; // this will trap, can not canonicalize
  61             }
  62             return ConstantNode.forIntegerStamp(stamp(), forX.asJavaConstant().asLong() % y);
  63         } else if (forY.isConstant() && forX.stamp() instanceof IntegerStamp && forY.stamp() instanceof IntegerStamp) {
  64             long constY = forY.asJavaConstant().asLong();
  65             IntegerStamp xStamp = (IntegerStamp) forX.stamp();
  66             IntegerStamp yStamp = (IntegerStamp) forY.stamp();
  67             if (constY < 0 && constY != CodeUtil.minValue(yStamp.getBits())) {
  68                 return new SignedRemNode(forX, ConstantNode.forIntegerStamp(yStamp, -constY)).canonical(tool);
  69             }
  70 
  71             if (constY == 1) {
  72                 return ConstantNode.forIntegerStamp(stamp(), 0);
  73             } else if (CodeUtil.isPowerOf2(constY)) {
  74                 if (xStamp.isPositive()) {

  75                     return new AndNode(forX, ConstantNode.forIntegerStamp(stamp(), constY - 1));
  76                 } else if (xStamp.isNegative()) {

  77                     return new NegateNode(new AndNode(new NegateNode(forX), ConstantNode.forIntegerStamp(stamp(), constY - 1)));
  78                 } else {
  79                     return new ConditionalNode(IntegerLessThanNode.create(forX, ConstantNode.forIntegerStamp(forX.stamp(), 0)),
  80                                     new NegateNode(new AndNode(new NegateNode(forX), ConstantNode.forIntegerStamp(stamp(), constY - 1))),
  81                                     new AndNode(forX, ConstantNode.forIntegerStamp(stamp(), constY - 1)));
  82                 }
  83             }
  84         }
  85         return this;
  86     }
  87 
  88     @Override
  89     public void generate(NodeLIRBuilderTool gen) {
  90         gen.setResult(this, gen.getLIRGeneratorTool().getArithmetic().emitRem(gen.operand(getX()), gen.operand(getY()), gen.state(this)));
  91     }
  92 }

  55     public ValueNode canonical(CanonicalizerTool tool, ValueNode forX, ValueNode forY) {
  56         if (forX.isConstant() && forY.isConstant()) {
  57             @SuppressWarnings("hiding")
  58             long y = forY.asJavaConstant().asLong();
  59             if (y == 0) {
  60                 return this; // this will trap, can not canonicalize
  61             }
  62             return ConstantNode.forIntegerStamp(stamp(), forX.asJavaConstant().asLong() % y);
  63         } else if (forY.isConstant() && forX.stamp() instanceof IntegerStamp && forY.stamp() instanceof IntegerStamp) {
  64             long constY = forY.asJavaConstant().asLong();
  65             IntegerStamp xStamp = (IntegerStamp) forX.stamp();
  66             IntegerStamp yStamp = (IntegerStamp) forY.stamp();
  67             if (constY < 0 && constY != CodeUtil.minValue(yStamp.getBits())) {
  68                 return new SignedRemNode(forX, ConstantNode.forIntegerStamp(yStamp, -constY)).canonical(tool);
  69             }
  70 
  71             if (constY == 1) {
  72                 return ConstantNode.forIntegerStamp(stamp(), 0);
  73             } else if (CodeUtil.isPowerOf2(constY)) {
  74                 if (xStamp.isPositive()) {
  75                     // x & (y - 1)
  76                     return new AndNode(forX, ConstantNode.forIntegerStamp(stamp(), constY - 1));
  77                 } else if (xStamp.isNegative()) {
  78                     // -((-x) & (y - 1))
  79                     return new NegateNode(new AndNode(new NegateNode(forX), ConstantNode.forIntegerStamp(stamp(), constY - 1)));
  80                 } else {
  81                     // x - ((x / y) << log2(y))
  82                     return SubNode.create(forX, LeftShiftNode.create(SignedDivNode.canonical(forX, constY), ConstantNode.forInt(CodeUtil.log2(constY))));

  83                 }
  84             }
  85         }
  86         return this;
  87     }
  88 
  89     @Override
  90     public void generate(NodeLIRBuilderTool gen) {
  91         gen.setResult(this, gen.getLIRGeneratorTool().getArithmetic().emitRem(gen.operand(getX()), gen.operand(getY()), gen.state(this)));
  92     }
  93 }