src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.nodes/src/org/graalvm/compiler/nodes/calc/IntegerTestNode.java
Index Unified diffs Context diffs Sdiffs Patch New Old Previous File Next File hotspot Sdiff src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.nodes/src/org/graalvm/compiler/nodes/calc

src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.nodes/src/org/graalvm/compiler/nodes/calc/IntegerTestNode.java

Print this page




  51     }
  52 
  53     @Override
  54     public ValueNode canonical(CanonicalizerTool tool, ValueNode forX, ValueNode forY) {
  55         if (forX.isConstant() && forY.isConstant()) {
  56             return LogicConstantNode.forBoolean((forX.asJavaConstant().asLong() & forY.asJavaConstant().asLong()) == 0);
  57         }
  58         if (forX.stamp() instanceof IntegerStamp && forY.stamp() instanceof IntegerStamp) {
  59             IntegerStamp xStamp = (IntegerStamp) forX.stamp();
  60             IntegerStamp yStamp = (IntegerStamp) forY.stamp();
  61             if ((xStamp.upMask() & yStamp.upMask()) == 0) {
  62                 return LogicConstantNode.tautology();
  63             } else if ((xStamp.downMask() & yStamp.downMask()) != 0) {
  64                 return LogicConstantNode.contradiction();
  65             }
  66         }
  67         return this;
  68     }
  69 
  70     @Override
  71     public Stamp getSucceedingStampForX(boolean negated) {
  72         Stamp xStampGeneric = this.getX().stamp();
  73         Stamp yStampGeneric = this.getY().stamp();
  74         return getSucceedingStamp(negated, xStampGeneric, yStampGeneric);
  75     }
  76 
  77     private static Stamp getSucceedingStamp(boolean negated, Stamp xStampGeneric, Stamp otherStampGeneric) {
  78         if (xStampGeneric instanceof IntegerStamp && otherStampGeneric instanceof IntegerStamp) {
  79             IntegerStamp xStamp = (IntegerStamp) xStampGeneric;
  80             IntegerStamp otherStamp = (IntegerStamp) otherStampGeneric;
  81             if (negated) {
  82                 if (Long.bitCount(otherStamp.upMask()) == 1) {
  83                     long newDownMask = xStamp.downMask() | otherStamp.upMask();
  84                     if (xStamp.downMask() != newDownMask) {
  85                         return IntegerStamp.stampForMask(xStamp.getBits(), newDownMask, xStamp.upMask()).join(xStamp);
  86                     }
  87                 }
  88             } else {
  89                 long restrictedUpMask = ((~otherStamp.downMask()) & xStamp.upMask());
  90                 if (xStamp.upMask() != restrictedUpMask) {
  91                     return IntegerStamp.stampForMask(xStamp.getBits(), xStamp.downMask(), restrictedUpMask).join(xStamp);
  92                 }
  93             }
  94         }
  95         return null;
  96     }
  97 
  98     @Override
  99     public Stamp getSucceedingStampForY(boolean negated) {
 100         Stamp xStampGeneric = this.getX().stamp();
 101         Stamp yStampGeneric = this.getY().stamp();
 102         return getSucceedingStamp(negated, yStampGeneric, xStampGeneric);
 103     }
 104 
 105     @Override
 106     public TriState tryFold(Stamp xStampGeneric, Stamp yStampGeneric) {
 107         if (xStampGeneric instanceof IntegerStamp && yStampGeneric instanceof IntegerStamp) {
 108             IntegerStamp xStamp = (IntegerStamp) xStampGeneric;
 109             IntegerStamp yStamp = (IntegerStamp) yStampGeneric;
 110             if ((xStamp.upMask() & yStamp.upMask()) == 0) {
 111                 return TriState.TRUE;
 112             } else if ((xStamp.downMask() & yStamp.downMask()) != 0) {
 113                 return TriState.FALSE;
 114             }
 115         }
 116         return TriState.UNKNOWN;
 117     }
 118 }


  51     }
  52 
  53     @Override
  54     public ValueNode canonical(CanonicalizerTool tool, ValueNode forX, ValueNode forY) {
  55         if (forX.isConstant() && forY.isConstant()) {
  56             return LogicConstantNode.forBoolean((forX.asJavaConstant().asLong() & forY.asJavaConstant().asLong()) == 0);
  57         }
  58         if (forX.stamp() instanceof IntegerStamp && forY.stamp() instanceof IntegerStamp) {
  59             IntegerStamp xStamp = (IntegerStamp) forX.stamp();
  60             IntegerStamp yStamp = (IntegerStamp) forY.stamp();
  61             if ((xStamp.upMask() & yStamp.upMask()) == 0) {
  62                 return LogicConstantNode.tautology();
  63             } else if ((xStamp.downMask() & yStamp.downMask()) != 0) {
  64                 return LogicConstantNode.contradiction();
  65             }
  66         }
  67         return this;
  68     }
  69 
  70     @Override
  71     public Stamp getSucceedingStampForX(boolean negated, Stamp xStamp, Stamp yStamp) {
  72         return getSucceedingStamp(negated, xStamp, yStamp);


  73     }
  74 
  75     private static Stamp getSucceedingStamp(boolean negated, Stamp xStampGeneric, Stamp otherStampGeneric) {
  76         if (xStampGeneric instanceof IntegerStamp && otherStampGeneric instanceof IntegerStamp) {
  77             IntegerStamp xStamp = (IntegerStamp) xStampGeneric;
  78             IntegerStamp otherStamp = (IntegerStamp) otherStampGeneric;
  79             if (negated) {
  80                 if (Long.bitCount(otherStamp.upMask()) == 1) {
  81                     long newDownMask = xStamp.downMask() | otherStamp.upMask();
  82                     if (xStamp.downMask() != newDownMask) {
  83                         return IntegerStamp.stampForMask(xStamp.getBits(), newDownMask, xStamp.upMask()).join(xStamp);
  84                     }
  85                 }
  86             } else {
  87                 long restrictedUpMask = ((~otherStamp.downMask()) & xStamp.upMask());
  88                 if (xStamp.upMask() != restrictedUpMask) {
  89                     return IntegerStamp.stampForMask(xStamp.getBits(), xStamp.downMask(), restrictedUpMask).join(xStamp);
  90                 }
  91             }
  92         }
  93         return null;
  94     }
  95 
  96     @Override
  97     public Stamp getSucceedingStampForY(boolean negated, Stamp xStamp, Stamp yStamp) {
  98         return getSucceedingStamp(negated, yStamp, xStamp);


  99     }
 100 
 101     @Override
 102     public TriState tryFold(Stamp xStampGeneric, Stamp yStampGeneric) {
 103         if (xStampGeneric instanceof IntegerStamp && yStampGeneric instanceof IntegerStamp) {
 104             IntegerStamp xStamp = (IntegerStamp) xStampGeneric;
 105             IntegerStamp yStamp = (IntegerStamp) yStampGeneric;
 106             if ((xStamp.upMask() & yStamp.upMask()) == 0) {
 107                 return TriState.TRUE;
 108             } else if ((xStamp.downMask() & yStamp.downMask()) != 0) {
 109                 return TriState.FALSE;
 110             }
 111         }
 112         return TriState.UNKNOWN;
 113     }
 114 }
src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.nodes/src/org/graalvm/compiler/nodes/calc/IntegerTestNode.java
Index Unified diffs Context diffs Sdiffs Patch New Old Previous File Next File