105             }
 106         } else {
 107             if (JavaConstant.NULL_POINTER.equals(c)) {
 108                 return KLASS_ALWAYS_NULL;
 109             }
 110         }
 111 
 112         assert c instanceof HotSpotMetaspaceConstant;
 113         assert ((HotSpotMetaspaceConstant) c).isCompressed() == isCompressed();
 114         if (nonNull()) {
 115             return this;
 116         }
 117         if (isCompressed()) {
 118             return new KlassPointerStamp(true, false, encoding);
 119         } else {
 120             return KLASS_NON_NULL;
 121         }
 122     }
 123 
 124     @Override
 125     public Constant asConstant() {
 126         if (alwaysNull() && isCompressed()) {
 127             return HotSpotCompressedNullConstant.COMPRESSED_NULL;
 128         } else {
 129             return super.asConstant();
 130         }
 131     }
 132 
 133     @Override
 134     public LIRKind getLIRKind(LIRKindTool tool) {
 135         if (isCompressed()) {
 136             return tool.getNarrowPointerKind();
 137         } else {
 138             return super.getLIRKind(tool);
 139         }
 140     }
 141 
 142     public boolean isCompressed() {
 143         return encoding != null;
 144     }
 145 
 146     public CompressEncoding getEncoding() {
 147         return encoding;
 148     }
 149 

 105             }
 106         } else {
 107             if (JavaConstant.NULL_POINTER.equals(c)) {
 108                 return KLASS_ALWAYS_NULL;
 109             }
 110         }
 111 
 112         assert c instanceof HotSpotMetaspaceConstant;
 113         assert ((HotSpotMetaspaceConstant) c).isCompressed() == isCompressed();
 114         if (nonNull()) {
 115             return this;
 116         }
 117         if (isCompressed()) {
 118             return new KlassPointerStamp(true, false, encoding);
 119         } else {
 120             return KLASS_NON_NULL;
 121         }
 122     }
 123 
 124     @Override
 125     public JavaConstant nullConstant() {
 126         if (isCompressed()) {
 127             return HotSpotCompressedNullConstant.COMPRESSED_NULL;
 128         } else {
 129             return super.nullConstant();
 130         }
 131     }
 132 
 133     @Override
 134     public LIRKind getLIRKind(LIRKindTool tool) {
 135         if (isCompressed()) {
 136             return tool.getNarrowPointerKind();
 137         } else {
 138             return super.getLIRKind(tool);
 139         }
 140     }
 141 
 142     public boolean isCompressed() {
 143         return encoding != null;
 144     }
 145 
 146     public CompressEncoding getEncoding() {
 147         return encoding;
 148     }
 149