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src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.phases.common/src/org/graalvm/compiler/phases/common/RemoveValueProxyPhase.java

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   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 
  24 
  25 package org.graalvm.compiler.phases.common;
  26 
  27 import org.graalvm.compiler.nodes.FrameState;
  28 import org.graalvm.compiler.nodes.LoopExitNode;
  29 import org.graalvm.compiler.nodes.ProxyNode;
  30 import org.graalvm.compiler.nodes.StructuredGraph;
  31 import org.graalvm.compiler.nodes.util.GraphUtil;
  32 import org.graalvm.compiler.phases.Phase;
  33 
  34 public class RemoveValueProxyPhase extends Phase {
  35 
  36     @Override
  37     protected void run(StructuredGraph graph) {
  38         for (LoopExitNode exit : graph.getNodes(LoopExitNode.TYPE)) {
  39             for (ProxyNode vpn : exit.proxies().snapshot()) {
  40                 vpn.replaceAtUsagesAndDelete(vpn.value());
  41             }
  42             FrameState stateAfter = exit.stateAfter();
  43             if (stateAfter != null) {

  44                 exit.setStateAfter(null);
  45                 if (stateAfter.hasNoUsages()) {
  46                     GraphUtil.killWithUnusedFloatingInputs(stateAfter);
  47                 }
  48             }
  49         }
  50         graph.setHasValueProxies(false);
  51     }
  52 }


   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 
  24 
  25 package org.graalvm.compiler.phases.common;
  26 
  27 import org.graalvm.compiler.nodes.FrameState;
  28 import org.graalvm.compiler.nodes.LoopExitNode;

  29 import org.graalvm.compiler.nodes.StructuredGraph;
  30 import org.graalvm.compiler.nodes.util.GraphUtil;
  31 import org.graalvm.compiler.phases.Phase;
  32 
  33 public class RemoveValueProxyPhase extends Phase {
  34 
  35     @Override
  36     protected void run(StructuredGraph graph) {
  37         for (LoopExitNode exit : graph.getNodes(LoopExitNode.TYPE)) {
  38             exit.removeProxies();
  39             FrameState frameState = exit.stateAfter();
  40             if (frameState != null && frameState.isExceptionHandlingBCI()) {
  41                 // The parser will create loop exits with such BCIs on the exception handling path.
  42                 // Loop optimizations must avoid duplicating such exits
  43                 // We clean them up here otherwise they could survive until code generation
  44                 exit.setStateAfter(null);
  45                 GraphUtil.tryKillUnused(frameState);


  46             }
  47         }
  48         graph.setHasValueProxies(false);
  49     }
  50 }
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