src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.loop.phases/src/org/graalvm/compiler/loop/phases/LoopPeelingPhase.java
changeset 58877 aec7bf35d6f5
parent 58299 6df94ce3ab2f
--- a/src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.loop.phases/src/org/graalvm/compiler/loop/phases/LoopPeelingPhase.java	Thu Oct 31 14:23:06 2019 -0700
+++ b/src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.loop.phases/src/org/graalvm/compiler/loop/phases/LoopPeelingPhase.java	Thu Oct 31 16:54:16 2019 -0700
@@ -24,6 +24,7 @@
 
 package org.graalvm.compiler.loop.phases;
 
+import org.graalvm.compiler.debug.CounterKey;
 import org.graalvm.compiler.debug.DebugContext;
 import org.graalvm.compiler.loop.LoopEx;
 import org.graalvm.compiler.loop.LoopPolicies;
@@ -33,6 +34,8 @@
 
 public class LoopPeelingPhase extends LoopPhase<LoopPolicies> {
 
+    public static final CounterKey PEELED = DebugContext.counter("Peeled");
+
     public LoopPeelingPhase(LoopPolicies policies) {
         super(policies);
     }
@@ -45,10 +48,13 @@
             LoopsData data = new LoopsData(graph);
             try (DebugContext.Scope s = debug.scope("peeling", data.getCFG())) {
                 for (LoopEx loop : data.outerFirst()) {
-                    if (getPolicies().shouldPeel(loop, data.getCFG(), context.getMetaAccess())) {
-                        debug.log("Peeling %s", loop);
-                        LoopTransformations.peel(loop);
-                        debug.dump(DebugContext.DETAILED_LEVEL, graph, "Peeling %s", loop);
+                    if (loop.canDuplicateLoop() && loop.loopBegin().getLoopEndCount() > 0) {
+                        if (LoopPolicies.Options.PeelALot.getValue(graph.getOptions()) || getPolicies().shouldPeel(loop, data.getCFG(), context.getMetaAccess())) {
+                            debug.log("Peeling %s", loop);
+                            PEELED.add(debug, 1);
+                            LoopTransformations.peel(loop);
+                            debug.dump(DebugContext.DETAILED_LEVEL, graph, "Peeling %s", loop);
+                        }
                     }
                 }
                 data.deleteUnusedNodes();