Reduce reporting of polymophism

fangerer · fangerer · commit 1bf5e7bce174 · 2021-03-01T14:23:05.000+01:00
diff --git a/graalpython/com.oracle.graal.python/src/com/oracle/graal/python/builtins/modules/BuiltinConstructors.java b/graalpython/com.oracle.graal.python/src/com/oracle/graal/python/builtins/modules/BuiltinConstructors.java
@@ -256,6 +256,7 @@
 import com.oracle.truffle.api.dsl.Fallback;
 import com.oracle.truffle.api.dsl.GenerateNodeFactory;
 import com.oracle.truffle.api.dsl.ReportPolymorphism;
+import com.oracle.truffle.api.dsl.ReportPolymorphism.Megamorphic;
 import com.oracle.truffle.api.dsl.Specialization;
 import com.oracle.truffle.api.dsl.TypeSystemReference;
 import com.oracle.truffle.api.frame.VirtualFrame;
@@ -2221,7 +2222,6 @@ public PFunction function(Object cls, Object method_def, Object def, Object name
     @Builtin(name = TYPE, minNumOfPositionalArgs = 2, maxNumOfPositionalArgs = 4, takesVarKeywordArgs = true, constructsClass = PythonBuiltinClassType.PythonClass)
     @GenerateNodeFactory
     @TypeSystemReference(PythonArithmeticTypes.class)
-    @ReportPolymorphism
     public abstract static class TypeNode extends PythonBuiltinNode {
         private static final long SIZEOF_PY_OBJECT_PTR = Long.BYTES;
 
@@ -2257,6 +2257,7 @@ Object type(Object cls, Object obj, PNone bases, PNone dict, PKeyword[] kwds,
             }
         }
 
+        @Megamorphic
         @Specialization(guards = "isString(wName)")
         Object typeNew(VirtualFrame frame, Object cls, Object wName, PTuple bases, PDict namespaceOrig, PKeyword[] kwds,
                         @CachedLibrary(limit = "5") PythonObjectLibrary lib,
diff --git a/graalpython/com.oracle.graal.python/src/com/oracle/graal/python/builtins/objects/cext/capi/CExtNodes.java b/graalpython/com.oracle.graal.python/src/com/oracle/graal/python/builtins/objects/cext/capi/CExtNodes.java
@@ -331,7 +331,6 @@ public static FromNativeSubclassNode create() {
 
     // -----------------------------------------------------------------------------------------------------------------
     @GenerateUncached
-    @ReportPolymorphism
     @ImportStatic({PGuards.class, CApiGuards.class})
     public abstract static class ToSulongNode extends CExtToNativeNode {
 
@@ -565,7 +564,6 @@ public static ToSulongNode getUncached() {
      */
     @GenerateUncached
     @ImportStatic({PGuards.class, CApiGuards.class})
-    @ReportPolymorphism
     public abstract static class ToNewRefNode extends CExtToNativeNode {
 
         public final Object executeInt(int i) {
diff --git a/graalpython/com.oracle.graal.python/src/com/oracle/graal/python/builtins/objects/cext/common/CExtParseArgumentsNode.java b/graalpython/com.oracle.graal.python/src/com/oracle/graal/python/builtins/objects/cext/common/CExtParseArgumentsNode.java
@@ -91,6 +91,7 @@
 import com.oracle.truffle.api.dsl.GenerateUncached;
 import com.oracle.truffle.api.dsl.ImportStatic;
 import com.oracle.truffle.api.dsl.ReportPolymorphism;
+import com.oracle.truffle.api.dsl.ReportPolymorphism.Megamorphic;
 import com.oracle.truffle.api.dsl.Specialization;
 import com.oracle.truffle.api.interop.ArityException;
 import com.oracle.truffle.api.interop.InteropException;
@@ -136,7 +137,6 @@ public abstract class CExtParseArgumentsNode {
     static final char FORMAT_PAR_OPEN = '(';
 
     @GenerateUncached
-    @ReportPolymorphism
     @ImportStatic(PGuards.class)
     public abstract static class ParseTupleAndKeywordsNode extends Node {
 
@@ -162,6 +162,7 @@ int doSpecial(String funName, PTuple argv, Object kwds, @SuppressWarnings("unuse
         }
 
         @Specialization(guards = "isDictOrNull(kwds)", replaces = "doSpecial")
+        @Megamorphic
         int doGeneric(String funName, PTuple argv, Object kwds, String format, Object kwdnames, Object varargs, CExtContext nativeContext,
                         @Cached ConvertArgNode convertArgNode,
                         @Cached HashingCollectionNodes.LenNode kwdsLenNode,
diff --git a/graalpython/com.oracle.graal.python/src/com/oracle/graal/python/builtins/objects/complex/ComplexBuiltins.java b/graalpython/com.oracle.graal.python/src/com/oracle/graal/python/builtins/objects/complex/ComplexBuiltins.java
@@ -501,7 +501,6 @@ PNotImplemented doComplex(Object left, Object right) {
     @Builtin(name = __POW__, minNumOfPositionalArgs = 2, maxNumOfPositionalArgs = 3)
     @TypeSystemReference(PythonArithmeticTypes.class)
     @GenerateNodeFactory
-    @ReportPolymorphism
     abstract static class PowerNode extends PythonTernaryBuiltinNode {
 
         static boolean isSmallPositive(long l) {
diff --git a/graalpython/com.oracle.graal.python/src/com/oracle/graal/python/builtins/objects/generator/GeneratorBuiltins.java b/graalpython/com.oracle.graal.python/src/com/oracle/graal/python/builtins/objects/generator/GeneratorBuiltins.java
@@ -89,6 +89,7 @@
 import com.oracle.truffle.api.dsl.ImportStatic;
 import com.oracle.truffle.api.dsl.NodeFactory;
 import com.oracle.truffle.api.dsl.ReportPolymorphism;
+import com.oracle.truffle.api.dsl.ReportPolymorphism.Megamorphic;
 import com.oracle.truffle.api.dsl.Specialization;
 import com.oracle.truffle.api.frame.MaterializedFrame;
 import com.oracle.truffle.api.frame.VirtualFrame;
@@ -141,7 +142,6 @@ private static void checkResumable(PythonBuiltinBaseNode node, PGenerator self)
     }
 
     @ImportStatic({PGuards.class, PythonOptions.class})
-    @ReportPolymorphism
     abstract static class ResumeGeneratorNode extends Node {
         public abstract Object execute(VirtualFrame frame, PGenerator self, Object sendValue);
 
@@ -165,6 +165,7 @@ static Object cached(VirtualFrame frame, PGenerator self, Object sendValue,
         }
 
         @Specialization(replaces = "cached")
+        @Megamorphic
         static Object generic(VirtualFrame frame, PGenerator self, Object sendValue,
                         @Cached GenericInvokeNode call) {
             self.setRunning(true);
diff --git a/graalpython/com.oracle.graal.python/src/com/oracle/graal/python/nodes/PRaiseNode.java b/graalpython/com.oracle.graal.python/src/com/oracle/graal/python/nodes/PRaiseNode.java
@@ -64,7 +64,6 @@
 
 @ImportStatic(PGuards.class)
 @GenerateUncached
-@ReportPolymorphism
 public abstract class PRaiseNode extends Node {
 
     public abstract PException execute(Node raisingNode, Object type, Object cause, Object format, Object[] arguments);
diff --git a/graalpython/com.oracle.graal.python/src/com/oracle/graal/python/nodes/attributes/LookupAttributeInMRONode.java b/graalpython/com.oracle.graal.python/src/com/oracle/graal/python/nodes/attributes/LookupAttributeInMRONode.java
@@ -70,11 +70,11 @@
 import com.oracle.truffle.api.dsl.GenerateUncached;
 import com.oracle.truffle.api.dsl.ImportStatic;
 import com.oracle.truffle.api.dsl.ReportPolymorphism;
+import com.oracle.truffle.api.dsl.ReportPolymorphism.Megamorphic;
 import com.oracle.truffle.api.dsl.Specialization;
 import com.oracle.truffle.api.nodes.ExplodeLoop;
 
 @ImportStatic(PythonOptions.class)
-@ReportPolymorphism
 public abstract class LookupAttributeInMRONode extends PNodeWithContext {
     @GenerateUncached
     public abstract static class Dynamic extends PNodeWithContext {
@@ -310,6 +310,7 @@ protected Object lookupCachedLen(@SuppressWarnings("unused") Object klass,
     }
 
     @Specialization(replaces = {"lookupConstantMROCached", "lookupConstantMRO", "lookupCachedLen"})
+    @Megamorphic
     protected Object lookup(Object klass,
                     @Cached("createForceType()") ReadAttributeFromObjectNode readAttrNode) {
         return lookupSlow(klass, key, ensureGetMroNode(), readAttrNode, skipPythonClasses);
diff --git a/graalpython/com.oracle.graal.python/src/com/oracle/graal/python/nodes/attributes/ReadAttributeFromDynamicObjectNode.java b/graalpython/com.oracle.graal.python/src/com/oracle/graal/python/nodes/attributes/ReadAttributeFromDynamicObjectNode.java
@@ -50,7 +50,6 @@
 import com.oracle.truffle.api.dsl.Cached;
 import com.oracle.truffle.api.dsl.GenerateUncached;
 import com.oracle.truffle.api.dsl.ImportStatic;
-import com.oracle.truffle.api.dsl.ReportPolymorphism;
 import com.oracle.truffle.api.dsl.Specialization;
 import com.oracle.truffle.api.library.CachedLibrary;
 import com.oracle.truffle.api.object.DynamicObject;
@@ -60,7 +59,6 @@
 import com.oracle.truffle.api.object.Shape;
 
 @ImportStatic({PGuards.class, PythonOptions.class})
-@ReportPolymorphism
 @GenerateUncached
 public abstract class ReadAttributeFromDynamicObjectNode extends ObjectAttributeNode {
     public static ReadAttributeFromDynamicObjectNode create() {
diff --git a/graalpython/com.oracle.graal.python/src/com/oracle/graal/python/nodes/attributes/WriteAttributeToDynamicObjectNode.java b/graalpython/com.oracle.graal.python/src/com/oracle/graal/python/nodes/attributes/WriteAttributeToDynamicObjectNode.java
@@ -45,15 +45,13 @@
 import com.oracle.truffle.api.dsl.Cached;
 import com.oracle.truffle.api.dsl.GenerateUncached;
 import com.oracle.truffle.api.dsl.ImportStatic;
-import com.oracle.truffle.api.dsl.ReportPolymorphism;
 import com.oracle.truffle.api.dsl.Specialization;
 import com.oracle.truffle.api.library.CachedLibrary;
 import com.oracle.truffle.api.object.DynamicObject;
 import com.oracle.truffle.api.object.DynamicObjectLibrary;
 import com.oracle.truffle.api.object.HiddenKey;
 
 @ImportStatic(PythonOptions.class)
-@ReportPolymorphism
 @GenerateUncached
 public abstract class WriteAttributeToDynamicObjectNode extends ObjectAttributeNode {
 
diff --git a/graalpython/com.oracle.graal.python/src/com/oracle/graal/python/nodes/call/CallDispatchNode.java b/graalpython/com.oracle.graal.python/src/com/oracle/graal/python/nodes/call/CallDispatchNode.java
@@ -36,14 +36,13 @@
 import com.oracle.truffle.api.dsl.Cached;
 import com.oracle.truffle.api.dsl.GenerateUncached;
 import com.oracle.truffle.api.dsl.ImportStatic;
-import com.oracle.truffle.api.dsl.ReportPolymorphism;
+import com.oracle.truffle.api.dsl.ReportPolymorphism.Megamorphic;
 import com.oracle.truffle.api.dsl.Specialization;
 import com.oracle.truffle.api.frame.Frame;
 import com.oracle.truffle.api.frame.VirtualFrame;
 import com.oracle.truffle.api.nodes.Node;
 
 @ImportStatic(PythonOptions.class)
-@ReportPolymorphism
 @GenerateUncached
 public abstract class CallDispatchNode extends Node {
 
@@ -133,12 +132,14 @@ protected Object callBuiltinFunctionCachedCt(VirtualFrame frame, @SuppressWarnin
     }
 
     @Specialization(replaces = {"callFunctionCached", "callFunctionCachedCode", "callFunctionCachedCt"})
+    @Megamorphic
     protected Object callFunctionUncached(Frame frame, PFunction callee, Object[] arguments,
                     @Cached GenericInvokeNode invoke) {
         return invoke.executeInternal(frame, callee, arguments);
     }
 
     @Specialization(replaces = {"callBuiltinFunctionCached", "callBuiltinFunctionCachedCt"})
+    @Megamorphic
     protected Object callBuiltinFunctionUncached(Frame frame, PBuiltinFunction callee, Object[] arguments,
                     @Cached GenericInvokeNode invoke) {
         return invoke.executeInternal(frame, callee, arguments);
diff --git a/graalpython/com.oracle.graal.python/src/com/oracle/graal/python/nodes/call/CallNode.java b/graalpython/com.oracle.graal.python/src/com/oracle/graal/python/nodes/call/CallNode.java
@@ -61,7 +61,7 @@
 import com.oracle.truffle.api.dsl.Cached.Shared;
 import com.oracle.truffle.api.dsl.GenerateUncached;
 import com.oracle.truffle.api.dsl.ImportStatic;
-import com.oracle.truffle.api.dsl.ReportPolymorphism;
+import com.oracle.truffle.api.dsl.ReportPolymorphism.Megamorphic;
 import com.oracle.truffle.api.dsl.Specialization;
 import com.oracle.truffle.api.dsl.TypeSystemReference;
 import com.oracle.truffle.api.frame.Frame;
@@ -71,7 +71,6 @@
 
 @TypeSystemReference(PythonTypes.class)
 @ImportStatic({PGuards.class, SpecialMethodNames.class})
-@ReportPolymorphism
 @GenerateUncached
 public abstract class CallNode extends PNodeWithContext {
     public static CallNode create() {
@@ -194,6 +193,7 @@ protected Object builtinFunctionCall(VirtualFrame frame, PBuiltinFunction callab
 
     @Specialization(replaces = {"doObjectAndType", "methodCallBuiltinDirect", "methodCallDirect", "builtinMethodCallBuiltinDirectCached",
                     "builtinMethodCallBuiltinDirect", "methodCall", "builtinMethodCall", "functionCall", "builtinFunctionCall"})
+    @Megamorphic
     protected Object doGeneric(VirtualFrame frame, Object callableObject, Object[] arguments, PKeyword[] keywords,
                     @Shared("dispatchNode") @Cached CallDispatchNode dispatch,
                     @Shared("argsNode") @Cached CreateArgumentsNode createArgs,
diff --git a/graalpython/com.oracle.graal.python/src/com/oracle/graal/python/nodes/call/special/CallBinaryMethodNode.java b/graalpython/com.oracle.graal.python/src/com/oracle/graal/python/nodes/call/special/CallBinaryMethodNode.java
@@ -51,14 +51,14 @@
 import com.oracle.truffle.api.dsl.Cached;
 import com.oracle.truffle.api.dsl.GenerateUncached;
 import com.oracle.truffle.api.dsl.ReportPolymorphism;
+import com.oracle.truffle.api.dsl.ReportPolymorphism.Megamorphic;
 import com.oracle.truffle.api.dsl.Specialization;
 import com.oracle.truffle.api.frame.Frame;
 import com.oracle.truffle.api.frame.VirtualFrame;
 import com.oracle.truffle.api.nodes.UnexpectedResultException;
 import com.oracle.truffle.api.profiles.ConditionProfile;
 
 @GenerateUncached
-@ReportPolymorphism
 public abstract class CallBinaryMethodNode extends CallReversibleMethodNode {
     public static CallBinaryMethodNode create() {
         return CallBinaryMethodNodeGen.create();
@@ -455,6 +455,7 @@ Object callSelfMethod(VirtualFrame frame, @SuppressWarnings("unused") PBuiltinMe
                     "callIntSingleReverse", "callIntReverse", "callBoolIntSingleReverse", "callBoolIntReverse", "callLongSingleReverse", "callLongReverse", "callBoolLongSingleReverse",
                     "callBoolLongReverse", "callDoubleSingleReverse", "callDoubleReverse", "callBoolDoubleSingleReverse", "callBoolDoubleReverse", "callObjectSingleContextReverse",
                     "callObjectReverse", "callMethodSingleContext", "callSelfMethodSingleContext", "callMethod", "callSelfMethod"})
+    @Megamorphic
     static Object call(VirtualFrame frame, Object func, Object arg1, Object arg2,
                     @Cached CallNode callNode,
                     @Cached ConditionProfile isBoundProfile) {
diff --git a/graalpython/com.oracle.graal.python/src/com/oracle/graal/python/nodes/call/special/CallSpecialMethodNode.java b/graalpython/com.oracle.graal.python/src/com/oracle/graal/python/nodes/call/special/CallSpecialMethodNode.java
@@ -73,7 +73,6 @@
 
 @TypeSystemReference(PythonTypes.class)
 @ImportStatic(PythonOptions.class)
-@ReportPolymorphism
 @NodeField(name = "maxSizeExceeded", type = boolean.class)
 abstract class CallSpecialMethodNode extends Node {
 
diff --git a/graalpython/com.oracle.graal.python/src/com/oracle/graal/python/nodes/call/special/CallTernaryMethodNode.java b/graalpython/com.oracle.graal.python/src/com/oracle/graal/python/nodes/call/special/CallTernaryMethodNode.java
@@ -51,12 +51,12 @@
 import com.oracle.truffle.api.dsl.Cached;
 import com.oracle.truffle.api.dsl.GenerateUncached;
 import com.oracle.truffle.api.dsl.ReportPolymorphism;
+import com.oracle.truffle.api.dsl.ReportPolymorphism.Megamorphic;
 import com.oracle.truffle.api.dsl.Specialization;
 import com.oracle.truffle.api.frame.Frame;
 import com.oracle.truffle.api.frame.VirtualFrame;
 import com.oracle.truffle.api.profiles.ConditionProfile;
 
-@ReportPolymorphism
 @GenerateUncached
 public abstract class CallTernaryMethodNode extends CallReversibleMethodNode {
     public static CallTernaryMethodNode create() {
@@ -208,6 +208,7 @@ Object callSelfMethod(VirtualFrame frame, @SuppressWarnings("unused") PBuiltinMe
                     "doBuiltinFunctionOIOCachedReverse", "doBuiltinFunctionCachedReverse", "doBuiltinFunctionOIOCtCachedReverse", "doBuiltinFunctionCtCachedReverse",
                     "doBuiltinMethodOIOCached", "doBuiltinMethodCached", "doBuiltinMethodOIOCtCached", "doBuiltinMethodCtCached", "callSelfMethodSingleContext",
                     "callSelfMethod"})
+    @Megamorphic
     static Object call(VirtualFrame frame, Object func, Object arg1, Object arg2, Object arg3,
                     @Cached CallNode callNode,
                     @Cached ConditionProfile isBoundProfile) {
diff --git a/graalpython/com.oracle.graal.python/src/com/oracle/graal/python/nodes/call/special/CallUnaryMethodNode.java b/graalpython/com.oracle.graal.python/src/com/oracle/graal/python/nodes/call/special/CallUnaryMethodNode.java
@@ -53,13 +53,13 @@
 import com.oracle.truffle.api.dsl.Cached;
 import com.oracle.truffle.api.dsl.GenerateUncached;
 import com.oracle.truffle.api.dsl.ReportPolymorphism;
+import com.oracle.truffle.api.dsl.ReportPolymorphism.Megamorphic;
 import com.oracle.truffle.api.dsl.Specialization;
 import com.oracle.truffle.api.frame.Frame;
 import com.oracle.truffle.api.frame.VirtualFrame;
 import com.oracle.truffle.api.nodes.UnexpectedResultException;
 import com.oracle.truffle.api.profiles.ConditionProfile;
 
-@ReportPolymorphism
 @GenerateUncached
 public abstract class CallUnaryMethodNode extends CallSpecialMethodNode {
 
@@ -254,6 +254,7 @@ static Object callBinaryMethod(VirtualFrame frame, @SuppressWarnings("unused") P
 
     @Specialization(replaces = {"callIntSingle", "callInt", "callLongSingle", "callLong", "callDoubleSingle", "callDouble", "callBoolSingle", "callBool", "callObjectSingleContext",
                     "callMethodSingleContext", "callSelfMethodSingleContext", "callMethod", "callSelfMethod", "callBinaryMethodSingleContext", "callBinaryMethod"})
+    @Megamorphic
     static Object call(VirtualFrame frame, Object func, Object receiver,
                     @Cached("create()") CallNode callNode,
                     @Cached ConditionProfile isBoundProfile) {
diff --git a/graalpython/com.oracle.graal.python/src/com/oracle/graal/python/nodes/call/special/CallVarargsMethodNode.java b/graalpython/com.oracle.graal.python/src/com/oracle/graal/python/nodes/call/special/CallVarargsMethodNode.java
@@ -53,13 +53,13 @@
 import com.oracle.truffle.api.dsl.Cached;
 import com.oracle.truffle.api.dsl.GenerateUncached;
 import com.oracle.truffle.api.dsl.ReportPolymorphism;
+import com.oracle.truffle.api.dsl.ReportPolymorphism.Megamorphic;
 import com.oracle.truffle.api.dsl.Specialization;
 import com.oracle.truffle.api.frame.Frame;
 import com.oracle.truffle.api.frame.VirtualFrame;
 import com.oracle.truffle.api.profiles.ConditionProfile;
 
 @GenerateUncached
-@ReportPolymorphism
 public abstract class CallVarargsMethodNode extends CallSpecialMethodNode {
 
     public abstract Object execute(Frame frame, Object callable, Object[] arguments, PKeyword[] keywords);
@@ -136,6 +136,7 @@ Object callQuaternary(VirtualFrame frame, Object callable, Object[] arguments, @
     }
 
     @Specialization(replaces = {"callVarargsDirect", "callVarargs", "callSelfMethodSingleContext", "callSelfMethod", "callUnary", "callBinary", "callTernary", "callQuaternary"})
+    @Megamorphic
     Object call(VirtualFrame frame, Object func, Object[] arguments, PKeyword[] keywords,
                     @Cached CallNode callNode,
                     @Cached ConditionProfile isBoundProfile) {
diff --git a/graalpython/com.oracle.graal.python/src/com/oracle/graal/python/nodes/call/special/LookupAndCallBinaryNode.java b/graalpython/com.oracle.graal.python/src/com/oracle/graal/python/nodes/call/special/LookupAndCallBinaryNode.java
@@ -84,8 +84,8 @@
 // The (int, double) and (double, int) specializations are needed to avoid int->long conversion.
 // Although it would produce correct results, the special handling of long to double comparison
 // is slower than converting int->double, which is always correct.
-@ReportPolymorphism
 @ImportStatic(PythonOptions.class)
+@ReportPolymorphism
 public abstract class LookupAndCallBinaryNode extends Node {
 
     public abstract static class NotImplementedHandler extends PNodeWithContext {
@@ -550,4 +550,4 @@ public String getRname() {
         return rname;
     }
 
-}
+}
diff --git a/graalpython/com.oracle.graal.python/src/com/oracle/graal/python/nodes/call/special/LookupAndCallUnaryNode.java b/graalpython/com.oracle.graal.python/src/com/oracle/graal/python/nodes/call/special/LookupAndCallUnaryNode.java
@@ -54,14 +54,14 @@
 import com.oracle.truffle.api.dsl.GenerateUncached;
 import com.oracle.truffle.api.dsl.ImportStatic;
 import com.oracle.truffle.api.dsl.ReportPolymorphism;
+import com.oracle.truffle.api.dsl.ReportPolymorphism.Megamorphic;
 import com.oracle.truffle.api.dsl.Specialization;
 import com.oracle.truffle.api.frame.VirtualFrame;
 import com.oracle.truffle.api.library.CachedLibrary;
 import com.oracle.truffle.api.nodes.Node;
 import com.oracle.truffle.api.nodes.UnexpectedResultException;
 import com.oracle.truffle.api.profiles.ConditionProfile;
 
-@ReportPolymorphism
 @ImportStatic(PythonOptions.class)
 public abstract class LookupAndCallUnaryNode extends Node {
 
@@ -237,6 +237,7 @@ Object callObject(VirtualFrame frame, Object receiver,
     }
 
     @Specialization(replaces = "callObject")
+    @Megamorphic
     Object callObjectUncached(VirtualFrame frame, Object receiver,
                     @CachedLibrary(limit = "1") PythonObjectLibrary lib,
                     @Cached("create(name, ignoreDescriptorException)") LookupSpecialMethodNode getattr,
diff --git a/graalpython/com.oracle.graal.python/src/com/oracle/graal/python/nodes/classes/IsSubtypeNode.java b/graalpython/com.oracle.graal.python/src/com/oracle/graal/python/nodes/classes/IsSubtypeNode.java
@@ -58,7 +58,7 @@
 import com.oracle.truffle.api.dsl.Cached;
 import com.oracle.truffle.api.dsl.GenerateUncached;
 import com.oracle.truffle.api.dsl.ImportStatic;
-import com.oracle.truffle.api.dsl.ReportPolymorphism;
+import com.oracle.truffle.api.dsl.ReportPolymorphism.Megamorphic;
 import com.oracle.truffle.api.dsl.Specialization;
 import com.oracle.truffle.api.frame.Frame;
 import com.oracle.truffle.api.frame.VirtualFrame;
@@ -71,7 +71,6 @@
 @GenerateUncached
 @NodeInfo(shortName = "cpython://Objects/abstract.c/recursive_issubclass")
 @ImportStatic({PythonOptions.class, PGuards.class})
-@ReportPolymorphism
 public abstract class IsSubtypeNode extends PNodeWithContext {
     protected abstract boolean executeInternal(Frame frame, Object derived, Object cls);
 
@@ -258,6 +257,7 @@ boolean isSubtypeGenericCachedLen(@SuppressWarnings("unused") Object derived, Ob
                     "isSubtypeOfVariableTypeCached",
                     "isSubtypeGenericCachedLen"
     }, limit = "4")
+    @Megamorphic
     boolean issubTypeGeneric(Object derived, Object cls,
                     @SuppressWarnings("unused") @CachedLibrary("derived") PythonObjectLibrary libD,
                     @SuppressWarnings("unused") @CachedLibrary("cls") PythonObjectLibrary libC,
@@ -277,6 +277,7 @@ boolean issubTypeGeneric(Object derived, Object cls,
     }
 
     @Specialization(guards = {"!libD.isLazyPythonClass(derived) || !libC.isLazyPythonClass(cls)"})
+    @Megamorphic
     public boolean fallback(VirtualFrame frame, Object derived, Object cls,
                     @SuppressWarnings("unused") @CachedLibrary(limit = "3") PythonObjectLibrary libD,
                     @SuppressWarnings("unused") @CachedLibrary(limit = "3") PythonObjectLibrary libC,
diff --git a/graalpython/com.oracle.graal.python/src/com/oracle/graal/python/runtime/ExecutionContext.java b/graalpython/com.oracle.graal.python/src/com/oracle/graal/python/runtime/ExecutionContext.java
diff --git a/graalpython/com.oracle.graal.python/src/com/oracle/graal/python/runtime/object/PythonObjectFactory.java b/graalpython/com.oracle.graal.python/src/com/oracle/graal/python/runtime/object/PythonObjectFactory.java
