Profile whether a generator creates a coroutine

Since the vast majority of generators only ever
end up creating one or the other, a condition
profile significantly speeds up generator
creation

Author: Adam Hrbac

graalpython/com.oracle.graal.python/src/com/oracle/graal/python/nodes/bytecode/PBytecodeGeneratorFunctionRootNode.java

@@ -53,6 +53,7 @@
 import com.oracle.truffle.api.RootCallTarget;
 import com.oracle.truffle.api.frame.FrameDescriptor;
 import com.oracle.truffle.api.frame.VirtualFrame;
+import com.oracle.truffle.api.profiles.ConditionProfile;
 import com.oracle.truffle.api.source.SourceSection;
 import com.oracle.truffle.api.strings.TruffleString;
 
@@ -63,6 +64,7 @@ public class PBytecodeGeneratorFunctionRootNode extends PRootNode {
     @CompilationFinal(dimensions = 1) private final RootCallTarget[] callTargets;
 
     @Child private PythonObjectFactory factory = PythonObjectFactory.create();
+    private final ConditionProfile isIterableCoroutine = ConditionProfile.create();
 
     @TruffleBoundary
     public PBytecodeGeneratorFunctionRootNode(PythonLanguage language, FrameDescriptor frameDescriptor, PBytecodeRootNode rootNode, TruffleString originalName) {
@@ -85,12 +87,11 @@ public Object execute(VirtualFrame frame) {
             // if CO_ITERABLE_COROUTINE was explicitly set (likely by types.coroutine), we have to
             // pass the information to the generator
             // .gi_code.co_flags will still be wrong, but at least await will work correctly
-            if ((generatorFunction.getCode().getFlags() & 0x100) != 0) {
+            if (isIterableCoroutine.profile((generatorFunction.getCode().getFlags() & 0x100) != 0)) {
                 return factory.createIterableCoroutine(generatorFunction.getName(), generatorFunction.getQualname(), rootNode, callTargets, arguments);
             } else {
                 return factory.createGenerator(generatorFunction.getName(), generatorFunction.getQualname(), rootNode, callTargets, arguments);
             }
-
         } else if (rootNode.getCodeUnit().isCoroutine()) {
             return factory.createCoroutine(generatorFunction.getName(), generatorFunction.getQualname(), rootNode, callTargets, arguments);
         } else if (rootNode.getCodeUnit().isAsyncGenerator()) {