unroll longer frame syncs

Author: timfel

graalpython/com.oracle.graal.python/src/com/oracle/graal/python/nodes/frame/MaterializeFrameNode.java

@@ -309,7 +309,7 @@ public SyncFrameValuesNode(boolean adoptable) {
 
         public abstract void execute(VirtualFrame frame, PFrame pyframe, Frame frameToSync);
 
-        @Specialization(guards = {"hasLocalsStorage(pyFrame, frameToSync)", "frameToSync.getFrameDescriptor() == cachedFd", "cachedSlots.length < 32"}, //
+        @Specialization(guards = {"hasLocalsStorage(pyFrame, frameToSync)", "frameToSync.getFrameDescriptor() == cachedFd", "cachedSlots.length < 64"}, //
                         assumptions = "cachedFd.getVersion()", //
                         limit = "1")
         @ExplodeLoop