Use TruffleBoundary to invalidate nonconstant assumptions.

Author: fangerer

graalpython/com.oracle.graal.python/src/com/oracle/graal/python/builtins/objects/cext/CExtNodes.java

@@ -141,6 +141,7 @@
 import com.oracle.truffle.api.CompilerAsserts;
 import com.oracle.truffle.api.CompilerDirectives;
 import com.oracle.truffle.api.CompilerDirectives.CompilationFinal;
+import com.oracle.truffle.api.CompilerDirectives.TruffleBoundary;
 import com.oracle.truffle.api.TruffleLanguage.ContextReference;
 import com.oracle.truffle.api.TruffleLogger;
 import com.oracle.truffle.api.dsl.Cached;
@@ -3034,8 +3035,9 @@ static void doPrimitiveNativeWrapper(@SuppressWarnings("unused") Object delegate
                         @Cached("createCountingProfile()") ConditionProfile hasHandleValidAssumptionProfile,
                         @Shared("contextRef") @CachedContext(PythonLanguage.class) ContextReference<PythonContext> contextRef) {
             assert !isSmallIntegerWrapperSingleton(contextRef, nativeWrapper) : "clearing primitive native wrapper singleton of small integer";
-            if (hasHandleValidAssumptionProfile.profile(nativeWrapper.getHandleValidAssumption() != null)) {
-                nativeWrapper.getHandleValidAssumption().invalidate("releasing handle for native wrapper");
+            Assumption handleValidAssumption = nativeWrapper.getHandleValidAssumption();
+            if (hasHandleValidAssumptionProfile.profile(handleValidAssumption != null)) {
+                invalidate(handleValidAssumption);
             }
         }
 
@@ -3056,6 +3058,11 @@ static void doOther(@SuppressWarnings("unused") Object delegate, @SuppressWarnin
             // ignore
         }
 
+        @TruffleBoundary
+        private static void invalidate(Assumption assumption) {
+            assumption.invalidate("releasing handle for native wrapper");
+        }
+
         static boolean isPrimitiveNativeWrapper(PythonNativeWrapper nativeWrapper) {
             return nativeWrapper instanceof PrimitiveNativeWrapper;
         }