8253964: [Graal] UnschedulableGraphTest#test01fails with expected:<4> but was:<3>

Reviewed-by: kvn, dlong

Author: David Leopoldseder

src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.core.test/src/org/graalvm/compiler/core/test/UnschedulableGraphTest.java

@@ -41,6 +41,7 @@
 import org.graalvm.compiler.nodes.cfg.Block;
 import org.graalvm.compiler.nodes.extended.OpaqueNode;
 import org.graalvm.compiler.options.OptionValues;
+import org.graalvm.compiler.phases.OptimisticOptimizations;
 import org.junit.Assert;
 import org.junit.Test;
 
@@ -98,6 +99,16 @@ private DebugContext getDebugContext(ResolvedJavaMethod method) {
         return getDebugContext(options, null, method);
     }
 
+    @Override
+    protected OptimisticOptimizations getOptimisticOptimizations() {
+        /*
+         * Disable optimistic optimizations to make the test more resilient towards wrong/strange
+         * profiling information and the removal of never executed code as this can cause the
+         * assertions in this test to fail since the control flow graph is in an uncommon shape.
+         */
+        return OptimisticOptimizations.NONE;
+    }
+
     @Test
     @SuppressWarnings("try")
     public void test01() {