8204966: [TESTBUG] hotspot/test/compiler/whitebox/IsMethodCompilableTest.java...

8204966: [TESTBUG] hotspot/test/compiler/whitebox/IsMethodCompilableTest.java test fails with -XX:CompileThreshold=1
Summary: enforce lower bound on number of loop iterations used to trigger OSR
Reviewed-by: kvn, iignatyev

test/compiler/whitebox/CompilerWhiteBoxTest.java

 /*
- * Copyright (c) 2013, 2014, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2013, 2018, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -84,8 +84,8 @@ public abstract class CompilerWhiteBoxTest {
             BACKEDGE_THRESHOLD = THRESHOLD = 150000;
         } else {
             THRESHOLD = COMPILE_THRESHOLD;
-            BACKEDGE_THRESHOLD = COMPILE_THRESHOLD * Long.parseLong(getVMOption(
-                    "OnStackReplacePercentage"));
+            BACKEDGE_THRESHOLD = Math.max(10000, COMPILE_THRESHOLD *
+                    Long.parseLong(getVMOption("OnStackReplacePercentage")));
         }
     }