Use the more descriptive opt_assert for when things go wrong.

rvm/src/org/jikesrvm/compilers/opt/OptimizingCompilerException.java

@@ -14,6 +14,7 @@
 
 import java.io.PrintWriter;
 import java.io.StringWriter;
+import org.jikesrvm.VM;
 import org.jikesrvm.classloader.TypeReference;
 
 /**
@@ -202,6 +203,18 @@ public static void TODO(String module) throws OptimizingCompilerException {
     throw new OptimizingCompilerException(module, "Unsupported function in IA32 port");
   }
 
+  /**
+   * Opt assertion failure that will also dump IR
+   */
+  public static void opt_assert(boolean b) {
+    if (!VM.VerifyAssertions) {
+      throw new Error("Assertion should have been guard by VM.VerifyAssertions");
+    }
+    if (!b) {
+      throw new OptimizingCompilerException("Assertion failure");
+    }
+  }
+
   /**
    * Return a string that is the printout of level stackframes in the stacktrace.
    * @param level the number of levels to print