--- a/jvmci/jdk.vm.ci.code/src/jdk/vm/ci/code/BytecodePosition.java	Thu Sep 29 10:01:23 2016 +0200
+++ b/jvmci/jdk.vm.ci.code/src/jdk/vm/ci/code/BytecodePosition.java	Thu Sep 29 12:04:27 2016 +0200
@@ -43,18 +43,15 @@
      *
      * @param caller the parent position
      * @param method the method
-     * @param bci a BCI within the method
+     * @param bci a BCI such that {@code method.codeSize() == 0 || bci < method.getCodeSize()}. That
+     *            is, if code size is 0 then allow any value, otherwise the bci must be less than
+     *            the code size.
      */
     public BytecodePosition(BytecodePosition caller, ResolvedJavaMethod method, int bci) {
         assert method != null;
         this.caller = caller;
         this.method = method;
         this.bci = bci;
-        /*
-         * Make sure the bci is within range of the bytecodes. If the code size is 0 then allow any
-         * value, otherwise the bci must be less than the code size. Any negative value is also
-         * allowed to represent special bytecode states.
-         */
         int codeSize = method.getCodeSize();
         if (codeSize != 0 && bci >= codeSize) {
             throw new IllegalArgumentException(String.format("bci %d is out of range for %s %d bytes", bci, method.format("%H.%n(%p)"), codeSize));