[9] RFR(S): 8139377: JVM can't be started w/ -XX:+EnableJVMCI -XX:+UseJVMCICompiler and default TypeProfileWidth

[Zoltán Majó]

Hi,


please review the following patch for JDK-8139377.

Bug: https://bugs.openjdk.java.net/browse/JDK-8139377

Problem: JDK-8078554 defined a valid range for compiler-related 
command-line flags. The JVM checks at runtime if the value of each flag 
is within the range defined for the flag. JEP 243 (Java-Level JVM 
Compiler Interface) increased the value of TypeProfileWidth to 8 that is 
outside of the currently defined range for that flag.

Solution: Increase the upper bound of TypeProfileWidth to 8. I also 
tried to increase the value to 16 but that value triggers an assert on 
one of our supported platforms.

Webrev:
http://cr.openjdk.java.net/~zmajo/8139377/webrev.00/

Testing:
- all tests in hotspot/test/runtime/CommandLine on all supported 
platforms, all tests pass;
- JPRT (testset hotspot), all tests pass.

Thank you and best regards,


Zoltan