[10] RFR(XS): 8180587: Assert in layout_helper_log2_element_size(jint) compares bits instead of bytes

[Tobias Hartmann]

Hi,

please review the following patch:
https://bugs.openjdk.java.net/browse/JDK-8180587
http://cr.openjdk.java.net/~thartmann/8180587/webrev.00/

While working on value types, I wondered that the "l2esz <= LogBitsPerLong" assert in layout_helper_log2_element_size() did not fire although the array element size of a value type is greater than the size of a long. The problem is that the assert compares the log2 element size which is in bytes (see initialization in Klass::array_layout_helper()) to LogBitsPerLong which obviously is in bits.

Thanks,
Tobias