On aix, allocating the compressed class space at a given size is unlikely to succeed. Therefore often the Compressed Class Space is allocated in upper memory regions.
Using the search implemented for aarch helps, but use smaller steps below 32G because it helps aix to have zero base, but it does not require 4G alignment.
This fixes test CompressedClassPointers.java.
Using the search implemented for aarch helps, but use smaller steps below 32G because it helps aix to have zero base, but it does not require 4G alignment.
This fixes test CompressedClassPointers.java.