Changes

OffHeap: Disable EA and idiom recognition till fixed for OffHeap

Signed-off-by: Shubham Verma <shubhamv.sv@gmail.com>
 (commit: b19d6c7)

Fix bug in lowering trees marked as internal pointer
Keep the internal pointer flag for the new nodes when
lowering trees.

Signed-off-by: Shubham Verma <shubhamv.sv@gmail.com>
 (commit: e29b0ae)

Move APIs from OpenJ9 to OMR to help with array access

APIs are:
`generateDataAddrLoadTrees`
`generateArrayAddressTrees` named `generateArrayElementAddressTrees`
`generateArrayStartTrees` named `generateFirstArrayElementAddressTrees`
`generateArrayOffsetTrees` named `generateConvertArrayElementIndexToOffsetTrees`

OpenJ9 commit to revert: https://github.com/eclipse-openj9/openj9/commit/e76675526bac40b6962133701dabbbfebaf82321

Signed-off-by: Abdulrahman Alattas <rmnattas@gmail.com>

name
 (commit: 0aaf99b)

Update Array helper APIs in ValuePropogationCommon for OffHeap

This commit is based on ed01b6dc36e7362986eda898463cc960135a82a5
Instead of modifying the code to support off-heap which as-is breaks
runs with arraylet environments, this commit adds separate paths for
off-heap while keeping the original paths as-is.

Code can be modified similar to the based-on commit to have gencon
runs using the array helper APIs while not affecting arraylet runs.

Signed-off-by: Abdulrahman Alattas <rmnattas@gmail.com>
 (commit: 644c1ce)

Treat contiguousArrayDataAddrFieldSymbol as Int64

dataAddr field width is always 64 bit so treating it as TR::Address results in
null being loaded from top 32 bits in compressed refs. We need the symbol to be
TR::Int64 for it be loaded correctly.

Signed-off-by: Shubham Verma <shubhamv.sv@gmail.com>
 (commit: a6e711a)