C2's final graph reshaping performs the following transformation:
Original pattern: LoadConP + Storage access
Transformed pattern: LoadConN + DecodeN heap-based + Storage access

This seems to be fine for simpler compressed oops mode. It also seems to be fine on x86 which can match the decoding into the operand of the Storage access instruction.

Other platforms should better skip the transformation.

JDK-8155729 implemented these changes for aarch64 and ppc64.

This RFE targets other platforms.