RFR(S): 8204473 - AARCH64: register post-index addressing mode is not supported directly

[Dmitrij Pochepko]

Hi all,

please review patch for: JDK-8204473 -  AARCH64: register post-index 
addressing mode is not supported directly

This patch adds new addressing mode: "post_reg"  (register post-index) 
with respective changes in code. It is used for ld* and st* 
instructions. Before this patch, this mode could be enabled by using 
base_plus_offset_reg, which makes code confusing.


Testing: I launched hotspot jtreg compiler tests to ensure nothing is 
broken. No new failures found.


webrev: http://cr.openjdk.java.net/~dpochepk/8204473/webrev.01/

CR: https://bugs.openjdk.java.net/browse/JDK-8204473


Thanks,

Dmitrij