RFR: 8309893: Integrate ReplicateB/S/I/L/F/D nodes to Replicate node [v2]

[Eric Liu]

> This patch creates ReplicateNode to replace ReplicateB/S/I/L/F/DNode, like other vector nodes introduced recently, e.g., PopulateIndexNode and ReverseVNode, etc. This refers from:
> https://mail.openjdk.org/pipermail/panama-dev/2020-April/008484.html
> 
> After merging these nodes, code will be easier to maintain. E.g., matching rules can be simplified.
> 
> Besides AArch64, this patch tries to keep other ad files as the same before, only supplies some necessary predicate. E.g., for matching rules using ReplicateB before, they are now matching Replicate with a new predicate "Matcher::vector_element_basic_type(n) == T_BYTE". This would be easy for review and lower risks.
> 
> [TEST]
> x86:     Tested with option "-XX:UseAVX=0/1/2/3".
> AArch64: Tested on SVE machine and Neon machine.
> 
> Full jtreg passed without new issue.

Eric Liu has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains three commits:

 - small fix
   
   Change-Id: I121a8c1ad75e88c0af41f2c1ef00289a3d61f400
 - Merge jdk:master
   
   Change-Id: I4df10ba7290e9af02deeac5a931234a07be7c207
 - 8309893: Integrate ReplicateB/S/I/L/F/D nodes to Replicate node
   
   This patch creates ReplicateNode to replace ReplicateB/S/I/L/F/DNode,
   like other vector nodes introduced recently, e.g., PopulateIndexNode and
   ReverseVNode, etc. This refers from:
   https://mail.openjdk.org/pipermail/panama-dev/2020-April/008484.html
   
   After merging these nodes, code will be easier to maintain. E.g.,
   matching rules can be simplified.
   
   Besides AArch64, this patch tries to keep other ad files as the same
   before, only supplies some necessary predicate. E.g., for matching rules
   using ReplicateB before, they are now matching Replicate with a new
   predicate "Matcher::vector_element_basic_type(n) == T_BYTE". This would
   be easy for review and lower risks.
   
   [TEST]
   x86:     Tested with option "-XX:UseAVX=0/1/2/3".
   AArch64: Tested on SVE machine and Neon machine.
   
   Full jtreg passed without new issue.
   
   Change-Id: Icb16084e3909177ab302f0ba33c2216c860a5da6

-------------

Changes: https://git.openjdk.org/jdk/pull/14830/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=14830&range=01
  Stats: 929 lines in 20 files changed: 158 ins; 391 del; 380 mod
  Patch: https://git.openjdk.org/jdk/pull/14830.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/14830/head:pull/14830

PR: https://git.openjdk.org/jdk/pull/14830