RFR: 8256438: AArch64: Implement match rules with ROR shift register value

[Eric Liu]

This patch transforms '(x >>> rshift) + (x << lshift)' into
'RotateRight(x, rshift)' during GVN phase when both the shift exponents
are constants and their sum equals to the number of bits for the type
of shift base.

This patch implements some new match rules for AArch64 instructions
which can take ROR as the optional shift. Such instructions are 'and',
'or', 'eor', 'eon', 'bic' and 'orn'.

  ror     w11, w2, #5
  eor     w0, w1, w11

With this patch, above code could be optimized to below:

  eor     w0, w1, w2, ror #5

Finally, the patch refactors TestRotate.java[1][2].

Tested jtreg TestRotate.java, hotspot::hotspot_all_no_apps,
jdk::jdk_core, langtools::tier1.

[1] https://bugs.openjdk.java.net/browse/JDK-8252776
[2] https://mail.openjdk.java.net/pipermail/hotspot-compiler-dev/2020-September/039911.html

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Commit messages:
 - 8256438: AArch64: Implement match rules with ROR shift register value

Changes: https://git.openjdk.java.net/jdk/pull/1858/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=1858&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8256438
  Stats: 954 lines in 4 files changed: 630 ins; 24 del; 300 mod
  Patch: https://git.openjdk.java.net/jdk/pull/1858.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/1858/head:pull/1858

PR: https://git.openjdk.java.net/jdk/pull/1858