RFR: 8303553: AArch64: Add BCAX backend rule

[changpeng1997]

We can use BCAX[1][2] to merge a bit clear and an exclusive-OR operation. For example, on a 128-bit aarch64 machine which supports NEON and SHA3, following instruction sequence:


...
bic     v16.16b, v16.16b, v17.16b
eor     v16.16b, v16.16b, v18.16b
...


can be optimized to:


...
bcax    v16.16b, v17.16b, v16.16b, v18.16b
...


This patch adds backend rules for BCAX, and we can gain almost 10% performance lift on a 128-bit aarch64 machine which supports NEON and SHA3. Similar performance uplift can also be observed on SVE2.

Performance_Before:


Benchmark                 Score(op/ms)     Error
TestByte#size(2048)       9779.361         47.184
TestInt#size(2048)        3028.617         7.292
TestLong#size(2048)       1331.216         1.815
TestShort#size(2048)      5828.089         8.975


Performance_BCAX_NEON:


Benchmark                 Score(op/ms)     Error
TestByte#size(2048)       10510.371        34.931
TestInt#size(2048)        3437.512         81.318
TestLong#size(2048)       1461.023         0.679
TestShort#size(2048)      6238.210         26.452


[1]: https://developer.arm.com/documentation/ddi0596/2021-12/SIMD-FP-Instructions/BCAX--Bit-Clear-and-XOR-
[2]: https://developer.arm.com/documentation/ddi0602/2022-12/SVE-Instructions/BCAX--Bitwise-clear-and-exclusive-OR-?lang=en

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

Commit messages:
 - 8303553: AArch64: Add BCAX backend rule

Changes: https://git.openjdk.org/jdk/pull/13222/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=13222&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8303553
  Stats: 468 lines in 9 files changed: 433 ins; 0 del; 35 mod
  Patch: https://git.openjdk.org/jdk/pull/13222.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/13222/head:pull/13222

PR: https://git.openjdk.org/jdk/pull/13222