RFR: 8346890: AArch64: Type profile counters generate suboptimal code

[Andrew Haley]

Type profile counters are emitted many times in C1-generated code. The generator was written a long time ago before we knew how best to write AArch64 code, and the generated code is rather suboptimal.

This PR reduces the size of a typical bimorphic type profile counter from 33 to 27 instructions.

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Commit messages:
 - 8346890: AArch64: Profile counters generate suboptimal code
 - tmp

Changes: https://git.openjdk.org/jdk/pull/23012/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=23012&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8346890
  Stats: 29 lines in 3 files changed: 14 ins; 6 del; 9 mod
  Patch: https://git.openjdk.org/jdk/pull/23012.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/23012/head:pull/23012

PR: https://git.openjdk.org/jdk/pull/23012