RFR: 8306706: Support out-of-line code generation for MachNodes

Sun Apr 23 18:29:36 UTC 2023

Hi,

This patch adds supports for MachNodes to emit an out-of-line piece of code in the stub section of the compiled method. This allows the separation of the uncommon path from the common one, which speeds up the common path a little bit and increases compiled code density. Please take a look and leave reviews.

Thanks a lot.

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Commit messages:
 - move opnd_array to private
 - copyright
 - prototype

Changes: https://git.openjdk.org/jdk/pull/13602/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=13602&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8306706
  Stats: 232 lines in 10 files changed: 175 ins; 16 del; 41 mod
  Patch: https://git.openjdk.org/jdk/pull/13602.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/13602/head:pull/13602

PR: https://git.openjdk.org/jdk/pull/13602