RFR: 8304138: [JVMCI] Test FailedSpeculation existence before appending. [v2]

[Yudi Zheng]

> Upon uncommon_trap, JVMCI runtime appends a FailedSpeculation entry to the nmethod using an [atomic operation](https://github.com/openjdk/jdk/blob/55aa122462c34d8f4cafa58f4d1f2d900449c83e/src/hotspot/share/oops/methodData.cpp#L852). It becomes a performance bottleneck when there is a large amount of (virtual) threads deoptimizing in the nmethod. In this PR, we test if a FailedSpeculation exists in the list before appending it.

Yudi Zheng has updated the pull request incrementally with one additional commit since the last revision:

  avoid iterating from beginning.

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Changes:
  - all: https://git.openjdk.org/jdk/pull/13022/files
  - new: https://git.openjdk.org/jdk/pull/13022/files/2f9874df..e8c7eec4

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=13022&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=13022&range=00-01

  Stats: 2 lines in 1 file changed: 0 ins; 1 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/13022.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/13022/head:pull/13022

PR: https://git.openjdk.org/jdk/pull/13022