RFR: 8341512: Optimize StackMapGenerator::processInvokeInstructions [v3]

[Shaojin Wen]

> A small optimization for StackMapGenerator::processInvokeInstructions.
> 
> 1. Use local currentFrame to avoid multiple getfields
> 2. remove Util.methodTypeSymbol(NameAndTypeEntry)
> 3. Use decStack instead of popStack to reduce array access in popStack
> 4. codeSize reduced from 277 to 262

Shaojin Wen has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains five commits:

 - Merge branch 'master' into optim_classfile_stack_map_process_invoke_202410
 - Update src/java.base/share/classes/java/lang/classfile/attribute/EnclosingMethodAttribute.java
   
   Co-authored-by: ExE Boss <3889017+ExE-Boss at users.noreply.github.com>
 - use decStack instead of popStack
 - remove Util.methodTypeSymbol(NameAndTypeEntry)
 - optimize processInvokeInstructions

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Changes: https://git.openjdk.org/jdk/pull/21344/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=21344&range=02
  Stats: 20 lines in 10 files changed: 1 ins; 7 del; 12 mod
  Patch: https://git.openjdk.org/jdk/pull/21344.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/21344/head:pull/21344

PR: https://git.openjdk.org/jdk/pull/21344