[code-reflection] RFR: Support bytecode generation for invocation of varArg method [v5]

[Mourad Abbay]

> Support bytecode generation for invocation of varArg method.

Mourad Abbay has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains eight additional commits since the last revision:

 - Apply suggestion
 - Merge branch 'code-reflection' into bytecode-gen-varArg
 - Add test for long and double
 - Apply Suggestions
 - Add method CoreOp.InvokeOp.argOperands
 - Add test cases for empty var arg, long and double
 - Move code related to InvokeOp from processOperands(Op).
 - Support bytecode generation for invocation of varArg method

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Changes:
  - all: https://git.openjdk.org/babylon/pull/272/files
  - new: https://git.openjdk.org/babylon/pull/272/files/0dfc24a2..79524797

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=babylon&pr=272&range=04
 - incr: https://webrevs.openjdk.org/?repo=babylon&pr=272&range=03-04

  Stats: 22830 lines in 496 files changed: 13839 ins; 6574 del; 2417 mod
  Patch: https://git.openjdk.org/babylon/pull/272.diff
  Fetch: git fetch https://git.openjdk.org/babylon.git pull/272/head:pull/272

PR: https://git.openjdk.org/babylon/pull/272