JIT: tagged union for part of GenTreeCall

[AndyAyersMS]

Add tagging support for the "big" union in GenTreeCall.

[dotnet-policy-service]

Tagging subscribers to this area: @JulieLeeMSFT, @jakobbotsch
See info in area-owners.md if you want to be subscribed.

[jakobbotsch]

One related thing I had been thinking of is factoring the rarely used state of GenTreeCall into a lazily created object. Then adding new fields to that object wouldn't be quite as expensive and wouldn't affect the size of all large nodes. We might be able to make the common GenTreeCall nodes smaller while making the rare ones a little bit larger.

[sirntar]

@dotnet/samsung

[risc-vv]

RISC-V Release-CLR-QEMU: 9082 / 9112 (99.67%)

=======================
      passed: 9082
      failed: 2
     skipped: 599
      killed: 28
------------------------
 TOTAL tests: 9711
VIRTUAL time: 35h 14min 26s 491ms
   REAL time: 36min 4s 147ms
=======================

report.xml, report.md, failures.xml, testclr_details.tar.zst

RISC-V Release-CLR-VF2: 9083 / 9113 (99.67%)

=======================
      passed: 9083
      failed: 2
     skipped: 599
      killed: 28
------------------------
 TOTAL tests: 9712
VIRTUAL time: 11h 17min 39s 935ms
   REAL time: 46min 4s 327ms
=======================

report.xml, report.md, failures.xml, testclr_details.tar.zst

Build information and commands

GIT: 9c936db4a831a494b73dd1f860ec6423b7157d72
CI: ff51305a244b14413d8afd782debae409d7468b8
REPO: AndyAyersMS/runtime
BRANCH: GenTreeCallTaggedUnion
CONFIG: Release
LIB_CONFIG: Release

[dotnet-policy-service]

Draft Pull Request was automatically closed for 30 days of inactivity. Please let us know if you'd like to reopen it.