YJIT: getinstancevariable cache indexes for types other than T_OBJECT

2025-08-28T22:02:29+00:00

While accessing the ivars of other types is too complicated to
realistically generate the ASM for it, we can at least provide
the ivar index as to not have to lookup the shape tree every
time.

```
compare-ruby: ruby 3.5.0dev (2025-08-27T14:58:58Z merge-vm-setivar-d.. 5b749d8e53) +YJIT +PRISM [arm64-darwin24]
built-ruby: ruby 3.5.0dev (2025-08-28T17:58:32Z yjit-get-exivar efaa8c9b09) +YJIT +PRISM [arm64-darwin24]

|                           |compare-ruby|built-ruby|
|:--------------------------|-----------:|---------:|
|vm_ivar_get_on_obj         |     930.458|   936.865|
|                           |           -|     1.01x|
|vm_ivar_get_on_class       |     134.471|   431.622|
|                           |           -|     3.21x|
|vm_ivar_get_on_generic     |     146.679|   284.408|
|                           |           -|     1.94x|
```

Co-Authored-By: Aaron Patterson

Fix style on vm_ivar benchmarks (#6379)

2022-09-15T00:39:39+00:00

Add vm_ivar get, get_unitialized, and lazy_set benchmarks

2022-09-14T20:50:47+00:00

ruby.git/benchmark/vm_ivar_get.yml, branch v4.0.4

YJIT: getinstancevariable cache indexes for types other than T_OBJECT

Fix style on vm_ivar benchmarks (#6379)

Add vm_ivar get, get_unitialized, and lazy_set benchmarks