Ruby

ZJIT: Profile opt_succ and inline Integer#succ for Fixnum (#14846)

This is only really called a lot in the benchmark harness, as far as I
can tell.

ZJIT: Inline String#getbyte (#14842)

Use explicit memory orders in concurrent_set

The atomic load/store operations here should mostly be using
release/acquire semantics. This may lead to better performance than what
we had under the default seq_cst.

On x86 this may make the atomic store of hash faster, as it can avoid...

Use BUILTIN_TYPE in gc_mark_check_t_none

Fix assert_equal order in test_namespace.rb

The expected value is the first parameter and the actual value is the
second in assert_equal.

ZJIT: Rewrite arm64_split_with_scratch_reg for clarity

• The while loop pattern can be rewritten to be more idiomatic, which
  also allows the iterator to no longer be mutable.

ZJIT: Use rb_gc_disable() over rb_gc_disable_no_rest()

no_rest() trips an assert inside the GC when we allocate with the GC
disabled this way:

(gc_continue) ../src/gc/default/default.c:2029
(newobj_cache_miss+0x128) [0x105040048] ../src/gc/default/default.c:2370...

[ruby/prism] explicitly cast constants in initializers as well

https://github.com/ruby/prism/commit/e7db2b06ab

[ruby/prism] explicitly cast shifted constant to unsigned to avoid undefined behavior

https://github.com/ruby/prism/commit/0b2710a6c9

ZJIT: Add HashAref to HIR and inline Hash#[] to HashAref (#14838)

Fixes https://github.com/Shopify/ruby/issues/793

Testing on liquid-render:¶

***ZJIT: Printing ZJIT statistics on exit***
Top-20 not inlined C methods (96.8% of total 20,222,783):...