YJIT: Add splat optimized_send

[jimmyhmiller]

Big change here is in liquid-render where we go from 18978 exits for args_splat_optimized to 4219 iseq_splat_with_opt exits. Once this is combined with #7166 those numbers should go down as well.

Before

ruby 3.3.0dev (2023-01-20T21:07:03Z master 887d21613c) +YJIT dev [arm64-darwin22]
***YJIT: Printing YJIT statistics on exit***
method call exit reasons: 
                iseq_has_rest      41227 (66.1%)
         args_splat_optimized      18978 (30.4%)
                    block_arg       1324 ( 2.1%)
                zsuper_method        792 ( 1.3%)
        cfunc_ruby_array_varg         39 ( 0.1%)
     iseq_missing_optional_kw         39 ( 0.1%)
    args_splat_cfunc_var_args         11 ( 0.0%)
              ivar_set_method          1 ( 0.0%)
invokeblock exit reasons: 
                proc         90 (95.7%)
    iseq_tag_changed          4 ( 4.3%)
invokesuper exit reasons: 
    block          5 (100.0%)
leave exit reasons: 
        interp_return     287962 (100.0%)
    start_pc_non_zero        105 ( 0.0%)
         se_interrupt         16 ( 0.0%)
getblockparamproxy exit reasons: 
    (all relevant counters are zero)
getinstancevariable exit reasons:
    megamorphic          8 (100.0%)
setinstancevariable exit reasons:
    (all relevant counters are zero)
opt_aref exit reasons: 
    (all relevant counters are zero)
expandarray exit reasons: 
    (all relevant counters are zero)
opt_getinlinecache exit reasons: 
    (all relevant counters are zero)
invalidation reasons: 
       constant_ic_fill        149 (84.2%)
    constant_state_bump         19 (10.7%)
          method_lookup          9 ( 5.1%)
bindings_allocations:          77
bindings_set:                   0
compiled_iseq_count:          694
compiled_block_count:        5894
compiled_branch_count:       9771
block_next_count:            2019
defer_count:                 1992
freed_iseq_count:             181
invalidation_count:           177
constant_state_bumps:           0
inline_code_size:          920596
outlined_code_size:        918748
freed_code_size:                0
code_region_size:         1851392
yjit_alloc_size:         12031174
live_page_count:              113
freed_page_count:               0
code_gc_count:                  0
num_gc_obj_refs:             3878
object_shape_count:           538
side_exit_count:            84932
total_exit_count:          372894
total_insns_count:       19298312
vm_insns_count:           2599787
yjit_insns_count:        16783457
ratio_in_yjit:              86.5%
avg_len_in_yjit:             44.8
Top-12 most frequent exit ops (100.0% of exits):
    opt_send_without_block:      61372 (72.3%)
                     throw:      21517 (25.3%)
                      send:       1324 (1.6%)
      opt_getconstant_path:        369 (0.4%)
               invokesuper:        126 (0.1%)
               invokeblock:         94 (0.1%)
                    opt_eq:         87 (0.1%)
                     leave:         16 (0.0%)
                      once:         12 (0.0%)
          putspecialobject:         12 (0.0%)
                  opt_ltlt:          2 (0.0%)
                  opt_aref:          1 (0.0%)
itr #1: 562ms

After

ruby 3.3.0dev (2023-01-20T21:54:19Z yjit-send-splat-init 7a6345afb7) +YJIT dev [arm64-darwin22]
***YJIT: Printing YJIT statistics on exit***
method call exit reasons: 
                iseq_has_rest      41226 (86.5%)
          iseq_splat_with_opt       4219 ( 8.9%)
                    block_arg       1324 ( 2.8%)
                zsuper_method        792 ( 1.7%)
        cfunc_ruby_array_varg         39 ( 0.1%)
     iseq_missing_optional_kw         39 ( 0.1%)
    args_splat_cfunc_var_args         11 ( 0.0%)
              ivar_set_method          1 ( 0.0%)
invokeblock exit reasons: 
                proc         90 (95.7%)
    iseq_tag_changed          4 ( 4.3%)
invokesuper exit reasons: 
    block          5 (100.0%)
leave exit reasons: 
        interp_return     287940 (100.0%)
    start_pc_non_zero        105 ( 0.0%)
         se_interrupt         13 ( 0.0%)
getblockparamproxy exit reasons: 
    (all relevant counters are zero)
getinstancevariable exit reasons:
    megamorphic          8 (100.0%)
setinstancevariable exit reasons:
    (all relevant counters are zero)
opt_aref exit reasons: 
    (all relevant counters are zero)
expandarray exit reasons: 
    (all relevant counters are zero)
opt_getinlinecache exit reasons: 
    (all relevant counters are zero)
invalidation reasons: 
       constant_ic_fill        149 (84.2%)
    constant_state_bump         19 (10.7%)
          method_lookup          9 ( 5.1%)
bindings_allocations:          77
bindings_set:                   0
compiled_iseq_count:          694
compiled_block_count:        5911
compiled_branch_count:       9812
block_next_count:            2033
defer_count:                 1992
freed_iseq_count:             181
invalidation_count:           177
constant_state_bumps:           0
inline_code_size:          929836
outlined_code_size:        927636
freed_code_size:                0
code_region_size:         1867776
yjit_alloc_size:         12134656
live_page_count:              114
freed_page_count:               0
code_gc_count:                  0
num_gc_obj_refs:             3942
object_shape_count:           538
side_exit_count:            70161
total_exit_count:          358101
total_insns_count:       19421037
vm_insns_count:           2541164
yjit_insns_count:        16950034
ratio_in_yjit:              86.9%
avg_len_in_yjit:             47.1
Top-12 most frequent exit ops (100.0% of exits):
    opt_send_without_block:      46604 (66.4%)
                     throw:      21516 (30.7%)
                      send:       1324 (1.9%)
      opt_getconstant_path:        370 (0.5%)
               invokesuper:        126 (0.2%)
               invokeblock:         94 (0.1%)
                    opt_eq:         87 (0.1%)
                     leave:         13 (0.0%)
                      once:         12 (0.0%)
          putspecialobject:         12 (0.0%)
                  opt_ltlt:          2 (0.0%)
                   opt_neq:          1 (0.0%)
itr #1: 569ms

[jimmyhmiller]

Looking into this failure today

[maximecb]

Good work. Pretty soon we'll have (almost) no send exits in liquid :)