YJIT: Add inline_block_count stat (#12081)

yjit.rb

@@ -382,6 +382,7 @@ module RubyVM::YJIT
       out.puts "compiled_iseq_count:   " + format_number(13, stats[:compiled_iseq_count])
       out.puts "compiled_blockid_count:" + format_number(13, stats[:compiled_blockid_count])
       out.puts "compiled_block_count:  " + format_number(13, stats[:compiled_block_count])
+      out.puts "inline_block_count:    " + format_number_pct(13, stats[:inline_block_count], stats[:compiled_block_count])
       out.puts "deleted_defer_block_count:" + format_number_pct(10, stats[:deleted_defer_block_count], stats[:compiled_block_count])
       if stats[:compiled_blockid_count] != 0
         out.puts "versions_per_block:    " + format_number(13, "%4.3f" % (stats[:compiled_block_count].fdiv(stats[:compiled_blockid_count])))

yjit/src/core.rs

@@ -2309,7 +2309,9 @@ pub fn limit_block_versions(blockid: BlockId, ctx: &Context) -> Context {
 
         return generic_ctx;
     }
+    if ctx.inline() {
         incr_counter_to!(max_inline_versions, next_versions);
+    }
 
     return *ctx;
 }
@@ -2367,6 +2369,9 @@ unsafe fn add_block_version(blockref: BlockRef, cb: &CodeBlock) {
     }
 
     incr_counter!(compiled_block_count);
+    if Context::decode(block.ctx).inline() {
+        incr_counter!(inline_block_count);
+    }
 
     // Mark code pages for code GC
     let iseq_payload = get_iseq_payload(block.iseq.get()).unwrap();

yjit/src/stats.rs

@@ -282,6 +282,7 @@ pub const DEFAULT_COUNTERS: &'static [Counter] = &[
     Counter::compiled_branch_count,
     Counter::compile_time_ns,
     Counter::max_inline_versions,
+    Counter::inline_block_count,
     Counter::num_contexts_encoded,
     Counter::context_cache_hits,
 
@@ -570,6 +571,7 @@ make_counters! {
     branch_insn_count,
     branch_known_count,
     max_inline_versions,
+    inline_block_count,
     num_contexts_encoded,
 
     freed_iseq_count,