From d26d3575cab676ade7d0257138a044e22b373e68 Mon Sep 17 00:00:00 2001
From: Maxime Chevalier-Boisvert <maxime.chevalierboisvert@shopify.com>
Date: Tue, 4 Apr 2023 16:41:52 -0400
Subject: YJIT: add stats for ratio of versions per block (#7653)

---
 yjit/src/core.rs  | 5 +++++
 yjit/src/stats.rs | 1 +
 2 files changed, 6 insertions(+)

(limited to 'yjit/src')

diff --git a/yjit/src/core.rs b/yjit/src/core.rs
index 05e9f85b18..98b9e792c8 100644
--- a/yjit/src/core.rs
+++ b/yjit/src/core.rs
@@ -1416,6 +1416,11 @@ unsafe fn add_block_version(blockref: BlockRef, cb: &CodeBlock) {
 
     let version_list = get_or_create_version_list(block.get_blockid());
 
+    // If this the first block being compiled with this block id
+    if version_list.len() == 0 {
+        incr_counter!(compiled_blockid_count);
+    }
+
     version_list.push(blockref);
     version_list.shrink_to_fit();
 
diff --git a/yjit/src/stats.rs b/yjit/src/stats.rs
index 6ca19c93f3..0e832dbe71 100644
--- a/yjit/src/stats.rs
+++ b/yjit/src/stats.rs
@@ -316,6 +316,7 @@ make_counters! {
 
     vm_insns_count,
     compiled_iseq_count,
+    compiled_blockid_count,
     compiled_block_count,
     compiled_branch_count,
     compilation_failure,
-- 
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