From 109ff12cd556e895f2f58d4f3088b6578dfbdbbe Mon Sep 17 00:00:00 2001
From: Michael Clark <michaeljclark@mac.com>
Date: Thu, 20 Jan 2022 19:34:26 +1300
Subject: [PATCH] histogram: use mi_bsr as it does the subtraction for us

---
 src/stats.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/stats.c b/src/stats.c
index 874d2d0b..1a5427e5 100644
--- a/src/stats.c
+++ b/src/stats.c
@@ -459,7 +459,8 @@ static _Atomic(size_t) mi_hist[MI_SIZE_BITS] = { 0 };
 
 void _mi_histogram_log(size_t size)
 {
-  size_t bucket = MI_SIZE_BITS - 1 - mi_clz(size);
+  if (mi_unlikely(size == 0)) return;
+  size_t bucket = mi_bsr(size);
   mi_atomic_increment_relaxed(mi_hist + bucket);
 }