From a57c899eb118da796e045f6ea43d7c941081760e Mon Sep 17 00:00:00 2001
From: Lokathor <zefria@gmail.com>
Date: Fri, 21 Dec 2018 18:10:45 -0700
Subject: [PATCH] trying a test case for clzsi2

---
 library/compiler-builtins/testcrate/build.rs | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/library/compiler-builtins/testcrate/build.rs b/library/compiler-builtins/testcrate/build.rs
index d862e0d0ffbf..08c14fda5334 100644
--- a/library/compiler-builtins/testcrate/build.rs
+++ b/library/compiler-builtins/testcrate/build.rs
@@ -775,6 +775,12 @@ fn main() {
                 (builtins::int::udiv::__udivmodti4(a, b, Some(&mut r)), r)
             }");
     }
+    
+    // count leading zeros
+    gen(|(a): (usize)| {
+            Some(a.leading_zeros())
+        },
+        "builtins::int::__clzsi2(a)");
 }
 
 macro_rules! gen_float {