From: Oliver Schneider <git-spam-no-reply9815368754983@oli-obk.de>
Date: Mon, 10 Jul 2017 07:50:36 +0000 (+0200)
Subject: The lint doesn't improve perf (yet)
X-Git-Url: https://git.lizzy.rs/?a=commitdiff_plain;h=a5fe4bed0e1cba04dbb0c0b359cc3096c74f09ec;p=rust.git

The lint doesn't improve perf (yet)
---

diff --git a/clippy_lints/src/bit_mask.rs b/clippy_lints/src/bit_mask.rs
index 889f74d52e7..f56c0b2aeb3 100644
--- a/clippy_lints/src/bit_mask.rs
+++ b/clippy_lints/src/bit_mask.rs
@@ -76,7 +76,7 @@
 ///
 /// **Why is this bad?** `x.trailing_zeros() > 4` is much clearer than `x & 15 == 0`
 ///
-/// **Known problems:** None
+/// **Known problems:** llvm generates better code for `x & 15 == 0` on x86
 ///
 /// **Example:**
 /// ```rust