From ab906179ccd6254f51f0d254479c9b211b0276b1 Mon Sep 17 00:00:00 2001
From: Nicholas Nethercote <nnethercote@mozilla.com>
Date: Tue, 18 Feb 2020 15:42:11 +1100
Subject: [PATCH] Always inline `run_utf8_validation`.

It only has two call sites, and the one within `from_utf8` is hot within
rustc itself.
---
 src/libcore/str/mod.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/libcore/str/mod.rs b/src/libcore/str/mod.rs
index 734b3ba7c6b..a943e49c3e2 100644
--- a/src/libcore/str/mod.rs
+++ b/src/libcore/str/mod.rs
@@ -1499,7 +1499,7 @@ fn contains_nonascii(x: usize) -> bool {
 
 /// Walks through `v` checking that it's a valid UTF-8 sequence,
 /// returning `Ok(())` in that case, or, if it is invalid, `Err(err)`.
-#[inline]
+#[inline(always)]
 fn run_utf8_validation(v: &[u8]) -> Result<(), Utf8Error> {
     let mut index = 0;
     let len = v.len();