Inline `Span` methods.

Because they are simple and hot.

This change speeds up some incremental runs of a few rustc-perf
benchmarks, the best by 3%.

diff --git a/src/libsyntax_pos/span_encoding.rs b/src/libsyntax_pos/span_encoding.rs
index b55fe4bcb26721ad8f913adbb441a9ade7294cc1..601a0273ae91178efa1b52a9c58321a1ea397d7c 100644 (file)
--- a/src/libsyntax_pos/span_encoding.rs
+++ b/src/libsyntax_pos/span_encoding.rs
@@ -31,11 +31,13 @@
 
 impl Copy for Span {}
 impl Clone for Span {
+    #[inline]
     fn clone(&self) -> Span {
         *self
     }
 }
 impl PartialEq for Span {
+    #[inline]
     fn eq(&self, other: &Span) -> bool {
         let a = self.0;
         let b = other.0;
@@ -44,6 +46,7 @@ fn eq(&self, other: &Span) -> bool {
 }
 impl Eq for Span {}
 impl Hash for Span {
+    #[inline]
     fn hash<H: Hasher>(&self, state: &mut H) {
         let a = self.0;
         a.hash(state)